老挝万象地区的侏罗系THE JURASSIC SYSTEM IN THE VIENTIANE AREA OF LAOS
朱延浙,吴军,徐世光,严城民
摘要(Abstract)：
为了解老挝万象含盐盆地的形成与演化历史,在老挝万象平原钾镁盐矿勘查项目中,对该地区进行了区域地质调查。老挝万象地区的侏罗系为一套夹少量碳酸盐岩的红色陆源碎屑沉积,由上到下可划分为班辛黑组、南舍组、南立组;该地层的介形类分属Gomphocythere-Darwinula组合、Darwinula sarytirmenensi-Darwinula magnca组合,叶肢介属滇南古渔乡叶肢介动物群,腹足类具中侏罗世陆生动物群特征;本区侏罗系为一套以湖泊沉积为主的河湖相沉积,构成一个完整的Ⅲ级层序,可划分出低水位体系域、湖侵体系域、凝缩期沉积及高水位体系域。这3个组的岩石地层、生物地层及年代地层特征,可与我国滇西地区的漾江组、花开左组相对比。
关键词(KeyWords)： 岩石地层;生物地层;年代地层;层序地层;侏罗系;万象地区;老挝
基金项目(Foundation): 国家发展计划委员会“老挝万象平原钾镁盐矿勘查”(计外资[1999]2298号)成果
作者(Author): 朱延浙,吴军,徐世光,严城民
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