| 鄂西志留系罗惹坪组底部碳酸盐岩沉积环境分析 |
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| 引用本文： | 李旭兵,王令占,王传尚,赵小明.鄂西志留系罗惹坪组底部碳酸盐岩沉积环境分析[J].地层学杂志,2008,32(3). |
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| 作者姓名： | 李旭兵 王令占 王传尚 赵小明 |
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| 作者单位： | 宜昌地质矿产研究所,湖北,宜昌,443003 |
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| 基金项目： | 中国地质调查局湖北1/5万《火烧坪》等四幅区调，"中上扬子海相含油气盆地分析与油气成藏条件综合调查评价(121010733505)"成果之一 |
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| 摘 要： | 通过对鄂西地区志留纪罗惹坪组调查,发现在宜昌分乡一带,罗惹坪组底部碳酸盐岩主要为一套生物礁灰岩,产大量的单体或群体珊瑚化石;长阳杉沱湾,长阳乐园以及宜都梯子口一带主要为泥灰岩、生物碎屑灰岩以及瘤状灰岩组成;而在西侧的建始细砂—羊死岩一带碳酸盐岩消失,主要沉积碎屑岩,为灰色薄层细砂岩夹粉砂质页岩,发育水平层理以及沙纹层理。通过沉积环境分析,认为宜昌分乡一带为礁滩相沉积环境,长阳杉沱湾—长阳乐园一带以及宜都梯子口一带为礁前相沉积环境,建始细砂—羊死岩一带为浅海碎屑岩相沉积环境。
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| 关 键 词： | 沉积环境 礁滩相 浅海碎屑岩相 罗惹坪组 志留系 鄂西 |
CARBONATE SEDIMENTARY ENVIRONMENT OF THE BASAL LOJOPING FORMATION(SILURIAN),WESTERN HUBEI PROVINCE |
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| LI Xu-bing,WANG Ling-zhan,WANG Chuan-shang,ZHAO Xiao-ming.CARBONATE SEDIMENTARY ENVIRONMENT OF THE BASAL LOJOPING FORMATION(SILURIAN),WESTERN HUBEI PROVINCE[J].Journal of Stratigraphy,2008,32(3). |
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| Authors: | LI Xu-bing WANG Ling-zhan WANG Chuan-shang ZHAO Xiao-ming |
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| Abstract: | Our study shows that the Silurian Luoreping Fmormation in western Hubei consists of reefer limestone in Fenxiang of Yichang City,with abundant solitary and colonial coral fossils.In contrast,Lojoping carbonates in Santuowan of Changyang County,in Leyuan of Changyang County,and in Tizikou of Yidu County consist mainly of marl limestone,bioclastic limestone and limestone.The carbonate facies disappears in Xisha-Yansiyan of Jianshi County,where the Lojoping Formation is characterized by gray thin-bedded sandstone and sandy shale.Through analyzing the sedimentary environments in western Hubei,we consider that the Lojoping Formation is reefal sand facies in Fenxiang of Yichang City,reef front facies in Leyuan of Changyang County-Santuowan of Changyang County-Tizikou of Yidu County,and shallow-water environment in Xisha-Yansiyan area of Jianshi County. |
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| Keywords: | sedimentary environment reef sand facies shallow-water Lojoping Formation Silurian west Hubei |
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