Geochemical characteristics of intrusive rocks, Southeastern Mindanao, Philippines: Implication to metallogenesis of porphyry copper-gold deposits

Leilanie Osano Suerte, Akira Imai, Sho Nishihara

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10 Citations (Scopus)

Abstract

This paper describes petrologic and geochemical characteristics of intrusive rocks associated with porphyry copper deposits in south-eastern Mindanao, the Philippines, where the Kingking deposit is located. Intrusive rocks at the Kingking deposit, are classified into biotite-bearing diorite porphyry, hornblende diorite porphyry and diorite porphyry. Intrusive rocks in other areas in south-eastern Mindanao, including Batoto, Bukal, Maragusan, Masara, Amacan and Sumlog, are hornblende diorite porphyry and hornblende quartz diorite. They are adakitic in Sr/Y-Y diagram, but not in La/Yb-Yb diagram due to relatively low REE contents. The magmas are oxidizing as suggested by the high X Mg of mafic silicate phenocrysts and SO 3 contents of microphenocrystic apatite. An Oligocene-Miocene diorite intrusive complex formed by calc-alkaline, hydrous, oxidizing magma is considered to be associated with porphyry-type copper-gold mineralization.

Original languageEnglish
Pages (from-to)244-262
Number of pages19
JournalResource Geology
Volume59
Issue number3
DOIs
Publication statusPublished - Sep 1 2009

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All Science Journal Classification (ASJC) codes

  • Geology
  • Geochemistry and Petrology

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