 | | Journal (article/letter/editorial) | | Feldspars, Nephelines and Analcimes from the Square Top Intrusion, Nundle, N.S.W. by J. F. G. WILKINSON Department...Department of Geology, University of New England, Armidale SN, New South Wales INTRODUCTION generally not comparable...The Square Top intrusion, approximately 250-300 feet thick, is located 2 miles west of Nundle, New South...South Wales, and reveals in its petrography and chemistry a continuous passage from analcime-olivine theralite...variants are confined to the lower third of the intrusion; felsic differentiates predominate, and alkali |  | | Journal (article/letter/editorial) | | from the differentiated Square Top intrusion, New South Wales, and in a New Zealand tinguaite vary significantly...significantly in Ne (nepheline), Ks (kalsilite) and Qz, even within individual samples, and they also...composional trend of successive "bulk" nepheline fractions in the Square Top sequence theralite--, tinguaite...Geology and Geophysics, University of New England, Armidale 2351, Australia H. D. Hensel Department of Geology...2601, Australia Editorial responsibility: R. A. Binns physical conditions attending nepheline crystallization |  | | Journal (article/letter/editorial) | | Volcanic Rocks from the East Otago Volcanic Province (New Zealand) and Related Rocks by D. s. COOMBS and j...variation in differentiation index and normative nepheline, indicate that the degree of undersaturation of...series from basanite through nepheline hawaiite, nepheline mugearite, and nepheline benmoreite, to phonolite;...conditions and probably relatively high Po,. Certain nepheline trachyandesites from East Otago are described...te-tristanite-trachyte and sanidine basanite-nepheline trachyandesitenepheline tristanite-phonolite lineages |  | | Journal (article/letter/editorial) | | of Geology, University of New England, Armidale, New South Wales, Australia Received February 23, 1968...~nalcime tinguaite from the Dunedin Volcanic Complex, New Zealand - - have been investigated to obtain some...which the analcime crystallized in advance of the co-existing potassic phases or is the principal felsic...i a n t s in which a n a l c i m e a n d leucite co-exist. The analcime-rich l a v a s discussed herein...56 P~O 5 1.14 1,27 0.94 0.57 1.10 C1 . . . . 0.04 CO~ . . . . . . BaO 1.04 0.97 - 0.56 0.16 SrO 0.26 0 |  | | Journal (article/letter/editorial) | | Ph.D. Department of Geology, The University of New England, Armidale, N.S.W. [Taken as read 8 :November...the sub-solidus region in the system NaA1SiOa (nepheline)-NaA1SiaO s (albite)-H20, Saha found analcime... 5 Mol. Ratio SiO 2 6 (Ab) Fio. 1. The Square Top and other analeimes, showingtheir relation to...content of synthetic and natural analcimes. 9 Square Top; O Yoder and Weir, 1960. As a comparatively minor...possesses a lower t e m perature stability field than nepheline under low to moderate water vapour pressures, |  | | Journal (article/letter/editorial) | | 1061 Clinopyroxenes from the Square Top intrusion, Nundle, New South Wales By J. F. G. WILKINSON,M.Sc....Department of Geology, University of New England, Armidale, New South Wales [Taken as read 3 November 1966]...analcime-tinguaite, clinopyroxene phenocrysts in the Square Top intrusion show limited compositional variation. The...ratios increased during differentiation. H E Square Top intrusion, a small plug-like mass with an exposed...miles west of Nundle, New South Wales, reveals the transition from base to top of analcime-olivine theralite |  | | Book (edition) | | INCLUDING MATERIAL FROM THE TERRITORY OF PAPUA AND NEW GUINEA GERMAINE A. JOPLIN, B.A., PH.D., D.Sc. ...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...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 |  | | Journal (article/letter/editorial) | | glasses from some alkali basaltic lavas ,from New South Wales By J. F. G. WILKINSOn, M.Sc., PH.D. Department...Department of Geology, The University of New England, Armidale, New South Wales [Taken as read 10 March 1966] ...and a nepheline-basanite) from the Central Volcanic Province of north-eastern New South Wales. This Province...developed mainly on the New England Tableland, where it extends as a belt from south of Armidale north to...rocks outcropping over an area greater than 2000 square miles. The analcimebasalt (olivine-analcimite) |  | | Journal (article/letter/editorial) | | June 2010, Vol. 74(3), pp. 415–432 Evolution of nepheline from mafic to highly differentiated members of...change in chemical composition trend of magmatic nepheline through magma evolution has been characterized...alkaline series of the Messum complex in which nepheline occurs in a succession of different mineral parageneses...strongly evolved felsic-rich rock types (nepheline syenites). The nepheline compositions are dependent on those...Although a slight increase in the silica content of nepheline is consistent with the experimentally defined |  | | Journal (article/letter/editorial) | | St. Hilaire occurs as a small funnel-shaped intrusion in the Monteregian petrographic province of Quebec...Quebec and consists of alkali gabbros and later nepheline syenites. Based on field relations, petrography...five types of gabbro are recognized. In order of intrusion these are: leucogabbro, foliated gabbro, kaersutite-biotite...differentiation 1. Introduction The Mt. St. Hilaire intrusion of Lower Cretaceous age occurs in the Monteregian...carbonatite to the Mt. Megantic gabbro-granite intrusion (Figure 1). Monteregian intrusions occur at the |  | | Journal (article/letter/editorial) | | mineral assemblage evolves by progressive addition of new minerals, occasionally with the replacement of an...quartz, plagioclase, orthoclase, leucite, and nepheline. The crystallization temperature of each mineral...that composition from the primary liquid yields a new liquid, which may be recycled to yield a sequence...trace progressive saturation in new minerals, substitution of a new mineral for an old mineral, and cessation...Augite Plagioclase Orthoclase Quartz Leucite Nepheline Abbreviation Mag Olv Hyp Aug Pla Ksp Qtz Leu |  | | Journal (article/letter/editorial) | | crinanites of Scotland, or the Square Top Intrusion, New South Wales (Wilkinson, 1965). The composition...Wyllie, at which the phases analcite, albite, nepheline, liquid, and vapour coexist. I 5 is at about 4-5-5...OCLC on March 13, 2015 In the albite-orthoclase-nepheline-kalsilite-water system the assemblage analcite-melt...°C (R) according to the reaction: analcite = nepheline+liquid. (c) The minimum melting point in the system...O " + nepheline II " + liquid • liquid + albite + ana/cite a .. O O •• + - ^nepheline FIG. |  | | Journal (article/letter/editorial) | | Crystal Chemistry of Silica-Rich, Alkali-Deficient Nepheline W.A. Dollase and Warren M. Thomas Department of...an extremely silica-rich, potassium-deficient nepheline have been synthesized hydrothermally with albite...248i9.76032. A crystal structure analysis of this nepheline has revealed (1) a disordered Si-A1 distribution...In addition, the crystal structure of another nepheline prepared by alkali exchange in molten NaC1 showed...the minor Ca component usually present. Thirteen new electron microprobe analyses of nephelines from a |  | | Journal (article/letter/editorial) | | Geology University of lqew England, Armidale, I~ew South Wales 2351 l~eceived November 10, 1969 Abstract. A...and by the final differentiate, chemically a nepheline syenite. During differentiation the pyroxenes...vapor pressure of 310bars, the temperature of intrusion was 985 ~ C. Final crystallization of the laccolith...u r l b u t a n d Griggs (1939) t h a t this intrusion, a t e x t b o o k e x a m p l e of d i f f e...i n d e p e n d e n t l y s a m p l e d t h e intrusion, in a r e p e t i t i o n of t h e coincidence |  | | Journal (article/letter/editorial) | | in diameter, as well as potassium feldspar and nepheline phenocrysts, are described. Electron microprobe...analc~me pheno- crysts (medium to dark grey) and nepheline phenoerysts (light grey) (B.M. 1929, 173(72))...i fig. lb. Analcime kenyte showing euhedral nepheline phenocrysts (pale to medium grey) and feldspars...analcime Iwith thin, white alteration rims), nepheline (white), i~nd feldspar (medium to dark grey, cracked)...number Analcime kenyte (Dixey number Analcime Nepheline Feldspar Magnetite 72 55 57 25.4 14.4 58.5 |  | | Journal (article/letter/editorial) | | however, can be used to demonstrate convincingly the co-existence of alkaline and calc-alkaline (or tholeiitic)...from:O Kungnat complex, South Greenland (Upton, 1960). © Tugtutoq complex, South Greenland-Part II (Upton...and 4, see also discussion below). 2. THE PROPOSED NEW PARAMETER A simple alkalinity ratio was devised to... 14.Andesite. 15.Monzonite. 16.Tinguaite. 17.Nepheline syenite. 18.Phonolite. ^.Calcalkaline trachyte...Wager et al, 1965), Nuanetsi (Cox et al, 1965), South Greenland (Upton, 1960; 1962; 1964; 1965), Nigeria |  | | Journal (article/letter/editorial) | | Gordon Butte (Crazy Mountains, Montana), agpaitic nepheline±syenite pegmatites intrude potassic alkaline rocks...rocks (principally, malignites and nepheline microsyenites). All pegmatite veins are composed predominantly...predominantly of potassium feldspar, nepheline, prismatic aegirine, barytolamprophyllite, wadeite, eudialyte...The nepheline contains low levels of SiO2 and elevated Fe contents. The compositions of nepheline cluster...association of sanidine with nearly stoichiometric nepheline is unusual for agpaitic rocks and probably re¯ects |  | | Book | | Congress Control Number: 2014947649 Springer New Delhi Heidelberg New York Dordrecht London © Springer India...in Chap. 6. Experimental studies on the system nepheline-kalsilite-SiO2 in air and under 1, 2, 3, 5, and...Chap. 9, phase relations in the system diopside–nepheline–sanidine studied in air and under 1, 2, 10, and...forsterite-diopside-leucite-akermanite and diopside-nepheline-leucite-akermanite under atmospheric pressure...Plenum Co of New York (Fig. 13.8a, b), Blackwell, Melbourne (Fig. 13.8a, b), Chapman and Hall Co., London |  | | Journal (article/letter/editorial) | | or as anhedral crystals in alkali basalts and nepheline basanites of the Hocheifel Area. Rimming of augite...benmoreites, and trachytes closely associated with nepheline basanites and ankaramites (Huckenholz, 1965 a)...xenocrysts occur in alkali basalts, ankaramites, nepheline basanites, and hawaiites. Ultramafie rock fragments...corresponding host basalts (alkali basalts, ankaramites, nepheline hasanites, and hawafites) which consist of about...(henceforth augite 4), plagioclase, alkalifeldspar, nepheline, analcite, and titanomagnetite. The phenocrysts |  | | Journal (article/letter/editorial) | | Australian National University, Canberra, A.C.T., Australia SUMMARY. A number of minerals and residual glasses...resemblance between certain lavas on the south coast of New South Wales, the absarokite-shoshonite-banakite...and because many monzonites are associated with nepheline- and melanite-bearing rocks, with or without 9...association (Joplin, 1964, 1965). Monzonites found with nepheline- and melanite-bearing types, however, appear to...of the association are leucite-bearing and not nepheline- or melanite-bearing as formerly suggested. Like |  | | Journal (article/letter/editorial) | | metadolerites of the Petroi Metabasalt, the New England fold belt, Australia DEEPANKER ASTHANA* Department of...Geophysics, The University of Sydney, N.S.W. 2006, Australia Abstract Relict clinopyroxenes from metadolerites...KEVWORDS: clinopyroxenes, metadolerite, New England fold belt, Australia. Introduction THE classic works of...Creek, in the Upper Macleay District of New South Wales, Australia 1 (Fig. 1 of Asthana and Leitch, 1985)...Society 550 D. ASTHANA Belt', of the Southern New England Fold Belt. The geological evolution of the |  | | Journal (article/letter/editorial) | | Mineralogy and Petrology of Nepheline Syenites from the Coldwell Alkaline Complex, Ontario, Canada by... Canada P7B 5E1 WITH SEVEN PLATES ABSTRACT Nepheline natrolite syenites of Center 2 of the Coldwell...porphyroclastic to mosaic granuloblastic. The nepheline syenites are pyroxene-poor. Pyroxenes occur most...muscovite and thomsonite is characteristic. The nepheline syenites are considered to be a part of a cycle...during post-intrusive regional block faulting. The nepheline syenites were probably derived by extensive fractional |  | | Journal (article/letter/editorial) | | exceedingly silica-undersaturated, having both nepheline and calcium silicate in the norm. Augite crystals...occurrence Reference Theralite; Square Top Intrusion, New South Wales Teschenite, Black Jack Sill Groundmass...also be rimmed by kaersutite, e.g. in the Rhum intrusion (Donaldson, 1975). All these occurrences have |  | | Journal (article/letter/editorial) | | low-temperature alteration products ofleucite, nepheline,or other precursor minerals (Rock, 1977; Wilkinson...Basin Member, Morrison Formation, near San Ysidro, New Mexico; Turner-Peterson,1985;Hay, 1986). Each sample...glassesranging across the binary system NaAlSiO" (nepheline)-NaAlSiO, (albite). He demonstrated a systematic... Three analcimes from the SquareTop intrusion of New South Wales (Wilkinson, 1965) have significantly...1968);horizontally ruled field : three analcimes from the Square Top Intrusion (Wilkinson, 1965). Enor bar indicates uncertainties |  | | Journal (article/letter/editorial) | | 3% MgO, 2.5-4.4% K20, and 2.2 9.9% normative nepheline. All members of this basic alkalic suite contain...Volcfin Colima marks its present position, 5 km south of the Pleistocene volcano Nevado de Colima, and...Three major linear structures merge about 40 km south of Guadalajara in the western Mexican Volcanic Belt...Cretaceous. The intersection of these three structures south of Guadalajara appears to represent an incipient...basalts with both normative (> 5 %) and modal nepheline (Macdonald and Katsura 1964). The samples termed |
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