 | | Journal (article/letter/editorial) | | Contributions to Mineralogy and Petrology Contrib Mineral Petrol (1988) 99:113-125 9 Springer-Verlag1988... southeastern Nain igneous complex, Labrador* J.D. Hill** Geological Survey of Canada, 601 Booth Street...Street, Ottawa, Canada K1A OE8 Abstract. Fine grained gabbroic chilled margins and crosscutting dikes are...are associated in space and time with three ca. 1400 Ma anorthositic plutons in the Flowers River area...area, southeastern Nain igneous complex. Both the anorthositic and gabbroic rocks have distinctive compositions |  | | Journal (article/letter/editorial) | | of the Nain massif anorthosite, Labrador:Magma diversity in five intrusions SUIZHOU XUE* and S. A. MORSE...MORSE Department of Geology and Geogmphy, University of Massachusetts, Amherst, MA 01003, USA (Received...revisedform March 18, 1993) Abstract-The petrography and major- and tracc-element ~n~ntmtions of the ano~o~tic...Manvers Run (PMR) , and Kikkertavak area (KIK) in the Nain Plutonic Suite (NPS), Labrador, delineate the mineralogical...mineralogical and composition ranges of these large intrusions. From these, a variety of magmas and staging |  | Ashwal, Lewis D., Wiebe, Robert A., Wooden, Joseph L., Whitehouse, Martin J., Snyder, Donald (1992) Pre-Elsonian mafic magmatism in the Nain Igneous Complex, Labrador: the bridges layered intrusion. Precambrian Research, 56 (1) 73-87 doi:10.1016/0301-9268(92)90084-2 | Journal (article/letter/editorial) | | Pre-Elsonian mafic magmatism in the Nain igneous complex, Labrador: the Bridges layered intrusion Lewis...Wiebeb, Joseph L. Wooden¢, Martin J. Whitehousec' 1 and Donald Snydera aDepartment of Geology, Rand Afrikaans...2000, South Africa bDepartment of Geology, Franklin and Marshall College, Lancaster, PA 17604, USA cU.S....Menlo Park, CA 94025, USA aDepartment of Geology and Geophysics, University of California, Berkeley, CA... M.J. and Snyder, D., 1992. Pre-Elsonian mafic magmatism in the Nain igneous complex, Labrador: the Bridges |  | | Book | | Minerals and Rocks 21 Editor in Chief P. J. Wyllie, Pasadena, CA Editors A. El Goresy, Heidelberg W...Ashwal. p. cm. - (Minerals and rocks; 21) Includes bibliographical references and index.ISBN-13: 978-3-642-77442-3... reproduction on microfilm or in any other way, and storage in data banks. Duplication of this publication...Law of September 9, 1965, in its current version, and permission for use must always be obtained from Springer-Verlag...exempt from the relevant protective laws and regulations and therefore free for general use. Typesetting: |  | | Journal (article/letter/editorial) | | Cumulate Nodules in Proterozoic Dikes of the Nain Complex: Evidence for the Origin of Proterozoic Anorthosites...Anorthosites Department of Geology, Franklin and Marshall College, Lancaster, Pennsylvania 17604 (Received...typescript accepted I1 April 1986) ABSTRACT Nodules and xenocrysts dominated by high-A1 orthopyroxene occur...Proterozoic basaltic dikes that cut the Nain anorthosite complex, Labrador. This pyroxene (En,,-,,, AI,O, =...lacks exsolution and occurs both as anhedral xenocrysts up to 10 cm in diameter and with euhedral plagioclase |  | | Journal (article/letter/editorial) | | 64, 33- 52 (1977) Contributions to Mineralogy and Petrology 9 by Springer-Verlag 1977 Dry Granulite...Assemblages in the Contact Aureoles of the Nain Complex, Labrador Jonathan H. Berg Department of Geology...aureoles surrounding intrusions of the Nain complex, Labrador, contain many unique or unusual mineral...assemblages in aluminous gneisses and granulites, ironstones, and ultramafic rocks. Some of the limiting...Cd-Sp-Co-Si, Ga-O1-Hy-Sp, Ga-Cd-Hy-Sp, Hy-O1-QzAug, and O1-Hy-Sp ( + Chl _+Ca-amph +_Aug). On the basis of |  | | Journal (article/letter/editorial) | | liquids in the Nain comple6 Labrador R. A. Wrrnn Department of Geology, Franklin and Marshall College...AssrRAcr A variety of field evidencein the Nain complex of Labrador, supportedby petrography, geochemistry...geochemistry,new insights into the fluid dynamics of magmas,and models for the crystallization of basaltic magma...anorthositic dikes have hypidiomorphic textures and strongly zoned plagioclase that indicate liquids...stratigraphy developed partly through bottom accumulation and periodic replenishment. These liquids are too feldspathic |  | | Journal (article/letter/editorial) | | the Contact Aureoles of the Anorthositic Nain Complex, Labrador fry JONATHAN H. BERG* Department of Geology...1-4 Gyr anorthositic Nain complex was emplaced by multiple intrusion into Archean and Aphebian rocks whose...grades range regionally from greenschist to granulite and whose temperature at the time of emplacement was...than ~200300 °C. Using experimental data on Ga-Cd and Hy-Ol-Qz equilibria, compositional studies allow...the determination of contact metamorphic pressures and temperatures for samples over an area > 10,000 km2 |  | | Journal (article/letter/editorial) | | Fergtmon Press Ltd.Printed in U.S.A. + .oO Age and cooling history of the Kiglapait Intrusion from an...40Ar/39Ar study Department YANG Yu* and S. A. MORSE of Geology and Geography, University of Massachusetts...hornblende, biotite, and feldspar from the Kiglapait layered intrusion, Labrador, give closure ages that...the subsolidus cooling history of the intrusion and its surroundings. Biotites give very good plateaus...are typical for homblende, antiperthite, and plagioclase, and a spectrum of multi-plateau segments is |  | | Journal (article/letter/editorial) | | plagioclase and pyroxene megacrysts and their significance to the petrogenesis of the Nain anorthosites...anorthosites SUIZHOU XUE* and S. A. MORSE Department of Geology and Geography, University of Massachusetts, Amherst...of the Nain Plutonic Suite in Labrador are divided into a noritic, pale facies to the west and south,... and a troctolitic, dark facies to the east and north. Two large intrusions along Tikkoatokhakh Bay (TIK)...of the noritic suite, and massif anorthosites at Kikkertavak Island (KIK) and Port Manvers Run (PMR) |  | | Journal (article/letter/editorial) | | A,S. Fnlnr Lamont-Doherty Geological Observatory and Department of Geological Sciences,Columbia University...dike from the Nain Complex and an averagehigh-Al gabbro composition from the Harp Lake Complex. Experiments...the whole set of anorthositic dike compositions and may be causedby open-system crystallization. The...gabbro composition has plagioclase,orthopyroxene,and highCa pyroxenein its liquidus at 11.5 kbar. Ort...similar in major and minor element composition to the most aluminous orthopyroxene megacrysts,and liquidus |  | | Journal (article/letter/editorial) | | KATHLEENMNOLAN' andS. A.MoR~E Department of Geology and Geography, University of Massachusetts,Amherst,MA...Intrusion, Labrador,contains fine-grainedrocks 5-6 m above a contact with anorthositcof the Nain Complex, and...3 m from the contact Three Ihte-Imtined samples and one of the laminated unit have a mean composition...closely with the earlier estimates for alkali* Sr, and Y, thus they support the mineral/Iiquid partition...coe5cient.s previously calculated for these elements and for the rare earth elements. Based on new calctuations |  | | Journal (article/letter/editorial) | | Earth and Planetary Science Letters, 26 (1975) 331-336 © Elsevier Scientific Publishing Company, Amsterdam...PLAGIOCLASE LAMELLAE IN HYPERSTHENE, TIKKOATOKHAKH BAY, LABRADOR S.A. MORSE Department of Geology, University of...anorthosite along Tikkoatokhakh Bay, northwest of Nain, Labrador. Spongy intergrowths of plagioclase in hypersthene...lameUar segments of magnetite, and rarely by lamellae of olivine, augite, magnetite, or ilmenite. Some...hypersthene megacrysts are layered leuconorites and anorthosites with mean plagioclase compositions ranging |  | | Journal (article/letter/editorial) | | Kiglapait Geochemistry I: Systematics, Sampling, and Density ByS. A. MORSE Department of Geology/Geography...basaltic magma at 4 kbar and about 1250 °C, initial crystallization near the WM buffer, and fractionation to...from An67 to An10, olivine from Fo 69 to Fo0, and augite from En73 to En0. The specific gravity of the...the intrusion is 2-93, varying between 2-87 and 3-18 on smoothed models. Crystals accumulated chiefly at...side. The crystallization time was about 106 yr, and the average accumulation rate was about 1 cm/yr. |  | | Journal (article/letter/editorial) | | first major intrusion found to have all whole rock and calculated liquid d’*O values close to a normal uncontaminated...oxygen isotope exchange with its surrounding rocks and cooling of the magma was conductive. The &In0values...rock trend. The whole-rock data and the modelled i”‘O of the magma and cumulates rigorously demonstrate...cumulus phases such as magnetite and augite on the d”O of the liquid and rocks during fractional crystallization...modal variations among the mafic mineral phases and feldspar, keep the d’*O of the whole rocks constant |  | | Journal (article/letter/editorial) | | Contributions to Mineralogy and Petrology Contrib Mineral Petrol (1983) 84:327-344 9 Springer-Verlag...crystallization and magma mixing in the Tigalak layered intrusion, the Nain anorthosite complex, Labrador R.A. Wiebe...Wiebe 1 and T. Wild 2 t Department of Geology, Franklin and Marshall College, Lancaster, PA 17604, USA...mixtures of dioritic and granodioritic rocks occur widely in mappable lenses and layers that alternate...alternate up section and along the strike with more uniformly layered rocks. In these mixtures, chilled dioritic |  | | Journal (article/letter/editorial) | | Mountains Plur- W. Or,r,rr..q. Department of Geology and Geography,VassarCollege,Poughkeepsie,New York 12601...Jlrrn, Er.rzlnnrs B. J.q.rrn Department of Geology and Geography,University of Massachusetts,Amherst, Massachusetts01003...high-temperature inverted pigeonite lamellae in host augite and augite lamellae in host inverted pigeonite are locally...lamellae of augite in host pigeonite and pigeonite in host augite, (3) fautting of lamellae and then of host...orthopyroxene,and (5) decomposition of the lamellae to produce intergrowths ofaugite and orthopyroxene |  | | Journal (article/letter/editorial) | | AMONG THE PHASES OFTHE KIGLAPAIT INTRUSION, LABRADOR, CANADA RUTH I. KALAMARIDES Department of Geology...10,1985; Illinois University, DeKalb, revised and accepted IL 60115 January (U.S.A.) 21, 1986)...High-temperature oxygen isotope fractionation among Labrador, Canada. Chem. Geol. (Iaot. Geosci. Sect.), 58: 303-310...303-310. The fractionation of 6 ‘*O between liquid and temperature-corrected for the magma of the Kiglapait...6 I80 whole-rock mineral fractionation factors, and material balance. The fractionation Kiglapait system |  | | Journal (article/letter/editorial) | | Structural and Magmatic Evolution of a Magma Chamber: The Newark Island Layered Intrusion, Nain, Labrador by...by R. A. WIEBE Department of Geology, Franklin and Marshall College, P. 0. Box 3003, Lancaster, Pennsylvania...Intrusion occurs in the Proterozoic Nain anorthosite complex of Labrador. It contains an exceptional suite...cumulates ranging from troctolites and gabbros to quartz monzonites and intermediate hybrid rocks. These...that was periodically fed by a wide range of basic and acid magmas, the compositions of which are preserved |  | | Book | | Windley Further titles in this series 1. B.F. WINDLEY and S.M. NAQVl (Editors) Archaean Geochemistry 2. D.R...Formation 6. A.F. TRENDALL and R.C. MORRIS (Editors) Iron-Formation: Facts and Problems 7 . B. NAGY, R.... WEBER, J.C. GUERRERO and M. SCHIDLOWSKI (Editors) Developments and Interactions of the Precambrian Atmosphere...Atmosphere, Lithosphere and Biosphere 8. S.M. NAQVI (Editor) Precambrian Continental Crust and its Economic Resources...Resources 9. D.V. RUNDQVIST and F.P. MITROFANOV (Editors) Precambrian Geology of the USSR DEVELOPMENTS |  | | Journal (article/letter/editorial) | | Fractionation and Liquid Immiscibility in an Anorthositic Pluton of the Nain Complex, Labrador by R. A. WIEBE...WIEBE Department of Geology, Franklin and Marshall College, Lancaster, Pennsylvania 17604 (Received 17...An48. The dikes are nearly uniform in composition and similar to the estimated bulk composition of the...small body of granite (10 km2) was emplaced within and prior to the complete solidification of the leuconorite...intrusion caused local deformation of the leuconorite and filter-pressing of its late stage interstitial liquids |  | | Journal (article/letter/editorial) | | Contributions to Mineralogy and Petrology Contrib. Mineral. Petrol. 72, 339-351 (1980) 9 by Springer-Verlag...Troctolite in the Hettasch Intrusion, Labrador: Evidence for Magma-Mixing and Supercooling in a Plutonic Environment...leucotroctolites and include comb-layered plagioclase, skeletal megacrysts of plagioclase, and spherulitic...morphologies are set in a matrix of fine-grained, layered and unlayered melatroctolite. Because the mineral compositions...short distance below the texturally-defined SFT and a shorter distance above it, the mineral compositions |  | | Journal (article/letter/editorial) | | Contributions to Mineralogy and Petrology Contrib Mineral Petrol (1985) 90:226-235 9 Springer-Verlag1985...ferro-aluminous gneiss from the Nain complex Jonathan H. Berg a and Robert A. Wiebe Department of Geology...Illinois 60115, USA 2 Department of Geology, Franklin and Marshall College, Lancaster, Pennsylvania 17604,...contact between an anorthosite body and gneisses in the Nain complex, Labrador. One of these xenoliths is a...poikilitic grains of garnet and orthoamphibole. Biotite occurs as both granular and poikilitic grains. The |  | | Journal (article/letter/editorial) | | (1993) 113 : 59-72 Contributions to Mineralogy and Petrology © Springer-Verlag1993 Slow, dense replenishments...intrusion, Nain, Labrador R.A. Wiebe 1 and Don Snyder 2 . Department of Geosciences,Franklin and Marshall...posite layered intrusion within the Nain anorthosite complex, Labrador. The intrusion comprises a lower...dominated by troctolites, olivine gabbros and oxide-rich cumulates and an upper hybrid series (HS) characterized...characterized by a wide range ofmafic, granitic and hybrid cumulates and discontinuous layers of chilled mafic |  | | Journal (article/letter/editorial) | | August 2000) Abstract – The Skattøra migmatite complex in the north Norwegian Caledonides consists of...net-veined by numerous (up to 90%) anorthositic and leucodioritic dykes. The average chemical composition...CaO, 7.8% Na2O, 0.2% K2O. A migmatite leucosome and a dyke have been dated by the U/Pb method on titanite...connected to dykes, suggesting that melt segregated and left its source. Dyke thicknesses range from a few...(An20–50) is the dominant mineral (85–100%) in the dykes and the leucosome, but 0–15 % amphibole is generally |
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