摘要
音凹峡地区位于北山南带,是甘肃北山地区重要的成矿带,目前地质工作程度较低。通过对音凹峡地区开展1/5万水系沉积物地球化学测量,初步总结了区域地球化学特征,圈定了地球化学异常,为下一步找矿工作部署和成矿规律研究提供了基础资料。运用多元素富集系数累加化探方法,圈定找矿靶区16个。通过对找矿靶区开展概略检查和重点检查工作,在9个靶区中发现矿化线索。研究结果表明:在工作程度较低地区多元素富集系数累加化探方法可以快速缩小找矿范围,确定找矿目标,有助于提高找矿工作效率。
As an important method of geological prospecting,the geochemical survey focuses on the acquisition,interpretation,and evaluation of geochemical data.At present,the main geochemical measurement methods of mineral prospect surveys include stream sediment survey,soil survey,and rock survey.After obtaining the regional geochemical data,extraction of geological information will be the biggest difficulty for geological prospecting.The conventional geochemical data processing method is relatively mature at present,but its efficacy in delineating abnormal areas and locating concentration centers has been drew back by the huge workload of large-scale geological verification.Using geochemical data reasonably to delineate prospecting target areas has become an important task of current geochemical data processing.Yinwaxia area,located in the southern belt of Beishan,Gansu Province,is an important metallogenic belt in Beishan,Gansu Province,with a low degree of geological work.During the 1∶50000 mineral prospect survey,the stream sediment survey was carried out simultaneously,and the content information of 16 elements such as Au,Ag,Cu,Pb,Zn,W,Sn,Mo,As,Sb,Bi,Cr,Ni,Co,Ba and Hg was obtained.And then through conventional geochemical data processing methods,geochemical anomaly maps and comprehensive anomaly maps were compiled,and 32 comprehensive anomalies were delineated.However,there is an urgent problem to be solved here,that is,the number of anomalous areas is large and the area is also large,which leads to excessive workload and individual anomalies that can’t be verified in the field.In order to further determine the prospecting target area accurately,this paper uses the multi-element enrichment coefficient accumulation method to further process the geochemical data.That is,according to the element enrichment characteristics,the enrichment coefficients of each element in the same sample were accumulated to obtain a new variable-enrichment coefficient accumulation value.The accumulation value of the enrichment coefficie
作者
陈海云
龚振中
杨镇熙
任长旭
周兆明
CHEN Haiyun;GONG Zhenzhong;YANG Zhenxi;REN Changxu;ZHOU Zhaoming(Fourth Institute of Geological and Mineral Exploration of Gansu Bureau of Geology and Mineral Resources,Jiuquan735000,Gansu,China)
出处
《黄金科学技术》
CSCD
2023年第1期37-49,共13页
Gold Science and Technology
基金
甘肃省基础地质调查项目“甘肃省肃北蒙古族自治县音凹峡—新场地区1/5万矿产远景调查”(编号:甘国土资财发[2015]16号、甘国土资财发[2016]15号、甘财经二[2017]62号、甘财经二[2018]59号)
甘肃省基础地质调查项目“甘肃省玉门市前红泉—黑山北滩地区1/5万矿产远景调查”(编号:甘财经二[2017]105号、甘财经二[2018]59号、甘财经二[2019]39号)
甘肃省科技计划项目“甘肃北山成宣镁铁质—超镁铁质杂岩体成因与找矿潜力研究”(21JR7RA787)
甘肃省科技计划项目“北祁连造山带东段埃达克岩成因及其对区域构造与成矿的制约”(22JR5RA819)联合资助。
关键词
水系沉积物
地球化学特征
多元素富集系数累加
找矿靶区
北山地区
甘肃省
stream sediments
geochemical characteristics
accumulation of multi-element enrichment coefficient
target area of prospecting
Beishan area
Gansu Province
