Results 81 to 90 of about 22,282 (212)

Paleomagnetism of the Scourie Dykes, Lewisian Foreland, NW Scotland: Constraints on Early Paleoproterozoic Paleogeography of Kenorland

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 10, October 2026.
Abstract The Scourie dyke swarm in the Lewisian foreland of northwest Scotland provides key constraints on the Paleoproterozoic evolution of the North Atlantic craton. High‐precision U‐Pb geochronology identifies two distinct intrusive phases at ∼2.41–2.38 Ga and ∼2.00 Ga.
M. Mirzaei, V. A. Kravchinsky, F. Alizadeh, L. Heaman, A. Goguitchaichvili   +4 more
wiley   +1 more source

Crystal chemistry of biotites from mafic enclaves in the Warburton granodiorite, Lachlan Fold Belt (Australia)

, 1998
This study details the crystal chemical features of biotite crystals from host granodiorite and mafic microgranitoid enclaves in the Warburton Granodiorite (Lachlan Fold Belt, Australia), a small (similar to 80 km(2)) S-type pluton within the Melbourne ...
M. ELBURG, BRIGATTI, MF, Elburg, Marlina, LUGLI, C, BRIGATTI, Maria Franca, POPPI, L, LUGLI, Cristina, POPPI, Luciano   +7 more
core   +1 more source

Apatite as a Proxy for Reconstructing Magma Mixing Histories in Granitoids

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 10, October 2026.
Abstract Apatite is a common accessory mineral in granites and mafic microgranular enclaves (MMEs), and its textural and compositional characteristics can record dynamic magmatic evolution processes. Apatites from the Early Cretaceous Sanguliu granite and its MMEs in the Liaodong Peninsula exhibit pronounced compositional heterogeneities. In this study,
Xiaowen Lin, Jiahao Zheng, Wanyi Feng
wiley   +1 more source

Correlation between ore mineralogical composition at different depths and Bond Work Index for the Erdenetiin Ovoo Cu-Mo porphyry deposit, Mongolia

Mongolian Geoscientist
The Erdenetiin Ovoo Cu-Mo porphyry deposit in Mongolia is the largest copper mine corporation in the nation. In this study, we investigate the grinding properties of biotite granodiorite and granodiorite rock alteration relative to variations in mine ...
Batmunkh Tumen-Ayush, Chinzorig Bavuu, Narangerel Adiyasuren, Davaajargal Darambazar, Ganbileg Davaajav, Khaliun Amartuvshin, Sondor Ganbat, Tsend-Ayush Tserendagva, Altankhuyag Dorjyunden, Ganzorig Chimed   +9 more
doaj   +1 more source

Subduction Recycling and Closure of the Paleo‐Asian Ocean in the Beishan Orogen: Constraints From the Niujuanzi Ophiolitic Mélange and Associated Intrusions

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 10, October 2026.
Abstract Ophiolitic mélanges and associated intrusions provide key archives for reconstructing the evolution of ancient ocean basins and subduction‐related mantle modification. The Hongliuhe–Niujuanzi–Xichangjing ophiolitic mélange in the central Beishan Orogen preserves important records of the Paleo‐Asian Ocean, but the timing of oceanic subduction ...
Yujia Song, Xijun Liu, Yao Xiao, Honghu Zeng, Pengde Liu   +4 more
wiley   +1 more source

Potassium–Argon Ages of the Eagle Granodiorite, Southern British Columbia

, 1972
Eight potassium–argon ages from the Eagle granodiorite of south-central British Columbia indicate that the body was intruded over a period of about 10 m.y. with the predominant intrusive activity occurring 104 m.y. ago.
E. Farrar, J. C. Roddick
core   +1 more source

Geochronology, Zircon Geochemical Characteristics, and Tectonic Significance of the Ore-forming Plutons in the Shuikoushan Ore Field, Hunan

Donghua Ligong Daxue Xuebao. Ziran Kexue Ban
[Objective]The study aims to precisely constrain the emplacement age of the ore-forming plutons in the Shuikoushan ore field and reveal their source characteristics and tectonic setting. [Methods]Zircon U-Pb dating, trace element and Hf isotopic analyses
He Haiyang, Hou Danping, Xiang Chengxi, Guo Cong, Zeng Tao, Liao Zhuofeng, Xu Jialong, Li Xiangcheng, Huang Xiangyao, Miao Wenhou   +9 more
doaj   +1 more source

Zircon U-Pb age, trace element and Hf isotope composition of Sepon Au-Cu deposit, Laos: tectonic and metallogenic implications

China Geology, 2018
: The Truong Son Fold Belt, located at the northeastern margin of the Indochina Block, is considered to be tectonically linked to the subduction of the Paleotethys Ocean and subsequent collision. Sepon is one of the most important super large deposits of
Xin-yu Wang, Dian-hua Cao, Zong-qi Wang, An-jian Wang, Yu-dong Wu   +4 more
doaj   +1 more source

The Wilson Cycle of the North Altyn Ocean: A Record of Subduction Initiation, Slab Rollback, and Final Closure

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 10, October 2026.
Abstract The North Altyn ophiolitic belt was formed by the subduction–closure of the Altyn segment of the Proto–Tethys Ocean and recorded the accretion of Tarim to northern Gondwana, but the timing of initial subduction and detailed tectonic transition processes remain poorly constrained. This study reports the oldest Phanerozoic magmatic record of 537 
Long Chen, Jinlong Yao, Guochun Zhao, Yigui Han, Qian Liu, Donghai Zhang, Xijun Zhao, Hang Yang, Wei Li   +8 more
wiley   +1 more source

Origin of the late Early Cretaceous granodiorite and associated dioritic dikes in the Hongqilafu pluton, northwestern Tibetan Plateau: A case for crust-mantle interaction

, 2016
We present a detailed study of geochronology, mineral chemistries, bulk-rock major and trace element abundances, and Sr-Nd-Hf isotope compositions of the granodiorite and associated dioritic dikes in the Hongqilafu pluton at the northwestern margin of ...
Ji-Yong Li, Y. Niu, Yan Hu, Shuo Chen, Yu Zhang, Meng Duan, Pu Sun   +6 more
semanticscholar   +1 more source