 | 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. |  | | 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...historic Surigao Au district of the southern Philippines (Fig. 1). Recent mineral resource estimates for...systems in mind, Anglo American Exploration (Philippines) Inc. (Anglo American) targeted the Surigao Au |  | | Book (edition) | | • t --•- """"" ' The Lornex copper-molybdenum mine and plant, Highland Valley, British Columbia. (By...measurements have been retained in specific cases such as mine levels when measured in feet, values of gold and...developing an annual ton of new copper capacity from mine through the refinery without intrastructure costs...fold in three years. As an example, the " Surface Mine Control and Reclamation Act,' ' which was initially...resources in the future.'' In 1977, a surface coal mine regulation that greatly restricts the areas of strip |  | | Journal (issue) | | Utilisation of Virginia Tobacco Seed in the Madras Province. By R. 1942, 12, 400-408. Swami Rao and M. Naraslmbam...Progress Report on Forest Administration in the Province of Bihar for the year 1939-40. By L. R. Sabharwal...Progress Report on Forest Administration in the Province of Orissa for 1940-4 1 . Pp. 82, 10 x 7. (Cuttack...use of workers on collective farms in the Moscow region . 1 OTHER INSECTICIDE MATERIALS OF VEGETABLE ORIGIN...together with the Broken Hill lead-zinc-vanadium mine make the country the leading base metal producer |  | | Journal (issue) | | 271. ‘ 2 Min.-34 ; ENGINEERING WORKS, 4034 Mine & Smelter Supply Co. Denver 17, Colo. 8 a oO ...Mining Con pany, Limited’s, Bomi Hills iron ore mine over th newly constructed railroad from Monrovia...recoveries. Molybdenum will also be recovered from mine dumps at the Bleiberg Bergwersunion lead-zinc mines...members would look into the returns per ton to a mine with 1 percent ore under this $63 program, they...concentrates means about $18 gross for 1 percent mine rock. Even years ago the Metals Reserve Company |  | | Report (issue) | | holdings. Prior to 1978, the development of complete mine property cost evaluations was impeded by still evolving...tool. Systems design work also continued on the mine simulation (MINSIM) program, an economic evaluation...reserves. These include implications that because a mine is operating it is profitable, that reported reserves...prices, which are variable over the life of the mine. Economic evaluation is complicated by the presence...and economic variables on viability of individual mine properties (17-18). Nonproducing deposits Producing |
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