 | | Journal (article/letter/editorial) | | porphyry Cu-Au mineralization at the Dizon mine, Philippines William P. Midea1 | Keiko Hattori1 | Gabriel...Sciences, University of the Philippines Diliman, Quezon City, Philippines Correspondence William P. Midea...magmas, including destabilization texture of plagioclase phenocrysts. Parental magmas at Dizon were oxidized...geothermobarometry, Fe-Ti oxide geothermobarometry, Luzon arc, magma oxidation, magmatic hydrothermal activity...Au-rich porphyry Cu deposit in the Luzon arc, Philippines. The Luzon arc hosts many young, <10 Ma, porphyry |  | | Journal (article/letter/editorial) | | Oxidized sulfur-rich mafic magma at Mount Pinatubo, Philippines Received: 16 January 2003 / Accepted:...early stages of the 1991 eruption of Mount Pinatubo, Philippines, contain amphiboles that crystallized...releasing sulfur from the melt are not applicable to Pinatubo. Instead, the oxidized state of the dacitic magma...reflects that of parental mafic magma and the source region in the sub-arc mantle. Our results fit a model in...disproportionate sulfur output during the 1991 Mt. Pinatubo eruption suggests that oxidized mafic melt is an |  | Yoshikawa, Masako, Tamura, Akihiro, Arai, Shoji, Kawamoto, Tatsuhiko, Payot, Betchaida D., Rivera, Danikko John, Bariso, Ericson B., Mirabueno, Ma. Hannah T., Okuno, Mitsuru, Kobayashi, Tetsuo (2016) Aqueous fluids and sedimentary melts as agents for mantle wedge metasomatism, as inferred from peridotite xenoliths at Pinatubo and Iraya volcanoes, Luzon arc, Philippines. Lithos, 262. 355-368 doi:10.1016/j.lithos.2016.07.008 | Journal (article/letter/editorial) | | peridotite xenoliths at Pinatubo and Iraya volcanoes, Luzon arc, Philippines Masako Yoshikawa, Akihiro...peridotite xenoliths at Pinatubo and Iraya volcanoes, Luzon arc, Philippines, LITHOS (2016), doi: 10...R Philippines IP as inferred from peridotite xenoliths at Pinatubo and Iraya volcanoes, Luzon arc...Volcanology and Seismology (PHIVOLCS), Quezon City, Philippines d Faculty of Science, Fukuoka University, Fukuoka...Sciences, University of the Philippines, Diliman, Quezon City 1101, Philippines Christchurch City Council |  | Payot, Betchaida, Arai, Shoji, Yoshikawa, Masako, Tamura, Akihiro, Okuno, Mitsuru, Rivera, Danikko (2018) Mantle Evolution from Ocean to Arc: The Record in Spinel Peridotite Xenoliths in Mt. Pinatubo, Philippines. Minerals, 8 (11) 515 doi:10.3390/min8110515 | Journal (article/letter/editorial) | | Record in Spinel Peridotite Xenoliths in Mt. Pinatubo, Philippines Betchaida D. Payot 1, *, Shoji Arai 2 ,...Sciences, University of the Philippines, Diliman, Quezon City 1101, Philippines Department of Earth Sciences...Volcanology and Seismology, Diliman, Quezon City 1101, Philippines; danikkorivera@gmail.com Correspondence: bdpayot@up...flow deposits located close to the summit of Mt. Pinatubo. Spinel harzburgite is the most dominant lithology...mantle wedge. Keywords: xenoliths; Mt. Pinatubo; Philippines; mantle wedge; abyssal lherzolite; arc harzburgite |  | Jego, Sebastien, Maury, René C., Polvé, Mireille, Yumul, Graciano P., Bellon, Herve, Tamayo, Rodolfo A., Cotten, Joseph (2005) Geochemistry of Adakites from the Philippines: Constraints on Their Origins. Resource Geology, 55 (3) 163-188 doi:10.1111/j.1751-3928.2005.tb00239.x | Journal (article/letter/editorial) | | 163–187, 2005 Geochemistry of Adakites from the Philippines: Constraints on Their Origins Sebastien JEGO...Sciences, University of the Philippines, Diliman, 1101 Quezon City, Philippines **** Philippine Council for...Development-DOST, Gen. Santos Avenue, Bicutan, 1631 Taguig, Philippines Received on April 1, 2005; accepted on July 12...along the Manila Trench (Batan, Northern Luzon, Central Luzon), the Negros and Sulu Trenches (Negros and...Philippine Trench (Eastern Mindanao). Lavas from Central Mindanao overlie the deep remnants of the Molucca |  | | Journal (article/letter/editorial) | | copper mineralization: evidence from Mount Pinatubo, Philippines, and Bingham Canyon, Utah, USA Received:...2001 Ó Springer-Verlag 2001 Abstract Mount Pinatubo in the Philippines, known for its cataclysmic eruption...isotope values of 0& for large deposits. Mount Pinatubo is famous for the cataclysmic eruption of June...melt Pinatubo Mount Pinatubo is located in the Bataan arc in western Luzon Island, Philippines (Fig....Southeast and Santo Tomas II mines (Fig. 1a). Mount Pinatubo itself hosts several porphyry copper±gold deposits |  | | Journal (article/letter/editorial) | | Southeast Porphyry Cu-Au Deposit, Mankayan, Philippines Akira IMAI Abstract: The Lepanto Far Southeast...Cu-Au deposit in Mankayan, Benguet Province, Philippines. The principal orebody consists of potassic alteration...heterogeneous entrapping in the two-fluid unmixing region. Sulfur isotopes of aqueous sulfide and sulfate...associated magmatic hydrothermal deposits in the western Luzon arc. The Lepanto Far Southeast (FSE) porphyry Cu-Au...Mineral District, Benguet Province, northern Luzon, Philippines (e.g., Gonzalez, 1956; Garcia, 1991). A set |  | | Journal (article/letter/editorial) | | and one calc-alkaline composition) from the Philippines. The experiments were performed over a fO2 range...and epithermal and porphyry-type deposits is the central question addressed in this paper. We approach the... (2005; see below), all from the North Luzon arc, Philippines (Fig. 1a; bulk rock compositions in Table...Table 1). Recent (<20 Ma) magmatism in the North Luzon arc is linked to the current subduction of the South...rocks selected all come from this recent North Luzon magmatism. They have ages < 3 Ma (Table 1). Diorite |  | Jakubowski, Ryan T., Fournelle, John, Welch, Sue, Swope, R. J., Camus, Patrick (2002) Evidence for magmatic vapor deposition of anhydrite prior to the 1991 climactic eruption of Mount Pinatubo, Philippines. American Mineralogist, 87 (8) 1029-1045 doi:10.2138/am-2002-8-901 | Journal (article/letter/editorial) | | prior to the 1991 climactic eruption of Mount Pinatubo, Philippines RYAN T. JAKUBOWSKI,1,* JOHN FOURNELLE...ABSTRACT Anhydrite (CaSO4) phenocrysts from Mount Pinatubo pumices show evidence of having responded dynamically...the magma at depth. At least a portion of the Pinatubo anhydrite phenocrysts provided substrates for...such as Nevado del Ruiz (Fournelle 1990) and Mount Pinatubo. It has been predicted experimentally that...1984). Mount Pinatubo pumice: chemistry and mineralogy Beginning in mid-March 1991, Mt. Pinatubo, a composite |  | | Report (chapter) | | site of the Bataan Nuclear Power Plant, the Philippines A. M. F. LAGMAY1*, R. RODOLFO1, H. CABRIA1, J...Science, University of the Philippines, Diliman, Quezon City 1101, the Philippines 2 Marine Science Institute...Science, University of the Philippines, Diliman, Quezon City 1101, the Philippines 3 Clermont Université...Development, University of the Philippines, Diliman, Quezon City 1101, the Philippines *Corresponding author (e-mail:...sector of Mount Natib, a potentially active volcano in the Bataan volcanic arc in western Luzon, is the |  | | Journal (article/letter/editorial) | | km3 of dacitic tephra at Pinatubo Volcano on the Philippine island of Luzon ( Scott et al., 1996; Wolff...Wolff and Hoblitt, 1996). Based on TOMS data, the Pinatubo SO2 cloud was estimated at 14 to 26 Mt (Krueger...temperature of 800 to 850°C. In the case of the 1991 Pinatubo dacites, conventional sulfur isotopic measurements...anhydrite and chalcopyrite crystals from the 1991 Pinatubo eruption by ion microprobe. For the andesitic...Mexican Volcanic Belt, the northwestern end of the Central American Volcanic Belt, and principal plate-tectonic |  | Borisova, Anastassia Yu., Pichavant, Michel, Polvé, Mireille, Wiedenbeck, Michael, Freydier, Remi, Candaudap, Frédéric (2006) Trace element geochemistry of the 1991 Mt. Pinatubo silicic melts, Philippines: Implications for ore-forming potential of adakitic magmatism. Geochimica et Cosmochimica Acta, 70 (14) 3702-3716 doi:10.1016/j.gca.2006.04.030 | Journal (article/letter/editorial) | | element geochemistry of the 1991 Mt. Pinatubo silicic melts, Philippines: Implications for ore-forming potential...2006 Abstract The dacite pumice erupted from Mt. Pinatubo on June 15, 1991 (whole-rock, rhyolitic groundmass...minimum of 100 t Au and 5 · 105 t Cu from the Mt. Pinatubo magma. Our data suggest that intrusives having...Cl, Sr/Y, Pb/Ce, Mo/Ce, As/Ce and Sb/Ce in Mt. Pinatubo melts reflect the contribution of deep fluids derived...et al., Trace element geochemistry of the Mt. Pinatubo silicic melts 1997; Mungall, 2002). Understanding |  | | Journal (article/letter/editorial) | | microphenocrysts within poikilitic hornblende, plagioclase, and sphene. Phase equilibria of coexisting silicates...understanding volatile enrichment mechanisms is central to understanding the driving forces of explosive...by the eruptions of El Chichón in 1982 and Mount Pinatubo in 1991. In both of these events, gases and...(Williams et al. 1990), or Mount Pinatubo (Westrich and Gerlach 1992). Mount Pinatubo injected an estimated...systems such as El Chichón, Nevado del Ruiz, and Mount Pinatubo. GEOLOGY OF GRANITIC ROCKS IN THE CAJON PASS |  | de Ignacio, Cristina, Castiñeiras, Pedro, Márquez, Álvaro, Oyarzun, Roberto, Lillo, Javier, López, Iván (2003) El Chichón Volcano (Chiapas Volcanic Belt, Mexico) Transitional Calc-Alkaline to Adakitic-Like Magmatism: Petrologic and Tectonic Implications. International Geology Review, 45 (11) 1020-1028 doi:10.2747/0020-6814.45.11.1020 | Journal (article/letter/editorial) | | much resembling adakitic magmas (e.g., the 1991 Pinatubo eruption). We propose that these rocks were generated... 1987; Fig. 1A). In contrast with the typical Central America volcanic arc, the Chiapas volcanic belt...0020-6814/03/700/1020-9 $25.00 canic belt from the westernmost Central American volcanoes and from the Mexican volcanic...the atmosphere (compared with 20 Mt of SO2 by Mount Pinatubo in 1991; Pasteris, 1996). Another remarkable...setting of volcanic belts in southern Mexico and Central America. See location of the Chiapas volcanic belt |  | 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 |  | | Journal (article/letter/editorial) | | lowvariance mineral assemblage of amphibole, plagioclase (An30 – 50), quartz, biotite, sphene, magnetite...replaced by either quartz or calcite. Hornblende – plagioclase thermobarometry suggests that several magmas...by Jones et al. (1967). Igneous activity in the region began in the Late Cretaceous with the intrusion...dark-green and contain phenocrysts of white plagioclase (f 20 vol.%), amphibole (f 5 vol.%), biotite...determined the anorthite content of unaltered plagioclase phenocrysts in several quartz-monzodior- 150 |  | | Journal (article/letter/editorial) | | 381–411 1999 The 15 June 1991 Eruption of Mount Pinatubo. I. Phase Equilibria and Pre-eruption P–T–f...ejected during the 15 June 1991 eruption of Mt Pinatubo, to define the pre-eruption conditions of this...abundances and the compositions of hornblende, plagioclase, and melt indicate that the eruption tapped a...greater than NNO + 1·5. Compositional zoning of plagioclase reflects crystallization over 150°C (900–750°C)...e-mail: bscaille@cnrs-orleans.fr contents of the plagioclase. Compositional zoning of hornblende is consistent |  | | Journal (article/letter/editorial) | | settings: an example from Batan Island (Luzon volcanic arc, Philippines) Nicole Métrich a,Ł , Pierre Schiano...atmosphere (e.g., El Chichon in Mexico, Pinatubo in Philippines, Redoubt in Alaska). These high sulfur... from Batan Island in the northern part of the Luzon arc. This volcanic arc is related to the eastward...diopsidic pyroxene, and bytownitic to labradoritic plagioclase. The sample specifically studied for sulfur was...at 1150ºC, for tholeiitic melt inclusions in plagioclase (An82–85 ) containing 1325 ppm S š (1¦ ) 110 |  | XIAO, Bo, QIN, Kezhang, LI, Guangming, LI, Jinxiang, XIA, Daixiang, CHEN, Lei, ZHAO, Junxing (2012) Highly Oxidized Magma and Fluid Evolution of Miocene Qulong Giant Porphyry Cu-Mo Deposit, Southern Tibet, China. Resource Geology, 62 (1) 4-18 doi:10.1111/j.1751-3928.2011.00177.x | Journal (article/letter/editorial) | | present as inclusions in plagioclase, interstitial minerals between plagioclase and quartz, and phenocrysts...in Mexico (Luhr et al., 1984) and Mount Pinatubo in the Philippines (Bernard et al., 1991). The Qulong...of Lhasa city, the capital of Tibet Autonomous Region and 45 km north of the YarlungTsangpo River (the...km2. It consists of medium- to coarse-grained plagioclase (40–45 volume %), K-feldspar (15–20 vol. %),...monzogranite is composed of medium- to coarsegrained plagioclase (35–40 vol. %), K-feldspar (20– 25vol. %), anhedral |  | | Report (chapter) | | a function of the pressure in the magma storage region, the physical properties of the magma, such as...volcanoes there is good evidence for a magma storage region in the crust, a magma reservoir from which the... including Mount St. Helens (Scandone and Malone 1985), Mount Pinatubo in the Philippines (Pallister...such reservoirs did exist at 3-5 and >8 km under Mount Rainier at the time of its most recent (2,200 years...seismic evidence generally indicates a magma storage region in the crust or near the crustmantle boundary. |  | | Journal (article/letter/editorial) | | the Dizon Porphyry Cu-Au Deposit, Zambales, Philippines Akira IMAI* Department of Earth and Planetary...porphyry Cu-Au deposit in western central Luzon, Zambales, Philippines, is documented in terms of mineral...system. Keywords: Dizon, porphyry Cu deposit, Philippines, Luzon, fluid inclusion, hydrothermal system, sulfur...Au-rich porphyry Cu deposits in the western Luzon arc, Philippines (Bureau of Mines and Geosciences (BMG)...western flank of the Philippine Central Cordillera in northern Luzon, the Dizon deposit (Malihan, 1982 |  | | Journal (article/letter/editorial) | | on a Pleistocene adakite from Mindanao in the Philippines have been used to establish near-liquidus and...relationships relevant to conditions in the East Philippines subduction zone. The experimental starting material...the lower pressure fractionation of amphibole, plagioclase and subordinate clinopyroxene. Thus, the distinctive...Adakite Volcanic arc Crystal fractionation Philippines Surigao Introduction Adakite is a term applied...an adakite from the Surigao peninsula in the Philippines, where adakitic rocks are prevalent (see Sajona |  | Cao, MingJian, Hollings, Pete, Cooke, David R., Evans, Noreen J., McInnes, Brent I.A., Qin, KeZhang, Li, GuangMing, Sweet, Gabe, Baker, Mike (2018) Physicochemical Processes in the Magma Chamber under the Black Mountain Porphyry Cu-Au Deposit, Philippines: Insights from Mineral Chemistry and Implications for Mineralization. Economic Geology, 113 (1) 63-82 doi:10.5382/econgeo.2018.4544 | Journal (article/letter/editorial) | | under the Black Mountain Porphyry Cu-Au Deposit, Philippines: Insights from Mineral Chemistry and Implications...deposit in the Baguio district, Northern Luzon (Philippines) is associated with late Miocene to Pliocene...disequilibrium textures, including resorptive textures in plagioclase and distinct core rim textures in amphibole....magma. Element profiles across phenocrystic plagioclase display repeated oscillatory variations of Ca...textures and chemistry recorded by phenocrysts of plagioclase and amphibole indicate repeated mafic magma recharge |  | | Journal (article/letter/editorial) | | seismic tomography, Fe–Ti oxides, amphibole– plagioclase, plagioclase–liquid equilibria thermobarometry and... (Andersen and Lindsley 1988) and amphibole–plagioclase (Holland and Blundy 1994), are among the most...olivine, pyroxene, spinel, chlorite and, locally, plagioclase, obtained at 680–1,075°C and high-P conditions...always associated with plagioclase (Table 1), at P B 500 MPa, we avoided plagioclase-free experimental results...andesite-rhyolite 5–40 B20 B5 B25 tr Iriga Philippines Basalt-andesite 7–23 B5 B10 1–9 Btr B2 |  | Hidalgo, Paulo J., Vogel, Thomas A., Rooney, Tyrone O., Currier, Ryan M., Layer, Paul W. (2011) Origin of silicic volcanism in the Panamanian arc: evidence for a two-stage fractionation process at El Valle volcano. Contributions to Mineralogy and Petrology, 162 (6) 1115-1138 doi:10.1007/s00410-011-0643-2 | Journal (article/letter/editorial) | | May 2011 Ó Springer-Verlag 2011 Abstract In the Central American Volcanic Arc, adakitelike volcanism has...magma-type as well as to contrast its origin with other Central American silicic magmas. The Quaternary volcanic...K2O/Na2O, when compared with other Quaternary Central American volcanics at similar SiO2. These chemical...midlower crustal levels where abundant amphibole ? plagioclase and minor sphene crystallized from water-rich...research is part of a series of studies in the Central American Volcanic Arc (CAVA) that focus on the |
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