青海省泽库县瓦尔沟地区地球物理、地球化学特征及找矿方向  

Geophysical and geochemical characteristics and prospecting direction in Wa’ergou area in Zeku county of Qinghai province

作　　者：邢佳 王建国[1,2] 张世珍 XING Jia;WANG Jianguo;ZHANG Shizhen(College of Geological Engineering,Qinghai University,Xining 810016,China;State Key Laboratory of Mineral Processing,Beijing 102628,China)

机构地区：[1]青海大学地质工程系,青海西宁810016 [2]矿物加工科学与技术国家重点实验室,北京102628

出　　处：《青海大学学报》2021年第6期94-100,共7页Journal of Qinghai University

基　　金：青海省科学技术厅应用基础研究计划项目(2019-ZJ-7022);矿物加工科学与技术国家重点实验室开放基金(BGRIMM-KJSKL-2020-04)。

摘　　要：为明确青海省泽库县瓦尔沟地区的找矿方向,在分析研究区地质资料的基础上,通过电法勘探、水系沉积物测量等方法,对视电阻率特征、视极化率特征、元素分布特征和异常元素组合特征进行了分析。结果表明:瓦尔沟地区共有六条激电异常带(JD1、JD2、JD3、JD4、JD5、JD6),其中JD2、JD3和JD5表现为低阻高激化特征,与成矿具有良好的相关关系;水系沉积物异常三处(AS-9、AS-15、AS-19),其中Au元素异常规模较大,浓度分带明显,AS-9异常中Au元素的平均值为172.06×10^(-9),峰值为1260×10^(-9),AS-19异常中Au元素的平均值为11.13×10^(-9),峰值为55.4×10^(-9)。因此,瓦尔沟地区具备找矿潜力的矿产为金,赋矿地层位于研究区发育的北西向断裂破碎带中三叠世的隆务河组。研究结论对于丰富成矿规律认识和提高找矿效率具有理论和实际意义。In order to clarify the prospecting direction in Wa’ergou area,Zeku county,Qinghai province,the characteristics of apparent resistivity,apparent polarizability,element distribution and anomalous element combination are analyzed by means of electrical exploration and aqueous sediment measurement based on the analysis of geological data of the study area.The results show that there are 6 IP anomaly zones in the area,including JD1,JD2,JD3,JD4,JD5 and JD6.Among them,JD2,JD3 and JD5 show the characteristics of low resistance and high intensification,which has a good correlation with mineralization.There are 3 stream sediment anomalies,namely AS-9,AS-15 and AS-19,in which the scale of Au element anomaly is large with obvious concentration zoning.The average value of Au in AS-9 anomaly is 172.06×10^(-9) with the peak value of 1260×10^(-9).The average value of Au in AS-15 anomaly is 11.13×10^(-9) with the peak value of 55.4×10^(-9).Therefore,the mineral with prospecting potential in the area is gold.The ore-bearing strata are located in the Middle Triassic Longwu River Formation of the north-west fracture zone developed in the area.This conclusion is of theoretical and practical significance for enriching the understanding of metallogenic rules and improving prospecting efficiency.

关 键 词：青海省泽库县 瓦尔沟地区 地球物理 水系沉积物 找矿方向 

分 类 号：P622[天文地球—地质矿产勘探]