Results 71 to 80 of about 2,212 (216)

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

Genesis and geological significance of intrusive rocks in the Lalinggaolihe iron deposit, east Kunlun, NW China: evidence from geochronology, petrological geochemistry, and Hf isotopes

Frontiers in Earth Science
The Lalinggaolihe mining area, situated in the southeastern Qimantag Mountain within the East Kunlun Orogen, hosts skarn-type Fe–Cu–Zn polymetallic deposits and is characterized by widespread intrusive rocks.
Yuanlin Liu, Chao Chen, Xinbiao Lv, Rongke Xu, Delong Zhang, Hongyu Liu, Zhongcheng Zhang   +6 more
doaj   +1 more source

Data for: Zircon U-Pb, Geochemical and Isotopic Constraints on the Age and Origin of A- and I-type Granites and Gabbro-Diorites from NW Iran: Implication for Continental Crust Growth

, 2021
The continental crust of NW Iran is intruded by Late Cretaceous I-type granites and gabbro-diorites as well as Paleocene A-type granites. SIMS and LA-ICPMS U-Pb analyses of zircons yield ages of 100-92 Ma (Late Cretaceous) for I-type granites and gabbro ...
Shafaii Moghadam, H (via Mendeley Data), Shafaii Moghadam, Hadi   +1 more
core   +1 more source

Role of Post‐Collisional Magmatism in Continental Growth and Reworking Since the Late Archean

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 10, October 2026.
Abstract The mechanisms responsible for the formation and compositional evolution of continental crust remain central questions in Earth science. Post‐collisional magmatism is widely preserved in the continental record; however, its contribution to crustal growth may be underestimated because enriched isotopic signatures obscure juvenile mantle input ...
Dongjian Ouyang, Ross N. Mitchell, Peng Peng, Jinghui Guo, Qiuli Li   +4 more
wiley   +1 more source

The petrogenesis and geochemistry of the dioritic complexes south of Balmoral forest, Angus [PDF]

, 1987
The Glen Doll and Juan Jorge Complexes are two contrasting late Caledonian calc-alkaline plutons intruded into Middle Dalradian metasediments at the northern end of Glen Clova, in the Angus district of Tayside, Scotland.
Jarvis, Kym E.
core   +4 more sources

Hornblendites, gabbros and diorites from the Montnegre Massif (Barcelona, Catalonian Coastal Ranges) [PDF]

, 2013
En relación con los granitos tardihercínicos calcoalcalinos del Macizo del Montnegre aparecen rocas ultrabásicas-básicas a intermedias. Las más básicas son hornblenditas olivínicas, con espinela, clinopiroxeno, ortopiroxeno, anfíboles de varios tipos ...
Butjosa, Lidia, Galán, Gumer, Enrique Gisbert, Pere   +2 more
core  

Paleozoic magmatism in the Nenjiang area, NE China: implications for the tectonic evolution of the Heihe-Hegenshan Suture

Frontiers in Earth Science
The timing and geodynamic processes of the transition from oceanic subduction to continental collision along the Heihe–Hegenshan Suture remain debated, particularly the relationship between initial collision and final amalgamation of the Xing’an and ...
Xinwei Wu, Xinchen Yuan, Zhaozhuo Ouyang, Changhai Li, Wanbing Song, Yuan Yao, Baoshan Liu, Jianmin Shi   +7 more
doaj   +1 more source

LA-ICP-MS Zircon U-Pb Dating and Geochemistry of Late Cretaceous Quartz Diorite in the Nuri Cu-Mo-W Deposit, South Tibet

Yankuang ceshi, 2015
The Nuri deposit is located at the south margin of the Gangdese metallogenic belt in Tibet. Its mineralization age revealed by Re-Os dating of molybdenite is 23 Ma, which is consistent with that of the Mingze and Chengba deposits.
DONG Sui-liang, HUANG Yong, LI Guang-ming, ZHANG Li, HUANG Han-xiao, ZHANG Hui   +5 more
doaj   +1 more source

Petrography and geochemistry of the Pedra Dourada Granulite, southeastern Minas Gerais, Brazil

REM: International Engineering Journal
The Pedra Dourada Granulite (PDG) occurs at the southeastern portion of the Araçuaí Belt, north of the town of Ponte Nova. It comprises bodies up to 45 km2 inserted into amphibolite-facies gneisses of the Mantiqueira Complex. Motivated by the discrepancy
Kassia de Souza Medeiros Marinho, Hanna Jordt-Evangelista, Marcelo de Souza Marinho   +2 more
doaj   +1 more source

Oxygen isotope evidence for crustal assimilation and magma mixing in the Granite Harbour Intrusives, Northern Victoria Land, Antarctica

, 2003
The stable isotope composition (O,H) of whole-rock and mineral separates of Cambrian-Ordovician gabbros, diorites, granodiorites and granites forming the Mt.
Dallai L, Sharp ZD, Ghezzo C
core   +2 more sources