Ore and Alteration Types of the Gold and Copper Mineralization in the Lascogon Project, Surigao del Norte, Mindanao Island, Philippines

Autor: Jeddalyn Parian, Jessie Segura, Jonelle Nikolai Crisostomo, Daizo Ishiyama, Redempta P. Baluda, Maureen Laroco, Jocelyn B. Galapon, Gerry Comia, Noel C. Oliveros, Sonia Eguia, Victor B. Maglambayan
Rok vydání: 2007
Předmět:
Zdroj: Resource Geology. 57:241-247
ISSN: 1751-3928
1344-1698
DOI: 10.1111/j.1751-3928.2007.00020.x
Popis: Two ore and three alteration types were identified in the Lascogon Project of Philex Gold Philippines, in Surigao del Norte, Mindanao Island, Philippines. The jasperoid ore is the host to the Carlin-like gold mineralization in the Lascogon and Danao prospects. The ore occurs in a decalcified and silicified horizon, with minor chlorite and goethite, stibnite, pyrite and quartz crystals ranging from cryptocrystalline to botryoidal. The stringer–stockwork type Cu-Au mineralization in the Suyoc prospect is hosted in argillized andesitic rocks of the Mabuhay Formation. The primary ore minerals are chalcopyrite with minor amounts of sphalerite. The alteration types identified are propylitic alteration, argillic alteration and silicification. The propylitized basaltic and andesitic flows of the Bacuag Formation bound the jasperoid mineralization in the Lascogon prospect. Stratigraphically, the relationship between propylitized basalts and stringer–stockwork Cu-Au is not clear but a lateral change can be inferred from jasperoid in the center and stringer–stockwork towards the east.
Databáze: OpenAIRE
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