甘肃省天干族地区地球化学特征与找矿远景

Geochemical Characteristics and Exploration Perspective in the Tiangan Area, Gansu Province

天干族地区地处川、甘、陕“金三角”内,成矿地质条件较好。本文通过1∶5万水系沉积物测量,统计了研究区Au、As、Sb、Hg等18种元素的变化系数及相关系数等。初步认为研究区Au、As、Sb、Hg等元素离散程度相对高,区内易于富集成矿;根据异常特征和成矿地质条件分析,可知异常与断裂构造关系密切,其成矿类型主要为浅成低温热液型;共圈定4个综合异常区,优选3处成矿远景区,即尕地沟锑汞成矿远景区、黑峪沟金铁锰成矿远景区、大草坡-鹰嘴岩金砷成矿远景区,为后续的矿产调查工作提供依据。

The Tiangan area is located in the "Golden Triangle" of Sichuan,Gansu and Shaanxi.Based on the 1∶50000 geochemical data of stream sediments in in the study area,the change characteristics,and correlation coefficients of 18 elements such as Au,As,Sb,and Hg were calculated.It is preliminarily considered that the dispersion degree of elements such as Au,As,Sb and Hg in the study area is relatively high,and the area is easy to be enriched and integrated into ore.Based on the analysis of the anomaly characteristics and metallogenic geological conditions,it can be seen that the anomaly is closely related to the fault structure,and its ore-forming type is mainly epithermal deposits,3 comprehensive anomaly areas are delineated and 4 metallogenic prospects are optimized,namely Gadigou sb-Hg metallogenic prospect,Heiyugou Au-Fe-Mn metallogenic prospect and Dacaopo-Oleczyan au-As metallogenic prospect,it provides the basis for the subsequent mineral Resources investigation.