高寒浅覆盖景观区深穿透地球化学勘查技术应用与示范OA

This study aims to address the technical challenges in exploring concealed ore bodies in alpine shallow overburden areas.Hence,it conducted the application test and demonstration of deep-penetrating geochemical exploration techniques in two typical land-scape areas:the low-to-middle mountainous desert steppe and the alluvial-proluvial gravelly Gobi along the periphery of the Qaidam Basin.The results show that the proportions of fine-grained(d≤96 μm),micro-fine-grained(d≤20 μm),and ultra-fine-grained(d≤5 μm)materials in the overburden serve as the core basis for evaluating the effectiveness and adaptability of deep-penetrating geochemi-cal exploration techniques.Through the multi-technique effectiveness tests conducted in the Relong and Yuka gold deposits,the differ-ences in application efficiency of various techniques across different landscape areas were clarified.The measurement of micro-fine-grained soils was employed for a large-scale demonstration application,with the delineated anomalies highly coinciding with the known mineralized zones.Moreover,a concealed ore body with a gold grade of up to 3.85 g/t was discovered in the Relong gold deposit.Final-ly,a three-level technical combination,consisting of regional reconnaissance,anomaly verification,and ore body positioning,was pro-posed for alpine shallow overburden areas.Overall,the results of this study provide technical support for the exploration of concealed ore bodies in similar areas.