| Braxton, D. P., Cooke, D. R., Ignacio, A. M., Rye, R. O., Waters, P. J. (2009) Ultra-Deep Oxidation and Exotic Copper Formation at the Late Pliocene Boyongan and Bayugo Porphyry Copper-Gold Deposits, Surigao, Philippines: Geology, Mineralogy, Paleoaltimetry, and their Implications for Geologic, Physiographic, and Tectonic Controls. Economic Geology, 104 (3) 333-349 doi:10.2113/gsecongeo.104.3.333 | Journal (article/letter/editorial) | Pliocene Boyongan and Bayugo Porphyry Copper-Gold Deposits, Surigao, Philippines: Geology, Mineralogy...American Exploration (Philippines) Inc. 21 Outlook Drive Baguio City, Philippines 2600 Abstract The Boyongan...Boyongan and Bayugo porphyry copper-gold deposits are part of an emerging belt of intrusion-centered gold-rich...gold-rich deposits in the Surigao district of northeast Mindanao, Philippines. Exhumation and weathering...modest (30–70 m) oxidation profile at adjacent Bayugo. Debris flows, volcanic rocks, and fluviolacustrine | | | Journal (article/letter/editorial) | Environment: A Case Study of the Bayugo Porphyry Copper-Gold Deposit, Southern Philippines DAVID BRAXTON1,†,* AND...the supergene profile of the Bayugo porphyry copper-gold deposit (Philippines) show significant isotopic... In contrast, samples of supergene sulfides (chalcocite and djurleite) collected from the exotic and...have shown that the copper isotope ratios in the chalcocite and the leached cap iron oxides relate to the...hydrogeologic regime and ultimately begins to deposit copper as the controls of solubility (redox, pH | | | Journal (article/letter/editorial) | Boyongan and Bayugo Porphyry Cu-Au Deposits: An Emerging Porphyry District in Northeast Mindanao, Philippines*...American Exploration (Philippines) Inc., 21 Outlook Drive, Baguio City 2600, Philippines Abstract The Boyongan...Boyongan and Bayugo porphyry Cu-Au mineral deposits, discovered under postmineralization cover during the...deposits and prospects in the Surigao district of northeast Mindanao, Philippines. Since their formation in...Boyongan and a modest (30–70 m) oxidation profile at Bayugo. Debris flows, volcanic material, and fluviolacustrine |
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