Results 81 to 90 of about 2,033 (198)

Developing New Amphibole Thermobarometers to Constrain High P‐T Hydration Processes of Basic‐Ultrabasic Rocks

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 8, August 2026.
Abstract Amphibole compositions record high‐pressure‐temperature (P‐T) hydration processes during magmatism and metamorphism in the deep Earth. However, amphibole thermobarometers calibrated for basic–ultrabasic systems are scarce. To address this issue, we compiled Ca‐amphibole data from published equilibrium experiments and used machine‐learning ...
Wenbo Xu, Weilin Chen, Shubham Choudhary, Shijie Li, Jintao Zhu, Xiaogang Ma, Jiamin Wang, Shujuan Jiao, Guibin Zhang, Lifei Zhang, Renbiao Tao   +10 more
wiley   +1 more source

Distinct Transcrustal Evolutions of Komatiitic Primitive Magma: Implications for the Compositional Dichotomy of Continental Flood Basalts

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 8, August 2026.
Abstract The origin of the compositional dichotomy between high‐Ti and low‐Ti basalts in continental flood basalt provinces remains debated. Most existing studies attribute this dichotomy directly to variations in primitive magma composition to circumvent the complexities of significant evolutionary processes, such as multiphase fractional ...
Zongpeng Yang, Tong Hou, Roman Botcharnikov, Evangelos Moulas, Meng Wang, Stephan Buhre, Zhaochong Zhang   +6 more
wiley   +1 more source

Rheology and Structure of Fe‐Mg‐Ca Enriched Silicate Melt: Benchmarking Viscosity Models for an Exotic Planetary Composition

Journal of Geophysical Research: Planets, Volume 131, Issue 8, August 2026.
Abstract Silicate melt viscosity plays a pivotal role in the evolution of rocky bodies within the Solar System, exerting first‐order control on mantle differentiation and stratification, while dictating the metal‐silicate separation and the subsequent volcanic activity.
Fabrizio Di Fiore, Michele Cassetta
wiley   +1 more source

Ultramafic Rocks [PDF]

Nature, 1968
openaire   +1 more source

Ediacaran–Cambrian High‐Strain Melt‐Present Deformation of the Archean Charcot Province, East Antarctica

Tectonics, Volume 45, Issue 8, August 2026.
Abstract The assembly of Gondwana involved several Pan‐African orogens, although their extension into ice‐covered Antarctica remains contentious. Particularly problematic is our understanding of the Kuunga orogenic system in East Antarctica, including its eroded architecture and temporal evolution. The remote Charcot Province, at the easternmost extent
Jacqueline A. Halpin, Nathan R. Daczko, Jacob A. Mulder, Alessandro Maritati, Tobias Stål   +4 more
wiley   +1 more source

Subduction Initiation and Early Subduction Zone Development: Insights From the P–T–t Path of the Bay of Islands Metamorphic Sole

Journal of Metamorphic Geology, Volume 44, Issue 7, Page 510-536, August 2026.
ABSTRACT The processes involved during subduction initiation (SI) remain poorly constrained, in part due to the rarity of geological archives. Ophiolites and their underlying metamorphic soles are thought to form during subduction zone infancy and may thus provide critical constraints. Metamorphic soles are derived from oceanic crust of the lower plate
François Fournier‐Roy, Carl Guilmette, Mark Coleman, Kyle Larson, Douglas K. Tinkham, Alana M. Hinchey, John Wakabayashi, Jean H. Bédard, Louise Mérit, Philippe Agard, Loïc Labrousse, Antoine Godet   +11 more
wiley   +1 more source

Carbonated ultramafic igneous rocks in Jezero crater, Mars

Science
The Perseverance rover landed in Jezero crater on Mars, which once contained a lake of liquid water. We report the rock properties encountered by Perseverance during a 10-kilometer traverse extending over 400 meters in elevation, from beneath Jezero’s western sedimentary fan to the upper crater rim.
Kenneth H. Williford, Kenneth A. Farley, Briony H. N. Horgan, Brad Garczynski, Allan H. Treiman, Sanjeev Gupta, Alexander J. Jones, Sandra Siljeström, Elise Clavé, Lisa Mayhew, Jeffrey T. Osterhout, Eleni Ravanis, Kathryn M. Stack, Sarah Fagents, Candice C. Bedford, Tanja Bosak, Sergei V. Bykov, David Flannery, Kevin P. Hand, Michael W. M. Jones, Linda Kah, Athanasios Klidaras, Justin Maki, Lucia Mandon, Elias Mansbach, Francis M. McCubbin, Justin I. Simon, Anushree Srivastava, Kyle Uckert, Roger C. Wiens, Sanna Alwmark, Julene Aramendia, Robert Barnes, Pierre Beck, James F. Bell, Sylvain Bernard, Rohit Bhartia, Michael S. Bramble, Adrian J. Brown, Adrian Broz, Denise Buckner, David C. Catling, Edward Cloutis, Stephanie Connell, Andrea Corpolongo, Andrew D. Czaja, Erwin Dehouck, Teresa Fornaro, Olivier Forni, Nikole C. Haney, Keyron Hickman-Lewis, William Hug, Ari Koeppel, Juan Manuel Madariaga, Jesús Martínez-Frías, Jorge I. Núñez, Brendan J. Orenstein, Yu Yu Phua, Cedric Pilorget, Nicolas Randazzo, Clément Royer, Eva L. Scheller, Nicole Schmitz, Susanne Schröder, Mark A. Sephton, Shiv Sharma, Sunanda Sharma, David Shuster, Kimberly P. Sinclair, Andrew Steele, Christian Tate, Benjamin Weiss, Amy J. Williams, Z. Uriah Wolf, R. Aileen Yingst   +74 more
openaire   +2 more sources

LifeMet: Report on the 2024–2025 meteorite recovery expedition in Dronning Maud Land, Antarctica for the study of microbe–meteorite interactions

Meteoritics &Planetary Science, Volume 61, Issue 8, Page 1847-1860, August 2026.
Abstract Since the discovery of nine meteorites near the Yamato mountains in 1969, Antarctica has been recognized as a superb location for meteorite recovery. While Antarctic recovery expeditions prioritize meteorite preservation for mineralogical and planetary studies, meteorites are not typically collected for biological applications.
Rachael Lappan, Rachel S. Kirby, Andrew G. Tomkins   +2 more
wiley   +1 more source

Xenoliths in the alkali basalts of Makhtesh Ramon of Desert Negev (Israel) as indicators of mantle metasomatosis and magma generation

Литосфера, 2016
Xenoliths in the Early Cretaceous alkali basalts of Makhtesh Ramon basin (southern Israel) are represented by essentially olivine rocks: dunite (usually including clinopyroxen) - 5% of the total amount, lherzolite - 21%, wehrlite - 28%, clinopyroxenite -
G. B. Fershtater, Z. A. Yudalevich, V. V. Khiller   +2 more
doaj   +2 more sources

Stardust Mine: A 2024 gabbroic shergottite from Arizona, USA

Meteoritics &Planetary Science, Volume 61, Issue 8, Page 1826-1846, August 2026.
Abstract This study provides an initial characterization of Stardust Mine, a fresh gabbroic enriched shergottite collected in Arizona, USA, in September 2024 and is the first Martian meteorite to be unequivocably collected on US soil. Analysis was conducted on the type specimen and finds that Stardust Mine is composed of equal proportions of pyroxene ...
Jennifer T. Mitchell, Natasha R. Stephen, Zsuzsanna P. Allerton, Weiming Ding, Xin‐Yuan Zheng   +4 more
wiley   +1 more source