Results 151 to 160 of about 552,470 (226)

Tectonic Evolution and Crustal Growth of the East Kunlun Orogen, NW China: Insights From the Late Permian–Triassic Granitoids

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 8, August 2026.
Abstract The East Kunlun Orogen (EKO) on the northern margin of the Tibetan Plateau experienced complex Late Paleozoic–Early Mesozoic tectono‐magmatic activities associated with the subduction and closure of the Paleo‐Tethys Ocean. Controversies remain regarding the timing and processes of the transition from subduction to collision and post‐collision,
Xiaodong Wang, Chao Wang, Liyun Zhang, Jinxiang Li, Yahui Yue, Lin Ding   +5 more
wiley   +1 more source

Oxygen Fugacity Buffers and an Interactive Calculator

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 8, August 2026.
Abstract Oxygen fugacity buffers are equilibrium phase assemblages that constrain the chemical potential of oxygen. They may be coexisting minerals or fluids, or their metastable extrapolations. Oxygen fugacity values vary as a function of pressure and temperature, such that raw numbers often have little interpretive value.
Michael Anenburg
wiley   +1 more source

An Open‐Source Markov Chain Monte Carlo Inversion Software for the Analysis of Experimental Rock Deformation Data

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 8, August 2026.
Abstract Despite its importance in modeling the interior dynamics of a planet, our understanding of interior rheology remains incomplete because of several reasons, including insufficient experimental data and inadequate analysis of the available data.
C. Jain, J. Korenaga
wiley   +1 more source

Highly Enriched and Heterogeneous Mantle Signals Recorded in Mantle Pyroxenite Veins

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 8, August 2026.
Abstract The Earth's mantle is inherently heterogeneous, reflecting ongoing mantle depletion and crustal recycling driven by plate tectonics. Radiogenic isotopes in oceanic basalts are commonly used to characterize mantle reservoirs, but the full chemical diversity of mantle‐derived melts may be obscured by magma mixing during melt transport and ...
Zhen‐Yu Zhang, Chuan‐Zhou Liu, Yan Liang, Tong Liu, Chang Zhang, Bo‐Da Liu, Wen‐Bin Ji, Wei‐Qi Zhang, Ke Huang   +8 more
wiley   +1 more source

A Graphical User Interface Application to Model Open‐System Melting in the Upper Mantle

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 8, August 2026.
Abstract The mantle partial melting process is crucial for the physicochemical evolution of the Earth's upper mantle and the generation of mafic crust. The open‐system melting model incorporates continuous melt segregation, interaction with melts or fluids, and crystallization of trapped melt and therefore provides a comprehensive model for simulating ...
I. Nishio, N. Akizawa, K. Ozawa, K. Itano, P. Waterton   +4 more
wiley   +1 more source

Evolution in Fluid Composition During Subduction

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 8, August 2026.
Abstract Fluid‐rock reactions play important roles in seismicity, arc‐magma chemistries, and volatile cycling at convergent plate boundaries. In subduction environments, metamorphic reactions involving hydrous fluids facilitate metasomatic alteration and mass transport.
A. A. Helm, M. J. Caddick, R. J. Bodnar
wiley   +1 more source

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

MELTING POINT IN THE EARTH'S MANTLE

MELTING POINT IN THE EARTH'S MANTLE
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Mantle flow, melting, and dehydration of the Iceland mantle plume

Earth and Planetary Science Letters, 1999
Abstract Recent studies have shown that the extraction of water from the mantle due to partial melting beneath mid-ocean ridges may increase the viscosity of the residuum by 2–3 orders of magnitude. We examine this rheological effect on mantle flow and melting of a ridge-centered mantle plume using three-dimensional numerical models. Results indicate
Yang Shen, Greg Hirth, Garrett Itô
exaly   +3 more sources

Earth’s Mantle Melting and Volcanism

2014
Convection currents inside the Earth’s asthenosphere will cause instability at shallow depths in the mantle. Rising material and subsequent decompression melting will form hot, upwelling mantle plumes or diapirs. This phenomenon is more common on slow spreading ridges (total rate 5 cm/yrs) spreading ridge segments with their extensive fissural ...
R. Hékinian
openaire   +2 more sources