中国钾盐矿产预测评价模型和资源潜力分析  

Potash assessment models and resource potential analysis in China

作　　者：商朋强 祁才吉[2] 焦森[3] 熊先孝 关炳庭 张杨 SHANG Pengqiang;QI Caiji;JIAO Sen;XIONG Xianxiao;GUAN Bingting;ZHANG Yang(General Institute of Chemical Geological Survey,China Chemical Geology and Mine Bureau,Beijing 100013,China;Geological Institute of China Chemical Geology and Mine Bureau,Zhuozhou 072750,Hebei,China;China Chemical Geology and Mine Bureau,Beijing 100013,China;Yunnan Jinchangjiang Mineral Co.,Ltd,,Kunming 650101,Yunnan,China)

机构地区：[1]中化地质矿山总局化工地质调查总院,北京100013 [2]中化地质矿山总局地质研究院,河北涿州072750 [3]中化地质矿山总局,北京100013 [4]云南金长江矿业有限公司,云南昆明650101

出　　处：《地质通报》2019年第10期1758-1767,共10页Geological Bulletin of China

基　　金：中国地质调查局项目《东部地区硼磷萤石等重要非金属矿产调查》(编号:DD20160057)、《江西赣南—福建浦城地区战略性萤石硼资源调查》(编号:DD20190816)、《中国矿产地质与区域成矿规律综合研究(中国矿产地质志)》(编号:1212011220369)

摘　　要：为摸清全国钾盐矿资源家底,制定科学合理的经济产业政策,依据全国矿产资源潜力评价数据和成果,系统地开展了中国钾盐矿成矿特征研究和资源潜力评价。研究和评价结果显示,中国钾盐矿已发现的矿产资源以第四纪盐湖型钾盐矿为主,成矿时代以第四纪为主。钾盐矿主要分布在西部大型新生代陆相成盐盆地,在空间上可划分为12个Ⅲ级成矿区带。在典型矿床、区域成矿要素和预测要素研究的基础上,归纳总结了第四纪盐湖型、深藏地下卤水型、碎屑岩型、碳酸盐岩型4类钾盐矿的预测评价模型特征。以成矿系列理论为指导,采用矿床模型综合地质信息预测方法,共圈定钾盐矿最小预测区320个,归并圈定了42个3级预测区,并对各预测区进行了定量预测评价,6000m以浅钾盐矿预测资源量计32.63×10^8t(KCl),其中500m以浅钾盐矿预测资源量计15.10×10^8t。分析结果显示,全国以柴达木盆地及北缘钾盐成矿带和塔里木盆地钾盐矿成矿带预测资源量较大,预测资源量主要为第四纪盐湖型和深藏地下卤水型。潜力预测工作较全面地反映了当前的钾盐矿床地质和勘查信息资料水平,对指导钾盐矿地质找矿工作具有重要意义。Aimed at calculating ore resources and providing proposal of scientific industrial policy,the authors carried out scientific researches on mineralization characteristics and assessment of resource potential in the past several years.The discovered potash deposits,which can be divided into 12Ⅲgrade metallogenic belts,are mainly of Quaternary saline lake-type located in Cenozoic continental basin in western China with a Quaternary metallogenic age.On the basis of researches on typical deposits,regional metallogenic and predictive factors,four different kinds of potash metallogenic prediction models were summarized,namely Quarternary salt lake type,deep-subterranean bittern type,clastic rock type and carbonate type.Adopting comprehensive geological information model,the authors delineated 320 minimum predicting areas and 42 grade Ⅲ prediction areas.Furthermore,3.263 billion tons of KCl at the depth shallower than 6000m and 1.51 billion tons of KCl at the depth shallower than 500m were predicted on the basis of metallogenic prediction model proposed by the authors.These researches indicate that the north Qaidam Basin and Tarim Basin carry more potash resources quantity than other places in China and the potash resources in the two basins are mainly of Quaternary salt-lake type and deep-subterranean bittern type.These resource potential predictions reveal the degree of the present study of potash deposits and are of great significance for potash prospecting.

关 键 词：钾盐矿 成矿特征 矿产预测评价模型 资源潜力 

分 类 号：P612[天文地球—矿床学] P619.211[天文地球—地质学]