热释卤素法在安徽胡村铜钼矿深部的找矿试验

热释卤素找矿方法是一种深穿透地球化学找矿方法,但一直未推广应用。笔者选择了湿润中低山丘陵冲洪积物覆盖地球化学景观区的狮子山矿田胡村深部铜钼矿,开展了热释卤素找矿方法可行性研究。将土壤热释卤素及常规土壤测量结果对比发现:土壤热释卤素( F、Cl)异常能够有效指示深部矿体,且能有效排除岩体等因素的干扰;常规土壤卤素异常对深部矿体指示意义有限,但不具普遍性;常规土壤测量元素异常受岩体、接触带及浅表矿化影响较大,对深部矿体指示意义具有局限性,其中Ba负异常对热液蚀变带具有一定指示意义。土壤热释卤素异常位置与深部矿体赋存空间有良好的对应,含量变化趋势基本一致,异常表现为多峰形式,而且异常一般形成于矿体垂直投影正上方,这与前人研究结论相似。初步认为,在长江中下游冲洪积物覆盖区深部矿体定位阶段,可以试用土壤热释卤素找矿方法。

The preliminary application of the heat released halogen method to the prospecting for deep orebody in the Hucun copper-molybdenum deposit,Anhui Province

The heat released halogen method, a deep?penetrating geochemical method for ore exploration, has not been used extensively yet. The authors carried out the research on the feasibility this method in the Hucun copper deposit of Anhui Province char?acterized by moist hills and low mountain eluvial?slope wash covered geochemical landscape area. Based on a comparison of soil heat re?leased halogen with the conventional soil survey, the authors have reached some conclusions: The heat released halogen method has more advantages than the conventional soil survey in that it can effectively eliminate the interference of rock body. The indicating signifi?cance of conventional soil halogen anomalies is limited and has no universality. The element anomalies of conventional soil survey are impacted by rock body or its contact zone and superficial mineralization, and hence their indicating significance has limitation;never?theless, the barium negative anomaly area has a fairly good indicating significance for hydrothermal alteration zone. The heat released halogen anomalies correspond well with deep orebody space, the element content has similar change tendencies, and the heat released halogen anomalies appear on the surface of the vertical projection part of the orebody, which is consistent with previous conclusions. It is tentatively held that we can try to use the heat released halogen method at the deep orebody positioning stage in the Yangtze River hill and low mountain eluvial?slope wash covered geochemical landscape area.