 | | Journal (article/letter/editorial) | | Petrology of Dunedin Volcano R.C. Price Department of Geology, University of Otago, Dunedin, New Zealand* B.W...that the range in rock types making up the Dunedin volcano has developed by crystal fractionation processes...variants on these series. The phonolitic rocks of the volcano are low pressure differentiates derived by fractional...outlined above. Quartz normative trachytes of the volcano appear to be differentiates from a distinct saturated...Introduction Age and History of the Volcanism The Dunedin Volcanics form a prominent massif about 30 km in |  | | Journal (article/letter/editorial) | | the Banks Peninsula Volcanoes, South Island, New Zealand R.C. Price I and S.R. Taylor 2 1 Department of...the volcanic sequence of the twin volcanoes of Lyttelton and Akaroa, Banks Peninsula, New Zealand a number...Formation, but unconformably overlain by the main volcanic dome sequence, is a unit of rhyolite (Gebbies...into the crust. Between 12 and 9.7 m.y. a large volcanic dome, composed mainly of hawaiite, was built at...Lyttelton. Dykes, which intrude the Lyttelton volcanic sequence, range in composition from basalt to |  | | Journal (article/letter/editorial) | | in Undersaturated Volcanic Rocks from the East Otago Volcanic Province (New Zealand) and Related Rocks...petrology of the East Otago Volcanic Province (late Miocene), including the Dunedin Complex, is dominated...range of relatively potassic volcanic rocks is also developed in the Province. The degree of undersaturation...intrusives in the Province, assessed in conjunction with similar data from other volcanic provinces, demonstrate...production of phonolite from trachyte in the East Otago Province has not been demonstrated. The mafic variants |  | | Report (issue) | | NEW ZEALAND DEPARTMENT OF SCIENTIFIC AND INDUSTRIAL RESEARCH NEW ZEALAND GEOLOGICAL SURVEY 125th ANNIVERSARY...1865 -1990 NEW ZEALAND GEOLOGICAL SURVEY BULLETIN 104 ISSN 0077-9628 Minerals of New Zealand by G. L....initials should be G.T., not G.L. Lower Hutt, New Zealand 1990 I I Beach sand, alluvium, • terrace...rocka, particularly greywacke Young (Cenozoic) volcanic rocks, including 4. modern volcanoes 5. s 9...9 Iii ■t Old (Mesozoic and Paleozoic) volcanic rocks Schist Gneiss and granulite 20 6 Figure |  | | Journal (article/letter/editorial) | | mixing in the Puy Griou/Griounot area of the Cantal volcano (10 3 Ma). Petrographic evidence for injection...that, unlike most other fractionated magmas of the region, phonolites which show evidence for magma mixing...responsible for some of the variability observed in volcanic and plutonic rocks. Application of fluid dynamic...has been considered to be the trigger for major volcanic eruptions. Field, petrological and geochemical...curved. Geological setting The alkaline volcanic province of the French Massif Central is dominated |  | | Journal (article/letter/editorial) | | Western Otago, New Zealand by A. F. COOPER Department of Geology, University of Otago, Dunedin, New Zealand...part of a lamprophyre dyke swarm from West Otago, New Zealand comprises monchiquites and camptonites. Dykes...Terrane in South Westland and western Otago, South Island, New Zealand (Fig. 1). The swarm extends from the...FIG. 1. Locality map of the Alpine dyke swarm. New Zealand. Locations of dykes discussed in this repon are...May 12, 2015 A OCELLAR LAMPROPHYRES FROM NEW ZEALAND 141 FIG. 2. OU 27518.* Holocrystalline lamprophyre |  | | Journal (article/letter/editorial) | | comparable extent. For example, the lavas of Karisimbi, East Africa, show a range of compositions reflecting...responsible for diversity in the composition of alkalic volcanic and hypabassal rock suites. Introduction Despite...the late Quaternary cinder cones of the andesite volcano Colima (Luhr and Carmichael 1981), two leucite...(SSC-[I, 2]) series of lavas from the Lake Rudolf region (Brown and Carmichael 1969, 1971), a basalt glass...andesite from the floor of the caldera of the Colima volcanic complex (COL-11/10; Luhr and Carmichael 1980) |  | | Journal (article/letter/editorial) | | Geochemistry of phonolites and trachytes from the summit region of Mt. Kenya R.C. Price 1, R.W. Johnson 2, C.M...set of samples from the summit region of the Plio-Pleistocene volcano, Mr. Kenya. Most of the samples...presents data for a suite of samples from the summit region of Mt. Kenya. The suite covers a range of phonolitic...summit of 5,200 m is a central volcano located to the east of the East African Rift (Fig. 1). "~~ L...O~orgesailie Fig. 1. Mt. Kenya, the Gregory Rift, and the East African Rift System. Pliocene central volcanoes |  | | Journal (article/letter/editorial) | | processes in a peralkaline system: The Paisano volcano, west Texas WILLIAM F. MCDONOUGH* and DENNIS0....flows, exposed in the caldera wall of the Paisano volcano, west Texas, document systematic fractional crystallization...magma-mixing; similar flows occur in other parts of the volcano at the same stratigraphiclevel. This composite...trachytic magma, derived from a similar source region which yielded the earlier caldera wall flows. Trace...composition, mineralogy and depth of the source region(s) which generated these magmas cannot be constrained |  | Martin, Adam P., Price, Richard C., Cooper, Alan F., McCammon, Catherine A. (2015) Petrogenesis of the Rifted Southern Victoria Land Lithospheric Mantle, Antarctica, Inferred from Petrography, Geochemistry, Thermobarometry and Oxybarometry of Peridotite and Pyroxenite Xenoliths from the Mount Morning Eruptive Centre. Journal of Petrology, 56 (1) 193-226 doi:10.1093/petrology/egu075 | Journal (article/letter/editorial) | | Department of Geology, University of Otago, PO Box 56, Dunedin, New Zealand, 2Science and Engineering, University...University of Waikato, Hamilton, New Zealand and 3Bayerisches Geoinstitut, University of Bayreuth, 95440...address: GNS Science, Private Bag 1930, Dunedin, New Zealand. Telephone: (þ64) 3 4799683. E-mail: adammartin2000@yahoo...element (and isotope) signatures seen in Cenozoic volcanic rocks from Mount Morning, elsewhere in Victoria...rology.oxfordjournals.org). The Mount Morning volcanic rock major and trace element and isotopic chemistry |  | | | | NORTH ISLAND NEW ZEALAND Poor Kn1ght1 Is • . ,, r ,n H~n & C h1ck...Mayor I WodlO(O Rivt~r I'. MY OF East C,pe Pf.NEW PLYMO • Cil.pe Eimo C • Portl...I . I SOUTH PACIFIC /ocEAN I I Chalmer,: OTAGO PENINSULA NEDIN ---- :aitangata Clvtho River...ISLAND f Pq,1 Pt., 1~s II t I SOUTH ISLAND NEW ZEALAND +I s University College Cardiff Library...' _____ TELE - . _, • The Geology of New Zealand Volume 2 •• J-----~---.. ~ ::,,::::j::~. |  | | Book (volume) | | NORTH ISLAND NEW ZEALAND Poor Kn1ght1 Is • . ,, r ,n H~n & C h1ck...Mayor I WodlO(O Rivt~r I'. MY OF East C,pe Pf.NEW PLYMO • Cil.pe Eimo C • Portl...I . I SOUTH PACIFIC /ocEAN I I Chalmer,: OTAGO PENINSULA NEDIN ---- :aitangata Clvtho River...ISLAND f Pq,1 Pt., 1~s II t I SOUTH ISLAND NEW ZEALAND +I s University College Cardiff Library...' _____ TELE - . _, • The Geology of New Zealand Volume 2 •• J-----~---.. ~ ::,,::::j::~. |  | | Journal (article/letter/editorial) | | 20 km long, 2 to 4 km wide en echelon line of volcanic cones that extend in a south-southwest direction...part of the Erebus volcanic province (Kyle & Cole, 1974) of the McMurdo Volcanic Group (Harrington, 1958;...1968); the latter encompasses all Late Cenozoic volcanic rocks from Victoria Land, islands in the westerns...the Balleny Islands (Fig. 1). The Erebus volcanic province is composed of strongly undersaturated alkaline...Department of Geoscience, New Mexico Institute of Mining and Technology, Socorro, New Mexico 87801. I Journil |  | | Journal (article/letter/editorial) | | mugearite-megacryst association from north-eastern New South Wales: implications for high-pressure amphibole-dominated...Department of Geology and Geophysics, University of New England, Arm• 2351, Australia 2 Department of Geology...analcime-rich mugearite near Spring Mount in north-eastern New South Wales contains dominant kaersutite, lesser...northeastern New South Wales Central Province of early Oligocene and early Miocene volcanic rocks (Wellman...M o u n t flow to o t h e r C a i n o z o i c volcanic activity in n o r t h - e a s t e r n N e w S |  | LeMasurier, Wesley E., Futa, Kiyoto, Hole, Malcolm, Kawachi, Yosuke (2003) Polybaric Evolution of Phonolite, Trachyte, and Rhyolite Volcanoes in Eastern Marie Byrd Land, Antarctica: Controls on Peralkalinity and Silica Saturation. International Geology Review, 45 (12) 1055-1099 doi:10.2747/0020-6814.45.12.1055 | Journal (article/letter/editorial) | | University of Otago, Dunedin, New Zealand2 Abstract In the Marie Byrd Land volcanic province, peralkaline...June 2016 Introduction THE LATE CENOZOIC volcanic province in Marie Byrd Land (MBL) lies on the Pacific...pantellerites, and comendites are a major part of the province. They occur in 18 shield volcanoes, some of which...largest volcano in the Cascade Range (Christiansen, 1990). Most felsic compositions in the province are found...ne-mugearite cone on the caldera rim of a comendite volcano. Similarly, in the chain as a whole, phonolitic |  | | Journal (article/letter/editorial) | | consistent with fractional crystallization dominated by sanidine (and nepheline) and pyroxene. The behaviour of...compositions. Despite similar published values of DEu for sanidine in silicic and phonolitic compositions, highly...volumes of late-Cretaceous–Palaeogene alkaline volcanic rocks (hundreds of bodies with individual outcrop...petrological type. As in other continent-wide intraplate volcanic provinces (e.g. Cainozoic volcanism of eastern...phonolitic trachytes dated at 58±2.4 Ma (K/Ar age on sanidine) occur with alkaline basalt (Dingle and Gentle |  | W�rrier, G., Beusen, J. -M., Duchateau, N., Gijbels, R., Schmincke, H. -U. (1983) Trace element abundances and mineral/melt distribution coefficients in phonolites from the Laacher See volcano (Germany) Contributions to Mineralogy and Petrology, 84 (2) 152-173 doi:10.1007/bf00371282 | Journal (article/letter/editorial) | | coefficients in phonolites from the Laacher See Volcano (Germany) G. W6rner ~, J.-M. Beusen 2, N. Duchateau...zoned late Quaternary Laacher See tephra sequence (East Eifel, WGermany) were analyzed by instrumental neutron...distribution coefficients measured in natural volcanic rocks from a differentiating magma system. . Offprint...zoned pyroclastic sequence from the Somma-Vesuvius volcano (Barberi et al. 1981) is confined to major element...Laacher See volcano 11,000 years ago represent the most recent activity of the Quaternary East Eifel volcanic |  | LEGENDRE, C., MAURY, R. C., CAROFF, M., GUILLOU, H., COTTEN, J., CHAUVEL, C., BOLLINGER, C., HÉMOND, C., GUILLE, G., BLAIS, S., ROSSI, P., SAVANIER, D. (2005) Origin of Exceptionally Abundant Phonolites on Ua Pou Island (Marquesas, French Polynesia): Partial Melting of Basanites Followed by Crustal Contamination. Journal of Petrology, 46 (9) 1925-1962 doi:10.1093/petrology/egi043 | Journal (article/letter/editorial) | | Marquesas archipelago Four Neogene–Quaternary volcanic island chains occur in French Polynesia. From...Fig. 1. Geological sketch of Ua Pou. along the East Pacific Rise. This feature suggests that the emplacement...lack of any at present well-identified active volcanic zone at its southeastern edge; that is, close...Poumaka 979 m, Poutetainui 970 m). The Ua Pou volcanic edifice is made up of a thick lava pile, mostly...basaltic flows, which occur in a very restricted area east of Hakahau, where they are exposed at present in |  | | Journal (article/letter/editorial) | | -1 ORIGINAL PAPER Intraplate volcanism in New Zealand: the role of fossil plume material and variable...2007 Abstract The geologic evolution of the New Zealand microcontinent was characterised by intermittent...evaluate the corresponding mantle evolution beneath New Zealand with a specific focus on the tectonic evolution...investigation on a suite of representative intraplate volcanic rocks from both main islands and the Chatham Islands...University of Wellington, Kelburn Campus, Wellington, New Zealand 0.7037, eHf: + 4.4, eNd: + 3.9). Whereas volcanism |  | | Journal (article/letter/editorial) | | Victoria Land: Implications for mid-Pleistocene volcanic activity in Antarctica Anastassia Y. Borisova...Victoria Land: Implications for mid-Pleistocene volcanic activity in Antarctica, Polar Science, https://doi...Victoria Land: Implications for mid-Pleistocene volcanic activity in 3 Antarctica 4 5 Anastassia Y...the currently active McMurdo volcanic group. 34 35 Keywords: volcanic tephra; Antarctica; Allan Hills;...Introduction 38 Antarctica is a volcanically active region (Kyle et al., 1990; Wörner, 1999; Van Wyk de 39 |  | | Journal (article/letter/editorial) | | Intraplate Basalts in the South Auckland Volcanic Field, New Zealand: Evidence for Two Coeval Magma Suites...HAMILTON, NEW ZEALAND 2 DEPARTMENT OF GEOLOGY, UNIVERSITY OF AUCKLAND, PRIVATE BAG 92019, AUCKLAND, NEW ZEALAND...PUBLICATION NOVEMBER 26, 2004 The South Auckland Volcanic Field is a Pleistocene (159– 051 Ma) basaltic...monogenetic field situated south of Auckland City, North Island, New Zealand. Two groups of basalts are distinguished...or earlier subduction- and The South Auckland Volcanic Field is one of a number of Pliocene to Recent |  | | Journal (article/letter/editorial) | | horizontal axis since emplacement, with Picota, east of the Vale do Barrocal fault, remaining unaffected...University on June 27, 2015 British Tertiary Province, dated at 70 and 79 m.y. (Durant et ai, 1976)...restricted zones of the intrusion, especially on the east side of Vale do Barrocal (Santos, 1973). 1-31...ill-defined poorly exposed apophysis in the extreme north-east of the mass. Strongly feldspar-phyric trachyte,...nepheline is completely absent in the west and north-east corners. The margins also show more sodic pyroxenes |  | Wiesmaier, S., Troll, V. R., Carracedo, J. C., Ellam, R. M., Bindeman, I., Wolff, J. A. (2012) Bimodality of Lavas in the Teide-Pico Viejo Succession in Tenerife--the Role of Crustal Melting in the Origin of Recent Phonolites. Journal of Petrology, 53 (12) 2465-2495 doi:10.1093/petrology/egs056 | Journal (article/letter/editorial) | | RANKINE AVENUE, SCOTTISH ENTERPRISE TECHNOLOGY PARK, EAST KILBRIDE G75 0QF, UK 6 DEPARTMENT OF GEOLOGICAL...stratigraphic constraints has since been much improved by new radiometric dating (Carracedo et al., 2007). Systematic...investigations of the compositional bimodality of the volcanic products [the ‘Bunsen^Daly Gap’, after Bunsen...compositions of the erupted material. For example, in the east African Gregory Rift Valley the eruption of Miocene...Islands are the surface expression of a 750 km long volcanic belt that is located off Morocco (Fig. 1; see |  | | Journal (article/letter/editorial) | | igneous zircon grains from calc-alkaline silicic volcanic rocks yielded ages between 299 1 and 288 3...mid-crust. These new radiometric ages constitute: (1) a consistent dataset for different volcanic events; (2)...different magmatic episodes that gave rise to thick volcanic intercalations and complex subintrusive bodies...example, existing geochronological data for Permian volcanic rocks in Sardinia are often contradictory and...and sedimentation are still poorly constrained. New radiometric data for late CarboniferousePermian igneous |  | | Report (issue) | | (Bottom) Carbonatite lava at Oldoinyo Lengai volcano, northern Tanzania. Courtesy Alexander J. Teague...in NE Africa—New data from lower-crustal and mantle xenoliths from the Bayuda volcanic field, Sudan ...Evolution of the lithospheric mantle beneath the East African Rift in Tanzania and its potential signatures...of alkaline lava series, Kilimanjaro, Tanzania: New constraints on petrogenetic processes . . . . . ...and natrocarbonatite lavas at Oldoinyo Lengai volcano, Tanzania. . . . . . . . . . . . . . . . . . . |
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