 | | 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...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...the water contents. 2 | R EGIONAL G EOLOG Y The Luzon arc formed in response to the eastward subduction |  | 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 |  | | Journal (article/letter/editorial) | | from volcanic and ultramafic regions on Luzon Island, the Philippines H.H. Schopka a,⇑, L.A. Derry a, C.A...Sciences, University of the Philippines, Diliman, Quezon City 1101, Philippines Received 7 April 2010; accepted...volcanic and ophiolitic rocks on Luzon Island, the Philippines. Luzon has a tropical climate and is volcanically...An example is the incongruent dissolution of anorthite, Ca-feldspar: CaAl2 Si2 O8ðsÞ þ 2 CO2ðgÞ þ 3 H2...weathering and atmospheric carbon fluxes from Luzon, the Philippines the variables that have been investigated |  | | 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 |  | | Journal (article/letter/editorial) | | by Jones et al. (1967). Igneous activity in the region began in the Late Cretaceous with the intrusion...crystals. Jones et al. (1967) determined the anorthite content of unaltered plagioclase phenocrysts in...intergrowths similar to those described from Mt. Pinatubo (Baker and Rutherford, 1996; Pallister et al....a laboratory experiment of anhydrite-saturated Pinatubo dacite at 760 jC, 2200 bar, and MNO-buffered oxygen...the reaction edenite + albite = richterite + anorthite, as described in Holland and Blundy (1994). A |  | | 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...the dacite was already oxidized. KEY WORDS: Pinatubo; sulfur; arc-magmas; f O2; water INTRODUCTION...Mt) ejected in the 15 June 1991 eruption of Mount Pinatubo and the ensuing climatic effects (Bluth et...of S-bearing phase relations in arc magmas. The Pinatubo volcano ejected between 6000 and 10 000 Mt of |  | 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...variations of Ca, Fe, and Sr contents with large anorthite variations and a positive correlation between...Introduction The Baguio district of Northern Luzon, Philippines (Fig. 1A) is considered one of the world’s...Yonsei University user 64 CAO ET AL. 18O 120O Luzon 123O Fig.B Manila 126O A 120O32' 120O34' |  | Cooke, D. R., Deyell, C. L., Waters, P. J., Gonzales, R. I., Zaw, K. (2011) Evidence for Magmatic-Hydrothermal Fluids and Ore-Forming Processes in Epithermal and Porphyry Deposits of the Baguio District, Philippines. Economic Geology, 106 (8) 1399-1424 doi:10.2113/econgeo.106.8.1399 | Journal (article/letter/editorial) | | and Porphyry Deposits of the Baguio District, Philippines DAVID R. COOKE,1,† CARI L. DEYELL,1,* PATRICK...7001, Australia 2 Anglo American Exploration Philippines Inc., 1101 Pearlbank Centre Building, 146 Valero...Salcedo Village, Makati City, Metro Manila, Philippines Abstract The Baguio district contains a diverse...plate and the Scarborough Ridge beneath northern Luzon over the past 3 m.y. Rapid uplift and exhumation...sulfidation epithermal veins of the southern and central Baguio district are mostly between +1 and +6 per |  | | Journal (article/letter/editorial) | | phenocrysts are mostly euhedral or subhedral. They are anorthite or bytownite and show weakly reverse compositional...Hamada and Fujii (2007) for Izu-Oshima magma. High anorthite contents (An88-92) of plagioclase phenocrysts...rocks from the Mariana arc (Alt et al. 1993) and Luzon arc (Hattori 1997). These observations suggest that...a case study of 2000 year BP Xitle volcano in central Mexico. J Volcanol Geotherm Res 120:249–270 Danhara...and origin of sulfide and sulfate in the 1991 Mount Pinatubo eruption products. In: Newhall CG, Punongbayan |  | Schaarschmidt, Anna, Klemd, Reiner, Regelous, Marcel, Voudouris, Panagiotis C., Melfos, Vasilios, Haase, Karsten M. (2021) The formation of shoshonitic magma and its relationship to porphyry-type mineralisation: the Maronia pluton in NE Greece. Lithos, 380. 105911pp. doi:10.1016/j.lithos.2020.105911 | Journal (article/letter/editorial) | | beneath Eurasia since the Cretaceous, and the Aegean region (Fig. 1) has been extending since 35 Ma due na...Oligocene sediments and volcanic rocks in the central part and by greenschist-facies rocks of the Circum...compositions or zoned plagioclase with decreasing anorthite na proportions towards the rim. Two felsic samples...metasediments that were affected by partial melting in the central Aegean (Altherr and Siebel, 2002; Stouraiti et...Marchev et al., 2004, 1998). Some granitoids in the central Aegean are interpreted as partial melts of the |  | Cao, Mingjian, Evans, Noreen J., Reddy, Steven M., Fougerouse, Denis, Hollings, Pete, Saxey, David W., McInnes, Brent I.A., Cooke, David R., McDonald, Bradley J., Qin, Kezhang (2019) Micro- and nano-scale textural and compositional zonation in plagioclase at the Black Mountain porphyry Cu deposit: Implications for magmatic processes. American Mineralogist, 104 (3) 391-402 doi:10.2138/am-2019-6609 | Journal (article/letter/editorial) | | porphyry (Black Mountain porphyry Cu-Au deposit, Philippines) was characterized for major and trace elements...nanoscale, Black Mountain porphyry Cu deposit, Philippines Introduction Textural and compositional zoning...studied (Grove et al. 1983). The Baguio district (Philippines) is one of the world’s premier mineral provinces...Manila (Philipines), at the southern end of the Luzon Central Cordillera. The geology and geochronology of...degassing of the magma chamber will affect albite– anorthite binary loops and, thus, the An values of crystallizing |  | | Journal (article/letter/editorial) | | (Fig. 1). Volcanic units dip away from a large central stock (Alto de la Blenda), interpreted to be the...including a profile through the volcanic rocks from the central stock towards the northwest, and the Bajo de la...biotite, and commonly shows interpreted to be the central volcanic conduit (Llambı́as resorption or oxidation...of the melt (Fig 6): high PH2 O increases the anorthite content of plagioclase at Fig. 5 Microphotograph...inclusions in plagioclase as a function of the anorthite content of the host. Volcanic rocks show a negative |  | | Journal (article/letter/editorial) | | reserved. 1. Introduction The 1991 eruption of Mount Pinatubo was characterized by a significant excess of...resided in a volatile phase in the dacitic magma of Pinatubo before eruption. Models that explain the origin...the BSE image. Vapor inclusions occur in the anorthite rich zone. Most of them leaked, but they occasionally...underlying mafic magma—evidence from Mount-Pinatubo, Philippines. Geology 21, 1083–1086. Hattori, K.,...evolution recorded in plagioclase zoning in 1991 Pinatubo eruption products. Am. Mineral. 81, 982–994. Hattori |  | | Journal (article/letter/editorial) | | Soufrière Hills Volcano (Montserrat), Mount Pinatubo (Philippines), and Mount St. Helens (U.S.A.) have all been...melt composition just prior to eruption [i.e., Mount St Helens (Rutherford et al. 1985; Soufrière Hills...include dacites from Mount St Helens (Geschwind and Rutherford 1995) and Mount Pinatubo (Hammer and Rutherford...those calculated for dome-forming eruptions such as Mount St. Helens and Soufrière Hills, Montserrat (Geschwind...plagioclase liquidus had been reached. The plagioclase anorthite content shows systematic variation with pressure |  | | Report (chapter) | | available elsewhere, except Iraya volcano, in the Philippines (see Arai et al. 2007). The volcanic front is...ARAI Fig. 1. Schematic map of the Kamchatka arc region, modified from Ishimaru et al. (2007, fig. 1)....been also reported from Iraya volcano, Luzon arc, Philippines (e.g. Arai et al. 1996, 2004). Arai et...the xenoliths suite from the Iraya volcano, Philippines (almost 90% of the total). There is no difference...2001; Franz et al. 2002) and Iyara volcano, Philippines (Vidal et al. 1989; Maury et al. 1992; Arai et |  | Martel, C, Pichavant, M, Di Carlo, I, Champallier, R, Wille, G, Castro, J M, Devineau, K, Davydova, V O, Kushnir, A R L (2021) Experimental Constraints on the Crystallization of Silica Phases in Silicic Magmas. Journal of Petrology, 62 (1) doi:10.1093/petrology/egab004 | Journal (article/letter/editorial) | | (Devine et al., 1998), the 1991 dacite at Mount Pinatubo, Philippines (Rutherford & Devine, 1996), the 1991–1995...dacites from Montagne Pelée (Westercamp, 1975) and Mount Saint Helens, USA (Pevear et al., 1982; Blundy &...high T/high SiO2 corner and low T near-minimum region of the ternary system (Fig. 2b). Upon increasing...dominated by four components: quartz, albite, anorthite and orthoclase. Their compositions are reported...content identical to HPG, and 13 wt % normative anorthite, similar to those of PEL and SH2. A total of 126 |  | De Angelis, Sarah H., Larsen, Jessica F., Coombs, Michelle L., Utley, James E. P., Dunn, Andrew (2020) Phase equilibrium of a high-SiO2 andesite at $$f_{{0_{2} }}$$f02 = RRO: implications for Augustine Volcano and other high-$$f_{{0_{2} }}$$f02 arc andesites. Contributions to Mineralogy and Petrology, 175 (3) doi:10.1007/s00410-020-1663-6 | Journal (article/letter/editorial) | | most comprehensively monitored and studied in the region (Power et al. 2010). 13 Vol.:(0123456789) 24...volcanoes. Inset map shows Alaska with the Cook Inlet region highlighted The three most recent eruptions of...indicates that Augustine has a complex crustal storage region comprising interconnected dikes and sills (De Angelis...starting material. The hashed grey area denotes the region in which experiment plagioclase exhibit mol.% An...experimental products (Table 3; Fig. 5). The An (anorthite) content of plagioclase ranged from An47–An81 |  | | Journal (article/letter/editorial) | | known climatic (e.g. 1982, El Chichon, and 1991, Pinatubo eruptions; Robock, 2000) and potential hazardous...effects (e.g. eruptions of Mt. Pelee, 1902, or Mount St. Helens, 1980). Petrological studies that use...eruptive products, notably: El Chichon (Luhr, 1990), Mount St. Helens (Rutherford et al., 1985; Gardner et...(Martel et al., 1990, 1999; Pichavant et al., 2002), Pinatubo (Rutherford & Devine, 1996; Scaillet & Evans,...experimental work carried out on the El Chichon and Pinatubo eruptions, and the abundance of S in glass inclusions |  | | Journal (article/letter/editorial) | | 1993) ABSTRACT Lascar Volcano, located in the Central Volcanic Zone of Northern Chile, is a medium- to...Northern Volcanic Zone (NVZ) from 2°N to 5°S, the Central Volcanic Zone (CVZ) from 16°S to 28°S, and the...Zones the crust is 50 km thick or less, but the Central Zone is built on thick (50-70 km) crust. On the...B: Glaciation. Eruption of Aguas Calient** A: Central om http://petrology.oxfordjournals.org/ at Imperial...Plagioclase compositions range from 32 to 80% anorthite. Plagioclase phenocrysts are up to 4 mm across |  | | Journal (article/letter/editorial) | | Canyon Tuff from Johnson & Rutherford (1989b); Pinatubo dacite from Scaillet & Evans (1999); Mt. Pelée...Lyngdal 98N50 98N06 MB99N32 Etendeka Fish Pinatubo Mt. Pelée quartz latite quartz latite Canyon...Canyon Tuff from Johnson & Rutherford (1989b); Pinatubo dacite from Pallister et al. (1996); Mt. Pelée...materials is similar at a given T and H2O. Its anorthite content varies between An51 and An28, decreasing...þ 2.5). For example, the Kd calculated for the Pinatubo dacite (Prouteau, 1999; Scaillet & Evans, 1999) |  | | Report (chapter) | | volcanic field and the Tancı́taro– Nueva Italia region in the Mexican Arc from Ownby et al. (2008, 2011)...on the compositions of rocks erupted in a given region or from a given magmatic system. As crustal conditions...erupted compositions 261 Mount St. Helens (n=240) 20 Mount Hood (n=107) 12 Mount Jefferson (n=48) 44...GEOROC database for Mount St Helens, Mount Hood, and Mount Jefferson. Data for Mount Hood also include...volcanism. This idea originated from a study of Mount Hood, Oregon, and this andesitic volcano provides |  | | Journal (article/letter/editorial) | | stratocone situated on the eastern edge of the Central Kamchatka Depression, where the Shchapinsky graben...historically active volcanoes (open triangles), the Central Kamchatkan Depression (dark shading), the Kamchatka...orthopyroxene, Fe-Ti oxides, and hornblende. Shaded region represents range of pre-eruptive temperatures based...based on Fe-Ti oxide geothermometry. Patterned region is estimated pre-eruption storage conditions where...KZI-8c n, number of analyses averaged; An, mole % Anorthite; m, melting experiments; c, crystallization experiments |  | | Journal (article/letter/editorial) | | lavas; EL= El Chicon NR = Navada del Ruiz P = Pinatubo 0 EL NR P +2 +4 +6 40 -2 Arc Basalt Measured...many oxidized, erupted arc magma such as Pinatubo, Philippines (Bernard et al. 1991) or El Chichón, Mexico...et al. 2012). This even seems to be true for Mount Pinatubo, where sulphate is clearly the stable sulphur-bearing...prepared from various synthetic materials (albite, anorthite, orthoclase, fayalite, quartz, rutile and haematite)...GPa demonstrate lower Ti and higher Ca values. Anorthite content of plagioclase varies from 26 to 42 mol% |  | | Journal (article/letter/editorial) | | include excess sulfur in eruptions like that of Mount Pinatubo (e.g., Wallace and Gerlach, 1994; Iacovino...the caldera-forming eruptions in our dataset (Pinatubo, Santorini, Rotoiti, Oruanui, Bishop) (Hattori...Ratio (lower) Vertical Separation Ratio (upper) Pinatubo 1991 CE 4-5 4.5 0.90 1.13 9 Absent or small...calculated H2 O (wt%)c max calculated H2 O (wt%) Pinatubo White dacite 1991 CE 770-790 1700-2700 Al-inhornblende...and Lange (2015), which describes how higher anorthite contents in plagioclase record higher magmatic |  | | Journal (article/letter/editorial) | | Cretaceous–Tertiary (K/T) beds near Gubbio in central Italy. The interpretation of this iridium spike...variations on the theme to the system ‘Quartz–Albite–Anorthite–Orthoclase±water±carbon dioxide’, introducing...temperate regions, such as the Alps or northern Central Europe. It became necessary therefore to demark...sediments are even difficult to trace in the local region, let alone beyond. Few organisms actually appear...boundary long advocated by the Dutch in the North Sea region. This boundary is highly suited to international |
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