 | | 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) | | phonolitic lavas from Nigeria, Australia, East Germany and New Zealand ANTHONYJ. IRVING* tunar and Planetary...Phonolite Hill (northeastern Australia) and Heldbmg (East Germany) is consistent with an origin by fractional...benmoreite from Pigroot (New Zealand) to basanitic lavas of the East Otago province is not supported by major...possibly the product of melting of a mantle source region previously enriched in Sr and light rare earth...MACDONALD THERE IS considerable evidence that volcanic rocks and KATSURA,1964, p. 99; NICHOLLS and LORENZ |  | | 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) | | Department of Geology, University of Otago, Dunedin (New Zealand) Received November 3, 1975 Revised version...November 16, 1976 On the basis of K/Ar muscovite and biotite ages, and of Rb/Sr whole-rock, muscovite, and feldspar...Fiordland and southern Stewart Island in southern New Zealand and from Ford Range and other localities in West... extending 9 ° south and 10 ° east of the South Island of New Zealand [ 1 ], consists of continental-type...area of the Snares Islands, 120 km south o f New Zealand [8,10,11 ], and also crops out under Tertiary |  | | 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) | | WESTLAND, NEW ZEALAND Alan F. COOPER§ and Lorraine A. PATERSON Geology Department, University of Otago, P.O...O. Box 56, Dunedin, New Zealand Abstract A late Oligocene – early Miocene alkali lamprophyre dyke swarm...swarm was emplaced in western South Island, New Zealand, during transtensional development of the Alpine...component, liquid immiscibility, South Island, New Zealand. Sommaire Un essaim de filons de lamprophyres...Introduction In the Southern Alps of northwestern Otago and south Westland, the Haast Schist basement is |  | | 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 |  | | 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) | | com/locate/gca Petrogenesis of Cenozoic, alkalic volcanic lineages at Mount Morning, West Antarctica and...Department of Geology, University of Otago, P.O. Box 56, Dunedin, New Zealand b Science and Engineering, University...University of Waikato, Hamilton, New Zealand Received 21 July 2012; accepted in revised form 20 August...available online 30 August 2013 Abstract Two volcanic lineages are identified at Mount Morning, a Cenozoic...West Antarctica, which is part of the McMurdo Volcanic Group. Both the older (at least 18.7–11.4 Ma) |  | | 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) | | although many of acid volcanic rocks in the areas consist of phenocrysts of biotite or hornblende. These...Northeast Japan, which belong to the Green Tuff region. The Middle Miocene formation named the Tsugawa...lavas with conglomerate, sandstone and mudstone. Volcanic rocks of this formation are interpreted as products...the thick divided into Nanatani include biotite Formation. ferroaugite area, the to the Tsugawa...pyroxene perlites mentioned-above, most of the acidic volcanic rocks of the Tsugawa Table 1. Chemical of perlite |  | | Journal (article/letter/editorial) | | 94:461-471 9 Springer-Verlag 1986 Petrology of volcanic rocks from Kaula Island, Hawaii Implications for... Abstract. A compositionally diverse suite of volcanic rocks, including tholeiites, phonolites, basanites...previously, had only been reported in the Honolulu volcanic rocks) and the similar age of the Kaula basanite...light gray (phonolite) and dark gray (basalt) volcanic rocks, coralline material, coarse-grained ultramafic...geochronological data on the distinctive, accidental volcanic blocks recovered from Kaula Island and to compare |  | | Journal (article/letter/editorial) | | 425 The iron-titanium oxides of some Dunedin (New Zealand) lavas, in relation to their palaeomagnetic...p a r t m e n t , U n i v e r s i t y of Otago, N e w Zealand 1 [Read 8 June 1967] Summary. Earlier palaeomagnetic...palaeomagnetic studies on the Dunedin volcano showed that a portion of the sequence is reversely or anomalously...operative, the reversely magnetized part of the Dunedin sequence was probably erupted during a reversed...phonolites f r o m the Mio-Pliocene D u n e d i n volcano v a r i e d w i t h respect to their position in |  | | Journal (article/letter/editorial) | | is that they have similar slopes in the La-Sm region for differing degrees of REE enrichment (Fig. 1)...pronounced parallelism of the patterns in the La-Sm region. This feature is also displayed by individual suites...sp: sphene; ep." epidote; hb: hornblende; bi: biotite (Mason 1975); da: davidite (Campbell and Kelly...modelling of three alkali basalts from the Dunedin Volcano, New Zealand (Price and Taylor 1973). The points...neglected. The periodicity of eruptions for an alkali volcano, which is of the order of 100 years, is consistent |  | | | | 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) | | 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 (issue) | | Earth Sciences, Macquarie University, North Ryde, New South Wales 2113 Australia ABSTRACT. Cainozoic alkali...alkali baS'altic rocks from the Southern Highlands province, eastern Australia, range from olivine nephelinites...Southern Highlands province (fig. I) covers approx 50 km2 southwest of Sydney, New South Wales, Australia...Southern Highlands basaltic rocks as a discrete province is partly based on their geographical distribution...charac terize the Southern Highlands as a discrete province, to show the domi nance of primary or primitive |  | | 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) | | REE-Fractionated Traehytes and Dacites From Papua New Guinea and Their Relationship to Andesite Petrogenesis...Bureau of Mineral Resources, P.O. Box 378, Canberra City, A.C.T. 2601, Australia Abstract. Minor trachyte...separated from, arc-trench type volcanoes in Papua New Guinea have distinctive REE abundances similar to...appear to be a part of the nearby late Cenozoic volcanic provinces, and possibly represent minor partial...the Earth's surface. Introduction Island-arc volcanic rocks do not appear to represent direct partial |  | | Journal (article/letter/editorial) | | of Late Cenozoic alkaline lavas of the McMurdo Volcanic Group, Antarctica PHILIP R. KYLE* Departments...Victoria University of Wellington, Wellington, New Zealand and PETER C. RANKIN Soil Bureau, Department...Scientific and Industrial Research, Lower Hutt, New Zealand (Received 12 January 1976; accepted in revisedfirm...representative of four lava lineages of the McMurdo Volcanic Group, Antarctica. A kaersutite and two feldspar...rare earth element (REE) abundances in alkali volcanic rocks have been used to elucidate fractional crystallization |  | | Journal (article/letter/editorial) | | its occurrence in a wide range of plutonic or volcanic rocks, the chemical evolution of nepheline during...limited variations (e.g. Sack and Ghiorso, 1998). Volcanic nephelines are more variable than their plutonic...between natural nepheline data from plutonic and volcanic rocks, Tilley (1954) inferred that nepheline compositions...Cretaceous annular complex located in the Etendeka province of NW Namibia. It is part of a series of alkali...intruded by granitic rocks. In the northwestern region of the complex, two or three rocky outcrops occur |  | | 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 |  | | Journal (article/letter/editorial) | | Composition of Alkaline Rocks: New Data from Southern Portugal and East Africa N.M.S. Rock Department...the normal manner of the alkali basalt-trachyte volcanic suite. "Carbonatitic" suites consist of more strongly...claimed as a reasonable representation of the volcano. Rocks have been chosen from the remaining complexes...1974) and also to the plutonic series of the Oslo Province. The petrology of the mass has been described...Sousa (1926). It intrudes carboniferous pelites. The East African Rift contains a great many young or recent |  | | Journal (article/letter/editorial) | | enriched accessory phases, either in the source region or in the subsequent fractionation of derived magma...may leave residual accessory phases in the source region. In this situation, the accessory phase(s) must...accessory phases contributing to the melt in the source region. The anomalous Y, REE-enriched tholeiites of Norfolk...REEenriched accessory phase in a heterogeneous source region (T.H. Green, 1978). The viability of a disequilibrium...saturated with any accessory mineral in its source region, once the magma has separated from the residual |
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