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A multi-methodological approach to record dynamics and timescales of the plumbing system of Zaro (Ischia Island, Italy) (2024)
Journal Article
Pelullo, C., Chakraborty, S., Montagna, C. P., Arienzo, I., Brown, R. J., D’Antonio, M., …Petrosino, P. (2024). A multi-methodological approach to record dynamics and timescales of the plumbing system of Zaro (Ischia Island, Italy). Contributions to Mineralogy and Petrology, 179(5), Article 54. https://doi.org/10.1007/s00410-024-02138-9

Determining the time spans of processes related to the assembly of eruptible magma at active volcanoes is fundamental to understand magma chamber dynamics and assess volcanic hazard. This information can be recorded in the chemical zoning of crystals... Read More about A multi-methodological approach to record dynamics and timescales of the plumbing system of Zaro (Ischia Island, Italy).

Banding in the Margins of Basaltic Dykes Indicates Pulsatory Propagation During Emplacement (2024)
Journal Article
Allgood, C., Llewellin, E. W., Humphreys, M. C. S., Mathias, S. A., Brown, R. J., & Vye‐Brown, C. (2024). Banding in the Margins of Basaltic Dykes Indicates Pulsatory Propagation During Emplacement. Journal of Geophysical Research: Solid Earth, 129(4), Article e2023JB028007. https://doi.org/10.1029/2023jb028007

Basaltic fissure eruptions, which are the most common type of eruption on Earth, are fed by dykes which mediate magma transport through the crust. Dyke propagation processes are important because they determine the geometry of the transport pathway a... Read More about Banding in the Margins of Basaltic Dykes Indicates Pulsatory Propagation During Emplacement.

Alternating Subplinian and phreatomagmatic phases during the construction of a phonolitic maar-diatreme volcano (Caldera del Rey, Tenerife, Canary Islands) (2023)
Journal Article
Bowers, O., Dávila Harris, P., Winstanley, R., Wadsworth, F. B., & Brown, R. J. (2023). Alternating Subplinian and phreatomagmatic phases during the construction of a phonolitic maar-diatreme volcano (Caldera del Rey, Tenerife, Canary Islands). Journal of Volcanology and Geothermal Research, 443, 107920. https://doi.org/10.1016/j.jvolgeores.2023.107920

The Early Pleistocene, well exposed, Caldera del Rey maar-diatreme volcano, Tenerife, Canary Islands was constructed during a ∼ VEI 4 phonolitic eruption that involved two cycles of magmatic-to-phreatomagmatic activity and resulted in two overlapping... Read More about Alternating Subplinian and phreatomagmatic phases during the construction of a phonolitic maar-diatreme volcano (Caldera del Rey, Tenerife, Canary Islands).

Zircon double-dating, trace element and O isotope analysis to decipher late Pleistocene explosive-effusive eruptions from a zoned ocean-island magma system, Ascension Island (2023)
Journal Article
Scarrow, J. H., Schmitt, A. K., Danišík, M., Chamberlain, K. J., Davies, B. V., Rushton, J., …Barclay, J. (2023). Zircon double-dating, trace element and O isotope analysis to decipher late Pleistocene explosive-effusive eruptions from a zoned ocean-island magma system, Ascension Island. Quaternary Science Reviews, 319, Article 108304. https://doi.org/10.1016/j.quascirev.2023.108304

In this first detailed study of zircon from Ascension Island, South Atlantic, we take a novel approach combining trace element and O isotope compositional data with double-dating (disequilibrium 238U–230Th and (U–Th)/He) to decipher timescales and dy... Read More about Zircon double-dating, trace element and O isotope analysis to decipher late Pleistocene explosive-effusive eruptions from a zoned ocean-island magma system, Ascension Island.

Insights into the explosive eruption history of the Campanian volcanoes prior to the Campanian Ignimbrite eruption (2023)
Journal Article
Vineberg, S. O., Isaia, R., Albert, P. G., Brown, R. J., & Smith, V. C. (2023). Insights into the explosive eruption history of the Campanian volcanoes prior to the Campanian Ignimbrite eruption. Journal of Volcanology and Geothermal Research, 443, Article 107915. https://doi.org/10.1016/j.jvolgeores.2023.107915

The Campanian Volcanic Zone (CVZ) comprises multiple active volcanoes and includes the highly productive Campi Flegrei and Ischia caldera systems. These caldera volcanoes have produced probably the largest eruptions in Europe in the past 200 ka, such... Read More about Insights into the explosive eruption history of the Campanian volcanoes prior to the Campanian Ignimbrite eruption.

Ash aggregate-rich pyroclastic density currents of the 431 CE Tierra Blanca Joven eruption, Ilopango caldera, El Salvador (2023)
Journal Article
Brown, R. J., Van Eaton, A. R., Hernández, W., Condren, P., Sweeney, C., Tournigand, P., & Vallance, J. W. (2023). Ash aggregate-rich pyroclastic density currents of the 431 CE Tierra Blanca Joven eruption, Ilopango caldera, El Salvador. Journal of Volcanology and Geothermal Research, Article 107845. https://doi.org/10.1016/j.jvolgeores.2023.107845

The VEI 6, Tierra Blanca Joven pyroclastic sequence (30–90 km3 DRE volume), erupted from Ilopango caldera, El Salvador, in 431 CE, is the product of one of the largest eruptions of the last two millennia. The eruption devastated Central America's May... Read More about Ash aggregate-rich pyroclastic density currents of the 431 CE Tierra Blanca Joven eruption, Ilopango caldera, El Salvador.

Seismic wave propagation around subsurface igneous sill complexes (2023)
Journal Article
Sanford, O., Schofield, N., Hobbs, R., & Brown, R. (2023). Seismic wave propagation around subsurface igneous sill complexes. Marine and Petroleum Geology, 152, Article 106232. https://doi.org/10.1016/j.marpetgeo.2023.106232

Imaging both within and beneath subsurface igneous sill complexes is a seismic exploration challenge. A significant aspect of this challenge is due to a lack of understanding of the interaction between the heterogeneous geological structures and the... Read More about Seismic wave propagation around subsurface igneous sill complexes.

Uncertainties in Ray-Tracing Tomography Models Used for Sub-Basalt Seismic Imaging (2022)
Journal Article
Sanford, O., Hobbs, R., Brown, R., & Schofield, N. (2023). Uncertainties in Ray-Tracing Tomography Models Used for Sub-Basalt Seismic Imaging. Pure and Applied Geophysics, 180(1), 145-156. https://doi.org/10.1007/s00024-022-03199-2

Sequences of buried basalt lavas found along continental margins may be associated with hydrocarbon deposits. However, they have heterogeneous velocity and density structures that degrade seismic imaging of basalt and sub-basalt structures and make t... Read More about Uncertainties in Ray-Tracing Tomography Models Used for Sub-Basalt Seismic Imaging.

Growth of complex volcanic ash aggregates in the Tierra Blanca Joven eruption of Ilopango Caldera, El Salvador (2022)
Journal Article
Hoult, H., Brown, R. J., Van Eaton, A. R., Hernandez, W., Dobson, K. J., & Woodward, B. (2022). Growth of complex volcanic ash aggregates in the Tierra Blanca Joven eruption of Ilopango Caldera, El Salvador. Journal of Volcanology and Geothermal Research, 431, Article 107670. https://doi.org/10.1016/j.jvolgeores.2022.107670

Aggregation processes control both the residence time and dispersal of volcanic ash during eruptions yet remain incompletely understood. The products of aggregation vary from simple ash clusters to large, complexly layered accretionary lapilli. Here... Read More about Growth of complex volcanic ash aggregates in the Tierra Blanca Joven eruption of Ilopango Caldera, El Salvador.

Reconstruction of the 29th December 2013 eruption of San Miguel volcano, El Salvador, using video, photographs, and pyroclastic deposits (2022)
Journal Article
Brown, R. J., Hernández, W., Escobar, D., Gutierrez, E., Crummy, J., Cole, R., & Tournigand, P. (2022). Reconstruction of the 29th December 2013 eruption of San Miguel volcano, El Salvador, using video, photographs, and pyroclastic deposits. Volcanica, 5(2), 271 - 293. https://doi.org/10.30909/vol.05.02.271293

San Miguel (or Chaparrastique) volcano, El Salvador, erupted on the 29thDecember 2013, after almost 40 years of quiescence.Initial vent-clearing explosions ejected ballistic blocks and produced a pyroclastic density current (PDC) that flowed down the... Read More about Reconstruction of the 29th December 2013 eruption of San Miguel volcano, El Salvador, using video, photographs, and pyroclastic deposits.

Melt stripping and agglutination of pyroclasts during the explosive eruption of low viscosity magmas (2022)
Journal Article
Jones, T. J., Russell, J. K., Brown, R. J., & Hollendonner, L. (2022). Melt stripping and agglutination of pyroclasts during the explosive eruption of low viscosity magmas. Nature Communications, 13(1), https://doi.org/10.1038/s41467-022-28633-w

Volcanism on Earth and on other planets and satellites is dominated by the eruption of low viscosity magmas. During explosive eruption, high melt temperatures and the inherent low viscosity of the fluidal pyroclasts allow for substantial post-fragmen... Read More about Melt stripping and agglutination of pyroclasts during the explosive eruption of low viscosity magmas.

Pyroclastic Rocks (2021)
Book Chapter
Branney, M., Brown, R., & Calder, E. (2021). Pyroclastic Rocks. In S. Elias, & D. Alderton (Eds.), Encyclopedia of Geology (277-300). (2nd). Elsevier

Petrography and Mineral Chemistry of Monte Epomeo Green Tuff, Ischia Island, South Italy: Constraints for Identification of the Y-7 Tephrostratigraphic Marker in Distal Sequences of the Central Mediterranean (2021)
Journal Article
D'Antonio, M., Arienzo, I., Brown, R. J., Petrosino, P., Pelullo, C., & Giaccio, B. (2021). Petrography and Mineral Chemistry of Monte Epomeo Green Tuff, Ischia Island, South Italy: Constraints for Identification of the Y-7 Tephrostratigraphic Marker in Distal Sequences of the Central Mediterranean. Minerals, 11(9), Article 955. https://doi.org/10.3390/min11090955

The 56 ka Monte Epomeo Green Tuff (MEGT) resulted from the largest volume explosive eruption from Ischia island (south Italy). Its tephra is one of the main stratigraphic markers of the central Mediterranean area. Despite its importance, a detailed c... Read More about Petrography and Mineral Chemistry of Monte Epomeo Green Tuff, Ischia Island, South Italy: Constraints for Identification of the Y-7 Tephrostratigraphic Marker in Distal Sequences of the Central Mediterranean.

Rapid eruptive transitions from low to high intensity explosions and effusive activity: insights from textural analysis of a small-volume trachytic eruption, Ascension Island, South Atlantic (2021)
Journal Article
Davies, B. V., Brown, R. J., Barclay, J., Scarrow, J. H., & Herd, R. A. (2021). Rapid eruptive transitions from low to high intensity explosions and effusive activity: insights from textural analysis of a small-volume trachytic eruption, Ascension Island, South Atlantic. Bulletin of Volcanology, 83(9), Article 58. https://doi.org/10.1007/s00445-021-01480-1

Proximal deposits of small-volume trachytic eruptions are an under-studied record of eruption dynamics despite being common across a range of settings. The 59 ± 4 ka Echo Canyon deposits, Ascension Island, resulted from a small-volume explosive-effus... Read More about Rapid eruptive transitions from low to high intensity explosions and effusive activity: insights from textural analysis of a small-volume trachytic eruption, Ascension Island, South Atlantic.

Origins of olivine in Earth’s youngest kimberlite: Igwisi Hills volcanoes, Tanzania craton (2021)
Journal Article
Shaikh, A. M., Tappe, S., Bussweiler, Y., Vollmer, C., Brown, R. J., & EIMF. (2021). Origins of olivine in Earth’s youngest kimberlite: Igwisi Hills volcanoes, Tanzania craton. Contributions to Mineralogy and Petrology, 176(8), Article 62. https://doi.org/10.1007/s00410-021-01816-2

Monomineralic millimeter-sized olivine nodules are common in kimberlites worldwide. It is generally thought that such ‘dunitic nodules’ originate from the base of the cratonic lithosphere and that their formation marks the onset of deep-rooted kimber... Read More about Origins of olivine in Earth’s youngest kimberlite: Igwisi Hills volcanoes, Tanzania craton.

A model for permeability evolution during volcanic welding (2020)
Journal Article
Wadsworth, F. B., Vasseur, J., Llewellin, E. W., Brown, R. J., Tuffen, H., Gardner, J. E., …Marone, F. (2021). A model for permeability evolution during volcanic welding. Journal of Volcanology and Geothermal Research, 409, https://doi.org/10.1016/j.jvolgeores.2020.107118

Volcanic ash and pyroclasts can weld when deposited hot by pyroclastic density currents, in near-vent fall deposits, or in fractures in volcano interiors. Welding progressively decreases the permeability of the particle packs, influencing a range of... Read More about A model for permeability evolution during volcanic welding.

Deep and disturbed: conditions for formation and eruption of a mingled rhyolite at Ascension Island, south Atlantic (2020)
Journal Article
Chamberlain, K., Barclay, J., Preece, K., Brown, R., McIntosh, I., & EIMF. (2020). Deep and disturbed: conditions for formation and eruption of a mingled rhyolite at Ascension Island, south Atlantic. Volcanica, 3(1), 139-153. https://doi.org/10.30909/vol.03.01.139153

The generation of felsic melts (through open or closed system processes) within ocean island volcanoes has been a key area of study since their identification. At Ascension Island in the south Atlantic, explosively erupted felsic melts have, to date,... Read More about Deep and disturbed: conditions for formation and eruption of a mingled rhyolite at Ascension Island, south Atlantic.

Lower Crustal Heterogeneity and Fractional Crystallization Control Evolution of Small-volume Magma Batches at Ocean Island Volcanoes (Ascension Island, South Atlantic) (2019)
Journal Article
Chamberlain, K., Barclay, J., Preece, K., Brown, R., & Davidson, J. (2019). Lower Crustal Heterogeneity and Fractional Crystallization Control Evolution of Small-volume Magma Batches at Ocean Island Volcanoes (Ascension Island, South Atlantic). Journal of Petrology, 60(8), 1489-1522. https://doi.org/10.1093/petrology/egz037

Ocean island volcanoes erupt a wide range of magmatic compositions via a diverse range of eruptive styles. Understanding where and how these melts evolve is thus an essential component in the anticipation of future volcanic activity. Here we examine... Read More about Lower Crustal Heterogeneity and Fractional Crystallization Control Evolution of Small-volume Magma Batches at Ocean Island Volcanoes (Ascension Island, South Atlantic).

Diversity of soluble salt concentrations on volcanic ash aggregates from a variety of eruption types and deposits (2019)
Journal Article
Colombier, M., Mueller, S. B., Kueppers, U., Scheu, B., Delmelle, P., Cimarelli, C., …Dingwell, D. B. (2019). Diversity of soluble salt concentrations on volcanic ash aggregates from a variety of eruption types and deposits. Bulletin of Volcanology, 81(7), Article 39. https://doi.org/10.1007/s00445-019-1302-0

Ash aggregation is a common phenomenon in particle-laden environments of volcanic eruption plumes and pyroclastic density currents. Many of these initially fragile aggregates gain sufficient mechanical strength to remain intact after atmospheric tran... Read More about Diversity of soluble salt concentrations on volcanic ash aggregates from a variety of eruption types and deposits.

Evidence for a large-magnitude eruption from Campi Flegrei caldera (Italy) at 29 ka (2019)
Journal Article
Albert, P., Giaccio, B., Isaia, R., Costa, A., Niespolo, E., Pereira, A., …Smith, V. (2019). Evidence for a large-magnitude eruption from Campi Flegrei caldera (Italy) at 29 ka. Geology, 47(7), 595-599. https://doi.org/10.1130/g45805.1

The 40 ka caldera-forming eruption of Campi Flegrei (Italy) is the largest known eruption in Europe during the last 200 k.y., but little is known about other large eruptions at the volcano prior to a more recent caldera-forming event at 15 ka. At 29... Read More about Evidence for a large-magnitude eruption from Campi Flegrei caldera (Italy) at 29 ka.

Bridging the gap: 40Ar/39Ar dating of volcanic eruptions from the ‘Age of Discovery’ (2018)
Journal Article
Preece, K., Mark, D. F., Barclay, J., Cohen, B. E., Chamberlain, K. J., Jowitt, C., …Hamilton, S. (2018). Bridging the gap: 40Ar/39Ar dating of volcanic eruptions from the ‘Age of Discovery’. Geology, 46(12), 1035-1038. https://doi.org/10.1130/g45415.1

Many volcanoes worldwide still have poorly resolved eruption histories, with the date of the last eruption often undetermined. One such example is Ascension Island, where the timing of the last eruption, and consequently, the activity status of the v... Read More about Bridging the gap: 40Ar/39Ar dating of volcanic eruptions from the ‘Age of Discovery’.

Evaluating the link between the sulphur-rich Laacher See volcanic eruption and the Younger Dryas climate anomaly (2018)
Journal Article
Baldini, J. U., Brown, R. J., & Mawdsley, N. (2018). Evaluating the link between the sulphur-rich Laacher See volcanic eruption and the Younger Dryas climate anomaly. Climate of the Past, 14(7), 969-990. https://doi.org/10.5194/cp-14-969-2018

The Younger Dryas is considered the archetypal millennial-scale climate change event, and identifying its cause is fundamental for thoroughly understanding climate systematics during deglaciations. However, the mechanisms responsible for its initiati... Read More about Evaluating the link between the sulphur-rich Laacher See volcanic eruption and the Younger Dryas climate anomaly.

Sandstone Diagenesis in Sediment–lava Sequences: Exceptional Examples of Volcanically Driven Diagenetic Compartmentalization in Dune Valley, Huab Outliers, Nw Namibia (2017)
Journal Article
Grove, C., Jerram, D. A., Gluyas, J. G., & Brown, R. J. (2017). Sandstone Diagenesis in Sediment–lava Sequences: Exceptional Examples of Volcanically Driven Diagenetic Compartmentalization in Dune Valley, Huab Outliers, Nw Namibia. Journal of Sedimentary Research, 87(12), 1314-1335. https://doi.org/10.2110/jsr.2017.75

At the base of many flood basalt sequences and along volcanic rifted margins, volcanism can compete with the existing sedimentary environments, resulting in interbedded sequences of volcanic rocks and sediments. Here we report on sediment interlayers... Read More about Sandstone Diagenesis in Sediment–lava Sequences: Exceptional Examples of Volcanically Driven Diagenetic Compartmentalization in Dune Valley, Huab Outliers, Nw Namibia.

Igneous intrusions in the Faroe Shetland basin and their implications for hydrocarbon exploration; new insights from well and seismic data (2017)
Journal Article
Mark, N., Schofield, N., Pugliese, S., Watson, D., Holford, S., Muirhead, D., …Healy, D. (2018). Igneous intrusions in the Faroe Shetland basin and their implications for hydrocarbon exploration; new insights from well and seismic data. Marine and Petroleum Geology, 92, 733-753. https://doi.org/10.1016/j.marpetgeo.2017.12.005

Igneous sills and dykes that intrude pervasively into prospective sedimentary basins are a common occurrence in volcanic margins, impacting the petroleum system and causing geological and technical drilling challenges during hydrocarbon exploration.... Read More about Igneous intrusions in the Faroe Shetland basin and their implications for hydrocarbon exploration; new insights from well and seismic data.

Proximal lava drainage controls on basaltic fissure eruption dynamics (2017)
Journal Article
Jones, T., Llewellin, E., Houghton, B., Brown, R., & Vye-Brown, C. (2017). Proximal lava drainage controls on basaltic fissure eruption dynamics. Bulletin of Volcanology, 79(11), Article 81. https://doi.org/10.1007/s00445-017-1164-2

Hawaiian basaltic eruptions commonly initiate as a fissure, producing fountains, spattering, and clastogenic lava flows. Most fissures rapidly localize to form a small number of eruptive vents, the location of which may influence the subsequent distr... Read More about Proximal lava drainage controls on basaltic fissure eruption dynamics.

The architecture of submarine monogenetic volcanoes – insights from 3D seismic data (2017)
Journal Article
Reynolds, P., Schofield, N., Brown, R., & Holford, S. (2018). The architecture of submarine monogenetic volcanoes – insights from 3D seismic data. Basin Research, 30(s1), 437-451. https://doi.org/10.1111/bre.12230

Many prospective sedimentary basins contain a variety of extrusive volcanic products that are ultimately sourced from volcanoes. However, seismic reflection-based studies of magmatic rift basins have tended to focus on the underlying magma plumbing s... Read More about The architecture of submarine monogenetic volcanoes – insights from 3D seismic data.

The 2013 eruption of Chaparrastique volcano (El Salvador): Effects of magma storage, mixing, and decompression (2016)
Journal Article
Scarlato, P., Mollo, S., Del Bello, E., von Quadt, A., Brown, R., Gutierrez, E., …Papale, P. (2017). The 2013 eruption of Chaparrastique volcano (El Salvador): Effects of magma storage, mixing, and decompression. Chemical Geology, 448, 110-122. https://doi.org/10.1016/j.chemgeo.2016.11.015

On December 29, 2013, an isolated vulcanian-type eruption occurred at Chaparrastique volcano (El Salvador) after 12 years of inactivity. The eruption was classified as VEI 2 and produced an ash plume with a maximum height of ~ 9 km. Textural and comp... Read More about The 2013 eruption of Chaparrastique volcano (El Salvador): Effects of magma storage, mixing, and decompression.

Origin and evolution of silicic magmas at ocean islands: Perspectives from a zoned fall deposit on Ascension Island, South Atlantic (2016)
Journal Article
Chamberlain, K., Barclay, J., Preece, K., Brown, R., Davidson, J., & EIMF. (2016). Origin and evolution of silicic magmas at ocean islands: Perspectives from a zoned fall deposit on Ascension Island, South Atlantic. Journal of Volcanology and Geothermal Research, 327, 349-360. https://doi.org/10.1016/j.jvolgeores.2016.08.014

Ascension Island, in the south Atlantic is a composite ocean island volcano with a wide variety of eruptive styles and magmatic compositions evident in its ~ 1 million year subaerial history. In this paper, new observations of a unique zoned fall dep... Read More about Origin and evolution of silicic magmas at ocean islands: Perspectives from a zoned fall deposit on Ascension Island, South Atlantic.

Ash Aggregation in Volcanic Clouds (2016)
Book Chapter
Durant, A., & Brown, R. (in press). Ash Aggregation in Volcanic Clouds. In S. Mackie, K. Cashman, H. Ricketts, A. Rust, & M. Watson (Eds.), Volcanic Ash (53-66). Elsevier

The architecture and shallow conduits of Laki-type pyroclastic cones: insights into a basaltic fissure eruption (2016)
Journal Article
Reynolds, P., Brown, R., Thordarson, T., & Llewellin, E. (2016). The architecture and shallow conduits of Laki-type pyroclastic cones: insights into a basaltic fissure eruption. Bulletin of Volcanology, 78(5), Article 36. https://doi.org/10.1007/s00445-016-1029-0

Pyroclastic cones built along basaltic fissures provide important volcanological information, but it is often difficult to examine the early-erupted products due to burial by later products. Furthermore, it is rare to see the link between the feeder... Read More about The architecture and shallow conduits of Laki-type pyroclastic cones: insights into a basaltic fissure eruption.

Reconstructing the evolution of an eroded Miocene caldera volcano (Yamanlar volcano, İzmir, Turkey) (2016)
Journal Article
Karaoğlu, O., & Brown, R. (2016). Reconstructing the evolution of an eroded Miocene caldera volcano (Yamanlar volcano, İzmir, Turkey). Journal of Volcanology and Geothermal Research, 318, 1-18. https://doi.org/10.1016/j.jvolgeores.2016.03.007

The Miocene Yamanlar composite volcano is located in the central part of a shear zone in western Turkey. The volcano's deeply-eroded interior provides excellent three-dimensional exposure of a faulted caldera-floor and caldera-fill rocks as well as s... Read More about Reconstructing the evolution of an eroded Miocene caldera volcano (Yamanlar volcano, İzmir, Turkey).

Was millennial scale climate change during the Last Glacial triggered by explosive volcanism? (2015)
Journal Article
Baldini, J., Brown, R., & McElwaine, J. (2015). Was millennial scale climate change during the Last Glacial triggered by explosive volcanism?. Scientific Reports, 5, Article 17442. https://doi.org/10.1038/srep17442

The mechanisms responsible for millennial scale climate change within glacial time intervals are equivocal. Here we show that all eight known radiometrically-dated Tambora-sized or larger NH eruptions over the interval 30 to 80 ka BP are associated w... Read More about Was millennial scale climate change during the Last Glacial triggered by explosive volcanism?.

Disruption of Tephra Fall Deposits Caused by Lava Flows during Basaltic Eruptions (2015)
Journal Article
Brown, R., Thordarson, T., Self, S., & Blake, S. (2015). Disruption of Tephra Fall Deposits Caused by Lava Flows during Basaltic Eruptions. Bulletin of Volcanology, 77(10), Article 90. https://doi.org/10.1007/s00445-015-0974-3

Observations in the USA, Iceland and Tenerife, Canary Islands reveal how processes occurring during basaltic eruptions can result in complex physical and stratigraphic relationships between lava and proximal tephra fall deposits around vents. Observa... Read More about Disruption of Tephra Fall Deposits Caused by Lava Flows during Basaltic Eruptions.

Rootless cone eruption processes informed by dissected tephra deposits and conduits (2015)
Journal Article
Reynolds, P., Brown, R., Thordarson, T., Llewellin, E., & Fielding, K. (2015). Rootless cone eruption processes informed by dissected tephra deposits and conduits. Bulletin of Volcanology, 77(9), Article 72. https://doi.org/10.1007/s00445-015-0958-3

Rootless cones result from the explosive interaction between lava flows and underlying water-saturated sediment or volcaniclastic deposits. Rootless explosions can represent a significant far-field hazard during basaltic eruptions, but there are few... Read More about Rootless cone eruption processes informed by dissected tephra deposits and conduits.

Petrology, geochemistry and low-temperature alteration of lavas and pyroclastic rocks of the kimberlitic Igwisi Hills volcanoes, Tanzania. (2015)
Journal Article
Willcox, A., Buisman, I., Sparks, R., Brown, R., Manya, S., Schumacher, J., & Tuffen, H. (2015). Petrology, geochemistry and low-temperature alteration of lavas and pyroclastic rocks of the kimberlitic Igwisi Hills volcanoes, Tanzania. Chemical Geology, 405, 82-101. https://doi.org/10.1016/j.chemgeo.2015.04.012

Geochemical data are presented for the kimberlitic Holocene Igwisi Hills volcanoes (IHV), Tanzania, which preserve extra-crater lavas and pyroclastic rocks. Their young age and exceptional preservation enable investigation of kimberlite magma composi... Read More about Petrology, geochemistry and low-temperature alteration of lavas and pyroclastic rocks of the kimberlitic Igwisi Hills volcanoes, Tanzania..

Using formation micro-imaging, wireline logs and onshore analogues to distinguish volcanic lithofacies in boreholes: examples from Palaeogene successions in the Faroe–Shetland Basin, NE Atlantic (2014)
Journal Article
Watton, T., Cannon, S., Brown, R., Jerram, D., & Waichel, B. (2014). Using formation micro-imaging, wireline logs and onshore analogues to distinguish volcanic lithofacies in boreholes: examples from Palaeogene successions in the Faroe–Shetland Basin, NE Atlantic. Geological Society Special Publications, 397, 173-192. https://doi.org/10.1144/sp397.7

Age and geochemistry of tephra layers from Ischia, Italy: constraints from proximal-distal correlations with Lago Grande di Monticchio (2014)
Journal Article
Tomlinson, E., Albert, P., Wulf, S., Brown, R., Smith, V., Keller, J., …Menzies, M. (2014). Age and geochemistry of tephra layers from Ischia, Italy: constraints from proximal-distal correlations with Lago Grande di Monticchio. Journal of Volcanology and Geothermal Research, 287, 22-39. https://doi.org/10.1016/j.jvolgeores.2014.09.006

Unraveling the eruptive history of the Island of Ischia (southern Italy) is problematic due to its burial, caldera collapse, resurgent uplift and erosion. Here, we present new major and trace element glass data for 39–75 ka proximal tephra deposits,... Read More about Age and geochemistry of tephra layers from Ischia, Italy: constraints from proximal-distal correlations with Lago Grande di Monticchio.

Geochemical and isotopic insights into the assembly, evolution and disruption of a magmatic plumbing system before and after a cataclysmic caldera-collapse eruption at Ischia volcano (Italy) (2014)
Journal Article
Brown, R., Civetta, L., Arienzo, I., D'Antonio, M., Moretti, R., Orsi, G., …Menzies, M. (2014). Geochemical and isotopic insights into the assembly, evolution and disruption of a magmatic plumbing system before and after a cataclysmic caldera-collapse eruption at Ischia volcano (Italy). Contributions to Mineralogy and Petrology, 168(3), Article 1035. https://doi.org/10.1007/s00410-014-1035-1

New geochemical and isotopic data on volcanic rocks spanning the period ~75–50 ka BP on Ischia volcano, Italy, shed light on the evolution of the magmatic system before and after the catastrophic, caldera-forming Monte Epomeo Green Tuff (MEGT) erupti... Read More about Geochemical and isotopic insights into the assembly, evolution and disruption of a magmatic plumbing system before and after a cataclysmic caldera-collapse eruption at Ischia volcano (Italy).

Morphology and surface features of olivine in kimberlite: implications for ascent processes (2014)
Journal Article
Jones, T., Russell, J., Porritt, L., & Brown, R. (2014). Morphology and surface features of olivine in kimberlite: implications for ascent processes. Solid Earth, 5(1), 313-326. https://doi.org/10.5194/se-5-313-2014

Most kimberlite rocks contain large proportions of ellipsoidal-shaped xenocrystic olivine grains that are derived mainly from disaggregation of peridotite. Here, we describe the shapes, sizes and surfaces of olivine grains recovered from kimberlite l... Read More about Morphology and surface features of olivine in kimberlite: implications for ascent processes.

The petrophysical and petrographical properties of hyaloclastite deposits: Implications for petroleum exploration (2014)
Journal Article
for petroleum exploration. AAPG Bulletin, 98(3), 449-463. https://doi.org/10.1306/08141313029

Offshore sequences of volcaniclastic rocks (such as hyaloclastite deposits) are poorly understood in terms of their rock properties and their response to compaction and burial. As petroleum exploration targets offshore volcanic rifted margins worldwi... Read More about The petrophysical and petrographical properties of hyaloclastite deposits: Implications for petroleum exploration.

Pyroclastic edifices record vigorous lava fountains during the emplacement of a flood basalt flow field, Roza Member, Columbia River Basalt Province, USA (2014)
Journal Article
Brown, R., Blake, S., Thordarson, T., & Self, S. (2014). Pyroclastic edifices record vigorous lava fountains during the emplacement of a flood basalt flow field, Roza Member, Columbia River Basalt Province, USA. GSA Bulletin, 126(7-8), 875-891. https://doi.org/10.1130/b30857.1

The 1300 km3 tholeiitic lava flow field of the 14.98 Ma Roza Member of the Columbia River Basalt Province has the best-preserved vent system of any known continental flood basalt. Detailed geological mapping and logging of the exposed pyroclastic roc... Read More about Pyroclastic edifices record vigorous lava fountains during the emplacement of a flood basalt flow field, Roza Member, Columbia River Basalt Province, USA.

Internal flow variations and diachronous sedimentation within extensive, sustained, density-stratified pyroclastic density currents flowing down gentle slopes, as revealed by the internal architectures of ignimbrites on Tenerife (2013)
Journal Article
Brown, R., & Branney, M. (2013). Internal flow variations and diachronous sedimentation within extensive, sustained, density-stratified pyroclastic density currents flowing down gentle slopes, as revealed by the internal architectures of ignimbrites on Tenerife. Bulletin of Volcanology, 75(7), https://doi.org/10.1007/s00445-013-0727-0

During a protracted explosive eruption, at least four laterally extensive and sustained pyroclastic density currents radiated across the flanks of Las Cañadas volcano, Tenerife. Each pyroclastic current developed marked local and regional spatial var... Read More about Internal flow variations and diachronous sedimentation within extensive, sustained, density-stratified pyroclastic density currents flowing down gentle slopes, as revealed by the internal architectures of ignimbrites on Tenerife.

Physical characteristics of kimberlite and basaltic intraplate volcanism and implications of a biased kimberlite record (2013)
Journal Article
Brown, R., & Valentine, G. (2013). Physical characteristics of kimberlite and basaltic intraplate volcanism and implications of a biased kimberlite record. GSA Bulletin, 125(7-8), 1224-1238. https://doi.org/10.1130/b30749.1

We assess bias in the record of kimberlite volcanism by using newly acquired size data on more than 900 kimberlite bodies from 12 kimberlite fields eroded to depths of between 0 m and >1200 m, and by a comparison with intraplate monogenetic basaltic... Read More about Physical characteristics of kimberlite and basaltic intraplate volcanism and implications of a biased kimberlite record.

The formation of columnar joints produced by cooling in basalt at Staffa, Scotland (2013)
Journal Article
Phillips, J., Humphreys, M., Daniels, K., Brown, R., & Witham, F. (2013). The formation of columnar joints produced by cooling in basalt at Staffa, Scotland. Bulletin of Volcanology, 75(6), Article 715. https://doi.org/10.1007/s00445-013-0715-4

Columnar jointing in basaltic lava flows on the island of Staffa, NW Scotland, was studied using a combination of field mapping and measurement of column dimensions, sample petrology and measurements of plagioclase crystal size distributions (CSDs) i... Read More about The formation of columnar joints produced by cooling in basalt at Staffa, Scotland.

Eruption of kimberlite magmas: physical volcanology, geomorphology and age of the youngest kimberlitic volcanoes known on earth (the Upper Pleistocene/ Holocene Igwisi Hills volcanoes, Tanzania) (2012)
Journal Article
Brown, R., Manya, S., Buisman, I., Fontana, G., Field, M., Niocaill, C., …Stuart, F. (2012). Eruption of kimberlite magmas: physical volcanology, geomorphology and age of the youngest kimberlitic volcanoes known on earth (the Upper Pleistocene/ Holocene Igwisi Hills volcanoes, Tanzania). Bulletin of Volcanology, 74(7), 1621-1643. https://doi.org/10.1007/s00445-012-0619-8

The Igwisi Hills volcanoes (IHV), Tanzania, are unique and important in preserving extra-crater lavas and pyroclastic edifices. They provide critical insights into the eruptive behaviour of kimberlite magmas that are not available at other known kimb... Read More about Eruption of kimberlite magmas: physical volcanology, geomorphology and age of the youngest kimberlitic volcanoes known on earth (the Upper Pleistocene/ Holocene Igwisi Hills volcanoes, Tanzania).

The origin of pelletal lapilli in explosive kimberlite eruptions (2012)
Journal Article
Gernon, T., Brown, R., Tait, M., & Hincks, T. (2012). The origin of pelletal lapilli in explosive kimberlite eruptions. Nature Communications, 3, Article 832. https://doi.org/10.1038/ncomms1842

Kimberlites are volatile-rich magmas from mantle depths of ≥150 km and are the primary source of diamonds. Kimberlite volcanism involves the formation of diverging pipes or diatremes, which are the locus of high-intensity explosive eruptions. A consp... Read More about The origin of pelletal lapilli in explosive kimberlite eruptions.

́Áā lava flows in the Deccan Volcanic Province, India, and their significance for the nature of continental flood basalt eruptions (2011)
Journal Article
Brown, R., Blake, S., Bondre, N., Phadnis, V., & Self, S. (2011). ́Áā lava flows in the Deccan Volcanic Province, India, and their significance for the nature of continental flood basalt eruptions. Bulletin of Volcanology, 73(6), 737-752. https://doi.org/10.1007/s00445-011-0450-7

Newly identified ´a´ā lava flows outcrop intermittently over an area of ~110 km2 in the western Deccan Volcanic Province (DVP), India. They occur in the upper Thakurvadi Formation in the region south of Sangamner. The flows, one of which is compound,... Read More about ́Áā lava flows in the Deccan Volcanic Province, India, and their significance for the nature of continental flood basalt eruptions.

Emplacement temperatures of pyroclastic and volcaniclastic deposits in kimberlite pipes in southern Africa (2011)
Journal Article
Fontana, G., Mac Nio Caill, C., Brown, R., Sparks, R., & Field, M. (2011). Emplacement temperatures of pyroclastic and volcaniclastic deposits in kimberlite pipes in southern Africa. Bulletin of Volcanology, 73(8), 1063-1083. https://doi.org/10.1007/s00445-011-0493-9

Palaeomagnetic techniques for estimating the emplacement temperatures of volcanic deposits have been applied to pyroclastic and volcaniclastic deposits in kimberlite pipes in southern Africa. Lithic clasts were sampled from a variety of lithofacies f... Read More about Emplacement temperatures of pyroclastic and volcaniclastic deposits in kimberlite pipes in southern Africa.

Impactoclastic density current emplacement of terrestrial meteorite-impact ejecta and the formation of dust pellets and accretionary lapilli: Evidence from Stac Fada, Scotland (2011)
Journal Article
Branney, M., & Brown, R. (2011). Impactoclastic density current emplacement of terrestrial meteorite-impact ejecta and the formation of dust pellets and accretionary lapilli: Evidence from Stac Fada, Scotland. The Journal of Geology, 119(3), 275-292. https://doi.org/10.1086/659147

We present an impactoclastic density current model for terrestrial meteorite impact ejecta emplacement that is based on a hitherto-unreported threefold sequence of lithofacies in the recently identified Stac Fada impact ejecta outflow blanket in Scot... Read More about Impactoclastic density current emplacement of terrestrial meteorite-impact ejecta and the formation of dust pellets and accretionary lapilli: Evidence from Stac Fada, Scotland.

3D crystal size distributions: A case study on quantifying olivine populations in kimberlites (2009)
Journal Article
Jerram, D. A., Mock, A., Davis, G. R., Field, M., & Brown, R. J. (2009). 3D crystal size distributions: A case study on quantifying olivine populations in kimberlites. Lithos, 112(Supplement 1 ; Part 1), 223-235. https://doi.org/10.1016/j.lithos.2009.05.042

New advances in textural analysis and imaging allow the possibility for the true distribution of mineral phases in a rock to be quantified to high resolution. Also we are able to explore the relations between 2D to 3D datasets more rigorously. In thi... Read More about 3D crystal size distributions: A case study on quantifying olivine populations in kimberlites.

Problems with an in-vent column collapse model for the emplacement of massive volcaniclastic kimberlite. A discussion of 'In-vent column collapse as an alternative model for massive volcaniclastic kimberlite emplacement: An example from the Fox kimberlite, Ekati Diamond Mine, NWT, Canada' by Porritt et al. [J. Volcanol. Geotherm. Res. 174, 90-102] (2008)
Journal Article
Brown, R., Field, M., Gernon, T., Gilbertson, M., & Sparks, R. (2008). Problems with an in-vent column collapse model for the emplacement of massive volcaniclastic kimberlite. A discussion of 'In-vent column collapse as an alternative model for massive volcaniclastic kimberlite emplacement: An example from the Fox kimberlite, Ekati Diamond Mine, NWT, Canada' by Porritt et al. [J. Volcanol. Geotherm. Res. 174, 90-102]. Journal of Volcanology and Geothermal Research, 178(4), 847-850. https://doi.org/10.1016/j.jvolgeores.2008.06.002

The Formation of Diamonds (2008)
Book Chapter
Brown, R. (2008). The Formation of Diamonds. In M. Benton (Ed.), The Seventy Great Mysteries of the Natural World. Thames-Hudson