Results 61 to 70 of about 22,333 (258)

Newly identified Caledonian gabbro (450 Ma) in the eastern Guangxi, South China: Production of intraplate orogenic process

China Geology, 2021
Yang Tian, Si-fang Huang, Ling-zhan Wang, Xiang Li, Guo-gang Xie   +4 more
doaj   +1 more source

Petrogenesis and tectonic setting of the proto-tethyan dachaidan ophiolite, North China: insights from clinopyroxene chemistry and whole-rock Sr–Nd–Pb and zircon Hf isotopes

Frontiers in Earth Science
IntroductionThe Dachaidan ophiolites outcrop within an ultrahigh-pressure metamorphic belt along the northern margin of the Qaidam Basin. However, their age, source, and tectonic setting remain still in debate.MethodIn this study, we investigated the ...
Yilin Qu, Yilin Qu, Xijun Liu, Xijun Liu, Xijun Liu, Xijun Liu, Xiao Liu, Xiao Liu, Xiao Liu, Qianwen Huang, Qianwen Huang, Qijun Yang, Rongguo Hu, Rongguo Hu, Rongguo Hu, Pengde Liu, Yujia Song   +16 more
doaj   +1 more source

Petrogenesis of the highly fractionated granites and their mineralizations in Nanling Range, South China

Yanshi - xuebao : jikan, 2023
Wu Fuyuan, Guo Chunli, HU FangYang, Li Xiaochi, Zhao Junxing, Li Xiaofeng, Qin Kezhang   +6 more
semanticscholar   +1 more source

Cosmic ray exposure and gas retention ages of the shocked angrite Northwest Africa 7203: Implications for a collisional history of angrites' parent body

Meteoritics &Planetary Science, Volume 60, Issue 11, Page 2560-2573, November 2025.
Abstract Angrites and eucrites are among the oldest basaltic rocks in the solar system. However, the shock histories of these meteorite groups differ markedly, as most angrites show little to no evidence of shock metamorphism. While some angrites exhibit weak wavy extinction in olivine, indicative of low‐level shock, only two—Northwest Africa (NWA ...
Atsushi Takenouchi, Hirochika Sumino, Hideyuki Hayashi, Takashi Mikouchi, Martin Bizzarro   +4 more
wiley   +1 more source

Granite petrogenesis and the δ44Ca of continental crust

Earth and Planetary Science Letters, 2023
M. A. Antonelli, C. Yakymchuk, E. Schauble, J. Foden, V. Janoušek, J. Moyen, J. Hoffmann, F. Moynier, O. Bachmann   +8 more
semanticscholar   +1 more source

Petrogenesis of the Platinum-Group Minerals

, 2016
The platinum-group minerals (PGM) are a diverse group of minerals that concentrate the platinum-group elements (PGE; Os, Ir, Ru, Rh, Pt, and Pd). At the time of writing, the International Mineralogical Association database includes 135 named discrete PGM
B. O’Driscoll, J. González-Jiménez
semanticscholar   +1 more source

Geology, alteration, age dating and petrogenesis of intrusive bodies in Halak Abad prospect area, NE Iran

Journal of Economic Geology, 2014
The Halak Abad prospect occurs in the northeastern part of Central Iran zone (Sabzevar structural zone). In this investigation, geochemical evolution, age and source of part of northeastern Iran magmatic arc (intrusive bodies) in Halak Abad area in the ...
Maliheh Ghourchi, Mohammad Hassan Karimpour, J. Lang Farmer, Charles Stern   +3 more
doaj  

The Petrogenesis and Geological Implications of the Sanggeda Gabbros, Southern Tibet: Insights from the Amphibole Crystal Population

Applied Sciences
Amphibole is an important mineral during the differentiation of arc magmas but rarely as a phenocryst in arc lavas or eruptive pyroclastic rocks. The Sanggeda complex, intruded into the ophiolite of the Indus–Yarlung Zangbo Suture Zone (IYZSZ), Zedong ...
Xiumin Jiang, Zhaohua Luo, Xiao Liu
doaj   +1 more source

Petrogenesis of the Lalezar granitoid intrusions (Kerman Province - Iran) [PDF]

Journal of Sciences, Islamic Republic of Iran, 2015
The Lalezar granitoids crop out within volcanic successions of the Urumieh-Dokhtar Magmatic Assemblage (UDMA). These granitoids have a range from gabbro-diorites to granites in composition.
S. M. Niktabar, A. Moradian, H. Ahmadipour1, J. F. Santos, M. H. Mendes   +4 more
doaj  

ZIRCON IN HIGH‐MG DIORITE OF THE CHELYABINSK MASSIF (SOUTH URALS): MORPHOLOGY, GEOCHEMICAL SIGNATURE, AND PETROGENESIS IMPLICATIONS

Геодинамика и тектонофизика, 2019
The article is focused on the morphology, trace element composition, U‐Pb and Lu‐Hf systems in zircon in high‐Mg diorite of the Chelyabinsk granitoid massif.
T. A. Osipova, G. A. Kallistov, M. V. Zaitseva   +2 more
doaj   +1 more source