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Dr Richard Brown's Outputs (74)

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.

A review of volcanic ash aggregation (2012)
Journal Article
Brown, R., Bonadonna, C., & Durant, A. (2012). A review of volcanic ash aggregation. Physics and Chemistry of the Earth, Parts A/B/C, 45-46, 65-78. https://doi.org/10.1016/j.pce.2011.11.001

Most volcanic ash particles with diameters <63 μm settle from eruption clouds as particle aggregates that cumulatively have larger sizes, lower densities, and higher terminal fall velocities than individual constituent particles. Particle aggregation...

́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.