云南个旧多金属矿石门坎——保和地区Sn、Sb元素的成矿信息识别与提取

Identification and extraction of metallogenic information of Sn and Sb in Shimenkan-Baohe area,Gejiu poly-metallogenic deposit,Yunnan Province

石门坎—保和地区位于云南个旧多金属成矿区西南部,成矿背景复杂,成矿作用具有多期性和多样性。利用研究区1∶1万土壤化探数据,采用泛克里格法和因子分析相结合的方法,提取不同层次的成矿异常信息。结果表明:主因子F_3包含Mo-Au-Sb等元素,反映成矿过程中的岩体和热液相关信息;主因子F_4包含Sn-Bi-W元素,指示中低温热液矿化环境; Sb沿杨家田断裂呈串珠状分布,反映了由北东向构造控制的空间变化特征,与已知矿点对应良好; Sn元素异常在研究区北部呈双峰状环形分布,推测受隐伏岩体或者断层控制。根据元素组合异常F_3和F_4的分布规律,结合地质资料圈定出2个找矿靶区,为进一步找矿工作提供了方向。

Located in the southwest of the Gejiu poly-metallogenic area, Yunnan Province, the Shimenkan-Baohe area is of complexmetallogenic background and multi-phase and diversified mineralization. Based on the soil geochemical exploration data at a scale of1 ∶10 000 in the study area, this paper uses Universal Kriging and the factor analysis method to extract different levels of metallogenicanomaly. The results show that the main factor F3 contains Mo-Au-Sb and other elements, reflecting the rock mass and hydrothermalfluid in the process of mineralization; the main factor F4 includes Sn-Bi-W elements, indicating the mediumlow temperature hydro？thermal environment; Sb is distributed along the Yangjiatian fault in a beaded shape, reflecting the spatial variation characteristics ofthe northeastward tectonic control, and is well correlated with the known mineral occurrences; the Sn element anomaly is in a double？peaked distribution in the northern part of the study area, presumably subject to the concealed rock mass or fault; the distribution regularity of elemental combination anomalies F3 and F4 and geological data are used to delineate two prospecting targets, providing direction for further prospecting.