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volcanic arc |
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Such basins are generally nestled behind volcanic arcs, on the overriding plate of a subduction zone. The license area contains arc-magmatic rocks of Tertiary age, largely consisting of grano-dioritic intrusives and related porphyric andesites, typical of volcanic arc environments, where epithermal gold-silver mineralization can be expected. It is located in the active Halmahera volcanic arc and the mineralization is hosted by a potassic altered and magnetite bearing tonalite porphyry stock. |
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