岩屑测量在甘肃北山水系沉积物测量弱异常区的找矿效果:以盐池黑山南金矿的发现为例  

Ore Prospecting Effect of Cuttage Survey in Weak Anomaly Area of Stream Sediment Survey in Beishan,Gansu Province:Taking the Discovery of Heishannan Gold Mine in Yanchi as An Example

作　　者：刘永彪 李省晔 赵吉昌 樊新祥 杨镇熙 陈海云 LIU Yongbiao;LI Shengye;ZHAO Jichang;FAN Xinxiang;YANG Zhenxi;CHEN Haiyun(Fourth Institute of Geological and Mineral Exploration of Gansu Provincial Bureau of Geology and Mineral Resources,Jiuquan,Gansu 735000,China)

机构地区：[1]甘肃省地质矿产勘查开发局第四地质矿产勘查院,甘肃酒泉735000

出　　处：《现代地质》2022年第6期1525-1537,共13页Geoscience

基　　金：甘肃省基础地质调查项目“甘肃省肃北县双井子—龙蛇头一带金铜多金属矿产调查评价”(甘财经二[2018]132号)、(甘财资环[2020]28号),“甘肃省玉门市前红泉—黑山北滩地区1∶5万矿产远景调查”(甘财经二[2017]105号、甘财经二[2018]59号、甘财经二[2019]39号)。

摘　　要：研究区地球化学景观属于甘肃北山干旱荒漠戈壁残山区,通过1∶2.5万水系沉积物测量在北山盐池黑山一带圈定多处金弱异常。为突出成矿及指示元素的地球化学异常特征,提高找矿效果,优选水系沉积物测量金弱异常,开展1∶1万岩屑测量,利用相关性及R型聚类分析对元素组合特征进行分析、归纳,并圈定单元素异常和综合异常。对成矿前景较好的2处综合异常,采用踏勘追索、大比例尺地质填图及探槽等手段进行查证,发现了盐池黑山南金矿,实现了在水系沉积物弱异常区的找矿突破,研究成果充分证实岩屑测量在甘肃北山干旱荒漠戈壁残山区进行地质找矿的有效性,为北山水系沉积物测量弱异常区找矿提供了新的途径。The geochemical landscape of the study area belongs to the Gobi remnant mountain area of the arid desert in Beishan,Gansu,and several gold-weak anomalies were delineated in the area of Yanchi Heishan in Beishan by 1∶25000 water system sediment measurement.In order to highlight the geochemical anomaly chara-cteristics of mineralization and indicator elements and improve the prospecting effect,1∶10000 cuttings measu-rement was carried out to achieve target area optimization of the gold weak anomaly of stream sediments,the characteristics of element combination are analyzed and summarized by correlation and R-type cluster analysis,and single element anomalies and comprehensive anomalies are circled.Two comprehensive anomalies with good metallogenic prospects are verified by means of reconnaissance and recourse,large-scale geological mapping and exploration troughs,and Heishannan gold mine in Yanchi is discovered,prospecting breakthrough in the weak anomaly area of the sediment of the stream system was achieved,which fully confirms the effectiveness of cuttings survey in geological prospecting in the arid desert Gobi remnant mountain area of Beishan river system in Gansu Province,and provides a new way for prospecting in the weak anomaly area of sediment survey in Bei-shan river system.

关 键 词：地球化学勘查 岩屑地球化学测量 水系弱异常区 金矿 北山 甘肃 

分 类 号：P6223[天文地球—地质矿产勘探] P595[天文地球—地质学]