柴达木盆地宗马海湖地区钾盐矿床成矿规律与成矿预测研究  

Study on Metallogenic Regularities and Metallogenic Predication of Potassium Salt Deposit in Zongmahaihu Area of Qaidam Basin in Qinghai Province

作　　者：崔庆岗 侯新星 来永伟 赵淑芳[3] 魏斌 CUI Qinggang;HOU Xinxing;LAI Yongwei;ZHAO Shufang;WEI Bin(Shandong Geological Prospecting Institute of China Chemical and GeologicalMine Bureau,Shandong Tai’an 271000,China;Geological Exploration Instituteof the First Exploration Bureau of CNACG,Hebei Handan 056004,China;TaishanChemical Company of Xinwen Mining Group,Shandong Tai’an 271024,China;No.5Exploration Institute of Geology and Mineral Resorces,Shandong Tai’an 271021,China)

机构地区：[1]中化地质矿山总局山东地质勘查院,山东泰安271000 [2]中国煤炭地质总局第一勘探局地质勘查院,河北邯郸056004 [3]新汶矿业集团泰山盐化工分公司,山东泰安271024 [4]山东省第五地质矿产勘查院,山东泰安271021

出　　处：《山东国土资源》2019年第10期17-25,共9页Shandong Land and Resources

基　　金：中国地质调查局“青海省冷湖行委宗马海湖地区J46E010015,J46E010016,J46E011016,J46E011017四幅1∶5万区域地质调查”,项目编号12120113033030

摘　　要：研究区位于柴达木盆地北部边缘,属柴达木盆地中—新生代盐类成矿区。该次研究了浅部、中深部及深层储层特征、卤水钾盐的赋存规律及构造控矿理论。浅部卤水钾盐依据KCl含量,分为工业品位区、边界品位区、有浅层卤水区及无浅层卤水区。中深部卤水钾盐分布于山间古冲洪积平原(Ⅰ4^2-3)和马海湖次级洼陷(Ⅰ4^2-5)中,矿层厚度较大的区域在马海湖次级洼陷(Ⅰ4^2-5)北部,主要分布于全新统—更新统含盐系中,计算深度297.22m。深部卤水钾盐,厚度较薄者分布于冷湖六号、冷湖七号构造以北地区的一层至数层的砂岩及砂砾岩层中,自南东向北西由深变浅,分布于上新统,含卤水层段厚约50~250m。厚度较大者分布在赛什腾山山前冲洪积带,北至驼南断裂,南大致至ZK4012孔一线,孔隙卤水层累计深度达1265.14m,分布于全新统—上新统,是今后寻找深层卤水钾盐矿最重要的找矿区域。The study area is located in the northern edge of Qaidam basin. It belongs to Mesozoic Cenozoic salt mineralization area in Qaidam Basin. The characteristics of shallow, middle and deep, deep reservoirs, the occurrence law of brine potassium salts and the theory of structural ore control have been studied. The shallow brine potassium salt can be divided into industrial grade area, boundary grade area, shallow brine area and non shallow brine area according to the content of KCl. Potassium salt in the middle and deep part distributes in the intermountain paleoalluvial plain (Ⅰ 4^2 -3)and Mahaihu secondary degression (Ⅰ4^2- 5), brine potassium salts with large thickness is located in the north of Mahaihu secondary degression (Ⅰ4^2-5 ), and distributed in Holocene Pleistocene salt bearing system. The thickness of brine bearing layers is about 50~250m. The thicker ones are distributed in the alluvial diluvial belt in front of Saishteng mountain, the north is to Tuonan fault, and the south is to the ZK4012 hole. The accumulative depth of porous brine layer is 1265.14m, and distributed in Holocene Pleistocene. It is the most important prospecting area for deep brine potash deposits in the future.

关 键 词：钾盐 成矿预测 成矿规律 二维地震勘探 宗马海湖地区 柴达木盆地 

分 类 号：P619.2[天文地球—矿床学]