| 山西地区太原组腕足动物古生态及其环境特征 |
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| 引用本文： | 高金汉.山西地区太原组腕足动物古生态及其环境特征[J].现代地质,1988(2). |
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| 作者姓名： | 高金汉 |
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| 摘 要： | 长期以来,前人对山西地区太原组腕足动物的研究侧重于描述性工作,而对于古生态特征及其环境背景的研究则重视不够。本文主要分析了该区太原组腕足动物的产状规律、纵横向上分布的变化及其古生态特征,在此基础上,结合岩性特征、沉积构造及部分微量元素的分析等,将太原组划分为5种主要的沉积相。笔者主要讨论了处于封闭、半封闭状态下水体安静,浑浊度高,具有一定淡化作用,以大量发育舌形贝类为特征的近岸浅水海湾或分流间湾泥岩相;位于潮间或潮下带,以富含腕足动物化石为特征的正常浅海碳酸岩相;以及动物化石稀少,但虫管潜穴丰富,以粉细砂岩与泥岩互层的潮坪相。根据上述特征及与邻区的对比,推测本区太原组是在一个巨大的海湾背景条件下形成的一套海陆交互相沉积。
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| 关 键 词： | 山西省 太原组 腕足动物 古生态特征 沉积相 |
THE PALSOECOLOGICAl FEATURES AND ENVIRONMENTAL BACKGROUND OF BRACHIOPOD FROM THE TAIYUAN FORMATION IN SHANXI PROVINCE |
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| Gao Jinhan.THE PALSOECOLOGICAl FEATURES AND ENVIRONMENTAL BACKGROUND OF BRACHIOPOD FROM THE TAIYUAN FORMATION IN SHANXI PROVINCE[J].Geoscience——Journal of Graduate School,China University of Geosciences,1988(2). |
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| Authors: | Gao Jinhan |
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| Institution: | China university of Geosciences |
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| Abstract: | The Taiyuan Formation is well developed in Shanxi province. A great number of Brachiopod fossils were collected from it. The Brachiopods mainly occur in the marine niudstones and limestones. Most of the fossils are Productida and Spiriferida, and the others are Strophomenida, Orthida, Rh-ynchonellida and Terebratullida. The analysis of paleoecological features suggests that the Taiyuan Formation mainly include five facies, and three of them are discussed as follows. The estuary facies,which is made of low energy brackish mudstone, is featured by bivalves, Gastropods and Lingulids> the shallowea facies including limestone is full of Brachiopods, the tidal flat facies, which is characterized by alternating sandstone and mudstone, is rich in trace fossils. All the features mentioned above show that the Taiyuan Formation was deposited in a huge bay environment. |
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| Keywords: | : Shanxi province Taiyuan Formation Brachiopod paleoeco-logical features sedimentary facies |
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