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四川旺苍志留系鲕粒灰岩特征及地质意义
引用本文:秦松,张涛,苏文博,王巍,马超.四川旺苍志留系鲕粒灰岩特征及地质意义[J].地球科学,2011,36(1):43-52.
作者姓名:秦松  张涛  苏文博  王巍  马超
作者单位:中国地质大学地球科学与资源学院;四川省地勘局区调队;
基金项目:中石化海相烃源岩前瞻性项目(No.G0800-06-ZS-319); 国家自然科学基金项目(No.40772076); 斯伦贝谢——中国地质大学(北京)教育基金(No.SLBX0901)
摘    要:近期在川西北旺苍地区早志留世南江组中首次发现了鲕粒灰岩.它们多以10cm左右的薄层夹持在页岩或粉砂质泥岩中,沉积相分析显示该段地层总体应属于均斜缓坡沉积体系.说明这些鲕粒是由异地搬运而来,在旺苍附近可能会存住相当规模的鲕粒滩.在显微镜下可观察到,其中的鲕粒类别单一,鲕粒紧密排列.并呈现一定程度的压缩变形,局部壳层呈锯齿...

关 键 词:鲡粒灰岩  古气候  志留纪  沉积作用  上扬子地台

Characteristics and Implications of the Oolitic Limestones from the Silurian Succession in Wangcang,Sichuan,South China
QIN Song,ZHANG Tao,SU Wen-bo,WANG Wei,MA Chao.Characteristics and Implications of the Oolitic Limestones from the Silurian Succession in Wangcang,Sichuan,South China[J].Earth Science-Journal of China University of Geosciences,2011,36(1):43-52.
Authors:QIN Song  ZHANG Tao  SU Wen-bo  WANG Wei  MA Chao
Institution:QIN Song1,ZHANG Tao2,SU Wen-bo1,WANG Wei1,MA Chao1 1.School of the Earth Sciences and Resources,China University of Geosciences,Beijing 100083,China 2.Regional Investigation Team in Geological Prospecting Bureau of Sichuan,Shuangliu 610213,China
Abstract:Oolitic limestone has been recognized for the first time in the Early Silurian (Telychian) Nanjiang Formation from Wangcang,NW Sichuan. Facies analyses show that this oolitic-bearing succession developed in a ramp environment. With the thickness less than 10 cm in general and interbedded in the ramp succession,it can be determined that the oolitic layers were moved by episodic currents probably from a large oolitic beach near Wangcang,NW Sichuan,Upper Yangtze platform. Under the microscope,the categories of...
Keywords:oolitic limestone  paleoclimate  Silurian  sedimentation  Upper Yangtze platform    
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