Results 91 to 100 of about 49,268 (212)

Petrogenesis and Tectonic Implication of the Newly Identified Rhyacian and Orosirian Orthogneisses in the Northwestern Part of the Gyeonggi Massif (Soyeonpyeongdo and Ganghwado Areas), South Korea: Constrained From Whole‐Rock Geochemistry and Zircon U‐Pb‐Hf Isotopic Compositions

Geochemistry, Geophysics, Geosystems
The Gyeonggi Massif is one of the major Precambrian basements in the Korean Peninsula where Paleoproterozoic orthogneiss and paragneiss were widely exposed.
Seung Hwan Lee, Deung‐Lyong Cho, Jeong‐Yeong Park, Sung Won Kim, Byung Choon Lee, Mingguo Zhai   +5 more
doaj   +1 more source

Remelting of Ordovician migmatites and granites during Variscan high-grade metamorphism (Aar Massif, Central Alps, Switzerland) [PDF]

Swiss Journal of Geosciences
The remelting of felsic gneisses, migmatites and granite during a later orogenic cycle can produce rocks of different age with comparable field appearance, microstructure, mineralogical and chemical composition.
Urs Schaltegger, Alfons Berger, Jürgen Abrecht, Alexey Ulianov, Eliana Noroña Muñoz, Daniela Rubatto, Maria Ovtcharova, Agathe Martignier, Richard Spikings, Michael Wiederkehr   +9 more
doaj   +3 more sources

The Cadomian late-orogenic alkaline magmatism in the Ossa-Morena Zone (Iberian Massif): preliminary cartography, petrography, and geochemistry of the Almedral massif

, 1999
The Almendral massif is located in the north-western branch of the Olivenza-Monesterio antiform (Ossa Morena Zone, Iberian Massif, Spain). The pluton is composed by gabbros, sienites and alkaline granites which define an alkaline/transitional association.
Alonso Olazabal, Ainhoa, Sánchez Carretero, R., Carracedo Sánchez, Manuel, Eguiluz, Luis   +3 more
core  

The role of mantle melting and associated granitoid magmatism in the genesis of orogenic gold in the Laurentian Caledonides [PDF]

Orogenic gold vein deposits are an economically important, well-documented mineralization class with limited consensus regarding the role of juvenile magmatism in their genesis.
Shaw, James I., Boyce, Adrian J., Lyell, Calum M., Cloutier, Jonathan, Stuart, Finlay M.   +4 more
core   +1 more source

The bending of a supra-subduction zone produced crustal thickening and arc migration of the Mongolian Orocline

Communications Earth & Environment
Orogenic curvatures have been widely recognized along global convergent plate boundaries. Understanding the impact of such curvatures on the tectonic evolution of orogens and their three-dimensional architecture has been challenging. Here we address this
Jiaqi Ling, Pengfei Li, Chao Yuan, Gideon Rosenbaum, Min Sun, Zhen Li, Tserendash Narantsetseg   +6 more
doaj   +1 more source

Syn-to post-orogenic mineralization in the Shuangkoushan Au–Ag–Pb deposit, North Qaidam: insights from H–O–S isotopes and U–Pb geochronology

Frontiers in Earth Science
The Shuangkoushan Au–Ag–Pb deposits, hosted within meta-basaltic rocks of the Tanjianshan Group in the North Qaidam Orogenic Belt, northwest China, present significant insights into syn-to post-orogenic mineralization processes.
Junzhen Yu, Junzhen Yu, Dexian Li, Dexian Li, Youye Zheng, Youye Zheng, Bo Ma, Bo Ma, Jian Wang, Jian Wang, Guomei Shi, Guomei Shi, Rongke Xu, Junaid Khan, Asma Tahir   +14 more
doaj   +1 more source

MAGMATISM OF THE DON TERRANE VOLGA-DON OROGEN

Proceedings of the Karelian Research Centre of the Russian Academy of Sciences, 2022
Marina Petrakova, Konstantin Savko, Shauket Baltybaev   +2 more
openaire   +1 more source

Paleozoic Episodic Magmatism in Western Tianshan: Insight Into Assembling the Northeastern Pangea

Geochemistry, Geophysics, Geosystems
The late‐stage union of Pangea was associated with the convergence of Siberia with Laurussia, but the exact timing remains unclear. The orogenic duration of the Kazakhstan block can provide geochronological constraints as it connects Siberia, Baltica ...
Kai Wang, Keda Cai, Min Sun, Chun‐Kit Lai, Xiao‐Ping Xia, Xiangsong Wang, Zihe Bao   +6 more
doaj   +1 more source

Chronology and Genesis of Fine-grained Granite in the Southern Area of Le’an, Central Jiangxi

Donghua Ligong Daxue Xuebao. Ziran Kexue Ban
[Objective] This study investigates the petrogenesis and tectonic setting of fine-grained granites exposed in the southern Le'an area. Determining the origin and emplacement environment of these granites is important for understanding regional magmatic ...
CHEN Yu, ZHANG Shuming, LIU Long, SHEN Yujie   +3 more
doaj   +1 more source

Temporal, isotopic and spatial relations of early Paleozoic Gondwana-margin arc magmatism, Central Transantarctic Mountains, Antarctica

, 2012
The Cambrian^Ordovician Ross Orogeny in Antarctica produced a voluminous magmatic belt composed mainly of post-orogenic granit-oids.This magmatic belt has strong calc-alkaline characteristics re-flecting a convergent-margin origin associated with ...
C. Mark Fanning, Marc D. Norman, Vickie C. Bennett, John W. Goodge   +3 more
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