 | | Journal (article/letter/editorial) | | Hydrothermal System at the Dizon Porphyry Cu-Au Deposit, Zambales, Philippines Akira IMAI* Department of...system at the Dizon porphyry Cu-Au deposit in western central Luzon, Zambales, Philippines, is documented...veinlets with chalcopyrite and pyrite associated with Au and chalcopyrite and pyrite stringers in sericite alteration...hydrothermal system. Keywords: Dizon, porphyry Cu deposit, Philippines, Luzon, fluid inclusion, hydrothermal...1986; Sillitoe and Gappe, 1984; Imai, 2002). The Dizon porphyry Cu-Au deposit has been considered as a |  | | Journal (article/letter/editorial) | | to porphyry Cu-Au mineralization at the Dizon mine, Philippines William P. Midea1 | Keiko Hattori1 |...Sciences, University of the Philippines Diliman, Quezon City, Philippines Correspondence William P. Midea...Engineering Research Council of Canada Abstract The Dizon Au-rich porphyry Cu deposit, 0.67 Mt Cu and 174...of plagioclase phenocrysts. Parental magmas at Dizon were oxidized, above FMQ + 2.0, and water-rich,...opacitic bands of amphibole in the diorite porphyry at Dizon reflects the release of aqueous fluids from the |  | | Journal (article/letter/editorial) | | of Porphyry Cu Deposits of the Western Luzon Arc, Philippines: K-Ar ages, SO3 Contents of Microphenocrystic...the following porphyry Cu deposits in the western Luzon arc are determined: Lobo-Boneng (10.5±0.4 Ma), Santo...Niño (9.5±0.3 Ma), Black Mountain (2.1±0.1 Ma), Dizon (2.5±0.2 Ma) and Taysan (7.3±0.2 Ma). Microphenocrystic...associated with porphyry Cu deposits in the western Luzon arc contains sulfur as SO3 detectable by electron...magmatism of the western Luzon arc, from tonalitic rocks of the Luzon Central Cordillera of about 15 Ma |  | | Journal (article/letter/editorial) | | GeosciencesBureau, North Avenue, Diliman,Quezon City, Philippines Abstract--The mining industry sector is a major...the framework of very stiff competition in the region for investments, new thrusts and directions, without...mining ensued and fostered the development of a mine in Panay Island in 1842, and another (now the Lepanto...dredging operations by the British in the Bicol region and eastern Mindanao. Modern methods of mining...kilos from the first modern gold mine (Benguet Corp.'s Antamok Mine) in 1907 to more than 30,000 kilos |  | Payot, Betchaida D., Maglambayan, Victor B., Dimalanta, Carla B., Yumul, Graciano P., Tamayo, Rodolfo A., Matsuda, Toshihiko, Suzuki, Shigeyuki, Bellon, Herve (2005) Geology and Hydrothermal Alteration of the Low Sulfidation. Resource Geology, 55 (3) 155-162 doi:10.1111/j.1751-3928.2005.tb00238.x | Journal (article/letter/editorial) | | Pantingan Gold System, Mount Mariveles, Bataan (Luzon), Philippines Betchaida D. PAYOT, Victor B. MAGLAMBAYAN...Science, University of the Philippines, Diliman, Quezon City, Philippines 1101 [e-mail: rwg@i-next.net...and Technology, Bicutan, Taguig, Metro Manila, Philippines ** Department of Earth Sciences, Faculty of Science...caldera of Mount Mariveles, Bagac, Bataan (Luzon), Philippines. It consists of nine major veins, eight of...crystalline and chalcedonic quartz and amorphous silica. Pyrite is the most ubiquitous sulfide mineral. It occurs |  | | Book (volume) | | Book Vol. 6 MINERAL DEPOSITS OF JAPAN AND THE PHILIPPINES r QE 304 . A14 1992 v.6 The Society of Resource...Book Vol. 6 MINERAL DEPOSITS OF JAPAN AND THE PHILIPPINES The Society of Resource Geology Nogizaka building...Volume 6 : Mineral Deposits of Japan and the Philippines Editors: Tetsuro Urabe and Masahiro Aoki The...Honshu 4. Mineral Deposits of Japan and the Philippines (* in Japanese) Nos. 1 - 3 are published as Guidebook...Volume 6: Mineral Deposits of Japan and the Philippines. The publications of these volumes are supported |  | | Journal (article/letter/editorial) | | Southeast Porphyry Cu-Au Deposit, Mankayan, Philippines Akira IMAI Abstract: The Lepanto Far Southeast...enargiteluzonite Cu-Au deposit in Mankayan, Benguet Province, Philippines. The principal orebody consists of potassic...quartz-anhydrite stockworks are chalcopyrite and pyrite with minor bornite and Bi-Te-bearing tennantite...tennantite, with trace of native gold. Rounded pyrite grains appear fractured and corroded and are interpreted...remnants of primary intermediate solid solution + pyrite assemblage. A breccia pipe truncates the deposit |  | | Journal (article/letter/editorial) | | Copper-gold Deposit, Southeastern Mindanao, Philippines Akira Imai,1 Leilanie Osano Suerte1,2 and Sho...Geosciences Bureau Region IV, Department of Environment and Natural Resources, Iloilo, Philippines Abstract At... Compostela Valley, south-eastern Mindanao, Philippines, bornite pods occur in the brecciated parts in...porphyry. Keywords: bornite, Kingking, Mindanao, Philippines, porphyry copper deposit. 1. Introduction The...south-eastern portion of Mindanao Island, the Philippines. It has a total mineable ore reserve of 353 million |  | | Journal (article/letter/editorial) | | veinlets, and late ‘D’ veinlets consisting of massive pyrite and quartz (Clode et al., 1999). Copper and gold...located in southwestern part of Sumbawa Island, Province of Nusa Tenggara Barat, Indonesia, in Sunda-Banda...world including western Pacific rim such as the Philippines (e.g., Sillitoe 239 240 A. IMAI and S. OHNO...in Figures 3 and 4, respectively (courtesy of the mine). Since the old tonalite is too small with respect...surface is original topography (courtesy of the mine). Since the old tonalite is too small with respect |  | | Journal (article/letter/editorial) | | mineralization: evidence from Mount Pinatubo, Philippines, and Bingham Canyon, Utah, USA Received: 15 April...Springer-Verlag 2001 Abstract Mount Pinatubo in the Philippines, known for its cataclysmic eruption in 1991,...signi®cant anhydrite, and much larger quantities as pyrite in alteration halos; the deposits are ®rst and...porphyry copper systems, including that at the Dizon deposit on the ¯ank of the volcano. Close monitoring...located in the Bataan arc in western Luzon Island, Philippines (Fig. 1a). This arc contains several young |  | | Journal (article/letter/editorial) | | Stratovolcanoes or compositeconesare constructed during central vent eruptionsof tephra and suborwestern Americas... 1973), Namosi, Fiji (Rodda,1976), andDizon,Philippines,areall related to dioriteor quartzdioriteporphyrystocksemplaced...Fig. 1) and may be observedin that position at Dizon (R. H. SillitoeandI. M. Gappe,Jr., unpub.rept.,...mineralizedstratovolcanoes may be rec- m are characterizedby pyrite-rict•advancedargillic ognizedby their distalapronsof...quaquaversally dip- alterationassemblages, as at Tongonan,Philippines ping volcanicand volcaniclastic rocks,includingim- |  | | Journal (article/letter/editorial) | | northeast and Myanmar in the northwest, through the Philippines, Indonesia, New Guinea, and the volcanic island...over the past decade (e.g., BoyonganBayugo, Philippines; Golpu porphyry, Papua New Guinea) or are close...several centuries. In the Philippines, despite a long history of mining in the region (Cooke et al., 2011)...pdf by Boston College user 2 HOLLINGS ET AL. Luzon South China Sea Gulf of Thailand Sulu Sea 2...1200 800 400 Lutopan Kingking Boyongun Kelian Dizon Wafi Namosi Elang Wabu Tampakan Emperor Santo |  | Cirineo, Avriel Venis L., Imai, Akira, Takahashi, Ryohei, Baluda, Redempta P., Oliveros, Noel C., Maglambayan, Victor B., Luis, Roy Ronald C., Faustino, Maria Lourdes M., Almadin, Jacky (2021) Overprinting
porphyry‐type
veinlets on the intrusive rocks and phreatomagmatic breccias in the Southwest prospect, southwestern Sto. Tomas
II
(Philex), Baguio District, Philippines. Resource Geology, 71 (1). 1-40 doi:10.1111/rge.12242 | Journal (article/letter/editorial) | | southwestern Sto. Tomas II (Philex), Baguio District, Philippines Avriel Venis L. Cirineo1 | Akira Imai2 | Ryohei...Division, Philex Mining Corporation, Mandaluyong, Philippines Correspondence Avriel Venis L. Cirineo, Graduate...deposit in the Baguio District, northwestern Luzon, Philippines. The Southwest prospect hosts a copper-gold...Indonesia (Davies et al., 2008) and Acupan, Philippines (Cooke and Bloom, 1990; Cooke et al., 1996);...porphyry copper–gold mineralization in Boyongan, Philippines (Braxton et al., 2009; 2018; Braxton and Mathur |  | | 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...of massive bornite-chalcopyrite and chalcopyrite-pyrite with K-feldspar halos. Stage 3 quartz veins and...pervasive illite alteration, in association with pyrite, chalcopyrite, and tetrahedrite-tennantite, developed |  | | Journal (article/letter/editorial) | | Porphyry copper deposits account for 60% of the world's mine production of copper and constitute 80% of ore reserves...Bering (pers. commun., 1980), Bering (1984) Philippines 9. Dizon Silltoe and Gappe (1984); Malihan (1987)...Schwartz, 1984), Tangse (van Leeuwen et al., 1987) Philippines: Marcopper (Loudon, 1976),2 Santo Nino (Bryner...1982), San Manuel-Kalamazoo (Titley and Hicks, 1966; Lowell and Guilbert, 1970; Kesler, 1973) ,2 San Xavier...Typical horizontal alteration patterns show a central potassic zone that passes outward into sericitic |  | Imai, Akira, Shinomiya, Jumpei, Soe, Maung Thiha, Setijadji, Lucas Donny, Watanabe, Koichiro, Warmada, I Wayan (2007) Porphyry-Type Mineralization at Selogiri Area, Wonogiri Regency, Central Java, Indonesia. Resource Geology, 57 (2) 230-240 doi:10.1111/j.1751-3928.2007.00019.x | Journal (article/letter/editorial) | | Mineralization at Selogiri Area, Wonogiri Regency, Central Java, Indonesia Akira Imai1, Jumpei Shinomiya1...The Selogiri area, situated in Wonogiri regency, Central Java, is one of several gold prospecting areas...The Selogiri area, situated in Wonogiri regency, Central Java, is one of several gold prospects in the Southern...Range in Central Java. The Southern Mountain Range is situated in the present-day fore-arc region between...Fig. 2 Physiographic map of the geologic province of central and eastern Java, Indonesia, as well as distribution |  | Frias, Sofia Marah P., Imai, Akira, Takahashi, Ryohei, Balangue‐Tarriela, Ma. Ines Rosana, Arcilla, Carlo, Blamey, Nigel (2019) Geology, Alteration, and Mineralization of the Kay Tanda Epithermal Gold Deposit, Lobo, Batangas, Philippines. Resource Geology, 69 (4) 351-384 doi:10.1111/rge.12205 | Journal (article/letter/editorial) | | Tanda Epithermal Gold Deposit, Lobo, Batangas, Philippines Sofia Marah P. FRIAS,1 Akira IMAI,2 Ryohei TAKAHASHI...Institute of Geological Sciences, University of the Philippines Diliman, 4Philippine Nuclear Research Institute...Department of Science and Technology, Quezon City, Philippines and 5Department of Earth Sciences, Western University...the Batangas Mineral District in southern Luzon, Philippines. This study aims to document the geological... 1. Introduction Epithermal deposits in the Philippines are primarily related to magmatic–hydrothermal |  | 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...Boyongan. This thick vadose zone and the low hypogene pyrite/copper sulfide ratios (0.6) at Boyongan promoted |  | Polve, Mireille, Maury, Rene C., Jego, Sebastien, Bellon, Herve, Margoum, Ahmed, Yumul, Graciano P., Payot, Betchaida D., Tamayo, Rodolfo A., Cotten, Joseph (2007) Temporal Geochemical Evolution of Neogene Magmatism in the Baguio Gold?Copper Mining District (Northern Luzon, Philippines) Resource Geology, 57 (2) 197-218 doi:10.1111/j.1751-3928.2007.00017.x | Journal (article/letter/editorial) | | Baguio Gold–Copper Mining District (Northern Luzon, Philippines) Mireille Polve1, Rene C. Maury2, Sebastien...Institute of Geological Sciences, University of the Philippines, Quezon City and 5Philippine Council for Industry...Development-DOST, Taguig, Philippines Abstract Baguio, in the Central Cordillera of Northern Luzon, is a district...thought to reflect the progressive addition to the Luzon arc mantle wedge of incompatible elements largely...consequence of the docking of the Zambales ophiolitic terrane to Northern Luzon. Then, magmatic activity resumed |  | | Journal (article/letter/editorial) | | Hg deposits including Itomuka and Ryushoden in central Hokkaido and Hg and Sb mineralizations in Northeast...values of cinnabar from the Hidaka-Kitami district, central Hokkaido, including the Itomuka and Ryushoden deposits...(Yakumo, Toyotomi and Teine deposits) and eastern-central Honshu (Hachiman and Daikoku deposits). The variation...than +2 ‰ from southwestern Hokkaido, eastern-central Honshu and Kyushu are probably caused by contribution...values of cinnabar from the Hidaka-Kitami district, central Hokkaido, is difficult to explain at this moment |  | Deng, Jianghong, Yang, Xiaoyong, Zhang, Li-peng, Duan, Liuan, Mastoi, Abdul Shakoor, Liu, He (2020) An overview on the origin of adakites/adakitic rocks and related porphyry Cu-Au mineralization, Northern Luzon, Philippines. Ore Geology Reviews, 124. 103610pp. doi:10.1016/j.oregeorev.2020.103610 | Journal (article/letter/editorial) | | related porphyry CuAu mineralization, Northern Luzon, Philippines Jianghong Deng, Xiaoyong Yang, Li-peng Zhang...related porphyry Cu-Au mineralization, Northern Luzon, Philippines, Ore Geology Reviews (2020), doi: https://doi...related porphyry Cu-Au mineralization, Northern Luzon, Philippines Jianghong Deng1-4, Xiaoyong Yang4*, Li-peng...rocks. Northern 4 Luzon is one of the most Cu-Au enriched areas in the Philippines, which develops Late-...porphyry and epithermal Cu-Au deposits in the Central 6 Cordillera Range and southernmost of Cagayan |  | | Journal (article/letter/editorial) | | sediment-hostedmassivesulfidelead-zincde- recorded. The San Antonio de La Huerta pipe in posits, unconformity-typeuranium...porphyry- are not commonlyobserved.Locally, as in the San type mineralization,CopperCreek (Grimour,1977) Pedro...150 >600 Angularto sub- Absent rounded Peru San Pedro de 10 to >50% rounded Granodiorite Paleocene...Angularto locally Absent rounded El Bolsico, Chile San Francisco de Los Andes, Argentina Quartz diorite...Principalgangue Sericitic, chloritic, argillic Pyrite, chalcopyrite, pyrrhotite,magnetite, molybdenite |  | Imai, Akira, Ohbuchi, Yukiko, Tanaka, Takayuki, Morita, Seiya, Yasunaga, Kentaro (2007) Characteristics of Porphyry Cu Mineralization at Waisoi (Namosi District), Viti Levu, Fiji. Resource Geology, 57 (4) 374-385 doi:10.1111/j.1751-3928.2007.00031.x | Journal (article/letter/editorial) | | deposit is characterized by the bornite–chalcopyrite–pyrite assemblage associated with traces of molybdenite...deposit is characterized by the bornite–chalcopyrite–pyrite assemblage accompanied with sheeted and stockwork...Waisoi West deposits, primary bornite–chalcopyrite–pyrite assemblage in the high Cu-grade zone was deposited...Drummond, 1990). 3.2. Waisoi East deposit The central part of the Waisoi East deposit is situated in...disseminations of bornite and chalcopyrite accompanied with pyrite. The basaltic lapilli tuff of the Wainimala Group |  | | Journal (article/letter/editorial) | | depth in SBD257 have abundant magnetite and pyrite. Pyrite in quartz veins at depth in SBD257 mainly occur...in magnetite grains in quartz veins in SBD254. Pyrite which often occurs in low grade zone in quartz...the rims of copper sulfides. This indicates that pyrite in SBD257 and SBD254 formed later than magnetite...sulfides and magnetite were replaced or dissolved and pyrite was formed, resulting the low grade zone at the...style has been identified in the Selogiri area (Central Java) (Imai et al., 2007b). Meanwhile, there are |  | Reich, Martin, Parada, Miguel A., Palacios, Carlos, Dietrich, Andreas, Schultz, Frank, Lehmann, Bernd (2003) Adakite-like signature of Late Miocene intrusions at the Los Pelambres giant porphyry copper deposit in the Andes of central Chile: metallogenic implications. Mineralium Deposita, 38 (7) 876-885 doi:10.1007/s00126-003-0369-9 | Journal (article/letter/editorial) | | giant porphyry copper deposit in the Andes of central Chile: metallogenic implications Received: 12 November...the Los Pelambres giant porphyry copper deposit, central Chile (32S). Located within the southern portion...Keywords Adakites Æ Giant porphyry copper deposits Æ Central Andes Introduction The genetic link between magmatism...crust (Cathles 1981; Sawkins 1990). The Andes of central Chile host some of the world’s largest porphyry...black line), and the volcanic gap separating the Central Volcanic Zone (CVZ) and the Southern Volcanic Zone |
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