摘要
为了缩小找矿靶区,提高找矿效率,在青海哈西亚图地区进行了1∶1万高精度磁法测量。通过磁测工作,圈定了4处异常,异常编号为C-1、C-2、C-3、C-4,异常与研究区的土壤地球化学异常和可能含矿的地段相对应。根据磁异常的解释结果,采用少量探槽工程揭露,查明了引起异常的原因,结合研究区内地层、构造、岩浆岩分布,发现了M3蚀变带,查明了蚀变带的蚀变类型和含矿特征,M3蚀变带经探槽取样分析,单样WO3品位达到0. 03%,为下一步深部寻找钨矿体提供了线索。从而说明了地面高精度磁法测量寻找钨矿床的可行性和有效性。
1∶10 000 high-precision magnetic survey was conducted in Haxiyatu region of Qinghai to narrow down prospecting target area and improve prospecting efficiency.Through magnetic survey,4 anomalies were delineated namely the C-1,C-2,C-3 and C-4.The anomalies corresponded to the soil geochemical anomalies in the region and the would-be ore-hosting spots.According to the interpretation of the magnetic anomaly and the revelation of a few trenching projects,the causes of these anomalies were found out.Based on the distribution of strata,structures and magmatic rocks in the research area,M3 alteration zone was found as well as its type and ore-hosting features.Samples from trenching in M3 alteration zone were analyzed.The results show that WO 3 grade in single sample reaches 0.03%.The research provided hints for next-step prospecting for tungsten ore bodies in deep section,and therefore proved the feasibility and effectiveness of ground high-precision magnetic method for tungsten deposit exploration.
作者
周瑾
张瑶
路睿
白洪溪
李海宾
靳浩
沈娟
Zhou Jin;Zhang Yao;Lu Rui;Bai Hongxi;Li Haibin;Jin Hao;Shen Juan(Qinghai Geological Survey;Guangzhou Marine Geological Survey)
出处
《黄金》
CAS
2018年第10期22-26,共5页
Gold
基金
青海省地质勘查基金项目(青国土资矿[2015]83号)
关键词
地面高精度磁法
磁异常
蚀变带
钨矿体
哈西亚图地区
青海
ground high-precision magnetic method
magnetic anomaly
alteration zone
tungsten ore body
Haxiyatu region
Qinghai
