Chemical indexes of Paleoproterozoic sedimentary rocks from Liaohe Group,North China Craton:Implications for paleoclimate and provenance  

作　　者：ZHANG Wei LI Zhuang YANG Fan PEI Fuping LIU Jin WANG Junhui WANG Zhiwei 

机构地区：[1]College of Geosciences,China University of Petroleum(Beijing),Beijing 102249,China [2]Key Laboratory of Mineral Resources Evaluation in Northeast Asia,Ministry of Natural ResourcesChangchun 130061,China [3]Hebei Key Laboratory of Strategic Critical Mineral Resources,Hebei GEO University,Shijiazhuang 050031,China [4]College of Earth Sciences,Jilin University,Changchun 130061,China [5]Key Laboratory of Regional Geology and Mineralization,Hebei GEO University,Shijiazhuang 050031,China

出　　处：《Global Geology》2021年第2期71-79,共9页世界地质（英文版）

基　　金：Supported by projects of Science Foundation of China University of Petroleum,Beijing (No.2462017YJRC032);National Natural Science Foundation of China (No.42002238);Innovation Training Program for College Students of China University of Petroleum,Beijing (No.ZHANGWEI-20-7);Opening Foundation of Key Laboratory of Mineral Resources Evaluation in Northeast Asia,Ministry of Natural Resources (Nos.DBY-KF-18-09 and DBY-KF-19-03)。

摘　　要：Paleoproterozoic supracrustal materials have been widely identified in North China Craton,such as the Liaohe-,Hutuo-and Lyuliang groups.The Liaohe Group in the eastern part of the North China Craton is dominated by deformed and metamorphosed sedimentary and volcanic successions.Compared with that of the coeval volcanic rocks,geochemistry of the sedimentary rocks from the Liaohe Group has rarely been studied in detail,which can possibly provide information on the paleoclimate and provenance.The authors analyzed the whole-rock and detrital zircon geochemistry of sedimentary rocks from the Liaohe Group against a uniform process and proposed their different ways of paleoweathering of the lower and upper formations.That is to say,although the lower and upper formations within the Liaohe Group might be derived from the similar source composition in a tectonically active setting,the paleoclimate that they experienced was not exactly the same.The predominant derivations are the Paleoproterozoic granitoids and basalts within the Liaohe Group,with minor input of Archean continental crust.This study highlights the contributions of the Paleoproterozoic mafic sources,which has been generally overlooked in the previous researches.

关 键 词：Liaohe Group PALEOPROTEROZOIC chemical index PALEOCLIMATE PROVENANCE 

分 类 号：P534.3[天文地球—古生物学与地层学] P588.2[天文地球—地质学]