 | Hock, M., Friedrich, G., Plüger, W. L., Wichowski, A. (1986) Refractory- and metallurgical-type chromite ores, Zambales ophiolite, Luzon, Philippines. Mineralium Deposita, 21 (3) 190-199 doi:10.1007/bf00199799 | Journal (article/letter/editorial) | | metallurgical-type chromite ores, Zambales ophiolite, Luzon, Philippines M. Hock 1, G. Friedrich, W.L. Pliiger...Abstract. The Zambales ophiolite is the major source of chromite ore in the Philippines. The chromitites...metallurgical-type chromite ores was first observed in Zambales by Fernandez (1960) and has been frequently noted...Al'Ays, Saudi Arabia; the Ural, UdSSR; and in north central Oman (Leblanc and Violette 1983). Geologic setting...peridotites of the Zambales maficultramafic complex form the lowermost level of the Zambales ophiolite, overlain |  | Yumul, Graciano P., Dimalanta, Carla B., Salapare, Ricky C., Queaño, Karlo L., Faustino-Eslava, Decibel V., Marquez, Edanjarlo J., Ramos, Noelynna T., Payot, Betchaida D., Guotana, Juan Miguel R., Gabo-Ratio, Jillian Aira S., Armada, Leo T., Padrones, Jenielyn T., Ishida, Keisuke, Suzuki, Shigeyuki (2020) Slab rollback and microcontinent subduction in the evolution of the Zambales Ophiolite Complex (Philippines): A review. Geoscience Frontiers, 11 (1) 23-36 doi:10.1016/j.gsf.2018.12.008 | Journal (article/letter/editorial) | | subduction in the evolution of the Zambales Ophiolite Complex (Philippines): A review Graciano P. Yumul Jr...Apex Mining Company Inc., Ortigas, Pasig City, Philippines Rushurgent Working Group, National Institute...Science, University of the Philippines, Diliman, Quezon City, Philippines c GHD, Chino Roces Avenue,... Makati City, Philippines d Department of Environmental Science, Ateneo de Manila University, Quezon...City, Philippines e School of Environmental Science and Management, University of the Philippines - Los |  | | Journal (article/letter/editorial) | | of ophiolitic chromitites in the Zambales Range, Luzon, Philippines M. Hock 1 and G. Friedrich Institut...peridotites of the Zambales mafic-ultramafic complex form the lowermost level of the Zambales ophiolite, which...investigated chromite deposits Plate tectonics The Zambales ophiolite is a part of the Philippine islandarc...investigators such as Karig (1971) describe the Zambales ophiolite as a fragment of oceanic crust of the...(1983) and Hawkins and Evans (1983) predate the Zambales ophiolite relative to the opening of the South |  | | Journal (article/letter/editorial) | | 2001 The Acoje Block Platiniferous Dunite Horizon, Zambales Ophiolite Complex, Philippines: Melt Type...Controls Graciano P. YUMUL, Jr. Abstract: The Zambales Ophiolite Complex, a supra-subduction zone ophiolite...arc-related Acoje block. This crust-mantle sequence hosts platinum-group elements (PGE) in the Acoje block...the distribution and deposition of the PGE in the Acoje block are affected by olivine, chromite and sulfide...main platiniferous zone is confined within the Acoje block transition zone dunite. (Ni and Cu) metals |  | | Journal (article/letter/editorial) | | http://www.tandfonline.com/loi/tigr20 Zambales Ophiolite Complex (Philippines) Transition-Zone Dunites: Restite... Graciano P. Yumul a a University of the Philippines Published online: 14 Jul 2010. To cite this...article: Graciano P. Yumul (2004) Zambales Ophiolite Complex (Philippines) TransitionZone Dunites: Restite...Son, Inc. All rights reserved. Zambales Ophiolite Complex (Philippines) Transition-Zone Dunites: Restite...Science, University of the Philippines, Diliman, Quezon City, Philippines Downloaded by [University |  | | Journal (article/letter/editorial) | | Boninite and boninite-series volcanics in northern Zambales ophiolite: doubly vergent subduction initiation...Company Inc., Ortigas Center, Pasig City, 1605, Philippines 3 Research Institute of Earthquake and Volcano...Geology, Geological Survey of Japan, AIST, Tsukuba Central 7, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8567, Japan...boninite in the middle Eocene Zambales ophiolite (Luzon Island, Philippines). Olivine–orthopyroxene microphyric...juvenile arc section (Barlo locality, Acoje Block) of the Zambales ophiolite. This upper volcanic unit |  | | Report (issue) | | CHROMITE DEPOSITS OF THE NORTH-CENTRAL ZAMBALES RANGE, LUZON, PHILIPPINES by D. L. Rossman U. S. Geological............................. 7 GEOLOGY OF THE ZAMBALES COMPLEX................................ 8 General.......................... 23 STRUCTURE OF THE ZAMBALES COMPLEX.............................. 24 Layering....... 33 Reserves of chromite in the Goto and Acoje mines........ 34 Description of chromite deposits........... 36 Acoje mine.............................................. 36 Goto mine............... |  | | Journal (article/letter/editorial) | | chromitedeposits in the Acojeand the Cotodistricts(Zambales, Philippines)and after comparisonswith the chromite pods...thattheCr-richpodsarelocatednearthelherzolite-harzburgite transition zonewhereas theAl-richpodsaredistributed...cteristic of podiformchro- podiform in the Philippines(Violette, 1980; Nicolasand Vimite deposits(Thayer...1946);Camag•iey,Cuba(Flint et al., 1948); Zambales, Philippines (Fernandez,1960);Bay of Islands,Newfoundland...PodiformChromiteDepositsin the Acojeand Coto Districts (Zambales,Philippines) The Philippinesare the major sourceof |  | 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) | | Spinel Peridotite Xenoliths in Mt. Pinatubo, Philippines Betchaida D. Payot 1, *, Shoji Arai 2 , Masako...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...close to the summit of Mt. Pinatubo. Spinel harzburgite is the most dominant lithology among dunites...xenoliths; Mt. Pinatubo; Philippines; mantle wedge; abyssal lherzolite; arc harzburgite 1. Introduction Sandwiched |  | | Journal (article/letter/editorial) | | COEXISTING OLIVINE AND PYROXENES FROM THE ACOJE ULTRAMAFICS, PHILIPPINES TERUYUKI TAKEDA and HITOSHI ONUKI...their olivines and pyroxenes from the Acoje mine, Philippines were chemically studied. From the data...data based on the pyroxene grid the Acoje peridotites seem to be recrystallized under conditions prevailing...peridotites. fic rocks INTRODUCTION The Zambales Philippines, western coast Bataan Peninsula, 180•~35...by sandstone and south rocks of Tertiary Zambales dunite, have serpentinization, about Range |  | Aquino, Karmina A., Arcilla, Carlo A., Schardt, Christian, Tupaz, Carmela Alen J. (2022) Mineralogical and Geochemical Characterization of the Sta. Cruz Nickel Laterite Deposit, Zambales, Philippines. Minerals, 12 (3) 305 doi:10.3390/min12030305 | Journal (article/letter/editorial) | | Characterization of the Sta. Cruz Nickel Laterite Deposit, Zambales, Philippines Karmina A. Aquino 1,2, *...Characterization of the Sta. Cruz Nickel Laterite Deposit, Zambales, Philippines. Minerals 2022, 12, 305....University of the Philippines, Velasquez St., Diliman, Quezon City 1101, Philippines; caloy.arcilla@gmail...Research Institute, Diliman, Quezon City 1101, Philippines Artec Umweltpraxis GmbH, Fabrikgasse 2, 08294...laterite profile at the Sta. Cruz nickel laterite deposit, Zambales, Philippines. Wavelength-dispersive X-ray |  | | Journal (article/letter/editorial) | | Sciences, University of the Philippines, Diliman, Quezon City 1101, Philippines, 3Monte Oro Resources and...Stock Exchange, Ortigas Center, Pasig City 1605, Philippines Abstract Well-preserved oval-shaped dunite clots...chromitites from the Coto Block of the Zambales Ophiolite Complex, the Philippines. The dunite/ chromitite boundary...Keywords: chromite-oversaturated melt, dunite, Philippines, podiform chromitite. 1. Introduction Podiform...enigmatic rocks, enveloped by dunite and hosted by harzburgite as a whole (e.g., Arai, 1997). The process of |  | | Journal (article/letter/editorial) | | Potential of the Amnay Ophiolitic Complex, Mindoro, Philippines Graciano P. Yumul Jr,1,2 Ferdinand T. Jumawan1...Science, University of the Philippines, Diliman, Quezon City, Philippines and 2Department of Science...Metro Manila, Philippines Abstract The Amnay Ophiolitic Complex in Mindoro, the Philippines, is considered...chromitite, fertile mantle, Mindoro, ophiolite, Philippines, South China Sea. 1. Introduction A lot of information...the surrounding oceanic marginal basins of the Philippines (e.g. Dimalanta et al., 2002; Hickey-Vargas, |  | | Journal (article/letter/editorial) | | isotopic and REE constraints from the Zambales ophiolite, Philippines Peng-Fei Zhang a,b,c,⁎, Mei-Fu Zhou...Company, Inc., NAC Tower, BGC, Taguig city, Philippines b a r t i c l e i n f o Article history: Received...2021 Available online 9 January 2021 Keywords: Acoje block High-Cr chromitite Li isotopes Slab dehydration...b s t r a c t The Acoje block of the Zambales ophiolite in the Northwest Philippines is a remnant of forearc...clinopyroxene in harzburgites and dunites of the Acoje block. We use this dataset to explore the nature |  | | Journal (article/letter/editorial) | | generation of arc-like melts in the Zambales ophiolite, Philippines: Pb, Sr and Nd isotopic constraints...crustal and mantle rocks of the Zambales ophiolite ŽLuzon, Philippines., were obtained to help constrain...separates from the crust and mantle sections of the Zambales ophiolite. The isotopic data, in conjunction with...Tectonic setting and geochemistry of the Zambales ophiolite The Zambales ophiolite is exposed in a north– south...east along the western side of central Luzon in the northern Philippines ŽFig. 1.. The large northern Masinloc |  | | Journal (article/letter/editorial) | | Spfinger-Verlag1989 Zambales ophiolite, Philippines II. Sulfide petrology of the critical zone of the Acoje Massif...USA Abstract. The Acoje massif is part of a mafic-ultramafic complex, the Zambales ophiolite, and is...associated phases in the critical zone of the Acoje massif. The Acoje critical zone (ACZ) forms the basal cumulate...occurred during retrograde serpentinization of the Acoje massif. Two end-member models that could explain...zone of the Acoje massif, Zambales ophiolite, Philippines (Abrajano et al. 1989). The Acoje critical zone |  | | 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) | | mantle it reacts with the host lherzolite or harzburgite to form a modified magma, enriched in silica...silica, and a highly depleted residue of harzburgite and dunite. Continuous reaction between the magma and...depleted harzburgite, whereas high-AI varieties should be hosted in less-depleted harzburgite and lherzolite...lherzolite. The high-Cr Acoje and high-AI Coto deposits of the Philippines provide good examples of this...Hock et al. 1986). Mantle peridotites hosting the Acoje deposit are more depleted in CaO and Alz0 3 and |  | | Journal (article/letter/editorial) | | CHROMITE DEPOSIT ZAMBALES, LUZON, PHILIPPINE ISLANDS BY W. C. STOLL ABSTRACT The Masinloc mine, the world's...of refractory-grade chrome ore, is at Goto, Zambales, Luzon, Philippine Islands. Ore production from 1946...dikes and overlapped by Miocene sediments. Near the mine, the complex is composed of pseudostratified gneissose...420 W. C. STOLL—MASINLOC CHROMITE DEPOSIT, PHILIPPINES into higher levels of the complex. The temperatures...Introduction and acknowledgments Country rocks Zambales ultramafic complex General statement Field relations |  | | Journal (article/letter/editorial) | | in ophiolite complexes. In the Vourinos, only harzburgite has a tectonic fabric. In the Troodos, deformation...increases downward from wehrlite through dunite into harzburgite. At Canyon .\fountain, the earliest identifiable...and ultramafic rocks together in the Zambales Complex (Philippines) are cited as additional evidence that...subsolidus deformation in ophiolitic rocks other than harzburgite are widespread and have been overlooked. Amphibolite-facies...troctolite; and gahbroic rocks at the top. The harzburgite generally is distinguished from wehrlite and |  | | Journal (article/letter/editorial) | | chromitites of the Sartohay ophiolite of Xinjiang Province have chromites with low Cr numbers (<70) and are...are associated with dunite and highly depleted harzburgite, the magmas from which they crystallized are...chromitites occur only in the highly depleted harzburgite ophiolite type (HOT) (e.g., Roberts, 1988; Nicolas...such bodies should be hosted in highly depleted harzburgite or dunite. However, podiform chromitites include...peridotites, have rims or bands of dunite and harzburgite, similar to those hosting high-Cr varieties. |  | | Journal (article/letter/editorial) | | mantle tectonites consist of partly serpentinized harzburgite grading upward to a transition zone of harzburgites...refractory-grade ore. Most are of small size, the Mercedita mine being the largest, but total ore reserves are more...ultramafic rocks in the transition zone are mainly harzburgite and dunite, but there are also considerable amounts...lithologies including plagioclase-dunite and harzburgite, and troctolites. The transition-zone ultramafic...76 65 64 0.20 0.34 0.28 13.20 0.10 59 Harzburgite CMM20-1 2.44 32.52 2.86 23.00 1.59 5.3 |  | González-Jiménez, José María, Griffin, William L., Proenza, Joaquín A., Gervilla, Fernando, O'Reilly, Suzanne Y., Akbulut, Mehmet, Pearson, Norman J., Arai, Shoji (2014) Chromitites in ophiolites: How, where, when, why? Part II. The crystallization of chromitites. Lithos, 189. 140-158 doi:10.1016/j.lithos.2013.09.008 | Journal (article/letter/editorial) | | Bulgarian Rhodopes (González-Jiménez et al. 2013b), and Santa Elena in Costa Rica (Zaccarini et al., 2011). Type...(Pedersen et PT al., 1993); Acoje block of the Zambales Ophiolites in the Philippines (Bacuta et al., 1990);...chromitites SC RI and lherzolite-type and harzburgite-type ophiolites, as defined by Ishiwatari (1985)...suggested that chromitites are restricted to harzburgite-type ophiolites that formed in oceanic-ridge...petrological characteristics of both lherzolite- and harzburgite-type ophiolites. He concluded that the largest |  | Angeli, N., Fleet, M. E., Thibault, Y., Candia, M. A. F. (2001) Metamorphism and PGE-Au content of chromitite from the Ipanema mafic/ultramafic Complex, Minas Gerais, Brazil. Mineralogy and Petrology, 71 (3) 173-194 doi:10.1007/s007100170038 | Journal (article/letter/editorial) | | version accepted October 12, 2000 Summary The Santa Cruz massif, which forms part of the Ipanema ma®c/ultrama®c...Ipanema Komplex, Minas Gerais, Brasilien Das Santa Cruz Massiv, das Teil des ma®schen/ultrama®schen Ipanema...Gerais State, Brazil (inset), and showing the Santa Cruz massif: BH Belo Horizonte, SP SaÄo Paulo, RDJ...chromitite layer in the largest of these massifs, i.e. Santa Cruz. The Ipanema Complex is one of several ma®c/ultrama®c...de Fora Complex of the Mantiqueira Structural Province (Angeli and Choudhuri, 1985). The Juiz de Fora |  | | Journal (article/letter/editorial) | | whereas chromite deposits are restricted to harzburgite ophiolites. All deposits are located in the transition...the two principal types of ophiolites: a) the harzburgite type (HOT), illustrated by the Oman ophiolite...to slow spreading rate), and the harzburgite type (HOT or Harzburgite Ophiolite Type), with horizontal...Albania, Guleman (Turkey), Kerman (Iran), Zambales (Philippines), Cuba, Vourinos (Greece) and Ttebaghi (New...maximum dimensions), and the Coto deposit in the Philippines (Violette, 1980) with a tonnage of 24 Mt (600 |
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