 | | Journal (article/letter/editorial) | | Australian National University, Canberra, A.C.T. 2600, Australia Received 3 January 1972 Detailed K-Ar and palaeomagnetic...palaeomagnetic measurements on sequences of basalts from Norfolk Island indicate that the boundary between the Gauss...and 2.45 my. Statistical analysis of all the Norfolk Island age-polarity data yields an age of 2.41 ± 0...realistic in terms of the geology. Data from Norfolk Island and elsewhere combined with information from... 170 o 160" ,,so ° J ~ NEW I• f NEPEAN ISLAND 0 CALEDON • 20~ PA CIFIC SOUTH 29o05 _ |  | Mortimer, N., Patriat, M., Gans, P. B., Agranier, A., Chazot, G., Collot, J., Crundwell, M. P., Durance, P. M. J., Campbell, H. J., Etienne, S. (2021) The Norfolk Ridge seamounts: Eocene–Miocene volcanoes near Zealandia’s rifted continental margin. Australian Journal of Earth Sciences, 68 (3) 368-380 doi:10.1080/08120099.2020.1805007 | Journal (article/letter/editorial) | | Geoscience Journal of the Geological Society of Australia ISSN: (Print) (Online) Journal homepage: https://www...https://www.tandfonline.com/loi/taje20 The Norfolk Ridge seamounts: Eocene–Miocene volcanoes near Zealandia’s...Durance , H. J. Campbell & S. Etienne (2020): The Norfolk Ridge seamounts: Eocene–Miocene volcanoes near...https://doi.org/10.1080/08120099.2020.1805007 The Norfolk Ridge seamounts: Eocene–Miocene volcanoes near...seamount volcanoes along the western side of the Norfolk Ridge between New Caledonia and New Zealand. Altered |  | | Report (chapter) | | Earth Sciences, University of Tasmania, Hobart, Australia 4 Department of Geology, University of Otago...School of Geosciences, University of Sydney, Australia 6 School of Earth, Atmosphere and Environment...Environment, Monash University, Melbourne, Australia 7 GNS Science, Lower Hutt, New Zealand 8 School of Geography...Wellington, New Zealand 9 Santos Ltd., Adelaide, Australia 10 Service Geologique de Nouvelle Calédonie...Nouméa, New Caledonia 11 Geoscience Australia, Canberra, Australia *Correspondence: n.mortimer@gns.cri |  | | Journal (issue) | | PETROLOGY OF LORD HOWE ISLAND, PART i THE YOUNGER : VOLCANICS p. M. GAME BULLETIN OF THE BRITISH...LONDON : 1970 PART I PETROLOGY OF LORD HOWE ISLAND THE YOUNGER VOLCANICS : BY MALCOLM GAME PHILIP... Price £2 5s. (£2.25) PETROLOGY OF LORD HOWE ISLAND PART I THE YOUNGER VOLCANICS : Bv P. M. GAME...and the younger DYKES (a) Plagioclase (6) Order-disorder in plagioclase phenocrysts Pyroxenes id)...older series VII. Ball's Pyramid VIII. Age of the island and distance from ridge crest . IX. Summary |  | | Journal (article/letter/editorial) | | mineral species, associated with orthoclase and plagioclase felspars, green hornblende, mica, etc.; glauconite...especially the vitreous varieties, sanadine, plagioclase, augite, hornblende, rhombic pyroxenes, olivine...the minerals found in pumice, like sanadine, plagioclase, augite, hornblende, magnetite, etc., are also...Philippines, Gilolo, New Guinea, and the east coast of Australia; on the east by the coasts of North and South...Kermadecs, Norfolk island, and New Caledonia. Another isolated area lies off the east coast of Australia, and |  | | Report (issue) | | _ Hawaiian Islands___________________________ Norfolk Island_______________________ Lismore, New South...compared are from the Hawaiian Islands, Norfolk Island, Australia, and Northern Ireland. The clay minerals...of tropical weathering and soil formation. The island consists of volcanic rocks (largely andesitic in...formation. The mountainous central core of the island consists of the Alutom Formation, a succession...Oligocene Foraminifera. The southern third of the island is a succession of eastwarddipping volcanic rocks |  | | Journal (article/letter/editorial) | | dacite, unusually low in K2O and with very calcic plagioclase. It is apparently identical to pumice washed...LABORATORY METHODS Fragments of pumice glass and of plagioclase and pyroxene separated from the pumice were examined...that it was derived from some point outside the island group. The exact date of arrival is not known....appearance. Small crystalline aggregates of plagioclase and pyroxene 1 to 2 mm in diameter are sparsely...opaque dust. There are scattered crystals of plagioclase showing traces of oscillatory zoning, and extinction |  | Price, R.C., Gray, C.M., Wilson, R.E., Frey, F.A., Taylor, S.R. (1991) The effects of weathering on rare-earth element, Y and Ba abundances in Tertiary basalts from southeastern Australia. Chemical Geology, 93 (3) 245-265 doi:10.1016/0009-2541(91)90117-a | Journal (article/letter/editorial) | | abundances in Tertiary basalts from southeastern Australia R.C. Price a, C.M. Gray a, R.E. Wilson a'", F...Department, La Trobe University, Bundoora, Vic. 3083, Australia "Department cd'Earth, Atmospheric and Planetary...University, GPO Box 4, Canberra, A. C. T. 2601, Australia ( Received September 13, 1990; revised and accepted...abundances in Tertiary basalts from southeastern Australia. Chem. Geol., 93: 245-265. Tholeiitic basalts...alteration has progressed to the point where plagioclase begins to break down. The study illustrates that |  | | Journal (article/letter/editorial) | | Macquarie University, North Ryde, N.S. W. 2113 (Australia) (Revised version accepted January 15, 1981) ...controlling REE distribution in some magmas. For example, island arc high-Mg, low-Ca-Ti tholeiites with low REE...The anomalous Y, REE-enriched tholeiites of Norfolk Island appear to be examples of this type of process... and unpublished). Abbreviations used: PL = plagioclase, AM = a m p h i b o l e , G A = garnet, ZO =...REE patterns for high-Mg andesites from a young island-arc province (interpreted from Hickey and Frey |  | Green, T.H., Sie, S.H., Ryan, C.G., Cousens, D.R. (1989) Proton microprobe-determined partitioning of Nb, Ta, Zr, Sr and Y between garnet, clinopyroxene and basaltic magma at high pressure and temperature. Chemical Geology, 74 (3) 201-216 doi:10.1016/0009-2541(89)90032-6 | Journal (article/letter/editorial) | | 2109 (Australia) 2CSIRO Division of Exploration Geoscience, North Ryde, N.S. W. 2113 (Australia) (Received...e r i m e n t a l A tholeiitic basalt from Norfolk Island (southwest Pacific Ocean) was artificially...and Y at natural abundance levels. The Nortblk Island basalt and a second natural rock, a basaltic andesite...28 17 I -- tholeiitic basalt ( T B ) from Norfolk Island (NF- 75: T.H. Green, 1973, 1978); 2 = basaltic...tholeiites to olivine melilitites from southeastern Australia utilizinggeochemical and experimental petrological |  | | Journal (article/letter/editorial) | | c t i o n a t i o n of olivine and possibly plagioclase and clinopyroxene during ascent to the surface...group AAn U 2 0 Ab 80 Fij;ure 3. Normative plagioclase composition An versus normative ne and hy. Shaded...differentiation products such as the rhyolites of Easter Island, whereas those of tholeiitic character yield quartz...intergranular to intersertal groundmass is composed of plagioclase, dinopyroxene, olivine, titaniferous magnetite...been expected to occur at least as rims on the plagioclase microlites. Apparently, the silica activity was |  | | Journal (article/letter/editorial) | | Maequarie University, North R yde, N.S.W. 2113 (Australia) Received July 24, 1978 Revised version received...low-Ti magmas formed in continental margins and island arcs. 1. Introduction Recent attempts at geochemical...the Andes [1 ]) or of subducted oceanic crust in island arc regions [2] have discussed the possible major...formed at pressures higher than the stability of plagioclase. Sphene has also been noted as a widespread accessory...Alps, Andes), or in subducted oceanic crust of island arcs and Andean-type continental margins. This |  | | Journal (article/letter/editorial) | | et al.) 14 1 70 Basalt, K/Ar, Alaska, Nunivak Island (Cox, Allan, et al.) 3 2 173 Basalt, K/Ar, Cretaceous...Basalt, K/Ar, Pliocene, Pacific Ocean, Norfolk Island, Philip Island (McDougall, lan, et al.) 14 3 367 Basalt...Paleozoic, Cretaceous, Antarctica, Argentina, Australia, Africa (Halpern, M.) 5 3 159 Granite, Pb/Pb,...dacite, rhyolite, whole rock, K/Ar, data, volcanism, island arcs, Tertiary, West Indies, Lesser Antilles, Limestone...rocks, dacite, minerals, biotite, Ar/Ar, data, island arcs, evolution, plate tectonics, upper Tertiary |  | | Journal (article/letter/editorial) | | Sciences, Macquarie UniÕersity, Sydney, NSW 2109, Australia b CETSEI, Department of Earth Sciences, UniÕersity...Australian National UniÕersity, Canberra, ACT 0200, Australia Abstract Trace element partition coefficients...important residual minerals in the derivation of ocean island and mid-ocean ridge basalts, and their relative...NSW ŽWass, 1980. and a quartz tholeiite from Norfolk Island ŽGreen, 1973, 1978.. Both compositions were...spinel lherzolite source Žwithout subsequent plagioclase fractionation. should show a strong positive |  | | Report (issue) | | found in all the formations that crop out on the island of complexes, on structural and stratigraphic evidence;...and (4) Guam. The mountainous central part of the island is under- comparison of thin-section attributes...the geologic column on Guam. The limestone of the island was formed as a series of reef the Eocene limestone...from several facies of The northern part of the island Is a limestone cap that rests unconformably on...cene and Pleistocene age. The southern part of the Island Is Secondary features of the limestones include: |  | | Report (chapter) | | data for mid-ocean ridge basalts (MORBs) and ocean island basalts (OIB) are used to formulate chemical systematics...processes responsible for development of ocean island basalt (OIB) source characteristics. (4) Document...wedge above a subduction zone. Studies of modern island arc basalts suggest that subduction of the oceanic...during sample preparation. Fractionation of Nb/Ta in island arc basalts due to residual titanates during magma...primitive mantle, N-type MORB, E-type MORB and ocean island basalts (OIB) Element C1 chondritea Primitive |  | | Book (volume) | | of Geology University of Melbourne Victoria, Australia New Zealand Oceanographic Institute Division...Resüurces Canberra, Australian Capital Territory Australia Department of Earth Sciences Faculty of Science.... . . . . . . . . . . . . . . . A. St. Matthew Island ................................... B. Pribiloflslands...................................... C. Nunivak Island ...................................... D. Yukon-Kuskokwim................................ IV. The Aleutian Island Are .................................. A. Physiography |  | | Report (issue) | | 27. 13. Plagioclase altered along fractures to weathering product 2e14. Zoned plagioclase altered to...3c 15. Plagioclase microlites altered to weathering product 4b in their cores16. Plagioclase altered...severely altered weathering rinds. Pyroxene and plagioclase have intermediate stabilities, which vary with...weathering. Many of the rocks examined contain plagioclase that has normal, reversed, or oscillatory zonation;...in less weathered portions of rocks than is plagioclase stage IV (product 4b). These mineral weathering |  | | Book | | Eu as, for example, between silicate melt and plagioclase feldspar. The general principle is as follows...composition. Drake (1975) did this experimentally for plagioclase feldspar in melts of basaltic and andesitic compositions...and the EuAl 2Si 20 8/EuAl 3 3 + ratio in the plagioclase are directly proportional to the SiOg2 +activity...Zircon (data from Nagasawa, 1 9 7 0 ) . (c) Plagioclase feldspar, (d) Clinopyroxene. Data for (c) and...experimental investigation of Eu distribution in plagioclase/liquid and clinopyroxene/ liquid pairs, using |  | | Report (issue) | | TABLES Page TABLE 1. Stratigraphic units on the island of Kauai .........._.. . ._.... ......... . _-_...iron to fire white or light gray occurs on the island but has not been used are not in sufficient quantities...vey. The littoral sedimentary processes on the island J. C. Hathaway and in two samples by E. J. D-vorwere...in Japan (Aomine and Wada, drill. 1962); on Norfolk Island (Hutton and Stephens, Several techniques were...preparing the 1956) ; and in New South Wales, Australia (Nicolls maps of the ferruginous bauxite and clay |  | | Report (issue) | | Jurassic-Cretaceous Rangitata orogenic belt, South Island, New Zealand, by C. J. D. Adams 1 Determination...inferred age of the lower crust in southeast Australia, by W. Compston and B. W. Chappell 55 Comparison...Schists, Haast Pass, Lakes Wanaka and Hawea, South Island, New Zealand, by J. E. 126 Gabites and C. J. D...Oxygen-isotope compositions in Archaean rocks from western Australia, with special reference to komatiites, by J. Hoefs...elements of the volcanic rocks from the Japanese Island Arcs, by Hajime Kurasawa 234 On the apparent |  | | Book (edition) | | Lanka. Sapphire also occurs there and in India, Australia and elsewhere. Corundum is also used as an abrasive...commonly accompanied by garnet, quartz and calcic plagioclase tera ta SILICATES Glaucophane, riebeckite...rocks, and as a product of the decomposition of plagioclase feldspar. It is named for Col. H. von Prehn,...grouped into the potassic feldspars and the plagioclase feldspars. In the plagioclases, Na and Ca can... KAISi3Ox and occurs in hydrothermal veins. Plagioclase NaAISisO3—CaAl2Si203 Crystal system Triclinic |  | | Book | | ........................................... 31 Island Collapse .............................................................. 45 2 Hawai'i, The Big Island .................................................83 and 99/H-2: Kailua-the North Shore-across the Island to Pearl Harbor ....... Hawai'i 930, Westward to...with a general discussion of the rocks of that island, then proceeds with a series of road guides that...chain of volcanoes extending westward from the Big Island to just past Kure Atoll, then north to the western |  | | Book | | sedimentary rocks in the Bay of Fundy. Paddys Island, NS Il THE LAST BILLION YEARS Table of Contents...to New Brunswick, Nova Scotia and Prince Edward Island. Generally, we visualize these provinces as bounded...INTRODUCTION Gulf of ai St Lawrence Prince Edward Island POM Geological highlights of the Maritime Provinces...loose, loamy soil, which renders Prince Edward Island one of the finest agricultural districts in the...opening scenes in the creation of a new volcanic island: Surtsey. Over the next few hours, the eruption |  | | Book | | USA 10 Stamford Road, Oakleigh, Melbourne 3166, Australia © Cambridge University Press 1990 First published...Americas 66 5 Antarctica 119 6 Asia 123 7 Australia 166 8 Europe 188 9 The Pacific Ocean basin...the idea only obtained grudging e.g. USA or Australia; third order - 1250 down to 125 acceptance when...Arizona in North America and at Wolf Creek, Western Australia. On the Moon, which lacks an atmosphere, these...only to be found later in South America, Africa, Australia and Antartica. Between Laurasia and aware of |
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