青海扎家同哪金矿勘查区地球化学特征与找矿潜力分析

Geochemical Characteristics and Prospecting Potential of Gold Deposits in the Zhajiatongna Survey District,Southern Qinghai

青海扎家同哪金矿勘查区位于青海省曲麻莱县麻多乡境内。在地质调查基础上,通过区域地球化学1∶20万水系沉积物地球化学测量、1∶5万水系沉积物地球化学测量等区域地球化学扫面工作,成果显示Au、As、Sb、Hg、Cu、Zn、Co、Ni、Ti、Li、SiO2、Fe2O3、Na2O等元素(或氧化物)丰度较高,尤其Au、As、Sb元素在本测区呈现高背景或局部异常,通过对扎家同哪等局部异常的查证,已发现金矿体,区内还有多个局部异常与之类似,显示出矿致异常的特征;此外,引入深穿透地球化学勘查技术-地电化学测量,并在上述基础上,建立元素立体展布特征,分析区域找矿潜力。

The Zhajiatongna survey area for gold deposits is located in Maduo township, Qumarleb county, Southern Qinghai Province. On the basis of regional geological investigations, regional stream -sediment geochemical surveys at scales of 1：200000 and 1：50000 have been carried out in this district. The results show abundant of elements such as Au, As, Sb, Cu, Zn, Hg, Co, Ni, Ti, Li, SiO2 , Fe2O3 and Na2O （ or oxide ）, especially Au, As, and Sb elements exhibit high background values or local anomalies. Verification of these anomalies suggests that there are gold ore bodies and some other similar local anomalies in this area, indicating their relationship with mineralization. In addition, a deep - penetrating geochemical exploration technique of electrochemical measurement was applied in this area to illuminate the three - dimensional distribution of the ore - forming elements and to help analyze the regional prospecting potential.