Middle-Late Mesozoic sedimentary provenances of the Luxi and Jiaolai areas: Implications for tectonic evolution of the North China Block

doi:10.1016/j.jseaes.2015.07.008

CORC > 地质与地球物理研究所 > 中国科学院地质与地球物理研究所 > 岩石圈演化国家重点实验室

	Middle-Late Mesozoic sedimentary provenances of the Luxi and Jiaolai areas: Implications for tectonic evolution of the North China Block
	Xu, Jianqiang 1,2; Li, Zhong 1
刊名	JOURNAL OF ASIAN EARTH SCIENCES
	2015-11-01
卷号	111 页码:284-301
关键词	Middle-late Mesozoic Detrital Provenance Zircon Geochronology Garnet Geochemistry North China Block Tectonic Evolution
DOI	10.1016/j.jseaes.2015.07.008
文献子类	Article
英文摘要	Provenances of sedimentary rocks may provide important constraints on the tectonic evolution of the North China Block (NCB). Previous studies have demonstrated that the northern NCB (NNCB) and the Xing-Meng orogenic belt (XMOB) supplied massive detritus southward into the hinterland of the NCB during the Jurassic. In order to study the evolution of sedimentary provenance during the Middle-Late Mesozoic, U-Pb geochronology and Hf isotopic geochemistry of detrital zircon grains and chemical compositions of detrital garnets from sandstones in the Luxi and Jiaolai areas, eastern NCB, were analyzed in combination with published data on the Jurassic sandstones. The Late Paleozoic-Mesozoic (367-139 Ma) zircons in the lowermost Cretaceous Mengyin Formation samples from the Luxi area show epsilon Hf(t) values of -15.3 to -3.2 and +1.3 to +10.0, which are very similar to the results of analyses of the Jurassic formations. Further, the increased amount of Mesozoic zircons and granulite-derived garnets in the Mengyin Formation samples, compared to those in the Jurassic samples, indicates there was more detritus supply from the NNCB than from the XMOB. In the overlying Qingshan Formation samples, zircon grains do not exhibit Paleozoic ages, but most of them have Early Cretaceous ages and negative epsilon Hf(t) values, which are similar to the zircon grains extracted from the widespread Early Cretaceous igneous rocks in the NCB. This suggests that the provenance might have changed to a locally derived source. In contrast, the zircon population of the Early Cretaceous sandstones from the Jiaolai basin is dominated by grains of mid-Neoproterozoic age (700-900 Ma) which signifies contribution from the Sulu orogen. Moreover, the detrital garnet assemblages of sandstones in the Luxi area are not consistent with those from representative metamorphic rocks in the Sulu orogen. The above results seem to confirm that the Mesozoic sedimentary provenance of the Luxi area had no evident connection with the Sulu orogen. Instead, the differential uplifting and exhumation of deep crustal rocks in the NNCB and the XMOB, associated with closure of the Mongol-Okhotsk Ocean, might exert a dominant control on sedimentary provenances in the wide hinterland of the NCB from the Jurassic period to similar to 136 Ma (the upper boundary age of the Mengyin Formation). (c) 2015 Elsevier Ltd. All rights reserved.
WOS关键词	ZIRCON U-PB ; MONGOL-OKHOTSK OCEAN ; PRESSURE METAMORPHIC ROCKS ; ARCHEAN CRUSTAL EVOLUTION ; WESTERN SHANDONG PROVINCE ; HF ISOTOPIC COMPOSITIONS ; DETRITAL ZIRCON ; VOLCANIC-ROCKS ; EASTERN CHINA ; NE CHINA
WOS研究方向	Geology
语种	英语
WOS记录号	WOS:000362603300020
资助机构	National Natural Science Foundation of China(40672083 ; National Natural Science Foundation of China(40672083 ; National Natural Science Foundation of China(40672083 ; National Natural Science Foundation of China(40672083 ; 41172096) ; 41172096) ; 41172096) ; 41172096) ; National Natural Science Foundation of China(40672083 ; National Natural Science Foundation of China(40672083 ; National Natural Science Foundation of China(40672083 ; National Natural Science Foundation of China(40672083 ; 41172096) ; 41172096) ; 41172096) ; 41172096)
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/62211]
专题	地质与地球物理研究所_岩石圈演化国家重点实验室
作者单位	1.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Xu, Jianqiang,Li, Zhong. Middle-Late Mesozoic sedimentary provenances of the Luxi and Jiaolai areas: Implications for tectonic evolution of the North China Block[J]. JOURNAL OF ASIAN EARTH SCIENCES,2015,111:284-301.
APA	Xu, Jianqiang,&Li, Zhong.(2015).Middle-Late Mesozoic sedimentary provenances of the Luxi and Jiaolai areas: Implications for tectonic evolution of the North China Block.JOURNAL OF ASIAN EARTH SCIENCES,111,284-301.
MLA	Xu, Jianqiang,et al."Middle-Late Mesozoic sedimentary provenances of the Luxi and Jiaolai areas: Implications for tectonic evolution of the North China Block".JOURNAL OF ASIAN EARTH SCIENCES 111(2015):284-301.