| 四川盆地东北缘灯影组核形石特征及环境意义 |
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| 引用本文： | 唐玄,刘树根,宋金民,李智武,余永强,龙翼,昝博文,赵聪.四川盆地东北缘灯影组核形石特征及环境意义[J].沉积学报,2018,36(2):232-242. |
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| 作者姓名： | 唐玄 刘树根 宋金民 李智武 余永强 龙翼 昝博文 赵聪 |
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| 作者单位： | 油气藏地质及开发工程国家重点实验室(成都理工大学), 成都 610059 |
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| 基金项目： | 国家科技重大专项，中石化前导性项目，National Science and Technology Major Project |
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| 摘 要： | 四川盆地紫阳麻柳地区震旦系灯影组中见有核形石发育。通过野外剖面实测、偏光显微镜和场发射扫描电镜等手段，对核形石的形态、结构、形成环境及其主控因素进行研究，结果表明:麻柳灯影组核形石主要集中在灯四段中上部，其可分为四类:Ⅰ类正常核形石，Ⅱ类正常复合核形石，Ⅲ类薄皮核形石，Ⅳ类薄皮复合核形石，且以Ⅰ类为主。核形石形态以球形为主，可见少量椭球形、棒形以及不规则形态。紫阳麻柳地区灯影组核形石的形成受灯影组充足的物质基础、适宜的中-高能水动力条件以及低陆源碎屑物质的注入等因素共同控制。通过研究该区核形石沉积环境可知，灯影组四段的沉积环境为中-高能浅缓坡沉积相带。
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| 关 键 词： | 震旦系 核形石 形态结构特征 主控因素 沉积环境 |
| 收稿时间： | 2017-09-18 |
Characteristics and Environmental Significance of the Sinian Dengying For-mation Oncoids in the Northeastern Sichuan Basin |
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| TANG Xuan,LIU ShuGen,SONG JinMin,LI ZhiWu,YU YongQiang,LONG Yi,ZAN BoWen,ZHAO Cong.Characteristics and Environmental Significance of the Sinian Dengying For-mation Oncoids in the Northeastern Sichuan Basin[J].Acta Sedimentologica Sinica,2018,36(2):232-242. |
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| Authors: | TANG Xuan LIU ShuGen SONG JinMin LI ZhiWu YU YongQiang LONG Yi ZAN BoWen ZHAO Cong |
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| Institution: | State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Chengdu University of Technology, Chengdu 610059, China |
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| Abstract: | Oncoids occur in Sinian Dengying Formation in Ziyang Maliu region of Sichuan Basin.Using the field geo-logical survey,the polarizing microscope and field emission scanning electron microscopy(SEM)to study oncoids of morphology,structure,sedimentary environment and the main control factors,the result is as follows:oncoids are de-veloped in the middle and upper of the four section of the Dengying Formation,they can be divided into four catego-ries:TypeⅠnormal oncoid, Type Ⅱnormal compound oncoid, Type Ⅲ thin skin oncoid, Type Ⅳ thin skin com-pound oncoid,and given priority to with TypeⅠ.Oncoids of morphology are given priority to with spherical,and few ellipsoid,bar and irregular shape of oncoids.The conditions of the forming of oncoids are sufficient material basis in Sinian Dengying Formation,appropriate middle-high energy hydrodynamic conditions and the injection of low terrige -nous clastic material.Research shows that the sedimentary environment of the oncoids in the middle and upper of the four section of the Dengying Formation is in a medium-high energy shallow gentle slope belt. |
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