 | 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) | | Bayugo Porphyry Copper-Gold Deposits, Surigao, Philippines: Geology, Mineralogy, Paleoaltimetry, and their...American Exploration (Philippines) Inc. 21 Outlook Drive Baguio City, Philippines 2600 Abstract The Boyongan...the Surigao district of northeast Mindanao, Philippines. Exhumation and weathering of these Late Pliocene-age...–5.7 per mil. At the latitude of the southern Philippines, this value corresponds to Pleistocene rain water...Table 1). The Boyongan porphyry Cu-Au deposit, Philippines, is a significant exception to this pattern. |  | | Report (issue) | | Clark and others, 2007). In the thermal infrared region, quartz and hydrous silica contain emission minima...might include malachite + azurite + cuprite + chrysocolla, with minor amounts of other minerals (for example...the magma is largely inherited from the source region (Carmichael, 1991). Other parameters, such as magma...and so forth) are also inherited from the source region. The compositional features and degree of magma...are assigned to the last intrusive event in the region (for example, host dacites evolving from cogenetic |  | | Book | | Arqueo/6gicas y Museo. Unii·ersidad Cat6lica de! Norte, San Pedro Alacama. Chile V. Oliveros Departamento de...limestones. The central depression (zone 2), or Central Valley, is a c.Jownwarp with a Mesozoic to Quaternary...several major cities. In southern Chile the centrai valley is not recognized and the transition between the...so-called ·fiat slab' zone). where the Central Valley is also absent. The northern volcanoes a re builL...nitrates from the evaporitic deposits of the Atacama region was paramount). Because of its economic in1portance |
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