Detrital zircon U–Pb geochronology from the Upper Carboniferous sediments of Benxi Formation in the North China Craton: implications for tectonic-sedimentary evolution

IF 2 4区 地球科学 Q3 GEOSCIENCES, MULTIDISCIPLINARY Comptes Rendus Geoscience Pub Date : 2020-11-04 DOI:10.5802/crgeos.17
Wuling Mo, Fang Liyong, Wei Guoqi, Liu Xinshe, Zhang Chunlin, L. Mancang, Su Nan, Liu Yan, Wu Saijun, Xing Fengcun
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引用次数: 1

Abstract

The provenance of the Upper Carboniferous Benxi Formation in North China Craton (NCC) has been considered as the northern margin of the NCC, not the North Qinling Orogenic Belt. To understand the provenance and the tectonic-sedimentary evolution during the sedimentary period of the Benxi Formation, the zircon U–Pb geochronology analysis was conducted on eleven clastic sandstone samples. The south of the NCC received clastic sediments from the North Qinling Orogenic Belt. The orogenic movements around the NCC in the Late Carboniferous period had significant impacts on the changes in paleotopography. During the early sedimentary period of the Hutian member of the Benxi Formation, the north of the Qinling Orogenic Belt was rapidly uplifted, and paleotopography was south-uplifting and north-dipping; thus, the clastic source was the North Qinling Orogenic Belt. From the late sedimentary period of the Benxi Formation Hutian member to the sedimentary period of the Jinci member, paleotopography was reversed. The northern margin of the NCC quickly uplifted, and paleotopography was north-uplifting and south-dipping. Two distinct provenances were present in the sediments of the Benxi Formation. The sediments were supplied predominately by the provenance in the north.
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华北克拉通本溪组上石炭统碎屑锆石U-Pb年代学及其构造-沉积演化意义
华北克拉通上石炭系本溪组的物源被认为是北秦岭造山带的北缘,而不是北秦岭造山地带。为了了解本溪组沉积期的物源和构造沉积演化,对11个碎屑砂岩样品进行了锆石U–Pb地质年代分析。北秦岭以南为北秦岭造山带碎屑沉积区。晚石炭世时期北秦岭周围的造山运动对古地形的变化产生了重大影响。本溪组湖田段早期沉积期,秦岭造山带北部快速抬升,古地形呈南抬北倾;碎屑来源于北秦岭造山带。本溪组湖田段沉积晚期至晋祠段沉积期,古地形发生逆转。北秦岭北缘快速隆起,古地形呈北隆南倾。本溪组沉积物中存在两种不同的物源。沉积物主要由北部的物源提供。
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来源期刊
Comptes Rendus Geoscience
Comptes Rendus Geoscience 地学-地球科学综合
CiteScore
2.80
自引率
14.30%
发文量
68
审稿时长
5.9 weeks
期刊介绍: Created in 1835 by physicist François Arago, then Permanent Secretary, the journal Comptes Rendus de l''Académie des sciences allows researchers to quickly make their work known to the international scientific community. It is divided into seven titles covering the range of scientific research fields: Mathematics, Mechanics, Chemistry, Biology, Geoscience, Physics and Palevol. Each series is led by an editor-in-chief assisted by an editorial committee. Submitted articles are reviewed by two scientists with recognized competence in the field concerned. They can be notes, announcing significant new results, as well as review articles, allowing for a fine-tuning, or even proceedings of symposia and other thematic issues, under the direction of invited editors, French or foreign.
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