安徽新杭地区南陵湖组微相分析及其大理石找矿方向  

MICROFACIES ANALYSIS AND EXPLORATION GUIDES OF MARBLE DEPOSIT OF THE NANLINGHU FORMATTONIN XINHANG DISTRICT, ANHUI PROVINCE

作　　者：王金云[1] 

机构地区：[1]安徽省地矿局322地质队

出　　处：《现代地质》1993年第1期9-19,T002,共12页Geoscience

摘　　要：新杭地区下三叠统南陵湖组碳酸盐岩微相可划分为13个类型。且归属于盆地边缘、台地斜坡、粒屑滩、泻湖及潮坪8个大的沉积环境。并可建立一个垂向上的浅水向上依次相接的微相序列,进而转换成水平方向的沉积模式,表现为明显的海退序列。微相序列的演变与沉积盆地演化有密切的关系,某些微相的岩石可作为大理石矿床开采。<ABSTRACT> Carbonate microfacies of the Nanlinghu Formation of the Lower Triassic can be divid ed into thirteen types. These microfacies belong to five kinds of different sedimentary en vironment. i.e. the basin margin (microfacies 1, 2. 3). the platform slope (microfacies 4, 5. 6). the allochem beach (microfacies 7). the barachois (microfacies 8, 9. 10) and the tidal flat (microfacies 11, 12, 13). A. horizontal depositional model has been established. At the vertical section, thirteen microfacies types can be established a continuous microfa cies sequence of shallow- water to make piogiess and an obvious regressive sequence is formed. At the horizontal section, thirteen microfacies types can be made up a horizontal facies change sequence from the shallow-water basin margin to the platform slope?the platform allochem beach-the platform barachois-the platform tidal flat. The evolution of microfacies sequence and the change of depositional basin is of close relation. Some rocks of the microfacies 6,7,8,9,11 can be quarried as marble ore. The promising places of searching for the marble deposits are along north marginal district of the Jiangnan old land mass, from Dongzhi, past Jingxian and Guangde of Anhui Province, and on to Yix-ing. Wuxi of Jiangsu Province.

关 键 词：灰岩 微相 沉积盆地 大理石矿床 

分 类 号：P619.223[天文地球—矿床学]