 | | Journal (article/letter/editorial) | | mudstone xenoliths with native iron from Disko, central West Greenland A.K. Pedersen a and J.G. Ronsbo 2 1...M e m b e r on Disko contain Ti oxides which are oxygen deficient relative to rutile. Ore microscopy...recorded a m o n g native iron bearing rocks from Disko. The extremely reducing conditions were met in rocks...than 10 bars. Introduction A n o m a l o u s '~rutile" has been described from several extraterrestrial...light) in mesosiderites and in some chondrites and rutile with greenish colour has been reported from iron |  | | Journal (article/letter/editorial) | | AI-Armalcolite and Native Iron in a Lava From Asuk, Disko, Central West Greenland Asger Ken Pedersen Geologisk Museum...enclosed in basalt in a native iron bearing lava from Disko is similar in chemistry, apart from volatile components...Tertiary carbonaceous shale sediments from West Greenland, believed to have been the major contaminant and...formation of the native iron in the volcanic rocks on Disko. The shale buchite has preserved original sedimentary...and completely recrystallized to aggregates of rutile and Al-armalcolite with up to 24 tool% AlzTiO 5 |  | | Journal (article/letter/editorial) | | Native Iron-Bearing Andesite at Asuk, Disko, Central West Greenland Asger Ken Pedersen* Research School...at the classical locality of Asuk (Fig. 1) on the north coast of Disko (Steenstrup, 1882). The sequence...gradation 1 Nicolau (1900) described a similar rock from Asuk as an andesite, and his nomenclature is continued...nomenclature of the native iron-bearing rocks from Disko will be discussed in a later paper 0010-7999/78/0067/0331/$02...o m Disko 332 Table 1. Chemical analyses of andesite and shale xenoliths from 5'3" ' ~ Asuk, northern |  | | Journal (article/letter/editorial) | | Volcanic Rocks with Native Iron from Disko, Central West Greenland A.K. Pedersen Geologisk Museum, fOster...to daci~ic lavas from the Maligfit Formation on Disko contain an early phenocryst assemblage of plagioclase...isobaric invariant assemblage (ilmenite-armalcolite-rutile-iron) and the 3 boundary univariant reactions in...ascent and solidification. Introduction The island of Disko is known for the largest and most varied occurrences...surface. Several iron-bearing volcanic rocks on Disko show evidence of a strong progressive reduction |  | | Journal (article/letter/editorial) | | of These Assemblages in Basalts from Ovifak, Greenland, and Biihl, Federal Republic of Germany Olaf Medenbach...Kassel (West Germany) and Ovifak on Disko Island (West Greenland). The typical assemblage of these xenoliths...near Kassel, West Germany, and Ovifak (Disko Island), West Greenland. The origin of these iron xenoliths...native-ironbearing acid volcanic rocks from the NW Disco island, approximately 100 km north of the classical Ovifak...and ilmenite 1. Ovifak, Disko Island, Greenland On the west coast of Greenland occurrences of native iron |  | | Journal (volume) | | VAASJOKI, On Basalt Rocks with Native Iron in Disko, West Greenland . . MAUNU HÄ.RME, A Zoned Skarn Dike in...other heavy minerals, such as jadeite, kyanite, rutile, and diamond, Eskola accepted the eclogite theory...2 ON BASALT ROCKS WITH NATIVE IR ON IN DISKO, WEST GREENLAND 1) BY O. VAASJOKI Department 0/ Geology...eharaeteristie of basalt roeks eontaining native iron in Disko island. The aBsoeiation of anorthositie eomponent with...formations in Disko area has been emphasized. A new analysis on iron basalt of Asuk area, Disko, has b een |  | | Journal (volume) | | VAASJOKI, On Basalt Rocks with Native Iron in Disko, West Greenland . . MAUNU HÄ.RME, A Zoned Skarn Dike in...other heavy minerals, such as jadeite, kyanite, rutile, and diamond, Eskola accepted the eclogite theory...2 ON BASALT ROCKS WITH NATIVE IR ON IN DISKO, WEST GREENLAND 1) BY O. VAASJOKI Department 0/ Geology...eharaeteristie of basalt roeks eontaining native iron in Disko island. The aBsoeiation of anorthositie eomponent with...formations in Disko area has been emphasized. A new analysis on iron basalt of Asuk area, Disko, has b een |  | | Journal (article/letter/editorial) | | pyrite and molybdenite, and others form rims on rutile, all in a matrix of quartz and barian microcline...corroded rockbridgeite on the 67-m level in the island Vulcano of the Lipari group, north of Sicily, Italy...mudstone xenoliths with native iron from Disko, central West Greenland. Contrib. Mineral. Petrol., 96,3546...carbonaceousmudstones that occur at Asuk on northern Disko, Greenland, in a strongly reduced andesite breccia...interrelated triclinic compounds derived from the rutile structure by a crystallographic shear plane parallel |  | | Journal (article/letter/editorial) | | basalts and magnesian andesites from Di ko, West Greenland by Asger Ken Pedersen KØBENHAVN 1985 Grønlands...kr.12O.00 Greenland. 1980 by J. M. Hurst. O. 139 Triassic Iithostratigraphy of ast Greenland between Scoresby...and faunas on the north coast of Ogssuaq, West Greenland. 1981 by Leifur A. Sfmonarson. D.kr. 160.00 o...graptolites from Washington Land, we tem orth Greenland. 1981 by M. Bjerreskov. D.kr. 11200 o. 143 Stratabound...mineralisation in the Permo-1iiassic af central Bast Greenland. 1982 by B. Thomassen, L. B. Oemmensen & H. K |  | Anovitz, Lawrence M., Treiman, Allan H., Essene, Eric J., Hemingway, Bruce S., Westrum, Edgar F., Wall, Victor J., Burriel, Ramón, Bohlen, Steven R. (1985) The heat-capacity of ilmenite and phase equilibria in the system Fe-T-O. Geochimica et Cosmochimica Acta, 49 (10) 2027-2040 doi:10.1016/0016-7037(85)90061-4 | Journal (article/letter/editorial) | | 1978) on the reaction (Fig. 2): Ilmenite = lron f Rutile f O2 FeTiO, = Fe + TiOz + I /20,. (8) The calculated...1969) on the reaction: Pseudobrookite = Hematite + Rutile FezTi05 = Fe203 + TiOz -14 (10) I / I -15...the reaction: Ferropseudobrookite = Ilmenite + Rutile FeTizO: = FeTiOz + TiOz. for the HM buffer as...down to iron, Fe~opseudobrookite = Ulv~spinel f Rutile 2FeTiz05 = FezTi04 + 3Ti02 FIG. 4. Phase relations...partition into ferropseudobrookite over ilmenite and rutile. This suggests that solid-solutions may stabilize |  | | Journal (issue) | | Narssarssuk, Greenland. Photo by R. Bode. TITLE PAGE: The most common mineral in Greenland: ice —making...up the typical Arctic icebergs, ubiquitous in Greenland waters; photo by B. L. Nielsen. This special...AMMASSALIK (ANGMAGSSALIK) GEOLOGICAL MAP OF GREENLAND NUUK (GODTHAB) PAAMIUT (FREDERIKSHAB) ARSUK...Paleozoic and Mesozoic North Greenland platform and fold belt East Greenland Caledonian fold belt P rote...Archaean i 500 km i i i i PREFACE Throughout Greenland there are many interesting mineral localities |  | | Journal (article/letter/editorial) | | In Pliocene times, economic concentrations of rutile, zircon and ilmenite formed as beach placer deposits...ilmenite-rich (40ÿ60%) but may also contain up to 30 to 40% rutile and zircon (Roy et al., 2000). These latter two...components besides ilmenite and chrome-spinel (rutile, zircon, aluminosilicates, etc.), which dilute...to separate the ilmenite and chromespinels from rutile, zircon and leucoxene. This 0ÿ11 kGauss fraction...leucoxene). Minor accessory phases (<5 ÿ6%) consisted of rutile (both primary and secondary), zircon, aluminosilicates |  | de Souza, Zorano Sérgio, Wang, Chao, Jin, Zhen-Min, Li, Jian-Wei, Yang, Junlong, Botelho, Nilson Francisquini, Viana, Rúbia Ribeiro, dos Santos, Larissa, Liu, Peng-Lei, Li, Wei (2019) Pyrometamorphic aureoles of Cretaceous sandstones and shales by Cenozoic basic intrusions, NE Brazil: Petrograhic, textural, chemical and experimental approaches. Lithos, 326. 90-109 doi:10.1016/j.lithos.2018.11.033 | Journal (article/letter/editorial) | | eruptions of active volcanoes on Ruapehu and White Island, New Zealand (Wood, 1994; Wood and Browne, 1996)...2003; Salvioli-Mariani et al., 2005), and El Hierro Island, the Canary Islands (Del Moro et al., 2015), were...fayalite, MA pyroxene, mullite, sanidine, ilmenite, rutile, Fe-cordierite (sekaninaite), anorthite, armalcolite...7e, f), as well as Fe-rich mullite, tridymite, rutile and hercynitic spinel (Table 2 and Supplementary...Fe-cordierite (sekaninaite), hercynitic spinel, rutile, pseudorutile, and tridymite (see below). Table |  | | Journal (article/letter/editorial) | | mineral series coexists with Mg-Cr-ilmenite, Nb-Cr-rutile, and Ca-Cr (NbZr) armalcolite that have equally...IO’ to 10’. Crichtonite, armalcolite, and Nb-Cr-rutile occupy a compositional range in TiOl contentsbridging...contentsbridging the gap between ilmenite and rutile, two minerals having a widespread distribution in kimberlites...and armalcolite is equivalent to Cr-geikielite + rutile in the system (FeMg)-Ti02-Cr203. This system contains...occurrence of ilmenite intergrowths in kmberlitic rutile results from decomposition of high pressure olPbO*-type |  | | Report (chapter) | | consisting of ilmenite, rutile and pseudorutile, partially mantled by rutile within ilmenite. The domain...ilmenite reaction coronae were developed around relict rutile in rock fragments of quartz eclogite from the Higashi-Akaishi...consisting of fine symplectites of either rutile + ilmenite or rutile + titanomagnetite, have also been reported...parallel ilmenite–rutile intergrowths and very fine aggregates of ilmenite, rutile, quartz and K-feldspar...Rundvågshetta. Intergrowths and aggregates of ilmenite and rutile indicate that, during retrograde metamorphism, |  | | Journal (article/letter/editorial) | | tourmaline, zircon, apatite, spinel, ilmenite, rutile, and graphite. A colourless glass occurs between...native iron-bearing andesite at Asuk, Disko, central-west Greenland. Contrib. Mineral. Petrol., 67, 331–334 |  | | Journal (issue) | | quantities of minerals have been sent home from Greenland. These minerals originate from different sources...material has naturally been collected in East Greenland by the numerous expeditions of later years, whereas...increase the size of the hook. As far as West Greenland is concerned, the geological conditions are rather...peninsulas of Svartenhuk and ugssuaq and the island of Disko, is built up of plateau basalt, several km...which chiefly occur in the southernmost part of Greenland. As elsewhere, the occurrences of minerals in |  | | Journal (article/letter/editorial) | | degree of oxidation is reached with exsolution of rutile from ilmenite and formation of titanhematite and... FIG. 14. Ilmenite, magnetite (o) analyses and rutile from xenoliths 181, 12, 142, and 11 plotted in...glass (black) showing with internal exsolution of rutile (dark grey) and marginal oxidation (lighter grey)...analyses and formulae* of magnetite, ilmenite and rutile, with calculated T °C-f 02 t values, from pelitic...calculated on the basis of Magnetite = 3, Ilmenite = 2, Rutile = 2 Cations per Formula unit. X' Mole fraction |  | | Journal (article/letter/editorial) | | birefringence and parallef extinction suggest they are rutile. The needles have their long axes oriented in three...Foundation through grant site at Asuk, Disko, central west Greenland. Contrib. PHY76-83685 (G.J.W.), the |  | | Book | | org/details/geologyofgreenla0000unse Geology of Greenland = ~ Geology of sreenland Arthur Escher ...Geological Survey of Greenland 1976 Copyright © The Geological Survey of Greenland, Available The from...DK-1350 Denmark or through ISBN 1976 Survey of Greenland 10 Copenhagen your bookseller 87-980404—0-5S... Fabrik A/S, Odense Preface Geology of Greenland aims to provide a concise modern account...geology. A large part of the exposed bedrock in Greenland is formed of Precambrian crystalline rocks with | | | Book | | org/details/geologyofgreenla0000unse Geology of Greenland ™~ i ~ j : . . — ; i ~ - : Arthur Escher...Geological Survey of Greenland 1976 Copyright © The Geological Survey of Greenland, Available from...from The Geological Survey of Greenland @Mster Voldgade 10 DK-1350 Copenhagen Denmark or through your bookseller...ae A/S, Odense 1976 Preface Geology of Greenland aims to provide a concise modern account of...geology. A large part of the exposed bedrock in Greenland is formed of Precambrian crystalline rocks with |  | | Journal (article/letter/editorial) | | 12(3) 209-219 aegirine Denmark lO(3) 193-204 Greenland, geochemistry 31(3-4) 207-225 Labrador 5(3) 217-225...Pacific Ocean, lava 20(2) 135- 151 aenigmatite Greenland, phase equilibria lO(4) 257-270 Afghanistan mineralogy...22(4) 275-285 Agnotozoic see Proterozoic agpaite Greenland geochemistry 12(4) 303-315; l3(2) 22l222 Precambrian...37(2-3) 181-197 amber mica see phlogopite Ambittle Island geochemistry 12(3) 173-186 amphibole group see...26(1-2) 135156 Greece, petrology 27(2) 79-93 Greenland magmas 20(5) 391-417 petrology lO( 1) 59-72 Iceland |  | | Book (volume) | | continent and even in the icefree fringes of Greenland; in fact, there is no state or province which...GEMSTONES RarRE AND UnusuaL GEMSTONES Chrysoberyl, Rutile, Petalite, Pollucite, Phenakite, Axinite, Microlite...Mexican agate slice (color) . . . . . . . . X11 Rutile group Phenakite crystal Phenakite crystal group...like in its younger days. Other minerals such as rutile and tourmaline may be trapped in quartz also, providing...little as 0.004 in apatite to as much as 0.280 in rutile; in Fig. 4 the large amount of image doubling is |  | | Book | | Grænsesø Spherule Layer (Paleoproterozoic, South Greenland) . . . 7.4.1 Introduction . . . . . . . . . .... . . . . . . . . . . . . . . . The Grænsesø (Greenland) Spherule/Ejecta Layer . The Early Paleoproterozoic...S1 spherulea S3 spherule S4 spherule Nuussuaq (Disko) spherule Dales Gorge spheruleb Bee Gorge (Wittenoom)...South Africa South Africa South Africa Western Greenland Lowe et al. Lowe et al. Lowe et al. Margolis...Simonson and Hassler (1997) Western Australia South Greenland Bristol area, SW England Simonson et al. (2000a) |  | | Journal (issue) | | Ores, Minerals, Residues and Structural Steel, Rutile and Zircon Sands I II 2 METAL EXCHANGE LONDON...associations and, to a smaller extent, with those of island arcs. 1 Department of Geology, University of New...and 9°10 1 S (Fig. 11). New Georgia, the largest island, occupies a roughly central position with the other...rocks showing affinities with both mid-ocean and island-arc • • associations. It is the purpose of this...and Tetipari. They are also prominent on Baruku Island, which lies between the New Georgia group of islands |
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