| 高压—超高压岩石对合肥盆地侏罗系沉积的贡献 |
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| 引用本文： | 李任伟,金福全,等.高压—超高压岩石对合肥盆地侏罗系沉积的贡献[J].岩石学报,2002,18(4):526-530. |
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| 作者姓名： | 李任伟 金福全 |
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| 作者单位： | 1. 中国科学院地质与地球物理研究所,北京,100029
2. 合肥工业大学资源与环境科学系,合肥,230009 |
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| 基金项目： | 国家重点基础研究发展规划 ( G1 9990 7550 7)，中科院重大基础研究项目 ( K951 - A1 - 40 1 - 0 7)资助 |
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| 摘 要： | 合肥盆地侏罗系沉积包括防虎山组、三尖铺组、周公山组和凤凰台组。上述地层中砂岩普遍产出碎屑白云母，而且几乎都为多硅白云母，Si原子数多从3．3至3．6（p.f.u），表明大别造山带高压－超高压变质岩石是合肥盆地沉积的重要物源。由於防虎山组地层沉积於早侏罗世，该地层中碎屑多硅白云母的新发现表明大别造山带高压－超高压岩石在早侏罗世时期已经出露地表。
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| 关 键 词： | 多硅白云母 高压－超高压岩石 物源 侏罗系 合肥盆地 变质岩 |
| 文章编号： | 1000-0569/2002/018(04)-0526-30 |
| 修稿时间： | 2001年4月22日 |
Contribution of high-pres sure and ultrahigh-pressure rocks to the Jurassic sedimentation in Hefei basin |
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| LI RenWei,SUN Shu,LI Zhong,JIANG MaoSheng,JIN FuQuan and LI ShuangYing . lnstitute of Geology and Geophysics,Chinese Academy of Sciences,Beijing,China.Contribution of high-pres sure and ultrahigh-pressure rocks to the Jurassic sedimentation in Hefei basin[J].Acta Petrologica Sinica,2002,18(4):526-530. |
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| Authors: | LI RenWei SUN Shu LI Zhong JIANG MaoSheng JIN FuQuan and LI ShuangYing lnstitute of Geology and Geophysics Chinese Academy of Sciences Beijing China |
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| Institution: | LI RenWei,SUN Shu,LI Zhong,JIANG MaoSheng,JIN FuQuan and LI ShuangYing . lnstitute of Geology and Geophysics,Chinese Academy of Sciences,Beijing,China . Department of Resource and Environment Sciences,Hefei Industrial University,Hefei,China |
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| Abstract: | The Jurassic sedimentary strata of Hefei Basin include the formations of Fanghus han, Sanjianpu, Zhougongshan and Fenghuangtai. Detrital white mica ubiquitously occurs in sandstones of these formations. The white mica is almost phengitic and the majority of the phengites has high Si content from 3.3 to 3.6(p.f.u.), whic h indicates that the high-pressure and ultrahigh-pressure rocks were an import ant s ource for the Jurassic sediments of Hefei Basin. The Fanghushan Formation d eposited during the early Jurassic. Therefore, the new discovery of detrital phe ngites in the Fanghushan Formation indicates that the high-pressure and ultrahi gh-pressure rocks of the Dabie orogenic belt were already exposed to the surfac e in the early Jurassic time. |
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| Keywords: | Phengite High pressure and ultrahigh pressure rocks Source rock Jurassic Hef ei basin |
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