Where are porphyry copper deposits spatially localized? A case study in benguet province, Philippines

被引：4

作者：

Carranza E.J.M. ^{[1
]}

Hale M. ^{[2
]}

机构：

[1] Mines and Geosciences Bureau, Region 5, Daraga, Albay

[2] International Institute for Aerospace Survey and Earth Sciences (ITC), 7514 AE Enschede

来源：

Natural Resources Research | 2002年 / 11卷 / 1期

关键词：

Porphyry copper; Porphyry plutons; Predictive model validation; Spatial association; Strike-slip fault discontinuities; Weights of evidence modeling;

D O I：

10.1023/A:1014287720379

中图分类号：

学科分类号：

摘要：

To provide guides for exploration of porphyry copper mineralization at a district scale, we examine the spatial association between known porphyry copper deposits and geologic features in Benguet, Philippines. The spatial associations between the porphyry copper deposits and strike-slip fault discontinuities, batholithic pluton margins and porphyry plutons are quantified using weights of evidence modeling. In the training and testing district, the porphyry copper occurrences are associated spatially with strike-slip fault discontinuities, batholithic pluton margins and contacts of porphyry plutons within distances of 3 km, 2.25 km, and 1 km, respectively. In addition, the porphyry plutons are associated spatially with strike-slip fault discontinuities and contacts of batholithic plutons within a distance of 2.25 km and 3 km, respectively. Based on these significant spatial associations, predictive maps are generated to delineate zones favorable for porphyry copper mineralization and zones favorable for emplacement of porphyry plutons in Benguet province, Philippines. Validations of the predictive models demonstrate their efficacy in pointing to zones for subsequent follow-up exploration work. © 2002 International Association for Mathematical Geology.

引用

页码：45 / 59

页数：14

共 19 条

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