“皮壳—葡萄状”白云岩是一种非常特殊结构的白云岩。文中报道了塔里木盆地西北缘东二沟及塔北星火101井上震旦统奇格布拉克组中皮壳—葡萄状白云岩特征,并对其成因进行了探讨。皮壳状—葡萄状白云石中发育明、暗纤状白云石或纹层条带的含少量细晶的纤状—细粒状白云石以及肾状和葡萄状粉细晶白云石;由球形、杆形、孢子形等蓝细菌构成泡沫状结构;明暗、环带状橙红色光或中等橙红色光、核部发光较暗或不发光;与基质白云石相比,葡萄—皮壳状白云石The botryoidal dolostone of a unusual textures features in Qigebulake Formation,in the Upper Sinian developed at Dong'ergou section and Well XH 101 of northern Tarim Basin,has been firstly reported. Constraining its origin based on lithology and geochemical data,the shell-comb or botryoidal dolostone,which consists of shrub fibrous cement,bladed radial as well as granular dolomite crystal with alternately dark and luminescent and zonation,the average of botryoidal dolostone of
