Results 21 to 30 of about 127 (117)

Chemical‐Thermomechanical Modeling of Open‐System Mass Transfer: Application to the Subduction Interface

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 2, February 2026.
Abstract One of the main limitations in simulating subsolidus metasomatism is the decoupling between thermomechanical models and chemical/thermodynamic modeling. This decoupling amplifies the uncertainty associated with mass transport. Here, we introduce a fluid‐rock chemical‐thermomechanical interaction scheme, which integrates thermodynamic modeling (
Jun Ren, Manuele Faccenda, Xin Zhong, Matthieu E. Galvez, Jianfeng Yang, Nicolas Riel   +5 more
wiley   +1 more source

Geochemical studies and economic perspective of light rare earth element (LREE) enriched carbonatite from Khaderpet, Eastern Dharwar Craton

Discover Geoscience
An account of petrographic features, geochemical character, enriched light rare earth elements (LREEs), and stable isotope (C–O) concentrations in carbonatite occurring in association with lamprophyre clan rock (LCR) from Khaderpet is presented here. The
Pothuri Ramesh Chandra Phani, Prabir Sengupta   +1 more
doaj   +1 more source

Tectonics, geology and origins of Te Riu‐a‐Māui / Zealandia

New Zealand Journal of Geology and Geophysics, Volume 68, Issue 4, Page 531-567, December 2025.
ABSTRACT Te Riu‐a‐Māui / Zealandia is a 95% submerged, five million square km southern hemisphere continent that includes the islands of New Zealand and New Caledonia. For the last 45 million years (Ma) Zealandia has been cut by the Pacific‐Australian plate boundary which today changes character from a west‐dipping subduction zone in the north to ...
Nick Mortimer
wiley   +1 more source

Secular Variation in the North American Kimberlite Formation: The Variable Connection to LLSVPs

Geochemistry, Geophysics, Geosystems, Volume 26, Issue 10, October 2025.
Abstract Kimberlites are rare and perplexing igneous rocks that may represent the deepest‐sourced melt type extracted from within the Earth's mantle, and their origin may be associated with Large Low Shear Velocity Provinces (LLSVPs) along the core‐mantle boundary.
C. Adam, P. D. Kempton
wiley   +1 more source

Thermo‐Mechanical Rift Evolution of Large Igneous Province Crust

Tectonics, Volume 44, Issue 9, September 2025.
Abstract Numerical models, coupled with observational data, have proven crucial for addressing fundamental questions regarding extensional processes from continental rift to mid‐ocean ridge (MOR). However, extensional processes at Large Igneous Provinces (LIP), a distinct type of lithosphere, have not been examined, leaving a thorough comprehension of ...
L. Magri, D. Neuharth, S. Williams, S. Brune, J. M. Whittaker, D. Sandiford, M. F. Coffin, K. Hochmuth, A. Glerum   +8 more
wiley   +1 more source

Petrology of ultramafic lamprophyres from the Beaver Lake area of Eastern Antarctica and their relation to the breakup of Gondwanaland [PDF]

Mineralogy and Petrology, 2002
Mesozoic melilite-bearing ultramafic lamprophyres are developed as sill, dyke and plug-like intrusive bodies in the East Antarctic Beaver Lake area. They consist of varying amounts of olivine, melilite, phlogopite, nepheline, titanomagnetite and perovskite as major phases, accompanied by minor amounts of apatite, carbonate, spinel, glass and, rarely ...
Foley, S., Andronikov, A., Melzer, S.
openaire   +3 more sources

Metasomatism and Melting of Cordilleran Lithosphere Resulting From Sediment Relamination During Shallow Subduction

Geochemistry, Geophysics, Geosystems, Volume 26, Issue 7, July 2025.
Abstract Mantle xenoliths recovered from the modern backarc region of the northern Altiplano Plateau record metasomatism by slab‐derived silicic melts, and a suite of Quaternary volcanics suggest that melting of accreted crustal material has persisted since shallow subduction in the Oligocene.
C. D. Hiett, D. L. Newell, J. W. Shervais   +2 more
wiley   +1 more source

Thickening Cratonic Lithosphere by Horizontal Compression in the Presence of Surface Erosion and Sedimentation

Geochemistry, Geophysics, Geosystems, Volume 26, Issue 6, June 2025.
Abstract Here we examine how lithospheric thickening is affected by active surface sedimentation and erosion in geodynamic models of craton formation—an aspect that has been neglected in previous models even though cratons may be the first landmasses to emerge above sea level.
Kristina Kublik, Claire A. Currie, D. Graham Pearson   +2 more
wiley   +1 more source

Cenozoic Vertically‐tearing of Indian Slab Modified the Asian Lithosphere beneath the Eastern Tibetan Plateau

Acta Geologica Sinica - English Edition, Volume 99, Issue 3, Page 627-633, June 2025.
Abstract A subducted continental slab is sometimes torn during collision, yet the exact impact of slab‐tearing on the overlying lithosphere remains unclear. Here, we image the structure and architecture of the Asian lithosphere above the Indian slab in the eastern Tibetan Plateau using multiscale seismic tomography models and zircon Hf isotopic mapping,
Zengqian HOU, Bo XU, Tiannan YANG, Haijiang ZHANG, Nian YU, Yi ZHAO, Zhuang MIAO   +6 more
wiley   +1 more source

Trans‐Crustal Geophysical Responses Beneath the Supergiant Timmins‐Porcupine Orogenic Gold Camp, Canada

Journal of Geophysical Research: Solid Earth, Volume 130, Issue 3, March 2025.
Abstract A new 80‐site magnetotelluric (MT) survey, integrated with reprocessed seismic reflection profiles, across the supergiant Timmins‐Porcupine gold camp of the Abitibi greenstone belt (AGB) was conducted to investigate the architecture of crustal‐scale structures.
A. Q. Adetunji, I. J. Ferguson, J. M. Simmons, C. Ma, S. Cheraghi, D. B. Snyder, J. A. Ayer   +6 more
wiley   +1 more source