| 大别造山带北缘石炭系胡油坊组砾石特征及其构造意义 |
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| 引用本文： | 李双应,李任伟,岳书仓,王道轩,刘因,孟庆任,金福全.大别造山带北缘石炭系胡油坊组砾石特征及其构造意义[J].地层学杂志,2003,27(2):116-121,T001. |
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| 作者姓名： | 李双应 李任伟 岳书仓 王道轩 刘因 孟庆任 金福全 |
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| 作者单位： | 1. 合肥工业大学资源与环境工程学院,安徽,合肥,230009
2. 中国科学院地质与地球物理研究所,北京,100027 |
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| 基金项目： | 国家重点基础研究发展规划项目 (编号 :G19990 75 5 0 7)资助。 |
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| 摘 要： | 大别造山带北缘晚石炭世胡油坊组内含有一套岩块砾岩层 ,砾石主要由绿片岩相的石英片岩、绢云母石英片岩、石英岩和千枚岩组成 ,其次有变余砂岩和碳酸盐岩等。Rb- Sr同位素测定表明 ,绿片岩相砾石经历了晚元古代末期和晚古生代两期变质事件 ,全岩等时线年龄为 5 6 5± 30 Ma和 30 7Ma。变质岩砾石不是来源于佛子岭群或信阳群 ,而可能来自于扬子陆块的中、晚元古代地层。砾石以及古生物的证据还表明 ,大别山在古生代时存在一个主要由扬子陆块早古生代碳酸盐岩和中、晚元古代变质岩组成的构造剥露区 ,不存在一个大别山古岛弧。
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| 关 键 词： | 变质岩砾石 石炭纪 胡油坊组 物源区 扬子陆块 大别山北缘 安徽 |
| 文章编号： | 0253-4959(2003)02-0116-06 |
GRAVEL FEATURES AND TECTONIC IMPLICATION IN THE CARBONIFEREOUS HUYOUFANG FORMATION ON THE NORTHERN MARGIN OF DABIE OROGENIC BELT |
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| LI Shuang-ying ,LI Ren-wei ,YUE Shu-cang ,WANG Dao-xuan ,LIU Yin ,MENG Qing-ren ,and JIN Fu-quan.GRAVEL FEATURES AND TECTONIC IMPLICATION IN THE CARBONIFEREOUS HUYOUFANG FORMATION ON THE NORTHERN MARGIN OF DABIE OROGENIC BELT[J].Journal of Stratigraphy,2003,27(2):116-121,T001. |
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| Authors: | LI Shuang-ying LI Ren-wei YUE Shu-cang WANG Dao-xuan LIU Yin MENG Qing-ren and JIN Fu-quan |
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| Institution: | LI Shuang-ying 1),LI Ren-wei 2),YUE Shu-cang 1),WANG Dao-xuan 1),LIU Yin 1),MENG Qing-ren 2),and JIN Fu-quan 1) |
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| Abstract: | A set of conglomerates developed in Upper Carboniferous Huyoufang Formation on the northern margin of Dabie Orogenic Belt, in which gravels composed mainly of quartz schist, mica-quartz schist, quartzite and phyllite called greenschist facies, and subordinately metaclastics and carbonate rocks. Based on Rb-Sr age date, they define isochorn ages of 565±30Ma and 307Ma. They reflect that the greenschist facies wend though two metamorphic events in Late Proterozoic and Late Palaeozoic respectively. The gravels may are from Yangzi Landmass not Fuziling Group or Xinyang Group. On basis of evidences from the gravels and fossils, it is suggested that there was a tectonic denudation block that composed mainly of Middle-Late Proterozoic metamorphic rocks and Lower Palaeozoic carbonate rocks from Yangtze Landmass in Dabieshan in Palaeozoic, not a paleo-inland arc. |
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| Keywords: | gravels of metamorphic rock Carboniferous Huyoufang Formation provenance Yangzi Landmass Dabie Mountain Anhui |
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