Late Jurassic–Early Cretaceous tectonic evolution of the Great Xing’an Range: geochronological and geochemical evidence from granitoids and volcanic rocks in the Erguna Block, NE China

2019 ◽  
Vol 61 (15) ◽  
pp. 1842-1863 ◽  
Author(s):  
Jun Gou ◽  
De-You Sun ◽  
Zhen Qin
Keyword(s):  
Early Cretaceous ◽  
Tectonic Evolution ◽  
Late Jurassic ◽  
Volcanic Rocks ◽  
Ne China ◽  
Geochemical Evidence ◽  
Great Xing’An Range

Early Cretaceous crust–mantle interaction linked to rollback of the Palaeo-Pacific flat-subducting slab: constraints from the intermediate–felsic volcanic rocks of the northern Great Xing’an Range, NE China

2021 ◽  
pp. 1-22
Author(s):  
Jia-Hao Jing ◽  
Hao Yang ◽  
Wen-Chun Ge ◽  
Yu Dong ◽  
Zheng Ji ◽  
...  
Keyword(s):  
Early Cretaceous ◽  
Volcanic Rocks ◽  
Geochemical Data ◽  
Calc Alkaline ◽  
Ne China ◽  
Asthenospheric Mantle ◽  
High K ◽  
Wide Range ◽  
Great Xing’An Range ◽  
Subducting Slab

Abstract Late Mesozoic igneous rocks are important for deciphering the Mesozoic tectonic setting of NE China. In this paper, we present whole-rock geochemical data, zircon U–Pb ages and Lu–Hf isotope data for Early Cretaceous volcanic rocks from the Tulihe area of the northern Great Xing’an Range (GXR), with the aim of evaluating the petrogenesis and genetic relationships of these rocks, inferring crust–mantle interactions and better constraining extension-related geodynamic processes in the GXR. Zircon U–Pb ages indicate that the rhyolites and trachytic volcanic rocks formed during late Early Cretaceous time (c. 130–126 Ma). Geochemically, the highly fractionated I-type rhyolites exhibit high-K calc-alkaline, metaluminous to weakly peraluminous characteristics. They are enriched in light rare earth elements (LREEs) and large-ion lithophile elements (LILEs) but depleted in high-field-strength elements (HFSEs), with their magmatic zircons ϵHf(t) values ranging from +4.1 to +9.0. These features suggest that the rhyolites were derived from the partial melting of a dominantly juvenile, K-rich basaltic lower crust. The trachytic volcanic rocks are high-K calc-alkaline series and exhibit metaluminous characteristics. They have a wide range of zircon ϵHf(t) values (−17.8 to +12.9), indicating that these trachytic volcanic rocks originated from a dominantly lithospheric-mantle source with the involvement of asthenospheric mantle materials, and subsequently underwent extensive assimilation and fractional crystallization processes. Combining our results and the spatiotemporal migration of the late Early Cretaceous magmatic events, we propose that intense Early Cretaceous crust–mantle interaction took place within the northern GXR, and possibly the whole of NE China, and that it was related to the upwelling of asthenospheric mantle induced by rollback of the Palaeo-Pacific flat-subducting slab.

Petrogenesis and tectonic implications of Early Cretaceous volcanic rocks from the Shanghulin Basin within the north‐western Great Xing'an Range, NE China: Constraints from geochronology and geochemistry

2019 ◽  
Vol 55 (5) ◽  
pp. 3476-3496 ◽  
Author(s):  
An‐Qi Mao ◽  
De‐You Sun ◽  
Dong‐Guang Yang ◽  
Zong‐Yuan Tang ◽  
Han Zheng
Keyword(s):  
Early Cretaceous ◽  
Volcanic Rocks ◽  
Ne China ◽  
The North ◽  
Tectonic Implications ◽  
Great Xing’An Range ◽  
North Western

Geochronology and tectonic settings of Late Jurassic – Early Cretaceous intrusive rocks in the Ulanhot region, central and southern Da Xingan Range

2016 ◽  
Vol 154 (5) ◽  
pp. 923-945 ◽  
Author(s):  
CHANGFENG LIU ◽  
ZHIGUANG ZHOU ◽  
YONGJU TANG ◽  
CHEN WU ◽  
HONGYING LI ◽  
...  
Keyword(s):  
Early Cretaceous ◽  
Tectonic Evolution ◽  
Late Jurassic ◽  
Biotite Granite ◽  
Geochemical Characteristic ◽  
Ne China ◽  
Intrusive Rocks ◽  
Tectonic Settings ◽  
Tectonic System ◽  
Magmatic Event

AbstractZircon U–Pb dating and whole-rock geochemical analysis have been performed on Late Jurassic – Early Cretaceous intrusive rocks of the Ulanhot area, NE China, with the aim of constraining the tectonic evolution of the central and southern Da Xingan Range. Zircon U–Pb dating indicates that Late Jurassic – Early Cretaceous magmatic events experienced four stages at:c.155 Ma;c.144 Ma; 135–130 Ma; andc.126 Ma. Thec.155 Ma magmatic event consists of quartz diorite and granite-porphyryp with the geochemical characteristic of high Sr and Sr/Y or high A/CNK (1.38), implying the primary magma was derived from partial melting of a thickened lower crust which induced the closure of the Mongol–Okhotsk Ocean. Thec.144 Ma magmatic event consists of quartz monzodiorite with the geochemical characteristics of alkaline series, and indicates the delamination of a thickened crust. The 135–130 Ma magmatic event consists of syenogranite and granite-porphyry with characteristics of both I-type and A-type granites, which induced both the subduction of the Palaeo-Pacific oceanic plate and the post-orogenic extension of the Mongol–Okhotsk Orogenic Belt. Thec.126 Ma magmatic event consisted of highly fractionated I-type biotite granite and alkaline series gabbro, marking the end of the Mongol–Okhotsk Orogen, and implying that the study area was controlled by the circum-Pacific tectonic system during this stage.

Structure and tectonic evolution of the Late Jurassic–Early Cretaceous Wandashan accretionary complex, NE China

2018 ◽  
Vol 61 (1) ◽  
pp. 17-38 ◽  
Author(s):  
Han Zheng ◽  
Xiaomeng Sun ◽  
Kuo Wan ◽  
Pujun Wang ◽  
Song He ◽  
...  
Keyword(s):  
Early Cretaceous ◽  
Tectonic Evolution ◽  
Late Jurassic ◽  
Accretionary Complex ◽  
Ne China
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