Formation and metamorphism of sedimentary rocks beneath the Dingxi Basin: Record of the evolution from subduction to collision in the North Qilian Orogen

Terra Nova ◽  
2020 ◽  
Vol 32 (3) ◽  
pp. 198-204
Author(s):  
Bin Wang ◽  
Wei‐(RZ) Wang ◽  
Zuoling Tian ◽  
Chunjing Wei ◽  
Yue Zhao
Keyword(s):  
Sedimentary Rocks ◽  
The North ◽  
Qilian Orogen ◽  
North Qilian

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

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

Detrital zircon U-Pb and Hf isotopes study of the Longshoushan Belt in the southwestern margin of the Alxa Block: Constraints on the tectonic evolution and affinity of the Alxa Block

2020 ◽  
Author(s):  
Jingna Liu ◽  
Changqing Yin ◽  
Jian Zhang ◽  
Jiahui Qian ◽  
Kaiyuan Xu ◽  
...  
Keyword(s):  
North China Craton ◽  
Tectonic Evolution ◽  
North China ◽  
Sedimentary Rocks ◽  
Foreland Basin ◽  
Hexi Corridor ◽  
Detrital Zircons ◽  
The North ◽  
Southwestern Margin ◽  
North Qilian

<p>     The tectonic evolution and affinity of the Alxa Block has long been controversial. The NW-SE trending Longshoushan Belt is in the southwestern margin of the Alxa Block, separated the Qilian Block. In this study, we present zircon U-Pb and Hf-isotope data of the middle and eastern Longshoushan, which could constrain the provenance and formation age of the Longshoushan Belt, and further constrain the tectonic evolution and affinity of the Alxa Block. The U-Pb ages of the detrital zircons from the amphibolite-facies metamorphosed volcanic-sedimentary rocks of the middle Longshoushan range from 3006 to 1981 Ma (peak at 2010 Ma), which were consistent with the Alxa Block and the western North China Craton, indicating that the middle Longshoushan was deposited in the Palaeoproterozoic, not in the Archean, and had tectonic affinity with the Alxa Block and the western North China Carton. Combined with the identical crustal growth events at 2.4-2.5 Ga of the middle Longshoushan, the Alxa Block and the western North China Craton, the Alxa Block was an integrated part of the Western Block of the North China Craton. The U-Pb ages of the detrital zircons from the greenschist-facies metamorphosed volcanic-sedimentary rocks of the eastern Longshoushan range from 3389 to 529 Ma (peak at 2.5 Ga and 1.0 Ga), which were highly consistent with Hexi Corridor, indicating that the eastern Longshoushan was deposited in the Cambrian, and had an affinity with the Hexi Corridor. In the Early Palaeozoic, the North Qilian Ocean subducted the Alxa Block and formed a typical trench-arc-basin system. With the closure of the North Qilian Ocean, the Central Qilian Block collided with the Alxa Block, formed the eastern Longshoushan, which was a foreland basin in the Hexi Corridor.</p>

Partial melting of thickened lower crust in post‐collisional setting: Evidence from high silicon adakitic granites in the North Qilian orogen

2019 ◽  
Vol 55 (5) ◽  
pp. 3990-4007
Author(s):  
Yun‐shuai Li ◽  
Liang‐jia Xu ◽  
Sheng‐yao Yu ◽  
Jian‐xin Zhang ◽  
Jing Guo ◽  
...  
Keyword(s):  
Partial Melting ◽  
Lower Crust ◽  
The North ◽  
High Silicon ◽  
Qilian Orogen ◽  
North Qilian

Integrated analyses constraining the provenance of sandstones, mudstones, and conglomerates, a case study: the Laojunshan conglomerate, Qilian orogen, northwest China

2007 ◽  
Vol 44 (7) ◽  
pp. 961-986 ◽  
Author(s):  
Zhen Yan ◽  
Wenjiao Xiao ◽  
Zongqi Wang ◽  
Jilian Li
Keyword(s):  
Tibetan Plateau ◽  
Middle Devonian ◽  
Tectonic Setting ◽  
Active Continental Margin ◽  
Geochemical Data ◽  
The North ◽  
Northern Tibetan Plateau ◽  
Wide Range ◽  
Qilian Orogen ◽  
North Qilian

The Qilian orogenic belt in the northern Tibetan plateau connects the Altaids to the north with the Tethyan orogenic system to the south and occupies a key tectonic position in the evolution and assembly of Asia. The belt contains a wide range of subduction–accretion-related petrotectonic units. The Early–Middle Devonian Laojunshan conglomerate, deposited unconformably upon Cambrian–Silurian strata along the northern margin of the North Qilian terrane, contains a record of the late Paleozoic tectonism of the Qilian orogen. Its provenance and tectonic setting are critical in understanding not only the tectonic evolution of Tibetan plateau, but Paleozoic global reconstructions as well. The composition of clastic conglomerates and heavy mineral assemblages of sandstones suggests that coeval mafic, felsic, metamorphic, and sedimentary rocks were the main sources. The geochemistry of volcanic clasts and paleocurrent and paleogeographic data suggest derivation from subduction–accretion complexes in the North Qilian terrane. The geochemistry of siltstones and mudstones indicates that the Laojunshan conglomerate was derived from an arc and accumulated in an active continental margin. Geochemical data of granitoid clasts suggest that they were derived from Ordovician–Silurian subduction-related magmatic rocks. Mafic and ultramafic clasts, chromite, and magnetite decrease upwards in the stratigraphy whereas metamorphic, sedimentary and granitoid clasts, and garnet increase. These data imply that mafic rocks were the predominant source during initial deposition. Regional studies suggest that the North China plate subducted southwards and produced subduction-related arc magmatism along the southern margin of the North Qilian terrane during the Early–Middle Devonian. Therefore, we interpret the Laojunshan conglomerate as a fore-arc basin fill.

Tectonics of the North Qilian orogen, NW China

2013 ◽  
Vol 23 (4) ◽  
pp. 1378-1401 ◽  
Author(s):  
Shuguang Song ◽  
Yaoling Niu ◽  
Li Su ◽  
Xiaohong Xia
Keyword(s):  
Nw China ◽  
The North ◽  
Qilian Orogen ◽  
North Qilian
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