Geochemical Characteristics of Intrusive Rocks, Southeastern Mindanao, Philippines: Implication to Metallogenesis of Porphyry Copper-gold Deposits

Autor:	Sho Nishihara, Akira Imai, Leilanie O. Suerte
Rok vydání:	2009
Předmět:	Mineralization (geology) Geochemistry Geology engineering.material Silicate Porphyry copper deposit Diorite chemistry.chemical_compound chemistry Geochemistry and Petrology engineering Phenocryst Mafic Petrology Quartz Hornblende
Zdroj:	Resource Geology. 59:244-262
ISSN:	1751-3928 1344-1698
DOI:	10.1111/j.1751-3928.2009.00094.x
Popis:	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 XMg of mafic silicate phenocrysts and SO3 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.
Databáze:	OpenAIRE
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