| 中扬子地区晚震旦世-早寒武世沉积特征及岩相古地理 |
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| 引用本文： | 李忠雄,陆永潮,王剑,段太忠,高永华.中扬子地区晚震旦世-早寒武世沉积特征及岩相古地理[J].古地理学报,2004,6(2):151-162. |
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| 作者姓名： | 李忠雄 陆永潮 王剑 段太忠 高永华 |
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| 作者单位： | 1.中国地质大学资源学院 武汉 430074;2.成都地质矿产研究所 成都 610082;3.Marathon Oil Company,Houston,TX 77056-2725;4.中国地质科学院 北京 100037 |
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| 基金项目： | 国家自然科学基金面上及重点项目(40072038、49972046、40032010-B)联合资助. |
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| 摘 要： | 中扬子地区指青峰-湘广断裂带以南，湘黔桂海盆以北，鄂西恩施-龙山一线以东的湖北省和湖南省的大部分地区。根据中扬子地区上震旦统-下寒武统十余条代表性剖面的沉积特征及其横向展布规律，应用等时面优势相成图方法编制了晚震旦世的陡山沱期、灯影期,早寒武世的筇竹寺期、沧浪铺早期、沧浪铺晚期、龙王庙期共6幅岩相古地理图。中扬子地区上震旦统发育了从碳酸盐潮坪、开阔台地、浅滩、台地边缘、斜坡到台地前缘盆地等沉积，下寒武统下部主要为细碎屑岩和碳酸盐岩组成的混合型浅海陆棚沉积，上部变成碳酸盐潮坪、开阔台地、台缘斜坡和台缘盆地沉积。晚震旦世岩相古地理格局由碳酸盐台地(鄂中台地)和南边的台缘盆地组成。由于地壳差异性升降运动，晚震旦世陡山沱期岩相古地理格局发生了急剧变化。早寒武世早-中期岩相古地理格局由鄂中古陆、围绕古陆的碳酸盐潮坪、陆棚及南边的陆棚边缘盆地组成。早寒武世中-晚期岩相古地理格局由碳酸盐潮坪、开阔台地、台缘斜坡和台缘盆地组成，该地区主体进入碳酸盐台地演化阶段。
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| 关 键 词： | 中扬子地区 晚震旦世 早寒武世 沉积特征 岩相古地理 |
| 文章编号： | 1671-1505(2004)02-0151-12 |
| 修稿时间： | 2003年6月24日 |
Sedimentary characteristics and lithofacies palaeogeography of the Late Sinian and Early Cambrian in middle Yangtze region |
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| Li Zhongxiong , Lu Yongchao Wang Jian Duan Taizhong Gao Yonghua Faculty of Earth Resources,China University of Geosciences,Wuhan ,Hubei Chengdu Institute of Geology and Mineral Resources,Chengdu ,Sichuan Marathon Oil Company,Houston,TX - Chinese Academy of Geological Sciences,Beijing.Sedimentary characteristics and lithofacies palaeogeography of the Late Sinian and Early Cambrian in middle Yangtze region[J].Journal of Palaeogeography,2004,6(2):151-162. |
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| Authors: | Li Zhongxiong Lu Yongchao Wang Jian Duan Taizhong Gao Yonghua Faculty of Earth Resources China University of Geosciences Wuhan Hubei Chengdu Institute of Geology and Mineral Resources Chengdu Sichuan Marathon Oil Company Houston TX - Chinese Academy of Geological Sciences Beijing |
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| Institution: | 1 Faculty of Earth Resources,China University of Geosciences,Wuhan 430074，Hubei;
2 Chengdu Institute of Geology and Mineral Resources, Chengdu 610082,Sichuan;
3 Marathon Oil Company,Houston,TX 77056-2725;
4 Chinese Academy of Geological Sciences,Beijing 100037 |
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| Abstract: | The middle Yangtze region in this paper refers to the most part of Hubei and Hunan Provinces bounded on the north by the Qingfeng Xiangguang Fracture, on the west by western border of Hubei Province, and on the south by Hunan Guizhou Guangxi deep sea basin Based on field investigation, the sedimentary characteristics, horizontal correlation and facies distribution of Upper Sinian and Lower Cambrian for more than ten sections in the middle Yangtze region are comprehensively studied in this paper Six lithofacies palaeogeographic maps of Doushantuo, Dengying, Qiongzhusi, Canglangpu, and Longwangmiao Ages of Late Sinian and Early Cambrian have been made in the light of dominant facies and in the way to make stratigraphic map On the basis of lithofacies palaeogeographic map, the sedimentary and lithofacies palaeogeographic characteristics of the middle Yangtze region during the Late Sinian and Early Cambrian are also described There are four principal palaeogeographic units in the Late Sinian in the middle Yangtze region, i e carbonate tidal flat, open carbonate platform,platform margin slopes and a basin in the south The major lithofacies palaeogeographic characteristics of the Qiongzhusi Age and early Canglangpu Age (Early Cambrian) are a land in middle Hubei, the carbonate tidal flat surrounding the land , shelf and a basin in the south The land disappeared during the Late Canglangpu Age and Longwangmiao Age (Early Cambrian) and the framework of palaeogeography consisted of tidal flat,open carbonate platform , platform margin slopes and basin in the south |
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| Keywords: | Late Sinian Early Cambrian sedimentary characteristics lithofacies palaeogeography middle Yangtze region |
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