Results 51 to 60 of about 22,333 (258)

Characteristics of ∼40 Ma Mafic Rocks in North Tibet and Their Tectonic Implications

Geochemistry, Geophysics, Geosystems, Volume 26, Issue 12, December 2025.
Abstract Several magmatic belts are present in the Tibetan Plateau. Among these, the Qiangtang magmatic belt in North Tibet remains elusive. In particular, the petrogenesis, magma source, and tectonic implications of the ultramafic to mafic rocks in the North Qiangtang area are underinvestigated due to their sparsity and remoteness.
Shifeng Wang, Licai Song, Shengting Zhang, Weifeng Xiao   +3 more
wiley   +1 more source

Diagenetic, Nonevaporative Origin for Calcium Sulfate Salts at Gale Crater

Geochemistry, Geophysics, Geosystems, Volume 26, Issue 12, December 2025.
Abstract Sulfate salts are deposited most commonly as evaporites on Earth; however, this is not their only origin. Pyrite oxidation during subsurface weathering is another common process on Earth that also produces a suite of sulfate salts—including the acidic phases jarosite and alunite—in sedimentary deposits.
Hemani Kalucha, Eliza Carter, John P. Grotzinger, Joel A. Hurowitz, Woodward W. Fischer   +4 more
wiley   +1 more source

Nakhlite Emplacement as Constrained by X‐Ray Computed Tomography and 3D Quantitative Textural and Petrofabric Analyses

Journal of Geophysical Research: Planets, Volume 130, Issue 12, December 2025.
Abstract Nakhlites, clinopyroxene‐rich rocks, are the largest single‐origin suite of samples from Mars. Despite extensive study to discern their petrogenetic histories, nakhlite emplacement mechanisms and environments are not well‐constrained, and it is unknown whether they represent intrusive or extrusive igneous rocks, or a combination.
Sierra R. Ramsey, Piper Irvin, Arya Udry, Scott A. Eckley, Amanda Ostwald, Richard A. Ketcham   +5 more
wiley   +1 more source

The model of charnockite formation process in Thala hills, East Antarctica

Український антарктичний журнал, 2020
The research was performed in 2008-2009 within Belarus Government target program with the 54-th Russian Antarctic expedition. Geological mapping was carried out along with geochemical survey of Precambrian basement of Thala hills in western Enderby Land,
О.В. Miasnikov
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

Geology and petrology of the Salto do Céu Suite: tectonic and stratigraphic implications on the SW Amazonian Craton

Brazilian Journal of Geology
: The basic rocks of the Salto do Céu Suite outcrop as sills and flows in the southwestern Amazon Craton, Rondonian-San Ignacio Province, with an age of about 1.44 Ga. Sills are 2 to 30 m thick being hosted by pelites of the Aguapei Group.
Gabrielle Aparecida de Lima, Moacir José Buenano Macambira, Maria Zélia Aguiar de Sousa, Amarildo Salina Ruiz, Maria Elisa Fróes Batata, Ronaldo Pierosan   +5 more
doaj   +1 more source

Progress in Resource Evaluation Using a Handheld Raman Instrument Developed for Astronaut Missions

Journal of Raman Spectroscopy, Volume 56, Issue 11, Page 1418-1433, November 2025.
Analogue studies were undertaken using a prototype, handheld Raman spectrometer (developed for astronaut usage on the moon) to collect data that would indicate the presence of water and help develop the technology to search for valuable trace elements (such as lithium and caesium).
J. G. T. Armstrong, M. McHugh, J. Parnell, H. N. Lerman, A. Moral, I. B. Hutchinson   +5 more
wiley   +1 more source

Mineralogy, geochemistry and conditions of formation Permian-Triassic intraplate granitoids of Sinyushenskiy Massif (Gorny Altai)

Литосфера, 2016
The data on geological settings, ages, special features of mineralogy and composition of Sinyushensky Massif granitoids the in north-west part of the Gorny Altay region.
N. N. Kruk, O. A. Gavrushkina, C. G. Shokalskiy, A. V. Travin   +3 more
doaj   +2 more sources

Machine Learning Model for Assessing Melting Pressure Conditions of the TTG Genesis: Implications for the Timing of the Onset of Global Plate Tectonics

Geochemistry, Geophysics, Geosystems, Volume 26, Issue 11, November 2025.
Abstract Understanding the pressure conditions of the formation of tonalite‐trondhjemite‐granodiorite (TTG) series rocks is important, as these rocks are key constituents of the Archean continental crust. However, the detailed pressure history of Archean TTG gneisses remains ambiguous due to uncertainties surrounding their sources and the effects of ...
Denggang Lu, Jia Liu, Qunke Xia, Zhikang Luan, Jingjun Zhou, Kailong Yang, Eero Hanski   +6 more
wiley   +1 more source

Slab Tearing and Recycled Continental Sediments in the Lithospheric Mantle: Geodynamic Insights From Miocene Alkaline Rocks of the Tangra‐YumCo Rift, Southern Tibet

Geochemistry, Geophysics, Geosystems, Volume 26, Issue 11, November 2025.
Abstract Mantle metasomatism is a common phenomenon in convergent margins; however, metasomatism by subducted sediments and their role in alkaline magma generation remain poorly understood. Alkaline rocks from the Tangra‐YumCo rift (TYR) in southern Tibet show a unique geochemical composition among post‐collisional volcanic rocks of the Lhasa terrane ...
Esteban Jarquín, Rui Wang
wiley   +1 more source