| 内蒙古拴马桩煤系海相动物化石的发现及其地质意义 |
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| 引用本文： | 张泓.内蒙古拴马桩煤系海相动物化石的发现及其地质意义[J].地质通报,1997(2). |
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| 作者姓名： | 张泓 |
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| 作者单位： | 煤炭科学研究总院西安分院地质研究所 |
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| 摘 要： | 石炭纪拴马桩煤系分布于内蒙古自治区色尔腾山及大青山一带，自下而上划分为下佘太组、上佘太组及拴马桩组。该煤系主要由陆源碎屑物质组成，总厚度大于１０００ｍ，长期以来认为它是陆相的山间盆地型沉积。近年来，作者在上、下佘太组中首次发现双壳类化石：Ｐｔｅｒｉｎｏｐｅｃｔｉｎｅｌａ，Ｓｃｈｉｚｏｄｕｓ，Ｓｅｄｇｗｉｃｋｉａ等共５属８种，为该煤系存在海相沉积提供了佐证。还从沉积学、地球化学、古生态学及古流向测量等方面，对其沉积相类型、石炭纪时期的古地理格局进行了分析与探讨
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| 关 键 词： | 拴马桩煤系 石炭纪 海相化石 蒙古海槽 内蒙古 |
DISCOVERY OF MARINE FOSSILS IN THE SHUANMAZHUANG COAL MEASURES IN INNER MONGOLIA AND THEIR SIGNIFICANCE |
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| Zhang Hong.DISCOVERY OF MARINE FOSSILS IN THE SHUANMAZHUANG COAL MEASURES IN INNER MONGOLIA AND THEIR SIGNIFICANCE[J].Geologcal Bulletin OF China,1997(2). |
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| Authors: | Zhang Hong |
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| Abstract: | The Carboniferous Shuanmazhuang coal measures are distributed in the Borteng and Daqing mountains, Inner Mongolia. They may be divided in ascending order into three units: the Lower Shetai, Upper Shetai and Shuanmazhuang Formations. The coal measures are composed dominantly of terrigenous clastic materials with a total thickness of more than 1000 m. They have long been considered as continental deposits of intermontane basin type. During recent geological investigations, the author has first found bivalve fossils in the Lower and Upper Shetai Formations. These fossils comprise five genera and eight species, such asScizodus sinensis, S.shansiensis, Pterinopectinella kalamailiensis, Wilkingia regularis, Sanguinolites shiqiantanensis and Sedgwickia attenuata. They have provided evidence of the existence of marine sediments in coal measures. On the basis of sedimentological, geochemical, paleo ecological and paleocurrent studies, this paper discusses the types of sedimentary facies of coal measures and their evolutionary trend and the paleogeographic framework of the study area during the Carboniferous. |
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| Keywords: | Shuanmazhuang coal measures Carboniferous marine fossil Mongolian Sea Trough Inner Mongolia |
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