黑龙江省嫩江市播根里地区地球化学异常特征及找矿潜力

在黑龙江多宝山地区1：5万矿产远景调查及黑龙江省嫩江县霍龙门乡播根里金矿普查项目成果基础上，综合分析区域成矿规律和物化探异常特征，讨论其找矿潜力.1：5万化探异常特征显示以Au异常为主，Au强度较高，多达内带，并与Ag异常关系较密切.结合1：5万物探特征及遥感等信息，在研究区内圈定6处综合异常.其中，08XHt-3号异常中的Au-20异常面积为3.79 km²，异常最大值为43.1×10^-9，平均值为7.53×10^-9，达内带；08DHt-11号异常中的Au-47异常面积为2.157 km²，异常最大值为29.9×10^-9，平均值为8.58×10^-9，达内带.进一步开展的1：1万大比例尺物化探工作显示Au异常重现性好，与物探异常相吻合.其中圈定的BG12HtAu-22号金元素异常最大值为115.9×10^-9，平均值为23.55×10^-9，异常达到内带；BG12HtAu-42、43号金异常最大值分别为43.6×10^-9、25.7×10^-9，异常均达到中带.综合分析区域成矿规律、研究区成矿条件，结合物化探异常特征以及少量工程查证发现的1条金矿体和5条金矿化体，认为研究区具有较大的找矿潜力，值得继续开展进一步的查证工作.

GEOCHEMICAL ANOMALY AND PROSPECTING POTENTIAL IN BOGENLI AREA,HEILONGJIANG PROVINCE

On the basis of 1:50000 mineral prospective survey in Dubaoshan area and gold deposit general prospecting results in Bogenli area of Nenjiang City, Heilongjiang Province, the paper comprehensively analyzes the regional metallogenic regularity, characteristics of geophysical-geochemical anomalies and prospecting potential. The 1:50000 geochemical anomaly characteristics show that Au anomaly is dominant, with high anomaly strength, most reaching the inner zone and closely related to Ag anomaly. Six comprehensive anomalies are delineated combined with the 1:50000 geophysical prospecting characteristics and remote sensing information. For the 08XHt-3 anomaly, the Au-20 anomaly area is 3.79 km² with the maximum value of 43.1×10^-9, averagely 7.53×10^-9, reaching the inner zone. In the 08DHt-11, the Au-47 anomaly area is 2.157 km² with the maximum value of 29.9×10^-9, averagely 8.58×10^-9, reaching the inner zone. The later geophysical-geochemical prospecting in 1:10000 scale shows good reproducibility of Au anomaly, which is consistent with geophysical anomaly. The maximum Au anomaly value of delineated BG12HtAu-22 is 115.9×10^-9, averagely 23.55×10^-9, reaching the inner zone. The maximum Au anomaly values of BG12HtAu-42 and BG12HtAu-43 are 43.6×10^-9 and 25.7×10^-9 respectively, both reaching the middle zone. Through comprehensive analysis of the regional metallogenic regularity and mineralization conditions in the study area, combined with the characteristics of geophysical-geochemical anomalies and 1 gold orebody and 5 mineralized bodies discovered by a few engineering verification, it is considered that the study area has great prospecting potential and is worthy of further investigation.