甘肃北山老君庙北金矿土壤地球化学特征及找矿前景

Geochemical characteristics of soils and prospecting potential of the northern Laojunmiao gold deposit in the Beishan area,Gansu Province

甘肃北山老君庙北金矿位于甘肃北山南带,属于塔里木陆块东北缘,为窑洞梁—小西弓古元古代裂谷盆地构造环境。本次找矿通过1∶10000土壤地球化学测量工作,圈定了综合异常区5个,综合异常经槽探工程验证,新发现金矿体3条、金银矿体1条、低品位金矿体2条,取得了较好的找矿成果。同时,结合矿区地质、地球化学综合异常特征,建立了以HT1综合异常区为主体的地质—地球化学综合找矿模型,并提出了下一步找矿方向,为矿区深部和外围找矿工作提供了重要的参考依据。

Thenorthern Laojunmiao gold deposit is located in the southern zone of the Beishan area,Gansu Province,and on the northeastern margin of the Tarim block.It resides in a tectonic environment of the Yaodongliang-Xiaoxigong Paleoproterozoic rift basin.This study delineated five comprehensive anomaly zones in the area through a 1∶10,000 geochemical soil survey.As verified by trenching exploration,three gold ore bodies,one gold-silver ore body,and two low-grade gold ore bodies were identified in the comprehensive anomaly zones,suggesting satisfactory prospecting results.Based on the comprehensive geological and geochemical anomaly characteristics of the deposit,this study established an integrated geological-geochemical prospecting model centering on the HT1 comprehensive anomaly zone.Moreover,it proposed the subsequent prospecting direction,providing a significant reference for the deep and peripheral prospecting in the area.