Results 61 to 70 of about 6,694 (263)

Further evidence for early lunar magnetism from troctolite 76535 [PDF]

, 2017
The earliest history of the lunar dynamo is largely unknown and has important implications for the thermal state of the Moon and the physics of dynamo generation.
Garrick-Bethell, Ian, Shuster, David L., Tikoo, Sonia M., Tremblay, Marissa M., Weiss, Benjamin P.   +4 more
core   +1 more source

Recycling Argon through Metamorphic Reactions: the Record in Symplectites [PDF]

, 2018
The 40Ar/39Ar ages of metamorphic micas that crystallized at high temperatures are commonly interpreted as cooling ages, with grains considered to have lost 40Ar via thermally-driven diffusion into the grain boundary network.
Allaz, Anderson, Anderson, Baxter, Beltrando, Berry, Blundy, Bryhni, Christopher S. McDonald, Clare J. Warren, Connolly, Cuthbert, Dale, Daniele Regis, de Sigoyer, Di Vincenzo, Dodson, Dransfield, Engvik, Eskola, Frost, Fuhrman, Gee, Gilotti, Godard, Groppo, Hacker, Hacker, Hacker, Hacker, Heinrich, Holland, Holland, Holland, Holland, Holland, Holland, Johnson, Kellett, Krogh, Kylander-Clark, Kylander-Clark, Labrousse, Li, Li, Lux, McDonald, Mulch, Peterman, Putlitz, Renne, Roberts, Root, Root, Sarah C. Sherlock, Schmidt, Schärer, Sherlock, Simon P. Kelley, Smith, Spencer, Tajcmanová, Terry, Terry, Tucker, Villa, Villa, Wain, Wain, Walsh, Walsh, Walsh, Warren, Warren, Warren, Watson, Wheeler, White, White, Whitney, Young, Young, Young   +82 more
core   +2 more sources

Magma Plumbing During the 2014–2015 Eruption of Fogo (Cape Verde Islands)

Frontiers in Earth Science, 2020
Phenocrysts in volcanic rocks are recorders of magmatic processes that have occurred at depth before and during a volcanic eruption. Our petrological investigations of stratigraphically controlled tephrite and phonotephrite samples from the latest ...
Andreas Klügel, Simon Day, Markus Schmid, Bruno Faria   +3 more
doaj   +1 more source

Petrography, geochemistry and mineral chemistry of the Almogholagh intrusive rocks (Hamedan, Iran): Evidences for their shallow-level emplacement [PDF]

پترولوژی, 2018
The Almogholagh plutonic body with about 10 km2 is located 15 km of West of Hamedan city and on the Sanandaj-Sirjan zone. The Almogholagh pluton consists of diorite and gabbroic diorite, monzodiorite, quartz monzodiorite, monzonite, quartz monzonite ...
Hossein Shahbazi, Amin Bahmanpour, Mohammad Nour Mohammadi, Ali Dehdar, Farhad Aliani, Ashraf Tourkian, Leyli Izadi Kilan   +6 more
doaj   +1 more source

Late Cretaceous to Paleocene Metamorphism and Magmatism in the Funeral Mountains Metamorphic Core Complex, Death Valley, California [PDF]

, 2007
Amphibolite-facies Proterozoic metasedimentary rocks below the low-angle Cenozoic Boundary Canyon Detachment record deep crustal processes related to Mesozoic crustal thickening and subsequent extension.
Colgan, Joseph P., Mattinson, Chris G., Metcalf, James R., Miller, Elizabeth L., Wooden, Joseph L.   +4 more
core   +2 more sources

Rapid onset of mafic magmatism facilitated by volcanic edifice collapse [PDF]

, 2015
Volcanic edifice collapses generate some of Earth's largest landslides. How such unloading affects the magma storage systems is important for both hazard assessment and for determining long-term controls on volcano growth and decay.
A. Fujinawa, A. Le Friant, A. Michalik, Armienti, Blundy, Boudon, C. Breitkreuz, Cassidy, Cassidy, Cassidy, Cassidy, D. Endo, D. Wall-Palmer, Davidson, E. Inglis, Erdmann, F. Maeno, F. Wang, G. Boudon, Gee, Gudmundsson, Harford, Hildreth, Hora, Horwell, Humphreys, K. S. Kataoka, Le Friant, Le Friant, M. C. McCanta, M. Cassidy, M. Coussens, M. Edmonds, M. J. Hornbach, M. Jutzeler, M. Manga, M. R. Palmer, Manconi, Manga, Metrich, O. Ishizuka, P. J. Talling, Pinel, Pinel, Pinel, Presley, Putirka, Putirka, R. N. Taylor, Ridolfi, S. F. L. Watt, S. L. Colas, Sevilla, Smith, T. Adachi, T. Gernon, Trofimovs, Wadge, Watt, Y. Tamura, Zellmer   +60 more
core   +5 more sources

Evidence for a reducing Archean ambient mantle and its effects on the carbon cycle [PDF]

, 2016
Chemical reduction-oxidation mechanisms within mantle rocks link to the terrestrial carbon cycle by influencing the depth at which magmas can form, their composition, and ultimately the chemistry of gases released into the atmosphere.
Aulbach, Sonja, Stagno, Vincenzo
core   +1 more source

Garnet Chemical Zoning Based Thermobarometry: Method Evaluation and Applications in the Menderes Massif, Western Turkey

Geosciences, 2021
The garnet chemical zoning method (GZM) is a reliable thermodynamic approach for forward modeling pressure-temperature (P-T) paths using observed garnet and bulk rock compositions.
Thomas M. Etzel, Elizabeth J. Catlos
doaj   +1 more source

Thermobarometric constraints on the depth of exposure and conditions of plutonism and metamorphism at deep levels of the Sierra Nevada Batholith, Tehachapi Mountains, California [PDF]

, 1993
We present thermodynamic estimates of pressures, temperatures, and volatile activities in variably deformed, gabbroic to granitic, Cretaceous (115–100 Ma) batholithic and framework rocks of the Tehachapi Mountains, southernmost Sierra Nevada, California.
Pickett, David A., Saleeby, Jason B.
core   +1 more source

Deciphering the pressure‒temperature path in low-grade metamorphic rocks by combining crystal chemistry, thermobarometry and thermodynamic modelling: an example in the Marguareis Massif, Western Ligurian Alps, Italy

Mineralogical magazine
Unveiling the pressure‒temperature path of low-grade metamorphic rocks is challenging because of the occurrence of detrital minerals and high-variance mineral assemblages (i.e. chlorite–white mica–quartz).
E. Sanità, M. Di Rosa, J. Lardeaux, M. Marroni, M. Tamponi, M. Lezzerini, L. Pandolfi   +6 more
semanticscholar   +1 more source