内蒙古扎赉特旗中二叠统岩石地层、生物地层特征及沉积环境分析THE MIDDLE PERMIAN LITHOSTRATIGRAPHY,BIOSTRATIGRAPHY AND SEDIMENTARY ENVIRONMENTS OF THE JLAID QI,INNER MONGOLIA
王俊涛,张永生,宋天锐,牛绍武,曹洁,田树刚
摘要(Abstract):
对扎赉特旗地区塔本毛都和查干楚鲁一带出露的四甲山组、柳条沟组进行了实测和系统采样。根据生物化石组合的特征将其划分为3个生物组合带,即Monodiexodina-Parafusulina,Codonofusiella-Pseudodoliolina组合带,Waagenophyllum-Wentzelella珊瑚组合带。它们产于中二叠统祥播阶至冷坞阶的地层。结合岩性特征及层位对比,塔本毛都剖面的1~6层、7~15层与查干楚鲁剖面1~11层及12~20层分别划归为四甲山组与柳条沟组。沉积相分析表明,剖面可识别出4种沉积相和5种沉积微相。沉积环境为稳定的碳酸盐台地环境,不同沉积相组成一个完整的碳酸盐台地的发育旋回。
关键词(KeyWords): 生物地层;生物组合带;碳酸盐岩微相;沉积环境;中二叠统;扎赉特旗;内蒙古
基金项目(Foundation): 中国地质调查局资源评价项目(编码:1212010782004)资助
作者(Author): 王俊涛,张永生,宋天锐,牛绍武,曹洁,田树刚
DOI: 10.19839/j.cnki.dcxzz.2011.04.005
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