摘要
通过对青海省刚察地区1∶50000水系沉积物测量数据的处理发现,该区Au元素的标准化方差和变异系数变化幅度大,数据跳跃性强,可塑性较高;区内Au元素与As、Sb、Hg等金常规指示元素关系并不密切,而地球化学图、因子计量图均显示Au、Ti、V、Co四元素关系密切;同时,晚寒武世六道沟组(∈3l)地层为区内许多元素的高背景区,构成区内主要的找矿有利区段。因此在区内寻找金矿,需主要关注该地层中的Au、Ti、V、Co元素组合异常。通过对综合异常分析、筛选,认为该地层内的HS36综合异常找金前景较好;后期对HS36号异常开展了1:10000土壤测量,进一步分解出七处土壤异常,Au峰值可达30 g/t以上,确定为矿致异常。综合分析认为,研究区成矿事实清楚,断裂构造明显、Au元素化探异常峰值极高、强度极强,具有寻找金矿床的巨大潜力。
Through a series of collections and treatments around the data in the river system sediments,measured by the scale of 1:50,000 in Gangcha Region of Qinghai Province,we find that both standardized variance and variation coefficient appear wide-range variations,strong data fluctuations and high flexibilities therein.Although the relationships among a batch of conventional metal indicated elements,such as Au,As,Sb and Hg are less strongly linked,the 4 elements of Au,Ti,V and Co appear quite close relations viewed from the geochemical chart and the factor score map.At the same time,within the geologic stratum of late Cambrian Liudaogou Group(∈3l),many elements appear high-background values therein.It's expected that,in this stratum,a considerable number of main preferable ore-finding areas are widely scattered.Therefore,for purpose of finding gold ores therein,it's of much necessity to pay more attention to combination anomalies of these elements,inclusive of Au,Ti,V and Co.By means of analyzing and screening HS36 synthetical anomaly phenomenon therein,we think that this stratum has a good prospect of exploring gold ores;Next,we conducted a series of soil-measuring work by the scale of 1:10,000 upon such HS36 synthetical anomaly phenomenon for further resolving totally 7 soil anomalies.In this stratum,the peak of Au can reach over 30g/t for further identify as anomaly related to mineral deposit.According to the comprehensive analysis,it is thought that the ore-forming fact is clear,and the faulted structure is relatively apparent,as well as Au has extremely high geochemical anomaly peak and extremely strong intensity value in the research region for certifying that it has a huge potential for exploring gold deposit.
作者
熊寿加
何皎
白宗海
李永虎
黄青华
保善东
XIONG Shoujia;HE Jiao;BAI Zonghai;LI Yonghu;HUANG Qinghua;BAO Shandong(Northern Qinghai-Tibet plateau geological process and mineral Resources Laboratory, Xining 810012, China;Qinghai geological survey institute, Xining 810012, China)
出处
《物探化探计算技术》
CAS
2020年第2期285-294,共10页
Computing Techniques For Geophysical and Geochemical Exploration
基金
青海省科技厅应用基础研究项目(2018-ZJ-779)。
关键词
地球化学勘查
数据处理
综合异常
找金预测
geochemical exploration
data processing
comprehensive anomaly
gold prediction
