地质学报Issue(11)：2111-2118,8.
湖北潜江凹陷古近系深层富钾卤水矿床特征及成因
Characteristics of Paleogene Deep Potassium-Rich Brines in the Qianjiang Depression,Hubei Province
摘要
Abstract
Qianjiang depression is one of the important Paleogene potassium-bearing brines deposits.Based on detailed field geological investigation, two-dimensional and 3D seismic interpretation, logging interpretation and chemistry analysis,this paper studied the reservoir characteristics,brines forming regularity,geochemical characteristics and deposit genesis.Potassium-rich brine occurs mainly in the Qianjiang Group with an area of 1630 km2 .The hydrochemical type of brines is mainly sodium-sulfate subtype,with salt-water system of Na,K//Cl,SO4-H2 O,and is secondarily calcium-chloride type, magnesium-sulfate subtype and carbonate type.The average salinity of brines is 280.94 g/L and pH value is between 9 and 5.The reservoir of brines is sandstone,thus the distribution of brine is mainly controlled by the distribution of sandstone body.The burial depth of the brines group floor shows the distribution feature of “one depression with two slope”,and the cumulative thickness of the brines ore body is gradually thinning from north and south. It center on syncline along the east-west direction, the cumulative thickness has gradually increased to the east and the west.The brines distribution is closely relatecl to ancient landform of depositional period on the plane.The brines salinity is maximum in Banghu, Wangchang and Zhouji that are the settlement center of syncline,and the contents of KCl,B2 O3 ,LiCl and Br are relatively higher,which reaches the grade for comprehensive utilization.关键词
潜江凹陷/富钾卤水/地质特征/储层展布/地球化学Key words
Qianjiang depression/potassium-rich brines/geological features/reservoir distribution/geochemistry引用本文复制引用
马黎春,黄华,张连元,刘成林,孙明光,牛磊..湖北潜江凹陷古近系深层富钾卤水矿床特征及成因[J].地质学报,2015,(11):2111-2118,8.基金项目
本文为国家重点基础研究发展计划“973”项目（编号2011CB403007）、国家高技术研究发展计划“863”项目（编号2012AA061701）、中国地质调查项目（编号 N1303）和留学人员科技活动择优项目（编号 A1406）共同资助成果。 （）
