青海省都兰县查哈西里地区地球化学异常特征及成矿远景评述

通过1：5万水系沉积物的地球化学测量，对查哈西里地区Au、Cu等16种元素的地球化学特征进行了初步分析.综合元素富集程度、分异程度、叠加强度，发现Au、Cu、Ni、Cr、Co在研究区内有富集成矿的可能，是研究区主要成矿元素.根据异常特征与成矿地质条件，推断区内为构造蚀变岩型Au-Cu多金属矿床及热液蚀变型Cu-Ni多金属矿床.优选出4处成矿远景区，即科德日特-巴嘎哈尔散金铜多金属成矿远景区、查干热格沟铜多金属成矿远景区、乌兰可镍多金属成矿远景区和马尼特沟南铁镍多金属成矿远景区.

GEOCHEMICAL ANOMALIES AND METALLOGENIC PROSPECT IN CHAHAXILI AREA OF DULAN COUNTY,QINGHAI PROVINCE

Through the 1:50 000 geochemical survey of stream sediments in Chahaxili area, the paper analyzes the geochemical characteristics of 16 elements such as Au and Cu. Combined with the enrichment, differentiation, and superposition degree of elements, it is found that Au, Cu, Ni, Cr and Co have the possibility of enrichment and mineralization, and serve as the main ore-forming elements in the study area. Based on the anomaly characteristics and metallogenic geological conditions, it is inferred that there are structural altered rock type Au-Cu polymetallic deposits and hydrothermal alteration type Cu-Ni polymetallic deposits in the area. Four metallogenic prospective areas are optimized, including Kederite-Bagahaersan Au-Cu polymetallic prospective area, Chaganregegou Cu polymetallic prospective area, Wulanke Ni polymetallic prospective area and Manitegounan Fe-Ni polymetallic prospective area.