Geochemical characteristics and prospecting potential analysis based on stream sediments survey in Dakcheung,Xekong province,Laos

This paper is the result of geochemistry research.[Objective] The Sekong Dakcheun area in Laos is located in the geochemical prediction zone of mineralizing elements in southern Laos, with superior mineralization potential.Geochemical exploration are carried out in this area to narrow down the target area for mineralization and provide a basis for the next geological prospecting.[Methods]Based on the geochemical exploration of 1/50 000 stream sediments, 19 elements were analyzed, the distribution of each element and its characteristic parameters were statistically analyzed, the discrete and enrichment patterns of the elements, the characteristics of the element combinations and their relationship with the geological conditions of mineralization were summarized, and the distribution of the elements in the different stratigraphic layers(geologic bodies)was preliminarily investigated.[Results]The study concludes that Au, Sn and Pb are the main metallogenic elements in the study area, element Au is highly enriched and discrete in sericite schist and biotite granite, Sn is more enriched and discrete in sericite schist, and Pb is more enriched and discrete in biotite granite.[Conclusions] Combined with the geological conditions and geochemical characteristics of mineralization, 10 geochemical anomalies have been identified, and 3 prospecting areas have been divided on the basis of the comprehensive study.The anomaly verification work was carried out, and the HS8 comprehensive anomalies were finally selected to define the DaLong mineralization prospective area as having a large mineralization potential, which will provide a basis for the next stage of the geological prospecting work.