Results 81 to 90 of about 5,319 (257)

Metasomatism and Mélange Development at the Conditions of Modern Deep Slow Slip: P‐T‐t Evolution of Metasomatic Rocks (Pimu'nga/Santa Catalina Island, CA)

Geochemistry, Geophysics, Geosystems, Volume 26, Issue 10, October 2025.
Abstract The subduction interface hosts megathrust earthquakes and ductile creep, is fluid‐rich and chemically dynamic, and produces metasomatic rocks that may host episodic tremor and slow slip (ETS). However, determining the depths at which these metasomatic rocks form and deform remains challenging.
W. Hoover, C. B. Condit, A. Moser, S. Mulcahy, P. C. Lindquist, V. E. Guevara   +5 more
wiley   +1 more source

Ultramafic xenoliths from the Bearpaw Mountains, Montana, USA: evidence for multiple metasomatic events in the lithospheric mantle beneath the Wyoming craton [PDF]

, 2004
Ultramafic xenoliths in Eocene minettes of the Bearpaw Mountains volcanic field (Montana, USA), derived from the lower lithosphere of the Wyoming craton, can be divided based on textural criteria into tectonite and cumulate groups. The tectonites consist
Abidin, M.S.Z., Codemard, C.A., Dupriez, P., Farrell, C., Jeong, Y., Ji, J., Maran, J.-N., Nilsson, J., Payne, D.N., Richardson, D.J., Sahu, J.K., Yoo, S.   +11 more
core   +2 more sources

Expansion and Contraction of the Patagonian Ice Sheet and Its Influence on Magma Storage Beneath Mocho‐Choshuenco Volcano, Chile

Journal of Geophysical Research: Solid Earth, Volume 130, Issue 10, October 2025.
Abstract Glacial loading and unloading could impact eruptive outputs at mid‐ to high‐latitude arc volcanoes, yet the influence on magma storage conditions remains poorly understood. Mocho‐Choshuenco volcano in the Andean Southern Volcanic Zone has been impacted by the advance and retreat of the Patagonian ice sheet (PIS).
Pablo Moreno‐Yaeger, Brad S. Singer, Brent V. Alloway, Meredith Townsend, Joshua Cuzzone, William O. Nachlas, Benjamin R. Edwards, Brian R. Jicha, Shaun A. Marcott, Felix O. Boschetty   +9 more
wiley   +1 more source

Picroilmenites in Yakutian kimberlites: variations and genetic models [PDF]

Solid Earth, 2014
Major and trace element variations in picroilmenites from Late Devonian kimberlite pipes in Siberia reveal similarities within the region in general, but show individual features for ilmenites from different fields and pipes.
I. V. Ashchepkov, N. V. Alymova, A. M. Logvinova, N. V. Vladykin, S. S. Kuligin, S. I. Mityukhin, H. Downes, Yu. B. Stegnitsky, S. A. Prokopiev, R. F. Salikhov, V. S. Palessky, O. S. Khmel'nikova   +11 more
doaj   +1 more source

Interaction between protokimberlite melts and mantle lithosphere: evidence from mantle xenoliths from the Dalnyaya kimberlite pipe, Yakutia (Russia) [PDF]

, 2017
The Dalnyaya kimberlite pipe (Yakutia, Russia) contains mantle peridotite xenoliths (mostly lherzolites and harzburgites) that show both sheared porphyroclastic (deformed) and coarse granular textures, together with ilmenite and clinopyroxene megacrysts.
Afanasiev, Agashev, Agashev, Amshinsky, Arndt, Ashchepkov, Ashchepkov, Ashchepkov, Ashchepkov, Ashchepkov, Ashchepkov, Ashchepkov, Ashchepkov, Ashchepkov, Bedard, Blundy, Boyd, Boyd, Brett, Brey, Burgess, Bussweiler, Bussweiler, Cas, DePaolo, Doucet, Evans, Finnerty, Fulmer, Genshaft, Gibson, Girnis, Giuliani, Goncharov, Green, Gregoire, Haggerty, Hart, Harte, Hauri, Howarth, Höfer, Imai, Ionov, Ionov, Ionov, Ishimaru, Karato, Kargin, Katayama, Kennedy, Klein-Ben David, Klemme, Kohler, Konzett, Kopylova, Kostrovitsky, Krogh, Kuzyura, Lavrent'ev, Lazarov, Logvinova, McCammon, McCammon, McDonough, McGregor, Mitchell, Moore, Moore, Nickel, Nickel, Nimis, O'Neill, O'Neill, Pearson, Peslier, Pokhilenko, Pokhilenko, Pokhilenko, Pokhilenko, Rodionov, Rodionov, Rodionov, Rudnick, Sazonova, Smelov, Sobolev, Sobolev, Sobolev, Sobolev, Sobolev, Sobolev, Solov'eva, Spetsius, Spetsius, Stagno, Stagno, Taylor, Tuff, Wells, Wu, Zack   +101 more
core   +2 more sources

Calibration, Validation and Evaluation of Machine Learning Thermobarometers in Metamorphic Petrology: An Application to Biotite and Outlook for Future Strategy

Journal of Metamorphic Geology, Volume 43, Issue 8, Page 755-780, October 2025.
ABSTRACT Geothermobarometry provides crucial constraints on the physical conditions of metamorphism, offering insights into petrogenetic processes and providing key information on thermal regimes and metamorphic depths to other geological disciplines.
Philip Hartmeier, Jacob B. Forshaw, Pierre Lanari   +2 more
wiley   +1 more source

Compositional zoning of garnet porphyroblasts from the polymetamorphic Wölz Complex, Eastern Alps [PDF]

, 2018
We employ garnet isopleth thermobarometry to derive the P-T conditions of Permian and Cretaceous metamorphism in the Wölz crystalline Complex of the Eastern Alps.
Abart, Rainer, Bestel, Martina, Gawronski, Timo, Rhede, Dieter   +3 more
core  

Crustal shortening, exhumation, and strain localization in a collisional orogen: the Bajo Pequeño Shear Zone, Sierra de Pie de Palo, Argentina [PDF]

, 2014
The Bajo Pequeño Shear Zone (BPSZ) is a lower-crustal shear zone that records shortening and exhumation associated with the establishment of a new plate boundary, and its placement in a regional structural context suggests that local- to regional-scale ...
Austin, Lauren J., Garber, Joshua M., McClelland, William C., Mulcahy, Sean R., Renne, Paul R., Roeske, Sarah M., Vujovich, Graciela Irene, Warren, Jessica   +7 more
core   +1 more source

Structural Data and Thermometry Indicate That the Tso Morari UHP Nappe (Indian Himalaya) Was Emplaced as a Large‐Scale, Structurally Coherent Sheet

Tectonics, Volume 44, Issue 9, September 2025.
Abstract Ultrahigh‐pressure (UHP) nappes provide important opportunities to investigate the processes that exhume rocks from upper mantle depths. Here, we investigate the UHP Tso Morari nappe (TMN) in the Indian Himalaya to test competing models for the construction of UHP nappes via detachment of single, structurally coherent sheets, accretion of ...
Adelie Ionescu, Sean P. Long, Matthew J. Kohn, Kyle P. Larson, Emmanuel Soignard, Jayna Thompson   +5 more
wiley   +1 more source

The validity of plagioclase-melt geothermometry for degassing-driven magma crystallization [PDF]

, 2013
Any quantitative interpretation of the formation conditions of igneous rocks requires methods for determining crystallization temperature. Accurate application of such thermobarometers relies on the attainment of equilibrium in the system to be studied ...
Bernhardsson, Katarina,, Eriksson, Jörgen,, Henning, Karin, Hertil-Lindelöw, Camilla, Lawrence, David, Lund University., Lund University., Neidenmark, Thomas, Pelling, Maja, Svensson, Aina   +9 more
core   +1 more source