2022年10月1日 · We present results from petrology, zircon U-Pb geochronology and Lu-Hf isotope, whole-rock major, trace and REE geochemistry, and Sr-Nd isotopes of the pre- and syn-collisional granitoids in the North Qaidam orogen to constrain their typology, magma source, evolution process, as well as petrogenesis.

2022年4月1日 · The mechanisms for magma generation during syn-collision include: (1) minor crust-derived peraluminous magmatism generated by crustal shear heating (Harris et al., 1986) or heating from small-scale mantle flow (Magni et al., 2012); and, (2) large-scale magmatism due to enhanced mantle wedge flow in response to slab rollback during the ...

2012年10月18日 · The alkaline intrusives in the Sulu orogen are a product of syn-exhumation magmatism during the Triassic continental collision. They share many geochemical features with the UHP metaigneous rocks in common.

2020年3月10日 · Based on bulk-rock compositions and zircon U-Pb age-dating, recent studies on these two plutons proposed that MMEs represent cumulates crystallized early from the same magmatic system as their host granitoids, and their parental melts are best understood as andesitic magmas produced by partial melting of the underthrusting upper ocean crust ...

2022年1月19日 · Here, we tested the collision-zone model by investigating the existence, temporal-spatial distribution, geochemical signatures, and possible sources of the syn-collisional MBGs. We applied deep learning (DL) algorithm and principal component analysis (PCA) to the database GEOROC and Tibetan Magmatism Database.

2015年5月19日 · In collisional orogens, due to continental deep subduction and significant crustal thickening, the UHP metamorphosed oceanic and continental crusts will experience decompression melting during exhumation, generating syn-collisional magmatism.

2021年1月5日 · Mechanisms of syn-collision magma generation are unclear due to the uncertainty in defining the term collision. We address this issue by presenting detailed petrographic, chronological, and...

2020年1月1日 · Syn-exhumation mafic igneous rocks of late Cambrian occur in the Qinling orogen. Their mantle source formed by melt-peridotite reaction during oceanic subduction. Mafic magmatism was due to extensional exhumation of subducted continental crust.

2015年4月22日 · This analysis points to a genetic link between the magmatism and continental collision (Mo et al. 2008) for juvenile continental crust accretion and rules out the significance of intra-oceanic island arc or continental arc magmatism in space and time in continental crust accretion in the standard model.

2019年12月1日 · Mafic arc-like magmatism is rare during continental collision, but its products provide valuable information on the geochemical processes during plate convergence. Such rocks were found in...