 | | Report (chapter) | | N-0316 Oslo, Norway 2 CEED, University of Oslo, Postbox 1048 Blindern, N-0316, Oslo, Norway 3 Geological...Geological Survey of Norway, Postboks 6315 Sluppen, 7491 Trondheim, Norway *Corresponding author (e-mail: fernando...Andersen et al. 1990), the discovery of high-pressure rocks in the higher allochthons (Stephens & van Roermund...Library on May 30, 2014 F. CORFU ET AL. of the Finnmark Caledonides, showing that the previously held...minerals coesite, diamond and majoritic garnets in rocks within the Western Gneiss Complex (WGC) demonstrated |  | | Journal (article/letter/editorial) | | Three varieties of alpine-type ultramafic rocks hi the Norwegian Caledonides and Basal Gneiss Complex... H. 1977: Three vaxi©~ties of alpine-type ultramafic rocks in the Norwegian Caledonides ~ ~ Basal Gneiss...0024--4937. Three varieties of all me- ~ype ultramafic rocks are distinguished in the Norwegian Caledonides...Caledonides and associated Basal Gneiss Complex. Type one rocks have primary (magrnatic) olivine, clinopyroxen¢...completely serpentinised. They are found exclusively in rocks of Cambro-Silurian age. Type two are polymetamorphic |  | | Journal (article/letter/editorial) | | com/locate/lithos Prograde garnet-bearing ultramafic rocks from the Tromsø Nappe, northern Scandinavian Caledonides☆...Ellingsen Department of Geology, University of Tromsø, N-9037 Norway Received 24 June 2005; accepted 30 March...Garnet-bearing peridotitic rocks closely associated with eclogite within the Tromsø Nappe of the northern...Matrix assemblage in the garnet-bearing peridotitic rocks is Hbl + Chl + Cpx + Ol ± Cr-rich spinel, defining...zoisite–chlorite rocks are presumably coeval with the matrix foliation of the peridotitic rocks. In dunitic |  | | Journal (issue) | | publishing channel of all scientific meetings held in Norway with a geological content. Editors: Hans Arne Nakrem...Norges Geologiske Undersøkelse N‐7491 Trondheim, Norway E‐mail: ngf@geologi.no www.geologi.no Published...Norges Geologiske Undersøkelse N‐7491 Trondheim, Norway E‐mail: ngf@geologi.no www.geologi.no NGF Abstracts...Abstracts and Proceedings Of the Geological Society of Norway Number 1, 2017 Vinterkonferansen 2017 Oslo, January...Petroleum Guri V. Ganerød, Geological Survey of Norway Dag Helland Hansen, Aker BP Jean Sebastien L’Herureuz |  | | Journal (article/letter/editorial) | | Carbonate-orthopyroxenites (sagvandites) from Troms, northern Norway W. S C H R E Y E R , W. O H N M A C H...Carbonate-orthopyroxeni~es (sagvandites) from Troms, northern Norway. Lithos 5, 345--64. Massive carbonate-orthopyroxenites...of the Caledonian mountain belt. Typical country rocks are garnet-kyanite-biotite gneisses, amphibolites...lime silicate marbles. Some of the pelitic country rocks exhibit water-deficient n'fineral assemblages, others...well as the high-grade metamorphism of the country rocks may have taken place under essentially the same |  | | Journal (article/letter/editorial) | | enites (Sagvandites) and related rocks from Troms, Northern Norway by W. OHNMACHT {Received 20 June...ites from Troms consist of enstatite and magnesite with variable amounts of olivine, talc, serpentine...millerite, and maucherite. Related rocks comprise olivine-magnesite-, talc-magnesite-, and olivine-orthopyroxene...equilibria. The gas-deficient assemblage enstatite+talc+forsterite+magnesite is presumed to be stable at...saxonite—v orthopyroxenite-*- sagvandite+related rocks. A simple geometric method is used to outline possible |  | | Book | | Centre for Geobiology University of Bergen Bergen Norway Responsible Series Editor: Y. Dilek ISSN 1876-1682 ...mainly of mafic-ultramafic lavas, calc-alkaline-felsic volcanic and volcaniclastic rocks, and sedimentary...boninites, adakites, Mg-andesites, high-pressure rocks, and ophiolites in some of the Archean greenstone...West of the Scandinavian Caledonides in Northern Norway: Architecture, Evolution and Possible Correlation...Geodynamic Significance of HornblendeBearing Ultramafic Rocks in the Mesoarchean Fiskenæsset Complex, SW |  | | Journal (article/letter/editorial) | | Springer-Verlag1990 A calculated petrogenetic grid for ultramafic rocks in the s y s t e m CaO - FeO - MgO - A1203...majority of phases encountered in metamorphosed ultramafic rocks. The changes in mineral compositions in terms...naturally-occurring greenschist and amphibolite facies ultramafic mineral assemblages. The correspondence of sequences...assemblages is very good. Introduction Alpine-type ultramafic rocks are present world-wide in a wide variety of...paper. Although the phases encountered in ultramafic rocks at low pressures are restricted to only a |  | | Journal (article/letter/editorial) | | structure and mineral composition of crusts on rocks from the Ronda peridotite, Spain, have been studied...Freiburg, Germany Introduction Green peridotite rocks are typically covered with brown weathering rinds...characteristic brown crusts help to recognize outcrops of ultramafic rock at the erosion surface from a long distance...from northern Norway and southern Spain (Fig. 1) show that these crusts cover ultramafic rocks in different...Rusty-colored weathering rinds occur on other types of rocks including gneiss and schists (Dixon et al. 2002) |  | | Report (issue) | | geologiske undersøkelse (Geological Survey of Norway) NO–7491 Norway All Rights reserved ISSN: 0801–5961 ISBN:...Dimension-stone deposits in larvikite, Oslo igneous province, Norway Tom Heldal, Idunn Kjølle, Gurli B. Meyer and Sven.............................. 19 Aggregates in Norway—Properties defining the quality of sand, gravel...geological parameters in the Fen region, southeast Norway Björn Henning Heincke, Mark Smethurst, Arne Bjørlykke...evaluation in the municipality of Gran, eastern Norway Mark A. Smethurst, Aud Venke Sundal, Terje Strand |  | | Journal (article/letter/editorial) | | HIGH-GRADE REGIONAL METAMORPHISM OF ULTRAMAFIC AND MAFIC ROCKS FROM THE ARCHAEAN SARGUR TERRANE, KARNATAKA... High-grade regional metamorphism of ultramafic and mafic rocks from the Archaean Sargur terrane, Karnataka...30: 189--219. Deformed and metamorphic ultramafic to mafic rocks emplaced into the Archaean Sargur supracrustal...intergranular fluids ( X c o ^ >1 0.5) in these rocks during metamorphism. The physical conditions of...methods of geothermobarometry to the recrystallized ultramafic assemblages with olivine, pyroxenes and spinel |  | | Journal (article/letter/editorial) | | Springer-Verlag 2012 Abstract Corundum megacryst-bearing rocks associated with the high-pressure migmatites of...megacrysts. Geochemically, the corundum-bearing rocks are enriched in Al, K, Rb and Ba and depleted in...Department of Geology, University of Tromsø, 9037 Tromsø, Norway e-mail: kare.kullerud@uit.no P. Nasipuri...Historic Museum, Box 11722, Blindern, 0318 Oslo, Norway e-mail: r.s.selbekk@nhm.uio.no Introduction Corundum...common mineral in a large variety of metamorphic rocks of aluminium-rich compositions. Dependent on the |  | | Journal (article/letter/editorial) | | for siliceous carbonate and carbonate ultramarie rocks at pressures o f a b o u t 2-5 kbar. The p r i m...provided by the existence o f the stable assemblage talc + dolomite + forsterite + tremolite + antigorite...thermodynamic data. F o r antigorite ophicarbonate rocks, remarkable agreement is obtained between the spatial...understanding the petrogenesis o f siliceous carbonate rocks. However, recent phase diagrams for parts of this...the TXco~ diagrams for o p h i c a r b o n a t e rocks from T r o m m s d o r f f and Evans (1977a) and |  | | Journal (article/letter/editorial) | | (post-Katanga) metamorphism of gabbros intruded into rocks of the Katanga System (Upper Proterozoic) occur...Province of Zambia. Typical constituents of these rocks are omphacite, almandine garnet with significant...eclogites associated with metagabbros and ultramafic rocks incorporated in metasediments of the K a t...specific high-pressure rock types derived from Katanga rocks during the Lufilian (post-Katanga) metamorphism...1965; Clifford, 1967, 1972) of folded and thrusted rocks of the Katanga System (Upper Proterozoic) lying |  | | Journal (article/letter/editorial) | | Petrogenesis of Ultramafic Metamorphic Rocks from the 3800 Ma Isua Supracrustal Belt, West Greenland...Based on mineral assemblage, we distinguish four ultramafic rock types at Isua: (1) Peridotite (olivine +...+ cummingtonite + Cr-magnetite); (3) Talc-Magnesite Schist (talc + magnesite ± antigorite + magnetite);...and (4) Serpentinite (antigorite 4- magnetite ± talc ± magnesite). Orthopyroxene-free peridotites occur...iron-formation assemblages; and retrograde metamorphism to talc-magnesite schist or serpentinite near ~450°C at |  | | Journal (article/letter/editorial) | | common accessory minerals of the Pechenga ultramafic rocks in NW Russia, varying in metamorphic grade...chrome–spinel phases in the amphibolite facies rocks. The continuous trend of the magmatic chrome–spinels...Low-temperature hydrothermal processes, in particular talc–carbonate alterations, could cause a local loss...minerals in ultramafic rocks and are often used as an indicator of the petrogenesis of these rocks ŽIrvine...reconstructions of strongly metamorphosed ultramafic rocks. The Pechenga greenstone belt hosts numerous |  | | Journal (article/letter/editorial) | | University of Oslo,P.O.Box1047,Blindern,N-0316Oslo,Norway PETERM. IHLEN, NorwegianGeological Survey,LeivEriksons...LeivEriksons vei 39, P.O.Box3006,Lade,N-7002Trondheim, Norway AND ARNEBJORLYKKE Departmentof Geology,Universityof...N-0316Oslo,Norway Abstract The HelgelandNappe Complexof the uppermostCaledonianallochthonsof Norway is hostto...involvingconvection of meteoricwaterandleachingof metals from the rocks in the brittle zone. This lead isotopesurveyof...and vei 39, P.O. Box3006, Lade,N-700•2Trondheim,Norway. Vik (1975) suggestedthat the major part of the |  | | Journal (article/letter/editorial) | | BRUECKNER’ 1Mineralogisk-Geologisk Museum, Oslo 5 (Norway) z Department of Earth and Environmental Sciences...gneisses. The Sr and Nd isotopic data suggest that the rocks studied here all had complex crustal histories prior...= 0.7034. The eclogite-forming event in western Norway was apparently part of the Caledonian continent-continent...became apparent that these high-pressure (high-P) rocks may carry important information on mega-tectonic...processes. In the Western Gneiss Region (WGR) of Norway, eclogites occur in two general settings: (1) lenses |  | | Book | | Geologiske Unders@kelse, Box 3006, Trondheim 7001, Norway A. M. GooowrN Department of Geology, University...Geologiske Unders0kelse, Box 3006, Trondheim 7001, Norway J. SUTTON Department of Geology, Imperial College...and Associated Intrusive Rocks . Basic Rocks Ultrabasic Rocks Conglomeratic Rocks of Acid Volcanic Origin...2,800 m.y. Anorthosites and Associated Gabbroic Rocks Later Granitic Gneisses and Granitic Intrusions...Granites . Late Archaean Sediments and Volcanic- Rocks . Tectonic Development of the Archaean Craton Conclusions: |  | | Journal (article/letter/editorial) | | breccia ores. Barren intrusions and sulphide-free ultramafic lithologies of the ore-bearing intrusions, as...sulphides and PGE depletion in low-sulphur ultramafic rocks are consistent with a magmatic model, implying...by crustal sulphur from the host metasedimentary rocks. This contamination apparently occured during magma...shales. Metamorphic hydrothermal alteration of the rocks led to remobilisation of the sulphide ores. Au was...ores and redeposited as native gold in zones of talc-carbonate alteration and stringer sulphides. Sedimentary |  | | Journal (article/letter/editorial) | | contact alteration it might once have possessed. Such rocks have long been known as alpine-type peridotites...0): "In contrast to.other classes of metamorphic rocks, however, no detailed petro graphic data are available...only. 398 EVANS rocks deformed and metamorphosed in harmony with their host rocks, a class that we shall...metamorphic ultrabasic rocks may be estimated. We then examine ultramafic rocks in three contrasting meta...environments, and conClude with a look at some related rocks formed by mass transfer processes accompanying ultrabasic |  | | Journal (volume) | | Ni-Cu deposits in mafie and ullramafie imrusive rocks. Thc most imponant of the orebearing areas are:...Sweden, the historical nickel mines in southern Norway , and the Räna intrusion in the orwegian Caledonides...copper ores, intrusive rock s, mafic composition, ultramafic cOlllposition, Haltic Shield, Ca ledon ides,... Precambrian, USSR, Finland, Sweden, Norway REFERENCES: General reference: PAP UNEN, H . & GORBUNOV... Geological Survey of Norway, Leiv Eiriksons vei 39, N-7oo0 Trondheim, Norway Geological Survey of Sweden |  | | Journal (article/letter/editorial) | | data for various common minerals (i.e., enstatite, talc, anthophyllite, and chrysotile). We also present...Na-cjt from harzburgite that has been altered to talc and chrysotile is not expected to occur, except...and geothermal systems, but probably not from ultramafic rock already hydrated to serpentine. Keywords:...of locations, including altered ultramafic, mafic, and ocean floor rocks in the United States, Europe,...anthophyllite [Mg7Si8O22(OH)2], chrysotile [Mg3Si2O5(OH)4], talc [Mg3Si4O10(OH)2], or some combination of these minerals |  | | Journal (article/letter/editorial) | | ARTICLE Enigmatic nodule‐bearing rocks in the mafic to ultramafic Diana Mills pluton, Piedmont Province...Silurian Diana Mills pluton is a metamorphosed mafic–ultramafic body in the Piedmont Province of Virginia. Major...hornblendite. However, the most visually striking rocks, found at 4 locations, consist of tan‐weathering...to investigate the origin of these nodular rocks. All rocks show evidence of greenschist‐ facies metamorphism...rock types. Nodules are dominated by serpentine or talc (+magnetite ± chromite), and many show a thin (≤5 |  | | Journal (article/letter/editorial) | | infiltration in the high-grade Modum Complex, South Norway: evidence for age, source and REE mobility Ingrid...Mineralogisk-Geologisk Museum, Sarsgt. 1, N-0562 Oslo, Norway 2 Department of Earth Sciences, University of Leeds...metamorphic basement of the Modum Complex, South Norway, exhibits retrogradation and alteration due to...high-grade metamorphism. Two generations of albite-rich rocks have been recognized: (1) a fine-grained, foliated...mineral assemblage; albite + actinolite + chlorite _+ talc. The calcite veins/dykes represent a younger generation |
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