 | | Journal (article/letter/editorial) | | Canberro, A.C.7., Auslrolia. ABSTRACT At Red Hill in southern Tasmania a large near vertical dike-like intrusion...ferrohedenbergite. a and ferroaugites augite, tt'o pigeonite and existing complete lractionation series a number...chilled contacts of the intrusion, but elservhere pigeonite is the only Ca-poor pyroxeile preient. Pigeonitb...crystallizes in cotectic equilibrium rvith the pigeonite and ciuring fractionation both pyroxenes |ecome...Mg. i\t the limit of the tv'o pyroxene field pigeonite ceases to form liut the Ca-rich pyroxene continues |  | | Corporate Document (Series) | | A Catalogue of the Minerals of Tasmania Geological Survey Bulletin 73 by R. S. Bottrill and W. E. Baker...Baker Mineral Resources Tasmania Department of Infrastructure, Energy and Resources E>...rossi'oilittes PO Box 56 Rosny Park Tasmania 7018 Phone (03) 6233 8377 Fax (03) 6233 8338 Email info@mrt...gov.au First published in Australia in 2008 by Mineral Resources Tasmania Department of Infrastructure...Box 56, Rosny Park, Tasmania 7018 www.mrttas.gov.au ©Copyright State of Tasmania, 2008 All rights reserved |  | | Journal (article/letter/editorial) | | The University of Melbourne, Victoria 3010, Australia Istituto di Geoscienze e Georisorse, Consiglio...2013 Available online xxxx Keywords: Antarctica Tasmania Granophyres Tholeiite Ferrar a b s t r a c t...Promontory and Archambault Ridge) and Tasmania (e.g., the Red Hill intrusion and Mount Wellington sill)...andesite composition containing plagioclase, augite, pigeonite, and interstitial Fe–Ti oxides; b) rocks of andesitic...chemical convergence of subcalcic Fe-augite and Fe-pigeonite followed by more evolved rocks that preserve quartz-alkali |  | | Journal (article/letter/editorial) | | JdL-CMS, Curtin University, Perth, WA 6845, Australia. Abstract Geochronological techniques such as...different Large Igneous Provinces (LIPs) located in Australia. We show that pyroxene can provide meaningful...province found throughout the western half of Australia. These samples are composed of fine-medium to...outcropped throughout the island state of Tasmania, Australia (Figure 1). These two CFBs were targeted...Antarctica and in the Australian state of Tasmania. In Tasmania, intrusions of tholeiitic magmas are exposed |  | | Journal (article/letter/editorial) | | differentiation: an example from the Red Hill intrusion, S. Tasmania Paolo A. Sossi • John D. Foden • Galen...pairs from the classic, tholeiitic Red Hill sill in southern Tasmania. The intrusion exhibits a vertical...Sciences, University of Adelaide, Adelaide, SA 5000, Australia P. A. Sossi (&) Research School of Earth Sciences...Australian National University, Canberra, ACT 0200, Australia e-mail: paolo.sossi@anu.edu.au G. P. Halverson...nature of these processes. The Red Hill intrusion, southern Tasmania (Fig. 1), is ideal for this study |  | | Journal (article/letter/editorial) | | Brisbane and Casino, the Tweed Shield Volcano 1 (Hill, 1951; Stephenson, Stevens & Tweedale, 1960; McElroy...manifestations of Tertiary volcanic activity in eastern Australia, the volcanic rocks extending approximately 70...aspects of Tertiary volcanic activity in eastern Australia. 2. PETROGRAPHY Table I lists 16 analyses of...(Richards, 1916, p. 162). The rock from Observation Hill (anal. 11) is distinguished by the occurrence of...clinopyroxene (including pigeonite), in a groundmass with hypersthene, near-uniaxial pigeonite, andesine laths |  | | Journal (article/letter/editorial) | | fayalite, such as is exhibited by the Tasmanian Red Hill dolerite-granophyre suite, and (2) a quench trend...1963, Fig. 3), or the trend of pyroxenes in the Red Hill dolerite-granophyre mass (McDougall 1961, Fig...indicate normative diopside content of the lavas. The Red Hill dolerite-granophyresuite is indicated by squares...relatively large crystals mantled by a thin rim of pigeonite. The 1840 lava (1840b3, though it is normatively...over a range of compositions of hypersthene (or pigeonite) together with a lime-rich pyroxene, giving place |  | | Book (edition) | | National Library of Australia card number and ISBN 0 207 12278 4 Registered in Australia for transmission...transmission by post as a book PRINTED "ill we IN AUSTRALIA BY HALSTEAD PRESS, SYDNEY To DR W. R. BROWNE...edition of this book only rocks occurring in Australia were described, but in this edition a short chapter...that this brief survey of the igneous rocks of Australia may stimulate research into some of the minerals...are in the Department of Geology, University of Tasmania, and three ignimbrites and a crystal lithic tuff |  | | Journal (article/letter/editorial) | | Hornblende, andesine, quartz, and alkali feldspar Pigeonite, augite, and labradorite Orthopyroxene, augite...augite Micropegmatite, ferroaugite, and andesine Pigeonite, augite, and andesine the lower and central zones...coincides with the inversion of Orthopyroxene to pigeonite. The upper zone is composed of rocks in which...coincides with the inversion of Orthopyroxene to pigeonite. In the dyke, the boundary between the main and...and fayalite zones marks the disappearance of pigeonite and the appearance of fayalite as a primary phase |  | | Journal (article/letter/editorial) | | Australian National University Canberra, A.C.T., Australia (Received 12 October1964) Abstract-The elements...a differentiated tholeiitic dolerite sill from Tasmania. A multivariate statistical technique is employed...of Jurassic age are of widespread occurrence in Tasmania. EDWARDS (1942) has shown that these dolerites...studied by EDWARDS (1942) and TILLER (1959) ; in the Red Hill intrusion, differentiation has produced silicic...dolerites consists of equal proportions of augite and pigeonite ; the plagioclase of both regions is labradorite |  | | Journal (article/letter/editorial) | | analyses of augites contaminated with inverted pigeonite. A later detailed investigation (Brown, 1957)...with a calcium-poor pyroxene (orthopyroxene or pigeonite). For this reason, separation of some of the minerals...revealed the presence of exsolution lamellae of a pigeonite, presumably very iron-rich (Bown & Gay, 1960,...Gay (I960, p. 386) to contain exsolved '. . . pigeonite, whose composition is likely to lie close to ferrosilite'...enrichment towards augites in equilibrium with pigeonite, and then into the one-pyroxene field of ferroaugite |  | | Journal (article/letter/editorial) | | Australian National University, Canberra, A.C.T., Australia (Received29 Septenaber1965; in revieedfonn 2 Fehq...centml zone of highly matic norite transitionalto pigeonite dolerite above and below; the bulk composition...multiple intrusionat the time of formation. The pigeonite tholeiite sills were probably nearly homogeneousinitially...Mountain to the south of Turnagain Valley. (b) Pigeonite tholeiites (1) Peneplain sill, Kukri Hills (433...carry 8-9 per cent nornmtive silica, and the pigeonite tholeiites 10-12 per cent. The olivine tholeiite |  | | Report (issue) | | Bureau of Mineral Resources, Canberra City, Australia el= GEOLOGICAL OF AMERICA SOCIETY SPECIAL ... 35 38) 39 40 41 42 45 46 47 > PALISADES Pigeonite dolerite): SILL, NEW JERSEY s:-. 28 2 ke ee...fayalite granophyre, Union City Photomicrograph of pigeonite dolerite, internal chilled contact, Haverstraw...intrusion of tholeiite. Attempts to separate pigeonite from augite were abortive. Field Sampling Specimens...Jurassic dolerite cone sheets are not uncommon in Tasmania, where, it is believed, they serve as feeders |  | | Journal (article/letter/editorial) | | differentiated. The series orthopyroxenedolerite —>• pigeonite-dolerite —»• ferrodolerite -*• leucogranophyre...Hornblende-granophyres represent heteromorphs of late pigeonite-dolerites and early ferrodolerites. Differentiation...assemblage (Table 1). The orthopyroxene-dolerites and pigeonite-dolerites are analogous to the " diabasa ortopiroxenica"...ferroaugite sine, and micro- (+fayalite) Augite, pigeonite pigeonite and labradorite or andesine Chilled dolerite...exceeds 5 per cent of the mode. Pigeonite-dolerites.—In these rocks, pigeonite occurs in place of orthopyroxene |  | Hamilton, Warren, Hayes, P.T., Calvert, Ronald, Smith, V.C., Elmore, P.S.D., Barnett, P.R., Conklin, Nancy (1965) Diabase sheets of the Taylor Glacier region, Victoria Land, Antarctica, with sections on petrography and sections on chemistry. Professional Paper 456b. US Geological Survey doi:10.3133/pp456b | Report (issue) | | mostly calcic labradorite and sodic bytownite. Pigeonite, subcalcic augite, augite, and hypersthene are...those of Antarctica, are widespread in eastern Australia, southern and central Africa, peninsular India...C. McKelvey of the University of New England, Australia; Peter N. Webb of the Geological Survey of New...chiefly in east longitudes, south of New Zealand, Australia, the Indian Ocean, and Africa. East Antarctica... and similar relationships were recognized in Tasmania by Carey (1958b). These features are particularly |  | | Journal (article/letter/editorial) | | composition of as Ca21,5 by high in early pigeonite when the from cotectic are Fe28,3, are oharacterized...Phenocrystic 4 . Grondmass olivine‑bronzite‑pigeonite tholeiite, bronzite‑olivine‑ｐigeonite tholeiite...tholeiite, Kurohana‐yama. of lzumigadake, pigeonite, clinopyroxene, 3.古 same rock same 銅 as roclr...的 性 質 か ら,Skaergaard, 南 種 のFerrar, 137 Tasmania, Red Hill, の 貫 入 岩 体 で は 斜 方 輝 石 一 ビ ジ オ ン輝 石 転 移...Mg・oNivine→Bronzite→Pigeonite Augite― →Ferroaugite Mg・olivine→Broulzite→Pigeonite→ Ferropigeonitc Diopside→AUgite |  | | Book (volume) | | intrusion, east Greenland. Crossed polars x60. A. B. Pigeonite inverted to orthopyroxene with exsolved augite...pyroxene. Bushveld complex. Crossed polars x60. C. Pigeonite inverted to orthopyroxene with exsolved augite...Introduction 3 Magnesium-Iron Pyroxenes Orthopyroxenes Pigeonite 162 Calcium Pyroxenes Diopside-Hedenbergite...metal ions r < v (or r > v) the optic axial angle in red light is less than (or greater than) that in violet...Geological Society of Australia for diagram from Journal Geological Society of Australia; Geological Society |  | | Journal (article/letter/editorial) | | Pennsylvania (Hotz, 1953, table 4). 7. Average Red Hill, Tasmania chilled dolerite (McDougall, 1962, table...noteworthy. Criteria indicative of inversion from pigeonite (Poldervaart & Hess, 1951, p. 482) are totally...unusual fayalite ferrogabbro containing inverted pigeonite (FeT4) and primary orthopyroxene (Fe75). Downloaded... 113 Leucogabbro just below quartz monzonite on hill located between gabbroic rocks and meladiorite....orthopyroxene, whereas (001) lamellae exsolve as pigeonite, which may subsequently invert to orthopyroxene |  | | Journal (article/letter/editorial) | | and conclusions: i) Tholeiites contain augite, pigeonite, and bronzite; alkalic rocks contain salite, augite...in rock C-111 only. There, they are magnesian pigeonite mantled by augite. Groundmass pyroxene in each...ferroaugite compositions; minor amounts of groundmass pigeonite are present in all but one rock (C-111; Fig. 1)...particularly pronounced in rock C-121 (Fig. 2). Pigeonite tends to be lower in N%0, C%0 3, TiO~, and AlcOa...clear systematic relationship to iron content. In pigeonite, none of the oxides seem to depend systematically |  | | Book (volume) | | .... 92 Jadeite ......... 99 Augite.109 Pigeonite ......... 143 Omphacite ......... 154 Fassaite...Bxa acute bisectrix c (in association with A) red light (656 mp) hexagonal cell edge c cell edge...scale) Li mp (in association with A) lithium (red) light (671 mp) millimicron M.A. Mineralogical...metal ions r v) the optic axial angle in red light is less than (or greater than) that in violet...a diagram from Jap. Journ. Geol. Geogr.; McGraw-Hill Book Company, Inc., New York for a diagram from |  | | Journal (article/letter/editorial) | | magma: An example from the Padthaway Ridge, South Australia S.P. TurneP, J.D. Foden ~ and R.S. Morrison" "The...Adelaide. GPO Box 498. Adelaide. S.A.. 5001. Australia bGeological Survey. Department of Mine~ and Energ3"...Energ3". GPO Box 2655 Alwe Springs, N, T.. 5 750, Australia {Received May 27, 1991; revised and accepted January...magma: An example from the Pathaway Ridge, South Australia. Lithos, 28:151-179. Various petrogenetic schemes...vc,lcanics from the Padthaway Ridge in South Australia. Mineralogical, chemical and isotopic arguments |  | | Report (issue) | | electron microprobe analysis 13 Line scan across a pigeonite grain mantled by augite 14 2+ The variation of...The main sill consists of plagioclase; augite, pigeonite, hypersthene and subcalcic augite; magnetite-ulvospinel...augite and pigeonite. There are sporadic long lath-shaped phenocrysts with cores of pigeonite epitaxially...(1957) noted that in th e Skaergaard intrusion, pigeonite may occasionally grow on an adjacent augite so.... Those with 2V-y around 0 are recognised as pigeonite while the augites have ° 2V-y generally over 40 |  | | Report (issue) | | No. 7 Woolman, Government Printer, South Australia, 1983 REF 349.994, N668c Noble, R. A. Catalogue...Mineralogy—South Australia. |. Just, J. (Juri). Il. Johnson, J. E. (James Eric). Ill. South Australia. Dept. of...and Energy. IV. Title. (Series: Handbook (South Australia. Dept. of Mines and Energy); 7) 549.99423 ISSN...Keywords: Mineralogy/Catalogues/Minerals/South Australia. Issued under the authority of The Hon. R. G...of Mines and providing its source is acknowl- Hill zinc deposit: longest crystal is 9 mm. Frontispiece: |  | | Journal (article/letter/editorial) | | occur among the more differentiated basalts, pigeonite appears wholly absent from the UPLS. Compositional...boundary (cf. Deer et al., 1978, figs. 1 and 11). Pigeonite is the commoner Ca-poor clinopyroxene, with a...Fe-enrichment and terminating close to the intermediate pigeonite-subcalcic augite boundary (Fig. 3b). In the LPLS...indicate rapid quenching. Small prisms of augite, pigeonite (the latter generally enclosed within the augite)...augite, sometimes enclosing prismatic cores of pigeonite, olivine (normally iddingsitized), magnetite, |  | Connolly, Harold C., Zipfel, Jutta, Grossman, Jeffrey N., Folco, Luigi, Smith, Caroline, Jones, Rhian H., Righter, Kevin, Zolensky, Michael, Russell, Sara S., Benedix, Gretchen K., Yamaguchi, Akira, Cohen, Barbara A. (2006) The Meteoritical Bulletin, No. 90, 2006 September. Meteoritics & Planetary Science, 41 (9) 1383-1418 doi:10.1111/j.1945-5100.2006.tb00529.x | Journal (article/letter/editorial) | | hand specimen has an outer surface that is brown-red while the interior is darker. Petrography: Chondrules...The meteorite is mostly composed of olivine and pigeonite with minor orthopyroxene. The Px/(Px+Ol) ratio...CaO = 0.33; Cr2O3 = 0.64 [both wt%; n = 47]), pigeonite (En82.8Wo7.9; Cr2O3 = 0.99, Al2O3 = 0.57, MnO...(Fs27Wo31; FeO/MnO = 32.2) with rims of Fe-rich pigeonite (Fs55Wo18 to Fs85Wo13; FeO/MnO = 41.0–36.8). Plagioclase...fayalite+silica+hedenbergite occurs at the margins of pigeonite grains. Other symplectitic intergrowths of fayalite+silica |
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