首页|四川兴文县麒麟乡五峰组—龙马溪组黑色页岩的生物地层序列

四川兴文县麒麟乡五峰组—龙马溪组黑色页岩的生物地层序列

扫码查看
原文链接
  • NETL
  • NSTL
  • 万方数据
四川盆地是中国南方页岩气勘探与开发的主要区块.对四川兴文县麒麟乡的麒新桥剖面和某浅井剖面的五峰组—龙马溪组黑色页岩开展了详细的生物地层研究工作,在该区建立了从上奥陶统凯迪阶上部的Dicellograptus complexus带至志留系兰多维列统埃隆阶顶部的Stimulograptus sedgwickii带的12个连续生物带和组合,这一生物地层序列可实现区域和全球的精确对比.在麒新桥剖面的新鲜露头上,我们观察到了从观音桥层碳酸盐岩到龙马溪组黑色笔石页岩的岩相和生物相的连续过渡变化.这一连续序列指示了从赫南特壳相动物群至Metabo-logra ptus perscul ptus带笔石群、从富氧环境至缺氧环境的连续、快速转换;从全球范围来看,这一地层序列也对应于奥陶纪末冰期结束后冰川快速消融导致的全球海平面上升事件.
BIOSTRATIGRAPHY OF THE WUFENG-LUNGMACHI BLACK SHALES AT QILIN, XINGWEN COUNTY, SICHUAN PROVINCE
The Sichuan Basin is the most important area for the exploration and development of shale gas in South China.Recently we investigated two sections at Qilin,Xingwen County,Sichuan Province,the Qixinqiao section and the Qilin Well section.The biostratigraphic sequence of the Wufeng to Lungmachi black shales has been recognized,including eleven graptolite biozones and one shelly assemblage from the Dicellograptus compleaxus Zone of the Katian Stage (Upper Ordovician) to the Stimulograptus sedgwickii Zone of the Aeronian Stage (Llandovery,Silurian).The sequence can be correlated regionally and globally.From the unweathered outcrop at the Qixinqiao section,we found a continuous transition of litho-facies and bio-facies from the Kuanyinchiao Formation to the Lungmachi Formation,which represents the rapid change from the Hirnantia shelly fauna to the graptolite fauna of the Metabolograptus persculptus Zone,and the change from the well-oxygenated water to the anaerobic or dysaerobic water.This transition also represents the global sea-level rising resulted from the rapid glacial melting after the Hirnantian icehouse.

biostratigraphyblack shalesWufeng FormationLungmachi FormationOrdovicianSilurianQilinXingwen CountySichuan Province

樊隽轩、吴磊、陈中阳、陈清、张琳娜、Soo Kwong-Yin、Singh Navpreet、李学康、王媛

展开 >

现代古生物学和地层学国家重点实验室,中国科学院南京地质古生物研究所 江苏南京210008

中国科学院资源地层学与古地理学重点实验室 江苏南京 210008

壳牌中国勘探与生产有限公司 北京100004

中石油西南油气田分公司蜀南气矿 四川泸州 646001

展开 >

生物地层 黑色页岩 烃源岩 五峰组 龙马溪组 奥陶系 志留系 麒麟 兴文 四川

国家自然科学基金国家自然科学基金国家自然科学基金中国科学院知识创新工程重要方向项目

412210014127204241290260KZCX2-EW-111

2013

地层学杂志
全国地层委员会 中国科学院南京地质古生物研究所

地层学杂志

CSTPCDCSCD北大核心
影响因子：0.824
ISSN：0253-4959
年,卷(期)：2013.37(4)
  • 17
  • 6