GIS-based mineral potential modeling by advanced spatial analytical methods in the southeastern Yunnan mineral district, China
GIS-based mineral potential modeling by advanced spatial analytical methods in the southeastern Yunnan mineral district, China
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DOI：
10.1016/j.oregeorev.2014.09.032
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发表时间：
2015-12
影响因子：
3.3
通讯作者：
Wenlei Wang;Jie Zhao;Q. Cheng;E. Carranza
中科院分区：
文献类型：
--
作者：
Wenlei Wang;Jie Zhao;Q. Cheng;E. Carranza
本文介绍了一种基于奇异性理论的成矿势图建模方法，并在此基础上提出了应用局部回归方法研究滇东南锡铜多金属矿床成矿作用的思路。成矿作用是一个典型的级联过程，通常伴随着不规则的地质、地球化学和地球物理特征。奇异性指数作为一种有效的异常分析工具，有助于识别异常并描述异常的形成过程。本研究利用基于奇异性的矿产潜力制图方法来表征该地区与岩浆、构造和沉积过程相关的热液成矿作用。在此基础上，建立了一个矿产远景模型，以划定靶区。除了矿产的远景，控制成矿作用的地质过程是空间非平稳的。因此，地理加权回归分析，以调查这些空间变化的控制作用，它有助于提高认识，在研究区的局部成矿作用。空间分析的结果可用于指导该区的后续找矿工作。
This paper demonstrates a modeling procedure of mineral potential mapping based on singularity theory, and further presents an idea to look into metallogeny of Sn–Cu polymetallic deposits in southeastern Yunnan mineral district, China by applying a localized regression method. Mineralization is a typical cascade process generally accompanied by irregular geological, geochemical and geophysical signatures. Singularity index as an efficient anomaly analytical tool helps to identify anomalies as well as characterize formation processes of these anomalies. In this study, the singularity-based mineral potential mapping method was utilized to characterize hydrothermal mineralization associated with magmatic, tectonic and sedimentary processes in this district. Based on the results, a mineral prospectivity model was constructed to delineate target areas. In addition to mineral prospectivity, controlling effects of geo-processes on mineralization are spatially non-stationary. Geographically-weighted regression analysis was thus employed to investigate these spatially-varied controlling effects and it has contributed to improve understanding to local metallogeny in the study area. Results of the spatial analysis presented can be used to guide following stages of mineral exploration in the district.