Early Paleozoic collision-related magmatism in the eastern North Qilian orogen, northern Tibet: A linkage between accretionary and collisional orogenesis

2018 ◽  
Vol 131 (5-6) ◽  
pp. 1031-1056 ◽  
Author(s):  
Dong Fu ◽  
Timothy Kusky ◽  
Simon A. Wilde ◽  
Ali Polat ◽  
Bo Huang ◽  
...  
Keyword(s):  
Early Paleozoic ◽  
Northern Tibet ◽  
Qilian Orogen ◽  
North Qilian ◽  
Collisional Orogenesis

scholarly journals Petrogenesis of Early Paleozoic high Sr/Y intrusive rocks from the North Qilian orogen: Implication for diachronous continental collision

Lithosphere ◽  
2019 ◽  
Vol 12 (1) ◽  
pp. 53-73 ◽  
Author(s):  
He Yang ◽  
Hongfei Zhang ◽  
Wenjiao Xiao ◽  
Biji Luo ◽  
Zhong Gao ◽  
...  
Keyword(s):  
Crustal Thickness ◽  
Crustal Thickening ◽  
Geochemical Data ◽  
Thickness Variation ◽  
Early Paleozoic ◽  
Isotopic Data ◽  
Differential Distribution ◽  
The North ◽  
Qilian Orogen ◽  
North Qilian

Abstract A combination of U-Pb zircon ages and geochemical and Sr-Nd-Hf isotopic data are presented for the Early Paleozoic granodiorites from the Haoquangou and Baimawa plutons in order to probe the crustal thickness variation of the eastern North Qilian and the diachronous evolution of the North Qilian orogen. The granodiorites formed at 436–435 Ma and have high Sr/Y ratios (63–117). Elemental and isotopic data combined with geochemical modeling and comparisons with experimental data suggest that they were produced from the melting of relatively juvenile mafic rocks in the thickened lower crust. Together with other petrological and geochemical data and the calculation of variation in crustal thickness, this indicates that the eastern North Qilian experienced clear crustal thickening and thinning from the Late Ordovician to Late Silurian. Based on available data, we suggest that diachronous collision from east to west, which probably resulted in the distinct intensity of orogenesis between eastern and western North Qilian, can well account for the differential distribution of Early Paleozoic high Sr/Y magmatism and other geological differences between the eastern and western parts of the North Qilian. Our study also implies that diachronous collision may lead to, apart from distinct metamorphic, structural and sedimentary responses, the large differences in magmatism and deep crustal processes along the orogenic strike.

Petrogenesis and tectonic evolution of the Palaeozoic to Mesozoic Niuxinshan granitoids in the North Qilian orogen, NW China

2021 ◽  
Author(s):  
Fan Yang ◽  
Fei Xue ◽  
M. Santosh ◽  
Zesheng Qian ◽  
Cun Zhang ◽  
...  
Keyword(s):  
Tectonic Evolution ◽  
Nw China ◽  
The North ◽  
Qilian Orogen ◽  
North Qilian

scholarly journals On the origin of mafic magmatic enclaves (MMEs) in syn-collisional granitoids: evidence from the Baojishan pluton in the North Qilian Orogen, China

2015 ◽  
Vol 109 (5) ◽  
pp. 577-596 ◽  
Author(s):  
Shuo Chen ◽  
Yaoling Niu ◽  
Wenli Sun ◽  
Yu Zhang ◽  
Jiyong Li ◽  
...  
Keyword(s):  
The North ◽  
Magmatic Enclaves ◽  
Qilian Orogen ◽  
North Qilian

Finding of Neoproterozoic (∼775 Ma) magmatism recorded in metamorphic complexes from the North Qilian orogen: Evidence from SHRIMP zircon U-Pb dating

2006 ◽  
Vol 51 (8) ◽  
pp. 963-970 ◽  
Author(s):  
Chien-Yuan Tseng ◽  
Houng-Yi Yang ◽  
Wan Yusheng ◽  
Liu Dunyi ◽  
Da-Jen Wen ◽  
...  
Keyword(s):  
The North ◽  
Qilian Orogen ◽  
Shrimp Zircon ◽  
North Qilian ◽  
Metamorphic Complexes

Geochemical constraints on the protoliths of eclogites and blueschists from North Qilian, northern Tibet

2016 ◽  
Vol 421 ◽  
pp. 26-43 ◽  
Author(s):  
Long Zhang ◽  
Ren-Xu Chen ◽  
Yong-Fei Zheng ◽  
Zhaochu Hu ◽  
Yueheng Yang ◽  
...  
Keyword(s):  
Northern Tibet ◽  
Geochemical Constraints ◽  
North Qilian

Compositional and Sr–Nd–Hf isotopic variations of Baijingsi eclogites from the North Qilian orogen, China: Causes, protolith origins, and tectonic implications

2015 ◽  
Vol 28 (2) ◽  
pp. 721-734 ◽  
Author(s):  
Choon-Muar Ker ◽  
Huai-Jen Yang ◽  
Jianxin Zhang ◽  
Yen-Hong Shau ◽  
Chia-Ju Chieh ◽  
...  
Keyword(s):  
The North ◽  
Tectonic Implications ◽  
Qilian Orogen ◽  
Isotopic Variations ◽  
North Qilian

scholarly journals Boninitic blueschists record subduction initiation and subsequent accretion of an arc–forearc in the northeast Proto-Tethys Ocean

Geology ◽  
2021 ◽  
Author(s):  
Dong Fu ◽  
Bo Huang ◽  
Tim E. Johnson ◽  
Simon A. Wilde ◽  
Fred Jourdan ◽  
...  
Keyword(s):  
Subduction Zones ◽  
Plate Tectonics ◽  
Oceanic Lithosphere ◽  
Island Arc ◽  
Early Paleozoic ◽  
Subduction Initiation ◽  
North Qilian Orogenic Belt ◽  
Mariana Arc ◽  
Tethys Ocean ◽  
North Qilian

Subduction of oceanic lithosphere is a diagnostic characteristic of plate tectonics. However, the geodynamic processes from initiation to termination of subduction zones remain enigmatic mainly due to the scarcity of appropriate rock records. We report the first discovery of early Paleozoic boninitic blueschists and associated greenschists from the eastern Proto-Tethyan North Qilian orogenic belt, northeastern Tibet, which have geochemical affinities that are typical of forearc boninites and island arc basalts, respectively. The boninitic protoliths of the blueschists record intra-oceanic subduction initiation at ca. 492–488 Ma in the eastern North Qilian arc/forearc–backarc system, whereas peak blueschist facies metamorphism reflects subsequent subduction of the arc/forearc complex to high pressure at ca. 455 Ma. These relations therefore record the life circle of an intra-oceanic subduction zone within the northeastern Proto-Tethys Ocean. The geodynamic evolution provides an early Paleozoic analogue of the early development of the Izu–Bonin–Mariana arc and its later subduction beneath the extant Japanese arc margin. This finding highlights the important role of subduction of former upper plate island arc/forearcs in reducing the likelihood of preservation of initial subduction-related rock records in ancient orogenic belts.

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