Research on the Combination of Prospecting Techniques in Complicated Geological Background:Taking the Massive Sulfide Deposit in the Liuwanqu Area of Qinghai Province as an Example
The massive sulfide deposits in the Liuwanqu ore concentration area of Qinghai Province are important marine volcanic rock type deposit in North Qilian area. The ore body occurs in subvolcanic rocks,and the distribution of ore bodies is difficult to determine due to late tectonic events. Since the 1990s,the polymetallic ore prospecting in this area has made use of geological,geophysical,geochemical,remote sensing and other methods,involving a variety of geological work in this area and its surrounding areas. However,the application effects of different methods and different geophysical and geochemical exploration in the copper polymetallic ore prospecting in this area have not been systematically summarized,so there has been no breakthrough in the ore prospecting. This work analyzed the thickness of the overburden layer,the geological characteristics of the deposit and ore body,and the characteristics of different geophysical and geochemical exploration anomalies. The characteristics of geophysical and geochemical exploration under the geological background were analyzed to delineated the prospecting target. By deep drilling verification,hidden ore bodies were discovered and industrial ore body was delineated in the unknown area of old oreblock. At the same time,better exploration clues have been proposed in the peripheral area of the mining district,such as Xiaogougounao-Weixiagou. A comprehensive analysis suggests that various geophysical and geochemical exploration methods have shown practical effectiveness in mineral exploration in this area. It is determined that an effective combination of exploration techniques in this area includes gravity surveys,induced polarization,geogas gas surveys,controlled source electromagnetic surveys,and drilling. This can provide valuable reference for "where to explore and how to explore" in the upcoming strategic breakthrough actions in mineral exploration.
Cu-Pb-Zn depositold mining areaprospecting technologymethod combinationLiuwanquQinghai Province
万方数据
维普
