Outputs (10)

New constraints on electron-beam induced halogen migration in apatite (2014)
Journal Article
Stock, M., Humphreys, M., Smith, V., Johnson, R., Pyle, D., & EIMF. (2015). New constraints on electron-beam induced halogen migration in apatite. American Mineralogist, 100(1), 281-293. https://doi.org/10.2138/am-2015-4949

Fluorine and chlorine X-ray count rates are known to vary significantly during electron probe microanalysis (EPMA) of apatite. Since the rate, timing, and magnitude of this variation are a function of apatite orientation and composition, as well as E... Read More about New constraints on electron-beam induced halogen migration in apatite.

Magnetite-bubble aggregates at mixing interfaces in andesite magma bodies (2014)
Journal Article
Edmonds, M., Brett, A., Herd, R., Humphreys, M., & Woods, A. (2015). Magnetite-bubble aggregates at mixing interfaces in andesite magma bodies. Geological Society Special Publications, 410(1), 95-121. https://doi.org/10.1144/sp410.7

Magnetite is a particularly favourable site for heterogeneous bubble nucleation in magma and yet only very rarely is evidence for this preserved due to the myriad of processes that act to overprint such an association. The possibility of bubble-magne... Read More about Magnetite-bubble aggregates at mixing interfaces in andesite magma bodies.

Contact metamorphism of Precambrian gneiss by the Skaergaard Intrusion (2014)
Journal Article
Bufe, N. A., Holness, M. B., & Humphreys, M. C. (2014). Contact metamorphism of Precambrian gneiss by the Skaergaard Intrusion. Journal of Petrology, 55(8), 1595-1617. https://doi.org/10.1093/petrology/egu035

The Tertiary Skaergaard intrusion, East Greenland, intruded at the shallow crustal unconformity between Precambrian amphibolite-facies gneisses and overlying Tertiary Plateau Basalts. Maximum contact metamorphic temperatures in quartzo-feldspathic gn... Read More about Contact metamorphism of Precambrian gneiss by the Skaergaard Intrusion.

Crystallization of interstitial liquid and latent heat buffering in solidifying gabbros: Skaergaard Intrusion, Greenland (2014)
Journal Article
Namur, O., Humphreys, M. C., & Holness, M. B. (2014). Crystallization of interstitial liquid and latent heat buffering in solidifying gabbros: Skaergaard Intrusion, Greenland. Journal of Petrology, 55(7), 1389-1427. https://doi.org/10.1093/petrology/egu028

New compositional profiles across plagioclase grains from the Layered Series (LS), Marginal Border Series (MBS) and Upper Border Series (UBS) of the Skaergaard intrusion are used to understand the mechanisms of cumulate rock solidification and the fa... Read More about Crystallization of interstitial liquid and latent heat buffering in solidifying gabbros: Skaergaard Intrusion, Greenland.

Distribution of dissolved water in magmatic glass records growth and resorption of bubbles (2014)
Journal Article
McIntosh, I., Llewellin, E., Humphreys, M., Nichols, A., Burgisser, A., Schipper, C., & Larsen, J. (2014). Distribution of dissolved water in magmatic glass records growth and resorption of bubbles. Earth and Planetary Science Letters, 401, 1-11. https://doi.org/10.1016/j.epsl.2014.05.037

Volcanic eruptions are driven by the growth of gas bubbles in magma. Bubbles grow when dissolved volatile species, principally water, diffuse through the silicate melt and exsolve at the bubble wall. On rapid cooling, the melt quenches to glass, pres... Read More about Distribution of dissolved water in magmatic glass records growth and resorption of bubbles.

Characterization of mafic enclaves in the erupted products of Soufrière Hills Volcano, Montserrat, 2009 to 2010 (2014)
Book Chapter
Plail, M., Barclay, J., Humphreys, M., Edmonds, M., Herd, R., & Christopher, T. (2014). Characterization of mafic enclaves in the erupted products of Soufrière Hills Volcano, Montserrat, 2009 to 2010. In G. Wadge, R. Robertson, & B. Voight (Eds.), The eruption of Soufrière Hills Volcano, Montserrat from 2000 to 2010 (343-360). The Geological Society. https://doi.org/10.1144/m39.18

Lavas from the current eruption of the Soufrière Hills Volcano, Montserrat exhibit evidence for magma mingling, related to the intrusion of mafic magma at depth. We present detailed field, petrological, textural and geochemical descriptions of mafic... Read More about Characterization of mafic enclaves in the erupted products of Soufrière Hills Volcano, Montserrat, 2009 to 2010.

Petrological and geochemical variation during the Soufrière Hills eruption, 1995 to 2010 (2014)
Book Chapter
Christopher, T., Humphreys, M., Barclay, J., Genareau, K., De Angelis, S., Plail, M., & Donovan, A. (2014). Petrological and geochemical variation during the Soufrière Hills eruption, 1995 to 2010. In G. Wadge, R. Robertson, & B. Voight (Eds.), The Eruption of Soufrière Hills Volcano, Montserrat from 2000 to 2010 (317-342). The Geological Society. https://doi.org/10.1144/m39.17

The andesite lava erupted at the Soufrière Hills Volcano (SHV) is crystal-rich with 33–63% phenocrysts of plagioclase (65%), amphibole (28%), orthopyroxene (7%), and minor Fe–Ti oxide and clinopyroxene microphenocrysts. The andesite hosts mafic encla... Read More about Petrological and geochemical variation during the Soufrière Hills eruption, 1995 to 2010.

Pre-eruptive vapour and its role in controlling eruption style and longevity at Soufriere Hills Volcano (2014)
Book Chapter
Edmonds, M., Humphreys, M., Hauri, E., Herd, R., Wadge, G., Rawson, H., …Guida, R. (2014). Pre-eruptive vapour and its role in controlling eruption style and longevity at Soufriere Hills Volcano. In G. Wadge, R. Robertson, & B. Voight (Eds.), The eruption of Soufrière Hills Volcano, Montserrat from 2000 to 2010 (291-315). The Geological Society. https://doi.org/10.1144/m39.16

We use volatiles in melt inclusions and nominally anhydrous phenocrysts, with volcanic gas flux and composition, and textural analysis of mafic inclusions to estimate the mass of exsolved vapour prior to eruption at Soufrière Hills Volcano (SHV). Pre... Read More about Pre-eruptive vapour and its role in controlling eruption style and longevity at Soufriere Hills Volcano.

Geochemical evidence for relict degassing pathways preserved in andesite (2014)
Journal Article
Plail, M., Edmonds, M., Humphreys, M., Barclay, J., & Herd, R. (2014). Geochemical evidence for relict degassing pathways preserved in andesite. Earth and Planetary Science Letters, 386, 21-33. https://doi.org/10.1016/j.epsl.2013.10.044

Andesitic arc volcanoes degas large quantities of volatiles; evidence for vapour transport in the erupted lavas is rarely preserved and poorly understood, but is crucial for understanding eruption style. We present geochemical evidence for the transp... Read More about Geochemical evidence for relict degassing pathways preserved in andesite.

Oxidised phase relations of a primitive basalt from Grenada, Lesser Antilles (2014)
Journal Article
Stamper, C., Melekhova, E., Blundy, J., Arculus, R., Humphreys, M., & Brooker, R. (2014). Oxidised phase relations of a primitive basalt from Grenada, Lesser Antilles. Contributions to Mineralogy and Petrology, 167(1), https://doi.org/10.1007/s00410-013-0954-6

A series of liquidus determinations is reported for a primitive arc basalt (15.4 wt % MgO, 45.5 wt % SiO2) from Grenada, Lesser Antilles, at anhydrous, H2O-undersaturated and H2O-saturated conditions in the pressure range 1 atm to 1.7 GPa. Fe3+/ΣFeFe... Read More about Oxidised phase relations of a primitive basalt from Grenada, Lesser Antilles.