 | | Report (chapter) | | service click here to receive free e-mail alerts when new articles cite this article Permission request click...Auckland, PB 92019 Auckland Mail Centre 1142, Auckland, New Zealand (e-mail: ie.smith@auckland.ac.nz) Abstract:...Cenozoic arc-type volcanic arc in southeastern Papua New Guinea developed in an environment of complex tectonic...hypersthene with or without olivine, hornblende and biotite phenocrysts. Boninites are spatially associated...genetically unrelated to the arc-type rocks in Papua. The high-Mg rocks represent magmas derived by partial |  | | Journal (article/letter/editorial) | | Potassium Calc-Alkaline Rocks from Cape Nelson, Eastern Papua P. d-_~]~ Department of Geology, Australian National...High-K ealo-alkaline rocks from Cape Nelson, eastern Papua are dominated by andesites containing numerous...two Quaternary stratavolcanoes, Mount Victory (1925 metres) and Mount Trafalgar (1720 metres), and several...k-~ ~ c G "~°' : * E ~ '" -----.-'~,~. , New ~' ,-,,~i~ v " ' :.:...':'.~ ~ ~ I 5ol .I~ouga...I Fig. 1. New Guinea and Solomon Island area with location of Cape Nelson volcanoes Mount Victory and |  | Humphreys, M. C. S., Zhang, J., Cooper, G. F., Macpherson, C. G., Ottley, C. J. (2019) Identifying the ingredients of hydrous arc magmas: insights from Mt Lamington, Papua New Guinea. Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 377 (2139) 20180018 doi:10.1098/rsta.2018.0018 | Journal (article/letter/editorial) | | hydrous arc magmas: insights from Mt Lamington, Papua New Guinea Research M. C. S. Humphreys, J. Zhang...hydrous arc magmas: insights from Mt Lamington, Papua New Guinea. Phil. Trans. R. Soc. A 377: 20180018...geology, petrology, volcanology Keywords: Mt Lamington, subduction, magma, crystal textures, amphibole...subduction zone magmatism at Mt Lamington volcano, Papua New Guinea. Our approach uses existing trace...melts (AEMs). The AEM compositions show that Mt Lamington andesites and plutonic enclaves are dominated |  | | Journal (article/letter/editorial) | | Cenozoic volcanic rocks from southeastern Papua New Guinea I. E. M. SMITH AND W. COMPSTON L1THOS Smith...in Cenozoic volcanic rocks ~orn southeastern Papua New Gmnea. L/t/ms, Vol. 15, pp. 1~:g)--206.Oslo. ISSN...episodes of ~ate Cenozoic volcanism in southeastern Papua. Eocene tholeiitic basalts have initial ~Sr/~3r...7041+_2) in contrast to those from the contiguous Papua New Guinea mainland (0.7036-0.7054). This isotopic discontinuity... University of Auckland, Pri~ate Bag. Auckland, New Zealand; W. Compston, Research School of Earth Sciences |  | Zhang, J., Davidson, J. P., Humphreys, M. C. S., Macpherson, C. G., Neill, I. (2015) Magmatic Enclaves and Andesitic Lavas from Mt. Lamington, Papua New Guinea: Implications for Recycling of Earlier-fractionated Minerals through Magma Recharge. Journal of Petrology, 56 (11) 2223-2256 doi:10.1093/petrology/egv071 | Journal (article/letter/editorial) | | Enclaves and Andesitic Lavas from Mt. Lamington, Papua New Guinea: Implications for Recycling of Earlier-fractionated...2015 ABSTRACT Mt. Lamington is a composite, dome-forming volcano in Papua New Guinea, sitting on the Papuan...PUB, and thus that the PUB contaminated the Mt. Lamington magmas. We demonstrate that this is highly unlikely...assimilation; magmatic enclaves; magma recharge; Mt. Lamington; ophiolite contamination; Papuan Ultramafic Belt...represented by the 1951 eruption of Mt. Lamington, Papua New Guinea (PNG). The eruption initiated on 21 January |  | | Journal (article/letter/editorial) | | Ultramafic Breccias from the Musa Valley, Eastern Papua By D . H. GREEN* (PLATES I and II) ABSTRACT In...fault breccia, in the Musa Valley area of Eastern Papua, was noted by J. Thompson of the Australian Bureau... 1.—Geological map of the Musa Valley, Papua. EASTERN PAPUA. MUSA OUTLINE GEOLOGY . PAPUAN ULTUA-... Ultramafic Breccias from E. Papua GENERAL GEOLOGY South-eastern Papua forms part of the circum-Pacific...metamorphics forming the main range of Eastern Papua (Owen Stanley Range). The outcrops in the Musa Valley |  | | Journal (article/letter/editorial) | | Mexico - - : Explosive volcanic eruptions - - a new classification scheme. - - Geol. Rdsch., 62, 431~446...C0CTOHT H3 MHOI'OqHCJIeHHbIX CJI0eB, H 0CHOBaHHe Kam~oro cJIoa 0TMetIeHO MeJIKo3epHHCTO~I rI0~CTHJIKO~. ~IacTO...situated near the northern end of the Roman Volcanic Province, Central Italy (Fig. 1), a line of volcanoes stretching...from Northern Lazio to south of Frosinone. The Province covers 8,000 km 2 and its activity has been dominated...fine sandstones. Sanidine and sparse amounts of biotite and augite (yellow/green pleochroic variety) are |  | | Report (chapter) | | in Papua New Guinea H.L. Davies & A.L. Jaques SUMMARY: The major ophiolite complexes of Papua New Guinea...ophiotite complexes in Papua New Guinea: the April in the west, Marum in the centre, and Papua Ultramafic Belt...setting of each of the complexes, and present some new data for the April complex, and recently acquired...for the Marurn and PUB. We then put forward some new ideas on emplacement of ophiolite which take into...ULTRAMAFIC ~a < GULF OF D'Enlrecasteau• ~slands PAPUA Porl Moresbv OPHIOLiTE BELTS Basa/t GebMo CO R |  | | Journal (article/letter/editorial) | | trachyandesites from the 1951 eruptions of Mt. Lamington, Papua New Guinea (Taylor, 1958; Arculus et al, 1983),...localities, including El Chichon (Luhr, 1983), Mt Lamington (Taylor, 1958; Arculus et ai, 1983), Santorini...(fluid) ± plagioclase, clinopyroxene, amphibole, and biotite. Several MNO buffered experiments contain traces...= amphibole, Px = calcium-rich pyroxene, Bt = biotite, ( ) = trace amount present. § Glass sulfur contents... Px = Ca-rich pyroxene, H b = amphibole, Bt = biotite, r- = relict phase, ( ) = trace amount present |  | | Journal (article/letter/editorial) | | crystals up to 0.6 mm in size, usually enclosed in biotite rims. The olivine is chrysolite F077.3-71.9Fa22...absarokites in phenocryst balance and the occurrence of a new assemblage: plagioclase (60-65%) + clinopyroxene...(30-35%) + orthoclase (<7%) + magnetite (<5%) ± biotite (<2%) ± apatite (<1%). The groundmass is composed...generation consist of clinopyroxene and magnetite. The biotite present in some rock specimens is usually highly...come to include such hydroxyl-bearing phases as biotite, whereas the alkali levels in the minerals increase |  | | Journal (article/letter/editorial) | | Rutherford (1988) for El Chichon trachyandesite and Mount St Helens dacite show the combined effect of changing...apparently not anhydritesaturated, e.g. the Yn tephra of Mount St Helens (Geschwind & Rutherford 1992), indicating...closely studied in this context. The 1951 Mt Lamington andesite is another example of an anhydrite- ...rimmed with cummingtonite), iron-titanium oxides, biotite, anhydrite and apatite (Pallister et al. 1992;...titanomagnetite, anhydrite, apatite, sphene and biotite (Luhr et al. 1984). Before eruption, it was at |  | | Journal (article/letter/editorial) | | between 25 and 45% (50---150 MPa). The absence of biotite phenocrysts in the scoria places a tight constraint...equilibration, as there is only a small zone where biotite does not accompany hornblende in the experiments...of lava (MAS 2003a) that contain phenocrysts of biotite in addition to the phenocryst phases listed above...siliceous than the scoria, and hornblende, without biotite, occurs therein as residual cores to extensive...western Mexico (Wallace & Carmichael, 1992), Papua New Guinea (Ruxton, 1966; Arculus et al., 1983), and |  | | Journal (article/letter/editorial) | | grains are completely enclosedwithin hydrothermal biotite. Bulk compositions of the sulfates are intermediate...order of decreasingabundance)plagioclase(3 mm), biotite (1.5 mm), greenhornblende(< I mm), and lesser amounts...volo/ophenocrystsof plagioclase (-3 mm), K-feldspar (-8 mm), biotite (1.5 mm), and minor amounts of green hornblende...K-feldspar, and quartz with minor apatite and biotite. Chemical compositions of typGnor,ocy ical porphyry...geology in groundmass and the formation of secondary biotite and to Thomson (1950),Ploegerand Crocket(1982) |  | | Journal (article/letter/editorial) | | pyroxene present; amphibole and biotite absent); and hornblende (-+biotite) lavas, which prove to be mainly...(pre-eruptive) on olivine. Absence of amphibole or biotite as phenocrysts. Basaltic andesite: Presence of...reaction phase on olivine. Absence of amphibole or biotite. SiO2 < 56%. Pyroxene andesite: Presence of Ca-poor...above. Absence of amphibole or biotite. SiO2 5 6 63%. Hornblende (+- biotite) andesite: SiO2 < 63%. All rocks...rocks containing hornblende and/or biotite, or identifiable pseudomorphs after these phases, are grouped |  | | Book (edition) | | INCLUDING MATERIAL FROM THE TERRITORY OF PAPUA AND NEW GUINEA GERMAINE A. JOPLIN, B.A., PH.D., D.Sc...stabilization. The great ultramafic thrust plate in Eastern Papua (Chapter 15), possibly some of the Alpine ultramafic...rocks from some parts of the Territory of Papua and New Guinea is also included in this edition and affects...thank Dr N. H. Fisher for allowing me to include New Guinea and Papuan material collected by members of the...data. For discussion and help and for the supply of new material for this book, I am grateful to Dr H. L |  | | Journal (article/letter/editorial) | | Volcanic Group, Woodlark Island (Muyuw), eastern Papua I. D. Lindley To cite this article: I. D. Lindley...Volcanic Group, Woodlark Island (Muyuw), eastern Papua, Australian Journal of Earth Sciences, 63:6, 731-754...Volcanic Group, Woodlark Island (Muyuw), eastern Papua I. D. Lindley Research School of Earth Sciences...calc-alkaline to shoshonitic Okiduse Volcanic Group (new name). It provides an exposure of upper Cenozoic...Watou Mountain Eruptive Centre (new name) and the Uvarakoi Caldera (new name). The mafic–intermediate Watou |  | | Journal (article/letter/editorial) | | the Ertsberg Mining District in Indonesia (west New Guinea). He discovered abundant evidence for strike–slip...high-temperature core (>700◦ C to ∼500◦ C) rich in biotite and potassium feldspar (‘potassic alteration’)...of hundreds of metres across. In most deposits, biotite and magnetite in the outer part of the potassic...most distinguishing attribute is feldspar- and biotite-destructive ‘alteration halos’ that are of a lighter...has been done. Some work was done in eastern New Guinea by Titley and Heidrick (1978) and Titley et al |  | | Report (volume) | | PINE CREEK VOLCANIC ASSEMBLAGE AT MOUNT ST. HELENS, WASHINGTON SURVEY BULLETIN 1383-A PINE CREEK...CREEK VOLCANIC ASSEMBLAGE AT MOUNT ST. HELENS, WASHINGTON The flat surface of the Pine Creek assemblage...distance slopes away from the southeast side of Mount St. Helens. Part of the east bedrock valley wall...Assemblage at Mount St. Helens, Washington By DWIGHT R. CRANDELL and DONAL R. MULLINEAUX GEOLOGY OF MOUNT ST....lahars, and alluvium of postglacial age southeast of Mount St. Helens volcano UNITED STATES GOVERNMENT |  | | Journal (article/letter/editorial) | | was remobilised, with intimate mixing between the new magma batch and the old intrusions indicated by the...proceeded by extruding material dominated by the new batch of magma. This resulted in a marked increase...results for Montserrat and those from samples of Mount Unzen volcano, Japan, in 1991. ND values for Unzen...spring 1996 ^ faster extrusion of magma dominated by new batch of magma ^ contains very dominantly homogeneous...petrologically and geochemically similar andesites to the new lava, with amphibole as the dominant ferromagnesian |  | | Report (Issue volume) | | + 4, Mineral Fe # — of Australia and™ Papua New Guinea ... Geology of the Mineral Deposits of Australia and Papua New Guinea The COVER PHOTOGRAPH shows an aerial view...the east coast of Lihir Island, New Ireland Province, Papua New Guinea. The Ladolam gold deposit lies...Resources Development Centre, Port Moresby, Papua New Guinea The Australasian Institute of Mining and...Mines — 1968 1968 and Papua New Ed. C.L. Knight 1974 1975 and Papua New Eds D.M. Traves and D. |  | | Report (issue) | | taken February 1983 by Maurice Krafft. Upper right: Mount St. Helens Dome, Washington, viewed from the south...Arizona. Contents Growth of the lava dome at Mount St. Helens, Washington, (USA), 1981-1983 ......rhyolite lava flows in the Snake River Plain volcanic province, southwestern Idaho... Bill Bonnichsen and Daniel...predictable, extrusion of dacite lava in the crater of Mount St. Helens. Second, renewed deformation and seismicity...(and recently observed at Mount St. Helens) are “endogenous,” in which new lava is added to the interior; |  | | Report (issue) | | 227 227 227 227 2 27 228 228 228 228 229 229 New Guinea ..................................................... Upper Paleozoic basement of southeast New Guinea ....... Paleozoic shelf or platform strata ..... Rifting of Malay-Sumatra subcontinent from New Guinea ............................................... Mesozoic and Cenozoic evolution of southern New Guinea .... Late Mesozoic and early Tertiary continental...continental shelf .......... Torres Strait and Gulf of Papua ....................................... Neogene |  | | Journal (article/letter/editorial) | | sanidine, calcic and ortho-pyroxenes, horn- blende, biotite, olivine, magnetite and ilmenite. Limited data...central Queensland); dacite from Mount Lamington, Papua New Guinea (sample 63); three quartz latites...from Matupi volcano, Papua New Guinea (23876); peralkaline rhyolites, Mayor Island, New Zealand (AEE1 and...Orthopyroxenes i i 0.1 i I I Hornblende [] Biotite 100 J ,, +. . . . . . . . . . 100 I\~. l ...f o 10 + LL t- N i 0.1 i • Hornblende ~ Biotite 100 T. . . . . Q~ r 0.01 NBO/T f 1 = N i |  | | Journal (article/letter/editorial) | | shown as open squares. Additional samples from Papua New Guinea, southern Japan, Baja California, western...poor analog for continental hornblende and/or biotite, which fractionate Mgf~s in crust. Sisson and Grove's...Other samples, shown as open circles, are from the New Britain arc, the Coast Ranges plutonic belt, the...trachybasalts, and cognate inclusions of Mount Lamington, Papua New Guinea: anhydrite-amphibole-bearing lavas...trondhjemites, and granodiorites (TTG) in the SW Superior Province were derived from mantle melts, not by melting |  | 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) | | anhydrite prior to the 1991 climactic eruption of Mount Pinatubo, Philippines RYAN T. JAKUBOWSKI,1,* JOHN...A. ABSTRACT Anhydrite (CaSO4) phenocrysts from Mount Pinatubo pumices show evidence of having responded...present such as Nevado del Ruiz (Fournelle 1990) and Mount Pinatubo. It has been predicted experimentally that...anhydrite by meteoric water (Luhr et al. 1984). Mount Pinatubo pumice: chemistry and mineralogy Beginning...discovered in Mt. Pinatubo Brought to you by | New York University Bobst Library Technical Services |
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