| 吉南地区古元古代地层层序及构造背景 |
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| 引用本文： | 赵冰仪,周晓东.吉南地区古元古代地层层序及构造背景[J].世界地质,2009,28(4):424-429. |
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| 作者姓名： | 赵冰仪 周晓东 |
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| 作者单位： | 1. 中国地质大学地球科学与资源学院, 北京100083; 2. 吉林省区域地质矿产调查所, 长春130012 |
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| 摘 要： | 依据变质岩石组合特征及其在地层序列中的堆叠关系, 吉南地区古元古代集安岩群自下而上可划分为蚂蚁河岩组、荒岔沟岩组、大东岔岩组, 其沉积时限为2 350～2 150 Ma, 经历了低压相系高角闪岩相的变质作用, 并被晚期花岗岩侵入(2 160 Ma) ; 老岭群自下而上可划分为达台山组/林家沟组、珍珠门组、花山组、临江组、大栗子组, 其沉积时限为1 900～1 800 Ma, 经历了中压相系低角闪岩相的变质作用。集安岩群伏于老岭群之下, 原岩建造为一套大陆拉斑玄武岩-蒸发岩-(钙质)硬砂岩-复理石组合, 属裂谷环境沉积; 老岭群的原岩建造为一套石英砂岩-白云岩-页岩组合, 属陆内坳陷沉积。
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| 关 键 词： | 古元古代 地层层序 吉南地区 |
| 收稿时间： | 2009-10-18 |
| 修稿时间： | 2009-11-18 |
Paleoproterozoic strata sequence and tectonic setting in southern Jilin Province |
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| ZHAO Bing-yi,ZHOU Xiao-dong.Paleoproterozoic strata sequence and tectonic setting in southern Jilin Province[J].World Geology,2009,28(4):424-429. |
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| Authors: | ZHAO Bing-yi ZHOU Xiao-dong |
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| Institution: | 1. School of the Earth Sciences and Resources, China University of Geosciences, Beijing 100083, China; 2. Regional Survey of Geology & Mineral Resources, Jilin Province, Changchun 130012, China |
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| Abstract: | Based on the assemblage characteristics of metamorphic rocks and their stacking relations in the stratigraphic sequence, Paleoproterozoic Jipan Group in southern Jilin can be divided into Mayihe, Huangchagou and Dadongcha formations in descending order, deposited ranging from 2 350 to 2 150 Ma in age, which underwent high amphibolite faciesmetamorphism of low-pressure facies and invaded by late granites at 2 160 Ma. The Laoling Group can be divided into Dataishan /Linjiagou, Zhenzhumen, Huashun, Linjiang and Dalizi formations in descending order, ranging from 1 900 to 1 800 Ma in age, which underwent low amphibolite faciesmetamorphism of mid-pressure facies. The Jipan Group underlies the Laoling Group. The primary rock formation of the Jipan Group is a combination of continental tholeiite-evaporite-( calcareous) graywacke-flysch and belongs to rift environment sedimentation, and the primary rock formation of the Laoling Group is quartz sandstone-dolomite-shale and belongs to intra-continental depression sedimentation. |
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| Keywords: | Paleoproterozoic strata sequence southern Jilin Province |
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