Constraints on the timing of uplift of the Yanshan Fold and.pdf

下载文档

3
0
约6.01万字
约 17页
2017-04-09 发布于江苏
举报
版权申诉
保障服务

Constraints on the timing of uplift of the Yanshan Fold and.pdf

1、本文档共17页，可阅读全部内容。
2、有哪些信誉好的足球投注网站（book118）网站文档一经付费（服务费），不意味着购买了该文档的版权，仅供个人/单位学习、研究之用，不得用于商业用途，未经授权，严禁复制、发行、汇编、翻译或者网络传播等，侵权必究。
3、本站所有内容均由合作方或网友上传，本站不对文档的完整性、权威性及其观点立场正确性做任何保证或承诺！文档内容仅供研究参考，付费前请自行鉴别。如您付费，意味着您自己接受本站规则且自行承担风险，本站不退款、不进行额外附加服务；查看《如何避免下载的几个坑》。如果您已付费下载过本站文档，您可以点击这里二次下载。
4、如文档侵犯商业秘密、侵犯著作权、侵犯人身权等，请点击“版权申诉”（推荐），也可以打举报电话：400-050-0827(电话支持时间：9:00-18:30)。

Constraints on the timing of uplift of the Yanshan Fold and

tters 246 (2006) 336–352 /locate/epslEarth and Planetary Science LeConstraints on the timing of uplift of the Yanshan Fold and Thrust Belt, North China Jin-Hui Yang a,?, Fu-Yuan Wu a, Ji-An Shao b, Simon A. Wilde c, Lie-Wen Xie a, Xiao-Ming Liu d a State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences, P.O. Box 9825, Beijing 100029, China b Faculty of Earth and Space Sciences, Peking University, Beijing 100871, China c Department of Applied Geology, Curtin University of Technology, P.O. Box U1987, Perth, Western Australia 6845 d Key Laboratory of Continental Dynamics, Department of Geology, Northwest University, Xian 750069, China Received 4 January 2006; received in revised form 18 April 2006; accepted 18 April 2006Editor: R.W. CarlsonAbstract This paper reports in situ U–Pb ages and Hf isotopic data on detrital zircons from Paleozoic to Late Mesozoic strata in the Xishan area near Beijing that provide important constraints on the evolution and paleogeography of the northern part of the North China Craton (NCC). Zircons from Carboniferous to Late Mesozoic sandstones are characterized by three major groups of U–Pb ages (2.5–2.3 Ga, 1.9–1.7 Ga and Late Phanerozoic ages). The Neoarchean and Paleoproterozoic zircons, and some Phanerozoic zircons, have negative εHf(T) values, similar to igneous zircons from intrusive rocks known from the NCC, indicating that the source of the sandstones was locally derived. However, Late Triassic to Late Jurassic (205–158 Ma) sandstones contain a group of Phanerozoic zircons with positive εHf(T) values, distinct from known igneous zircons in the NCC, suggesting an exotic source. The nearest potential source is the Xing-Meng Orogenic Belt (XMOB) to the north of the NCC, where considerable amounts of juvenile crustal materials exist. It is concluded that there are two sudden shifts in source provenances of the Xishan sediments; from the NCC before the Late Triassic, to a mixed sou