Time constraints for the closing of the Paleo-Asian Ocean in the Northern Alxa Region: Evidence from Wuliji granites

Zhang, Wen; Wu, Taotao; Feng, Jie; Zheng, Rongguo; He, Yumei

doi:10.1007/s11430-012-4435-y

Cited by 56 publications

(31 citation statements)

References 45 publications

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“…For instance, the source rocks for the coarse fraction of sample B14 are probably the A-type granite. Regional geological setting confirms that A-type granite is widely distributed near the site of B14 (Zhang et al, 2013b). The La and Th shows a good linear relationship for all samples and their different grain size fractions (Fig.…”

Section: Types Of Main Source Rocks Of the Aeolian Sedimentssupporting

confidence: 62%

Geochemical and geomorphological evidence for the provenance of aeolian deposits in the Badain Jaran Desert, northwestern China

Yang

2016

Quaternary Science Reviews

128

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Section: Types Of Main Source Rocks Of the Aeolian Sedimentssupporting

confidence: 62%

Geochemical and geomorphological evidence for the provenance of aeolian deposits in the Badain Jaran Desert, northwestern China

Yang

2016

Quaternary Science Reviews

128

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“…Comparison of the age distributions of the Permian volcanic‐sedimentary rocks from the southwestern Alxa (a) with magmatic records of the Alxa Tectonic Belt (b), southern Beishan Orogenic Belt (c), and southern Mongolia (d). Age sources for Alxa magmatic rocks (b) are from Dan, Li, Wang, Tang, et al (), Feng et al (), Liu et al (), Q. Liu, Zhao, Han, Eizenhofer, Zhu, Hou, and Zhang (), Q. Liu, Zhao, Han, Eizenhofer, Zhu, Hou, Zhang, and Wang (), Ran et al (), X. J. Shi et al (), G. Z. Shi et al (), W. Zhang et al (), J. J. Zhang, Wang, et al (), Zhang et al (), Zheng et al (), and Zhou et al (). Age sources for southern Beishan (c) are from Song et al () and W. Zhang et al ().…”

Section: Discussionmentioning

confidence: 99%

Final Subduction Processes of the Paleo‐Asian Ocean in the Alxa Tectonic Belt (NW China): Constraints From Field and Chronological Data of Permian Arc‐Related Volcano‐Sedimentary Rocks

et al. 2018

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The timing of final subduction and closure of the Paleo-Asian Ocean (PAO) is controversial.Located in a key position within the southern Central Asian Orogenic Belt, the Alxa Tectonic Belt (ATB) provides a crucial window to evaluate the final subduction processes of the PAO. This study presents field and geochronological data for Permian volcano-sedimentary rocks from the southwestern ATB. Field observations revealed a syntectonic unconformity between the Middle and Upper Permian strata. Detrital zircon U-Pb analyses show a major peak at~273 Ma and a subordinate peak at~440 Ma for the Middle Permian sample. The Upper Permian samples show consistently unimodal age spectra with single peaks at 261 and~263 Ma, respectively. The Permian zircons from the analyzed samples yield predominately positive ε Hf (t) values, indicating major juvenile magmatic processes mixed with limited recycled Precambrian basement. The diagnostic zircon U-Pb-Hf isotopic characteristics and ubiquitous intermediate and felsic volcanic detritus in these rocks indicate rapid sediments accumulation sourced from a proximal magmatic terrane in a suprasubduction zone environment. The Paleozoic zircon U-Pb age peaks from this study are comparable to those for the Permian arc-related sediments along the Solonker Suture Zone, thus linking the Alxa active margin with the northern margin of the North China Craton during Middle-Late Permian times. Our study thus provides key constraints for the final subduction processes of the PAO, documented within the ATB, before the terminal amalgamation of the southern Central Asian Orogenic Belt.

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“…[Zhang et al, 2013;Shi et al, 2014aShi et al, , 2014b), and granitoids in the south belt formed from the late stage of Early Paleozoic to the Late Permian (e.g. [Li, 2006;Dan et al, 2016]).…”

Section: P a L E O G E O D Y N A M I C Smentioning

confidence: 99%

“…Voluminous intrusive and extrusive rocks outcrop in the northern Alxa block and adjacent southern CAOB. Most of them are thought to be related to the closure of the Paleo-Asia Ocean and subsequent collision [Wu, 1993;Wu et al, 1998;Zhang et al, 2013;Dan et al, 2016].…”

mentioning

confidence: 99%

Late Paleozoic subduction system in the northern margin of the Alxa block, Altaids: Geochronological and geochemical evidences from ophiolites

et al. 2014

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Time constraints for the closing of the Paleo-Asian Ocean in the Northern Alxa Region: Evidence from Wuliji granites

Cited by 56 publications

References 45 publications

Geochemical and geomorphological evidence for the provenance of aeolian deposits in the Badain Jaran Desert, northwestern China

Geochemical and geomorphological evidence for the provenance of aeolian deposits in the Badain Jaran Desert, northwestern China

Final Subduction Processes of the Paleo‐Asian Ocean in the Alxa Tectonic Belt (NW China): Constraints From Field and Chronological Data of Permian Arc‐Related Volcano‐Sedimentary Rocks

Late Paleozoic subduction system in the northern margin of the Alxa block, Altaids: Geochronological and geochemical evidences from ophiolites

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