Results 61 to 70 of about 2,647 (217)

METAMORPHIC CONDITIONS OF ULTRAMAFIC LENSES FROM THE EASTERN SØR RONDANE MOUNTAINS, EAST ANTARCTICA [PDF]

, 1990
P(論文)Lenses up to 5m in size of ultramafic rocks occur in quartzo-feld-spathic, locally migmatized, gneisses at four localities of the eastern Sør Rondane Mountains.
ASAMI, Masao, GREW, Edward S., MAKIMOTO, Hiroshi   +2 more
core   +1 more source

Geochemical, O-H-Sr Isotopic, and Thermodynamic Insights into the Metasomatic and Metamorphic Evolution of the Saxothuringian Crust: The Case of the Kowadło Ultramafic Suite (SW Poland) [PDF]

Lithosphere
The Orlica-Śnieżnik Dome in the Bohemian Massif represents a key window into the tectonic and geochemical evolution of the Saxothuringian continental crust, exemplified by the stratified Kowadło ultramafic suite.
Mohamed M. Hamdy, Basem A. Zoheir, Thomas C. Meisel, Hamed Gamaleldien, El Saeed R. Lasheen, Tamer S. Abu-Alam   +5 more
doaj   +1 more source

Reaction‐Driven Crack Propagation Controlled by Vein Extension in a Dilute Fracture System

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 10, October 2026.
Abstract Permanent mineral trapping of CO2 ${\text{CO}}_{2}$ in ultramafic rocks can be accelerated if carbonate precipitation wedges open microcracks and sustains crack growth, thereby increasing permeability and reactive surface area. We develop a vein‐extension controlled model for carbonation reaction‐driven cracking in a dilute fracture system ...
Rui Feng, John Rudnicki
wiley   +1 more source

A Machine‐Learning Surrogate for Differentiable Phase Equilibrium Modeling of Mantle Rocks on a Planetary Scale

Journal of Geophysical Research: Machine Learning and Computation, Volume 3, Issue 5, October 2026.
Abstract Modeling processes within Earth's and other planetary bodies' mantle requires constraints from phase equilibrium to infer how changes in phase abundance and composition affect physical properties and geochemical processes. When applying such thermodynamic models on a planetary scale, performance becomes especially crucial.
Philip Hartmeier, Pierre Lanari
wiley   +1 more source

Experimental Insights Into the Petrogenesis of Plume-Related Magmas: Tholeiite-Harzburgite Interaction at 2-3 GPa and 1,400-1,500°C

How eclogite/pyroxenite-derived melts evolve through the refractory lithosphere above a plume remains poorly understood. Here we conducted layered experiments of reaction between tholeiitic melts and harzburgite at 2-3 GPa, 1,400-1,500 degrees C, with a ...
Li, Yuan, Zhang, Yan-Fei, Wang, Yu, Xu, Yi-Gang, Hou, Yong-Sheng, Li, Hong-Yan   +5 more
core   +1 more source

Enrichment of HFSE in chlorite-harzburgite produced by high-pressure dehydration of antigorite-serpentinite: Implications for subduction magmatism

, 2005
Depletion of high-field-strength trace elements (HFSE) relative to normal mid-ocean basalts (N-MORB) is the most distinctive geochemical fingerprint of subduction magmatism. Proposed hypotheses advocate that this “subduction” signature is acquired during
Sanchez-Vizcaino, Vicente Lopez, María Teresa Gómez‐Pugnaire, Marguerite Godard, Bodinier, Jean-Louis, Godard, Marguerite, Volkmar Trommsdorff, Olivier Alard, Jean‐Louis Bodinier, Gomez-Pugnaire, Maria Teresa, Vicente López Sánchez‐Vizcaíno, Trommsdorff, Volkmar, Alard, Olivier, Garrido, Carlos J., Carlos J. Garrido, López Sánchez-Vizcaíno, Vicente   +14 more
core   +1 more source

Composition and spectroscopy of olivine xenocrysts from the Hawaiian tholeiitic basalts

Учёные записки Казанского университета: Серия Естественные науки, 2020
Tholeiitic basalts of the Hawaiian Mauna Loa and Kīlauea volcanoes (USA) contain olivine xenocrysts with chromespinelide inclusions. Their chemical composition and spectroscopic properties were investigated and compared with olivine of another ...
A.B. Makeyev, V.P. Lutoev, I.P. Vtorov, N.I. Braynchaninova, A.R. Makavetskas   +4 more
doaj   +1 more source

IGyTheM: Integrating Geodynamics With Thermodynamics Using Machine Learning

Journal of Geophysical Research: Machine Learning and Computation, Volume 3, Issue 5, October 2026.
Abstract Achieving a comprehensive understanding of mantle convection requires integrated models that couple mantle dynamics with thermodynamic properties. Although advances in computational geodynamics have substantially improved our ability to simulate the underlying physical processes, incorporating thermodynamics into self‐consistent geodynamic ...
Qian Yuan, Paul D. Asimow, Michael Gurnis, Paula Antoshechkina, Junjie Dong   +4 more
wiley   +1 more source

Multi‐Stage Evolution of Subducted Oceanic Mantle: The Marlborough Ultramafic Suite (New England Orogen, Australia)

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 9, September 2026.
Abstract Oceanic lithosphere is continuously destroyed by subduction, challenging our ability to develop tectonic reconstructions. One way to tackle this problem is to examine relics of once‐consumed oceanic domains preserved along convergent margins. In the New England Orogen (eastern Australia), disrupted exposures of ultramafic rocks loosely define ...
J. A. Pasco, G. Rosenbaum, T. Ubide, L. A. Milan, C. Spier   +4 more
wiley   +1 more source

Peridotite xenoliths from Grenada, Lesser Antilles Island Arc

, 2015
Ultramafic xenoliths comprising harzburgite, lherzolite (reacted harzburgite) and spinel-rich dunite, occur in alkali olivine basalts (M series) of Grenada in the Lesser Antilles island arc.
Eggins, Stephen, Parkinson, I J, Arculus, Richard   +2 more
core   +2 more sources