| 鄂西地区二叠系大隆组与吴家坪组的两种接触关系 |
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| 引用本文： | 牛志军,李志宏,段其发,傅泰安.鄂西地区二叠系大隆组与吴家坪组的两种接触关系[J].地球学报,2001,22(3):249-252. |
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| 作者姓名： | 牛志军 李志宏 段其发 傅泰安 |
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| 作者单位： | 宜昌地质矿产研究所;宜昌地质矿产研究所;宜昌地质矿产研究所;宜昌地质矿产研究所 |
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| 基金项目： | 原地质矿产部地质调查局“1∶5万长梁子幅(H49E008008)、龙潭坪幅(H49E008009)区域地质调查”项目 |
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| 摘 要： | 鄂西地区大隆组与吴家坪组之间存在2种不同的接触关系；（1）整合接触，仅分布于建始、恩施等地；（2）假整合接触，广见于鄂西地区，接触界面形成于晚二叠世吴家坪中晚期，2种接触界面的确定是划分碳酸盐台地上Ⅱ型层序界面的重要标志，同时是否定大隆组深水盆地成因论的有力证据。
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| 关 键 词： | 大隆组 吴家坪组 接触关系 湖北 |
Two Types of Contact Relationship between Permian Dalong Formation and Wujiaping Formation in Western Hubei |
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| NIU Zhi-jun,LI Zhi-hong,DUAN Qi-fa and FU Tai-an.Two Types of Contact Relationship between Permian Dalong Formation and Wujiaping Formation in Western Hubei[J].Acta Geoscientia Sinica,2001,22(3):249-252. |
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| Authors: | NIU Zhi-jun LI Zhi-hong DUAN Qi-fa and FU Tai-an |
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| Institution: | Yichang Institute of Geology and Mineral Resources;Yichang Institute of Geology and Mineral Resources;Yichang Institute of Geology and Mineral Resources;Yichang Institute of Geology and Mineral Resources |
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| Abstract: | Two distinct types of contact relationship between Late Permian Dalong Formation and its underlying Wujiaping Formation were recognized during 1:50 000 geological mapping in western Hubei. One is conformable contact, which occurs only in Jianshi and Enshi, whereas the other is disconformable contact, which is common in this area. The contact boudary was formed in middle-late Wujiapinggian stage. The determination of the boundary constitutes a typical II-type sequence boundary of the carbonate plateform, and serves as powerful evidence to refute the deep-water origin of Dalong Formation. |
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| Keywords: | Dalong formation Wujiaping Formation contact relationship Hubei |
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