 | | Journal (article/letter/editorial) | | Alkalic Rocks at Litchfield, Maine by DANIEL S. BARKER Department of Geology, University of Texas, Austin...INTRODUCTION Maine, has long been known as a locality for albite-rich nepheline syenite. Specimens of...of cancrinite, sodalite, nepheline, and lepidomelane from Litchfield are common in many reference collections...collections. Nepheline syenite, however, forms but a small part of the Litchfield alkalic pluton, and the...Clarke (1886) described the mineralogy of the nepheline syenite. Bayley (1892) presented petrographic and |  | | Journal (article/letter/editorial) | | B. PANTSHI AND H.F.J. THEART 27 The Red Syenite of the Pilanesberg Complex; a potential raw material...Geological Society of South Africa ABSTRACT The Red Syenite deposit on the farm Zandrivierspoort 210 JP, located...considered here as a potential source of nepheline syenite, a material that is used as a flux in the...alternative starting material, at a lower cost than nepheline syenite, is responsible for an unwillingness of potential...potential users to switch to nepheline syenite, despite its proven advantages. Extensive additional geological |  | | Journal (article/letter/editorial) | | 1965 THE MINERALOGICAL COMPOSITION OF SOME NEPHELINE ALTERATION PRODUCTS A. D. Encen, Department oJ...of variousiy labelled alteration products of nepheline, principally "hydronephelites" and "ranites,"...indicate no lines corresponding to the synthetic nepheline hydrates and it is concluded, both from experimental...used by Clarke (1886)for material from Litchfield, Maine, intimately admixed and derived from the alterationof...feldsparand was reported as a hydrous pseudomorphafter nepheline."Gieseckite" also occurs at Diana, Lewis Co., |  | | Journal (article/letter/editorial) | | variety of interesting petrographic types, such as syenite, alkalic granite, alkalic gabbro, lamprophyre,...mildly alkaline rocks are granite, quartz syenite, syenite, and lesser amounts of intermediate and mafic...Referencea 1 2 Litchfield, Maine Agamenticus, Maine Abbott Mountain, 'Maine Red Hill, N.H. Cannon Mountain...Mountain, N.H. Pine Moutain, N.H. Lebanon, Maine Tatnie Hills, Maine Ossipee Mountain, N.H. Mount Pawtuckaway...Ascutney, VI. Alfred, Maine Cape Neddick, Maine Merrymeeting, N.H. fleasant Mountain, Maine Barber Hill, VI |  | | Journal (article/letter/editorial) | | members, namely, mafic syenite, felsic syenite, nepheline syenite and perthite syenite. Fe-rich orthopyroxene...orthopyroxene rims on olivine in mafic syenite indicate iron-enrichment in the early stage of differentiation...alkali-norite, the plutonic equivalent of hawiite. Felsic syenite with both alkali-feldspars and plagioclase of oligoclase...as two-feldspar syenite, the plutonic equivalent of mugearite. Albitic rims on nepheline indicates subsolvus...petrogenetic link between alkali gabbros and nepheline syenites. Leelanandam (1998) also observed that |  | | Catalog/List | | New Hamp shire . 40 l\lassive, pale bluish-green; Maine, Connecticut or North Carolina .......................... .. .25 Cae.sium-bearing, white masses; Maine ...... ...... BIOTITE (acid potassium magnesium...Massive, yellow, with nepheline ; Ontario ............ In nepheline-syenite, lea n ; Maine ... ..............Prices on request Massive with columbite in albite; Maine ... .......... Massive in andalusite; Washington...; Arkansas. 1,4 ", 6 for 25c. ELAEOL ITE-See Nepheline ELLSWORTH ITE (hydrous titanoniobate and tantalate |  | | Journal (article/letter/editorial) | | chiefly granites, quartz-syenites, syenites, nepheline-syenites, essexites, diorites and gabbros, cut...forming apparently a transition to the augite-quartz-syenite. The quartz is often dark and smoky. The feldspars...Swampscott, was reported from several places in Maine and Massachusetts by Iddings and Cross," while Sears'...zone between them and the areas of augiteI have syenite and diorite is a belt of micrographic granite....composition between the granite proper and the augite-syenite, with a silica content of about 7o. Enclosures |  | | Book | | Geological Sciences Mineral Resources Division Nepheline —-Syenite and Phonolite HMSO 15s Od Digitized by...Natural Environment Research Council Contents Nepheline-Syenite and Phonolite Introduction Chemistry, Mineralogy...Mineralogy and Classification of Nepheline-Bearing Rocks Origin of Nepheline-Bearing Rocks Mining and Treatment...Economic Assessment of Nepheline-Syenite and Phonolite Occurrences Nepheline-Syenite and Phonolite in Commonwealth...Zambia Canada India Australia New Zealand Nepheline-Syenite and Phonolite in Foreign Countries Czechoslovakia |  | | Journal (article/letter/editorial) | | Chapman, Mapleton, and Castle Hill, Aroostook Co., Maine. The andesites are Paleozoic lava flows and breccias...sometimes found. Exhaustive analyses show that the Maine andesites agree with the types of their class. No...Occurrence of Nepheline Syenite in New Jersey. F. LESLIERANSOME. A m . 1.sei., 158, 417-426.-The syenite described...the relations of the syenite and trap, but the author considers that the syenite is to be regarded as...T h e syenite is of three varieties, nepheline syenite, hornblende syenite, and biotite syenite. In addition |  | | Journal (article/letter/editorial) | | Crystal Chemistry of Silica-Rich, Alkali-Deficient Nepheline W.A. Dollase and Warren M. Thomas Department of...90024, USA Abstract. Coarse crystals of an extremely silica-rich, potassium-deficient nepheline have...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...compositions along this join. Introduction The nepheline structure is based on a tridymite-like framework |  | | Journal (article/letter/editorial) | | by a committee consisting of Dr. Carl Francis, Maine Mineral and Gem Museum; Dr. Marian Lupulescu, New...and several enclaverich syenites, including nepheline syenite (Myers et al. 1984). The outer zone of the...made up of a discontinuous ring of nepheline syenite and syenite characterized by tabular K-feldspar... The core of the complex consists of pyroxene syenite and measures about 1.5 kilometers across. The core...by a second ring of nepheline syenite (Myers et al. 1984). Most of the nepheline syenites of these two |  | | Report (issue) | | kupletskite. Astrophyllite group. Occurrence: In nepheline syenites, alkali granites, and their pegmatites;...fenites and other metasomatized rocks; in nepheline syenite gneisses and paragneisses. Association: Albite...Albite, aegirine, arfvedsonite, nepheline, natrolite, zircon, biotite, leucophanite, eudialyte, catapleiite...Province. In the USA, in Colorado, at St. Peters Dome, near Pikes Peak, El Paso Co., and in Maine, near Biddeford |  | | Journal (article/letter/editorial) | | SUBSOLIDUS EVOLUTION OF GNEISSIC BIOTITE SYENITE AND NEPHELINE SYENITE, OTTER LAKE AREA, QUEBEC RALPH KRETZ§...biotite syenite (the Stag syenite) and one larger body (~2 km) of gneissic nepheline syenite (the Cawood...Cawood nepheline syenite) occur 60 km northwest of Ottawa in the Central Metasedimentary Belt (Grenville...Quebec) of the Canadian Precambrian Shield. The Stag syenite consists of K-feldspar, sodic plagioclase, biotite...terrestrial syenite. The Cawood nepheline syenite consists of K-feldspar, sodic plagioclase, nepheline (close |  | | Catalog/List | | (lithium aluminum fluophosphate) Cleavable mass, pure; Maine or S. Dakota . . . . . . . . . . . . . . . AMETHYST-See...metasilicate) Common Beryl l\lassil'e. pale bluish-green ; Maine or Connecticut . . . . . . . . .35 Massive, white;.... . . . . 1.00 Caesium-bearing, white masses ; Maine Aquamarine XI-prism, pale blue; Colorado. !" to...sodium, calcium and aluminum) Massive, yellow, in nepheline; Ontario ... . .... . ........ . . Cleavages,.... ... ........... .. . .... .20 In nepheline-syenite, lean; Maine .. ...... .. . ........ CANNEL COAL-See |  | | Journal (article/letter/editorial) | | Alkaline Rocks of the Red Hill Complex, New Hampshire, USA K.A. Foland i and Irving Friedman 2 1 Departmentof...Pennsylvania19104, USA 2 U.S. GeologicalSurvey,Denver Federal Center, Denver, Colorado 80225, USA Abstract....composed of apparently cogenetic syenites, nepheline-sodalite syenite, and granite. The ages and petrogenetic...separated minerals. Whole-rock samples from three syenite units are consistent with a single Rb-Sr isochron...However, Sr isotope data for two other units, nepheline syenite and granite, are not consistent with this |  | | Journal (article/letter/editorial) | | occurrences of narsarsukite; both are in nepheline syenite. . . "Micro yellow crystals of narsarsukite...southeast of the City. The 3M Company is mining the syenite for roofing granules. Reference to the quarry has...narsarsukite crystals in tiny cavities in the nepheline syenite in the Diamond Jo quarry. This quarry is located...required." Triphylite, Nevel quarry, Newry, Maine Maine Triphylite Among the many "classic" minerals...ite-Messel ite Fairfieldite, Nevel quarry, Newry, Maine. Continuing with Newry, the Nevel quarry has also |  | | Journal (article/letter/editorial) | | Mineral Equilibria in the System Nepheline-Alkali Feldspar-Plagioclase and their Petrological Significance...consideration of equilibrium conditions in the system nepheline-alkali feldspar-plagioclase-alkali chloride aqueous...the distribution of sodium components between nepheline and alkali feldspar; between plagioclase and alkali...alkali feldspar; and among plagioclase, nepheline, and alkali feldspar for the temperature range 400-1000°...the systems nepheline 4-alkali feldspar+plagioclase from various igneous massifs of nepheline syenites of |  | | Journal (article/letter/editorial) | | JOURNAL, VOL. 18, 53-75 (1983) Petrology of nepheline syenite gneiss from Amazonian Brazil G. R. Lowell...Geoldgicas, Belern. Pard 66.000, Brazil Nepheline syenite gneiss is exposed in three localities near...average WRb ratio identical to the average for nepheline syenites of the Khibina massif; (4) WRb ratios...generations each of sodic plagioclase, microcline, and nepheline. Some minor metasomatic chemical effects may be...formed by anatexis of metamorphosed igneous nepheline syenite or its volcanic equivalent. Regional metamorphism |  | | Book | | amphiboles'. The rocks included are, therefore, the nepheline syenites (phonolites) and ijolites (nephelinÂ...containing alkali pyroxene and/ or amphibole) syenite, quartz syenite and granite, to gether with peralkaline...instance, containing normative but not moda.l nepheline, are excluded. However, sometimes these rocks...rocks contain such a high proportion of normative nepheline that it must be present as an occult phase in...been added, and general terms such as neph eline syenite have been freely applied. However, the relatively |  | | Report (issue) | | ................ Aluminous Igneous Rocks Nepheline Syenite and Phonolite............................................................. 3. Maj or nepheline syenite and phonolite deposits in the conterminous........................................ 4. Nepheline syenite deposits in Ontario and Quebec Provinces,.................................. 5. Major nepheline syenite deposits in the U.S.S.R., Finland, and Norway...——————————————————Mineral composition of nepheline syenite ——————————————————————————————————————————— |  | | Report (issue) | | . . . . . . . . . . . . 56 CHAPTER VI. The nepheline and aaeociated alkali syenites (including corundum... . . . . . . . . . . . . . • • . . . . . Nepheline syenite.... . . . . . . . . . . . . . . . • . . •...craigmontite, and_congreaaite.... .. ......... Nepheline-11Yenite-pegmatite. . ... . ....... . .......... . . . . . . . . . . . . . . . . . Red alkali syenite (umptekite). . . . . . . • . . . . • • . . . ....• . . . . . . . . . . . . . . . . . . • 91 Nepheline, page 91; sodalite, page 93; cancrinite, page |  | | Journal (article/letter/editorial) | | their petrological significance. In the nepheline and sodalite syenite, biotite and annite occur as coarse...metamorphic crystals in marble xenoliths within the syenite and siderophyllite occurs as large crystals in...km from Oka just west of Montrral to the Qurbec-Maine border in the east (Fig. 1). The Mont Saint-Hilaire...rocks and an eastern half of peralkaline nepheline syenite and associated igneous breccia. Currie et...the Pain de Sucre suite which is composed of nepheline gabbro, diorite, and monzonite; and (3) the East |  | | Journal (article/letter/editorial) | | example, even though the biotite in rocks such as the Maine litchfieldite is known to be highly ferric, it is...possible for rocks like the Blue Mountain nepheline syenite which contains coexisting magnetite and ilmenite...the Litchfield area of Maine or in various parts of southern Ontario. The Maine litchfieldite has recently...syenites are composed of two alkali feldspars, nepheline (0-30 per cent) and smaller amounts of biotite...system studied. Titanium is not a component in the Maine litchfieldite, but it is in some of the Ontario |  | | Journal (article/letter/editorial) | | UNEXPECTED ELEMENTS IN THE STETTIN COMPLEX, WAUSAU SYENITE COMPLEX, MARATHON COUNTY, WISCONSIN. T. W. Buchholz1...Wausau Syenite Complex; it is composed of several intrusive phases including pyroxene syenite, nepheline...nepheline syenite, tabular syenite, amphibole syenite, and syenite aplite. During the past several decades...coupled plasma spectroscopy]); tainiolite in a syenite pegmatite from a farmer’s rock pile on the north...about 0.9 wt. % Li2O. Arfvedsonite, common in syenite pegmatites of the complex, typically contains about |  | | Journal (article/letter/editorial) | | continental rift settings, such as carbonatite and nepheline syenite magmas, have anomalously low Hf abundances...concentrates isolated from carbonatites, alkaline basal& nepheline syenites, and granitic pegmatites (e.g., MURALI...________--_-___ GRDU~7~~I(CAREONATITE "0 NEPHELINE SYENITE SMP\ES) CarDonatlte Sullivan Island, Ontario...Fr.a.75 ::: unpublished 1043 6. 86GDOl-A Nepheline Syenite Pegmatite Seiland Complex, Norway 0,Fr.a 531...Seiland Complex, Norway 0.Fr.a 531 WDOI-C Nepheline Syenite Pegmatite Seiland Complex, Norway 0.Fr.a 531 |
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