川西北马角坝地区石炭纪碳酸盐岩微相及沉积环境分析THE CARBONIFEROUS CARBONATITES MICROFACIES AND ENVIRONMENT ANALYSIS IN MAJIAOBA AREA,NORTHWESTERN SICHUAN
徐锦龙,洪天求,贾志海,王伟,罗雷
摘要(Abstract)：
四川江油马角坝地区石炭系发育良好,化石丰富,是研究四川盆地石炭系的经典地区之一。采用微相分析的方法,根据江油马角坝地区双龙剖面碳酸盐岩的生物组合、颗粒成分、基质类型及其结构等特征,将该地区石炭系划分出11种微相类型。根据微相类型及其组合特征将本区的沉积相划分为4个沉积相带,分别为台地边缘簸选砂滩相/FZ6、开阔台地相/FZ7、局限台地相/FZ8和蒸发台地相/FZ9。根据沉积相带的组合特征可以判断:该地区早石炭世经历了海进—海退—海进旋回,晚石炭世经历了4期短暂波动的海进—海退旋回和两期相对完整的海进—海退旋回。
关键词(KeyWords)： 微相;沉积相;碳酸盐岩;石炭系;马角坝地区;江油;四川
基金项目(Foundation): 国家973项目《川东地区晚二叠世隐伏生物礁的识别及其对油气储集的控制研究》(No.2010CB434809)资助
作者(Author): 徐锦龙,洪天求,贾志海,王伟,罗雷
DOI: 10.19839/j.cnki.dcxzz.2011.04.006
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