| | Journal (article/letter/editorial) | Emerging Porphyry District in Northeast Mindanao, Philippines* David P. Braxton,1,2,†,** David R. Cooke,1,3...American Exploration (Philippines) Inc., 21 Outlook Drive, Baguio City 2600, Philippines Abstract The Boyongan...the Surigao district of northeast Mindanao, Philippines. Since their formation in the early Pleistocene... Introduction Located in the northeast of the island of Mindanao, Boyongan and Bayugo are two Cu-Au...historic Surigao Au district of the southern Philippines (Fig. 1). Recent mineral resource estimates for |
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