东濮凹陷古近系沙一段岩盐物理特征、分布规律及资源评价  

Physical Feature,Resource Distribution and Assessment of the Rocky Salt of First Member of Shahejie Formation,Paleogene in Dongpu Depression

作　　者：董芯岑[1] 张方亮[1] 戚宇[2] 鲍园[2] 

机构地区：[1]河南省地质矿产勘查开发局第一地质环境调查院,郑州450000 [2]中国科学院大学地球科学学院,北京100049

出　　处：《科技通报》2017年第6期53-57,共5页Bulletin of Science and Technology

基　　金：河南省2012年度省地质勘查基金项目(2012-140-3);中国博士后科学基金面上项目(2014M550809)

摘　　要：通过区域调查、野外岩心观测及室内实验测试等方法,对东濮凹陷古近系沙河街组沙一段岩盐的物理特征和分布规律进行了系统分析,运用水平投影地质块段法对研究区沙一段岩盐矿资源量进行了评价。研究结果表明东濮凹陷沙河街组沙一段岩盐矿石多为灰白色中晶结构,块状构造,主要成分为Na Cl,品位一般70%~95%,种类为石盐,成分较简单;研究区可划分为6个成盐区,其中户部寨-王楼成盐区和王称固-梨园成盐区分布面积较广,且盐层数量多、厚度大;沙一段靠近沉积中心含沙一1~沙一9共9个岩盐矿层,其中沙一3~沙一9在区内广泛分布,以沙一9盐矿层连续性最好、厚度最大、分布最广;估算得沙一段岩盐矿石资源量共466.68亿吨,平均品位86.30%。Through the methods of regional geological survey, cores description and experiments, physical features and distribution law of the rocky salt in of first member of Shahejie Formation, Paleogene in Dongpu Depression were systematically analyzed. And its resource assessment was done by horizontal projected geological ore block method. It is indicated that The rocky salt is grayish white, microtek texture and massive structure. The major composition is Na Cl, with a general grade of 70~90 %. It belongs to halite and has simple composition. It is concluded that strata and ore beds of Shahejie Formation in Dongpu Depression have the characteristics of multiple cycles and rhymes. The area was divided into 6 salifying regions, among which, Hubuzhai-Wangjialou Salifying Region and Wangchenggu-Liyuan Salifying Region covered larger area of salifying region and contained much more and thicker salt beds. There were 9 salt beds near the depocenters. They were No.1 to No.9 salt bed of first member of Shahejie Formation. No.3 to No.9 salt bed were more widespread, especially for No.9 salt bed, which has the best continuity, largest thickness and widest distribution. It is calculated that the total quantity of resource was 46.668 billion tons, with an average grade of 86.30%.

关 键 词：岩盐 物理特征 分布规律 资源评价 东濮凹陷 

分 类 号：P619.21[天文地球—矿床学]