Results 51 to 60 of about 332,979 (215)
, 1991 The Tallberg porphyry-type deposit is situated in the Early Proterozoic, syntectonic Jörn Granitoid Complex (JGC). The occurrence shows similarities with Phanerozoic porphyry type deposits: (a) low grade (0.27% Cu) and large tonnage, 44 × 106 metric ...
Weihed, Pär,, Weihed, Pär
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Terra Nova, EarlyView.ABSTRACT Although central Brazil hosts significant ion‐adsorption rare earth element (REE) deposits associated with A‐type granites, their coeval volcanic counterparts have been largely overlooked as exploration targets. This study demonstrates that acidic metavolcanic rocks of the Araí Group share strong radiometric, geochemical and mineralogical ...
Yuri Ribeiro +3 more
wiley +1 more source
Magnetite chemistry in the Dalli porphyry Cu-Au deposit, central Urumieh-Dokhtar Magmatic Arc (UDMA)
Journal of Economic Geology, 2023 The Dalli porphyry Cu-Au deposit is located in the central parts of Urumieh –Dokhtar Magmatic Arc (UDMA). This deposit is formed via the emplacing of Miocene intrusions mainly containing diorite and quartz diorite within the Eocene andesite and ...
Alireza Zarasvandi +4 more
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Geodynamic Significance of Intraplate Basaltic Magmatism From the Western Mediterranean Region
Geochemistry, Geophysics, Geosystems, Volume 27, Issue 10, October 2026.Abstract Dynamic topography changes as mantle convection evolves, making its past surface expression difficult to reconstruct. Widespread Neogene‐Quaternary intraplate basaltic magmatism across the Western Mediterranean Region allows us to test whether dated basalts preserve the mantle thermal structure responsible for regional dynamic support.
Chia‐Yu Tien +4 more
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Remote Sensing, 2019 Identifying hydrothermal zoning pattern associated with porphyry copper deposit is important for indicating its economic potential. Traditional approaches like systematic sampling and conventional geological mapping are time-consuming and labor extensive,
Mengjuan Wu +3 more
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Geochemistry, Geophysics, Geosystems, Volume 27, Issue 10, October 2026.Abstract Distributed basaltic volcanic fields commonly host minor but significant silicic magmas, the origin of which remains debated. At Harrat Khaybar (western Saudi Arabia; ca. 1.7 Ma to present), volcanic activity erupted compositions range from alkali olivine basalt to trachyte and comendite.
Abdullah Alohali +5 more
wiley +1 more source
Journal of Geophysical Research: Planets, Volume 131, Issue 10, October 2026.Abstract Microbial communities are strongly controlled by local nutrient availability, frequently resulting from mineral weathering and erosion. On Earth, basaltic rocks in habitable alkaline lacustrine environments are often initially colonised by ‘pioneer’ communities that induce the precipitation of fine‐scale microbial carbonate ‘coatings’; on Mars,
Keyron Hickman‐Lewis +6 more
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, 2019 Geosphere, April 2019, v. 15, no. 2, p. 548-575, doi:10.1130/GES01675.1, Supplemental Items. Contains 29 additional cross sections detailing the subsurface geology of the Oligocene Questa porphyry ...
Sean P. Gaynor (8760726) +2 more
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Tectonics, Volume 45, Issue 10, October 2026.Abstract Following continental collision, the distal European margin was overridden by the Alpine wedge and is now largely concealed beneath the mostly intact orogenic lid. Consequently, the geological evolution and nature of the hidden basement domains remain poorly constrained.
Bianca Heberer +11 more
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, 2023 A thesis submitted to the Faculty of Science in fulfillment of the requirements for the degree of Doctor of Philosophy in Faculty of Science, School of Geosciences University of the Witwatersrand, Johannesburg 2023Porphyryِcopperِdepositsِareِtheِworld ...
Jogee, Bibi Ayesha
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