• 论文
主办单位:煤炭科学研究总院有限公司、中国煤炭学会学术期刊工作委员会
川南龙马溪组笔石类生物与页岩气成因相关性研究
  • Title

    Study on relationship between graptolite and shale gas origin of Longmaxi Formation in southern Sichuan

  • 作者

    马施民邹晓艳朱炎铭李贤庆赵佩

  • Author

    MA Shi-min ZOU Xiao-yan ZHU Yan-ming LI Xian-qing ZHAO Pei

  • 单位

    中国矿业大学(北京)地球科学与测绘工程学院中国矿业大学资源与地球科学学院

  • Organization
    College of Geoscience and Surveying Engineering,China University of Mining and Technology( Beiing) School of
    Resource and Earth Science,China University of Mining and Technology
  • 摘要
    为探讨下古生界页岩笔石类生物与页岩气生烃母质的相关性,采用埋藏学与微区结构分析相结合的手段,对川南地区龙马溪组笔石化石的宏观保存特征、微区结构及围岩组分进行了综合分析。结果表明:笔石作为宏观上唯一可识别的大化石类型,其保存方式多为无序的叠加式或聚集式,化石多样性不高且单层丰度变化较大,疑为主要的页岩气烃源母质。笔石硬体扫描电镜和背散射电镜观察显示,碳元素是其硬体的唯一残留组分,尤其是轴部或管胞部;化石的围岩基本上由黏土矿物组成,未见生物体构成元素的显示;页岩样品有机质丰度恢复结果,与油浸光下笔石体丰度基本相当,间接说明了研究区龙马溪组页岩气生成与笔石化石可能存在有某种成因上的联系。
  • Abstract
    For an in- depth understanding on biogenetic mechanism of shale gas and the relevance between graptolite creatures and hydrocarbon derived from shale, a combination of taphonomy and micro- fabric analysis was used for graptolite fossils contained in Longmaxi Formation in southern Sichuan from view of fossils conservati ve characteristics ,micro- structure, components as well as surrounding rock.Graptolites as only presented macro fossil type,its taphonomic behaviors were marked by a diso rdered superimposition or centralized accumulation. Fossil diversity was not high in single layer with varied abundance. It could be considered as parent material for gas hy drocarbon source, because the observation and analysis of hard part of graptolites by SEM and EBSD showed that C was the unique element in residues component of har dware of graptolites,especially in axis and the walls of thecae. In contrast,the surrounding rock were composed mainly by clay minerals,and there were rarely organic const itute elements. The recovery results of shale sampleDs organic matter abundance was nearly the same as oil immersion. Therefore,it must be some relationships between graptolites and the formation of shale gas in study area.
  • 关键词

    川南地区龙马溪组笔石页岩气成因

  • KeyWords

    Southern Sichuan; Longmaxi Formation; graptolite; shale gas formation;

  • 基金项目(Foundation)
    国家重点基础研究发展计划(973计划)资助项目(2012CB214702);中央高校基本科研业务费专项基金资助项目(2013YD02);
相关问题

主办单位:煤炭科学研究总院有限公司 中国煤炭学会学术期刊工作委员会

©版权所有2015 煤炭科学研究总院有限公司 地址:北京市朝阳区和平里青年沟东路煤炭大厦 邮编:100013
京ICP备05086979号-16  技术支持:云智互联