Results 81 to 90 of about 7,051 (253)

Mantle Xenolith Evidence for Lithospheric Thinning and Metasomatic Modification Beneath the Eastern Fiji Plateau: Implications for Samoan Plume Supply, Intraplate Volcanism, and Orocline Formation

New Zealand Journal of Geology and Geophysics, Volume 69, Issue 1, March 2026.
We provide petrographic and geochemical characterisation of mantle xenoliths from Koro Island, eastern Fiji. Several lherzolite xenoliths display spinel–pyroxene symplectite textures, including preserved former grain boundaries, consistent with garnet breakdown that we attribute to thinning of a preexisting garnet‐facies lithospheric mantle beneath ...
Natasha Barrett, Stephen T. Johnston, Neil N. Kumar, Holger Sommer, D. Graham Pearson   +4 more
wiley   +1 more source

Study on the mechanism of remote sensing anomaly extraction and correlation analysis of ore controlling: Take the Qimantag metallogenic belt of Qinghai as an example

矿业科学学报, 2017
Information extraction from remote sensing and the research of ore controlling factors has been in the two aspects isolated corrosion, the relationship between remote sensing anomaly extraction and deposit metasomatic alteration in the theory system has ...
Tang Chao, Shao Longyi
doaj  

Magmatic significance and hydrothermal alteration of layered chromitites from the Bracco Gabbro Complex, Ligurian Ophiolites, Italy

Bulletin of the Mineral Research and Exploration
The Bracco chromitites are hosted in the Mesozoic Ligurian Ophiolites (Italy) and provide key insights into the magmatic and post-magmatic (i.e. metamorphic and hydrothermal) evolution ofgabbro-hosted chromitites in an oceanic mantle.
Federica Zaccarini, Raphael J. Baumgartner, Constantinos Mavrogonatos, Giorgio Garuti   +3 more
doaj   +1 more source

Composition and Structure of Zircon from Hydrothermal Uranium Occurrences of the Litsa Ore Area (Kola Region, Russia)

Geosciences, 2020
Zircon grains from various metagranitoids (plagio- and monzo-granites, gneisses, metasomatic rocks, and pegmatoid veins) from the Skal’noe and Dikoe sites of the Litsa uranium ore area (Kola Region, Russia) were studied in order to reconstruct the ...
Tatiana Kaulina, Lyudmila Lyalina, Vadim Kamenetsky, Vadim Il’chenko, Vladimir Bocharov, Maria Gannibal   +5 more
doaj   +1 more source

Oxygen Isotope Variations of Basaltic Lavas and Upper Mantle Rocks [PDF]

, 2001
This chapter summarizes the oxygen isotope geochemistry of terrestrial basalts and their mantle sources, including the conceptual framework for interpreting such data and the phenomenology of known variations.
Eiler, John M.
core  

Subduction Zone Magnetism: The Influence of Metamorphism and Serpentinization in the Mantle Wedge

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 3, March 2026.
Abstract Subduction zone magnetic anomalies have previously been used to infer their thermal structure assuming a uniformly serpentinized mantle carries a homogeneous, isotropic magnetization. However, seismic tomography, geological observations and numerical modeling provide increasing evidence for a non‐uniformly serpentinized mantle wedge that may ...
Y. Li, P. C. Lindquist, D. Han, B. Fish, R. J. Harrison, W. McCarthy, R. M. Palin, C. B. Condit, C. I. O. Nichols   +8 more
wiley   +1 more source

Fluid-induced breakdown of white mica controls nitrogen transfer during fluid–rock interaction in subduction zones [PDF]

, 2016
Author Posting. © The Author(s), 2016. This is the author's version of the work. It is posted here by permission of Taylor & Francis for personal use, not for redistribution. The definitive version was published in International Geology Review 59 (2017)
Bebout, Gray, Halama, Ralf, John, Timm, Marschall, Horst R.   +3 more
core   +3 more sources

The Três Estradas Alkaline-Carbonatite Complex, Southernmost Brazil: Mineralogy, Metasomatic Alteration, Geochemistry and Implications for the Genesis

, 2023
Guilherme Annes Martinez, José Carlos Frantz   +1 more
openalex   +1 more source

Mineralogy and composition of Archean Crust, Greenland: A pilot study [PDF]

The Portable Instant Display and Analysis Spectrometer (PIDAS) was taken to southwestern Greenland to investigate in situ the potential application of AVIRIS to estimate the mineralogy and composition of rocks exposed in Archean terranes. The goal was to
Curtiss, Brian, Goetz, Alexander F. H.
core   +1 more source

Study on the Mineralogical Characteristics of Cinnabar Jade by X-ray Powder Diffraction-Laser Raman Spectroscopy-Electron Probe from Xunyang, Shan'xi Province

Yankuang ceshi, 2014
In recent years, due to the similar appearance of Chicken-blood stone, red cinnabar jade has been a research concern of mineral composition, lithology and other related aspects in Jilin, Guizhou, Qinghai and other places.
WANG Yi, CHANG Na, LIU Ya-fei, ZHAO Hui-bo, LIU San   +4 more
doaj   +2 more sources