| 西沙群岛西科1井珊瑚组合面貌及其生态环境 |
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| 引用本文： | 刘新宇,祝幼华,廖卫华,罗威,马兆亮,徐守立,马瑞芳.西沙群岛西科1井珊瑚组合面貌及其生态环境[J].地球科学,2015,40(4):688-696. |
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| 作者姓名： | 刘新宇 祝幼华 廖卫华 罗威 马兆亮 徐守立 马瑞芳 |
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| 作者单位： | 1.中海石油(中国)有限公司湛江分公司, 广东湛江 524057 |
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| 基金项目： | 中国海洋石油总公司项目(No.CNOOC-2013-ZJ-01);国家自然科学基金(No.41272014);国家重大项目(No.2011ZX05025-002) |
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| 摘 要： | 西科1井0~748 m井段岩心中珊瑚化石欠丰富, 属种比较单调, 共鉴定6科16属及1个未定属.在井深216 m以上的地层中发现第四纪特有的Endopsammia(内脊沙珊瑚)和Heliopora(苍珊瑚)等, 表明含上述特征性珊瑚化石的地层应划归第四系.在216 m以下井段的岩心中Endopsammia和Heliopora已全部绝迹, 应划归比第四纪更老的地层.地层时代从老到新, 生态环境发生了明显的变化, 生物的抗风浪能力逐渐加强.中新统可能属于泻湖相, 尔后又逐渐转变为内礁坪相, 到上新统演变为内、外礁坪相相互交替, 第四系则可能属于外礁坪相.
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| 关 键 词： | 珊瑚组合 生态环境 西科1井 西沙群岛 海洋地质 |
| 收稿时间： | 2014-06-13 |
Coral Assemblages and Their Ecological Environment of Well Xike-1, Xisha Islands |
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| Liu Xinyu;Zhu Youhua;Liao Weihua;Luo Wei;Ma Zhaoliang;Xu Shouli;Ma Ruifang.Coral Assemblages and Their Ecological Environment of Well Xike-1, Xisha Islands[J].Earth Science-Journal of China University of Geosciences,2015,40(4):688-696. |
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| Authors: | Liu Xinyu;Zhu Youhua;Liao Weihua;Luo Wei;Ma Zhaoliang;Xu Shouli;Ma Ruifang |
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| Affiliation: | Liu Xinyu;Zhu Youhua;Liao Weihua;Luo Wei;Ma Zhaoliang;Xu Shouli;Ma Ruifang;Zhanjiang Branch of CNOOC Ltd.;Key Laboratory of Economic Stratigraphy and Palaeogeography,Chinese Academy of Sciences,(Nanjing Institute of Geology and Palaeontology);Nanjing Institute of Geology and Palaeontology,Chinese Academy of Sciences;College of Earth Science,University of Chinese Academy of Sciences; |
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| Abstract: | The coral in 0-748 m of the well Xike-1 is less abundant and simple, 6 families including 16 genera and 1 undefined genus are identified. Some Quaternary genera such as Endopsammia and Heliopora are only found in the strata above 216 m depth and disappear below, which indicate that the strata above 216 m depth is Quaternary and the strata below is older. In term of time, the palaeosedimentary environment has been apparent changing and the ability of wave or wind resistance of the biology has been strengthening. It is lagoonal environment in Miocene, and then gradually changes to the inner reef flat facies. In Pliocene, the inner and outer reef flat environments alternately occur. Until the Quaternary, the palaeosedimentary environment may be outer reef flat facies. |
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