 | | Journal (article/letter/editorial) | | ceases to crystallize and a clinopyroxene-p (pigeonite) is found. Since clinopyroxer~e-c is the only...reduced, native iron.bearing basaks of Disko Island, west Greenland, described by Vaasjoki (1965) and Melson...3; Possible loci of auffite, 3 t3 CaSi03 % pigeonite, pyroxferroite, and liquid ....compositions derived...in equilibrium with pigeonite and liquid. B augite in equilibrium with pigeonite and pyroxferroite. C...with pigeonite and liquid. G pyroxferroite in equilibrium MgSiO 3 /.0 30 20 FeSiO 3 with pigeonite and |  | | Journal (article/letter/editorial) | | minerals occur as inclusions within olivine and pigeonite grains in five low-shock ureilites. The bulk compositions...silicate magma from which ureilite olivine and pigeonite crystallized. Because the metallic liquid was...Cr, and Si; apatite for P; pyrite for S; and Disko Island cohenite for C. A ZAF tion procedure was used...of ureilites). In ALH82 130 they also occur in pigeonite. The following description applies to the majority...of K.assel, Germany (IRMER, 1927) and Disko Island, Greenland (CLARKE and PEDERSON, 1976: GOODRICHand |  | TREIMAN, Allan H., LINDSTROM, David J., SCHWANDT, Craig S., FRANCHI, Ian A., MORGAN, Matthew L. (2002) A “mesosiderite” rock from northern Siberia, Russia: Not a meteorite. Meteoritics & Planetary Science, 37. doi:10.1111/j.1945-5100.2002.tb00898.x | Journal (article/letter/editorial) | | community, unlike similar metal-bearing basalts from Greenland (Goodrich and Bird, 1985; KlOck et al., 1986)...compositions (Table 1): olivine F042, FeO/MnO = 110; pigeonite TABLE 1. Silicate minerals of Putorana rock:...Fe/Mnt Ent Fst Wot Ans Average olivine Average pigeonite Average augite Average plagioclase Most calcic...olivine; PI, plagioclase; Px, pyroxene (exsolved pigeonite); Au, augite; and 11m, ilmenite. (a) Matrix. Rounded...olivine grains enclosed by (partially replaced by) pigeonite. Abundant augite adjoins anorthite. Open cracks |  | | Journal (article/letter/editorial) | | first discovered by Nordensheld on Disko Island in the west of Greenland and studied by Lorenzen in 1883...mackinawite (FeS1–x) Plagioclase, olivine, augite, pigeonite, orthopyroxene, micas: all with varying compositions...shreibersite in the Kitdlit mafic dyke of Disko Island (Greenland) (UlffMøller 1985), lunar rocks (Frondel...Wo30–46En36–44Fs20–47 augite and Wo8–12En51–43Fs37–47 pigeonite. Shreibersite from the Ozernaya mountain intrusion... in association with native iron from Disko Island (Greenland), in kimberlite and lamproite. In the traps |  | | 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 |  | | Journal (article/letter/editorial) | | graphite andesite volcano, Nuussuaq, central West Greenland Asger Ken Pedersen a,⁎, Lotte Melchior Larsen...Copenhagen K, Denmark Geological Survey of Denmark and Greenland, Øster Voldgade 10, DK 1350 Copenhagen K, Denmark...chemically similar subaerial lavas and breccias from Disko and Nuussuaq contain less graphite and more iron...Graphite; Volcano; Paleocene; Nuussuaq Basin; Greenland 1. Introduction ⁎ Corresponding author. Tel...Nuussuaq Basin in central West Greenland and in particular the island of Disko is known for its large and |  | | Journal (article/letter/editorial) | | compatible with protopyroxene, orthopyroxene, pigeonite and sub-calcic augite, and can contain up to 31...inclusions in an ironcarbon alloy from Disko Island, Greenland (Goodrich, 1984); in a syenitic intrusion...few experiments and a phase noted only in the Disko Island silicate inclusions (Goodrich, 1984). We determine...olivine of 0.02– 0.5 (Henderson 1968; Anderson and Greenland, 1969; Toplis et al., 1994a,b; Brunet and Chazot...pyroxenes, particularly the clinopyroxenes, such as pigeonite, which is stabilized by the addition of phosphorus |  | | Journal (article/letter/editorial) | | 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...Since the first major description of native iron on Disko by Nordenskj61d (1870) a large number of theories |  | | Journal (article/letter/editorial) | | Paleocene Picrites and Flood Basalts on Disko and Nuussuaq, West Greenland LOTTE M. LARSEN1* AND ASGER K. PEDERSEN2...PEDERSEN2 1 GEOLOGICAL SURVEY OF DENMARK AND GREENLAND (GEUS), STER VOLDGADE 10, DK-1350 COPENHAGEN...rift-related Paleocene volcanic succession in West Greenland comprises voluminous picrites (the Vaigat Formation)...stratigraphy for the c. 3 km combined succession on Disko and Nuussuaq has been established that provides...similar to the source for the E-type lavas on Baffin Island may be present in the earliest rocks. Melting took |  | Fagan, A.L., Neal, C.R., Simonetti, A., Donohue, P.H., O’Sullivan, K.M. (2013) Distinguishing between Apollo 14 impact melt and pristine mare basalt samples by geochemical and textural analyses of olivine. Geochimica et Cosmochimica Acta, 106. 429-445 doi:10.1016/j.gca.2012.12.032 | Journal (article/letter/editorial) | | three A-12 basalt suites (Ilmenite, Olivine, Pigeonite) and olivine-rich Apollo 17 (A-17) Type C basalt...Ilmenite basalt Pigeonite basalt Olivine basalt Olivine basalt Pigeonite basalt Pigeonite basalt Type C...OSB, and PSB are A-12 Ilmenite, Olivine, and Pigeonite suite basalts, respectively. Olivine crystals...pyroxene phenocrysts contain augite cores and pigeonite rims. In contrast, sample 12016 is equigranular...appear as complex intergrowths of augite and pigeonite with no apparent common zonation pattern. The |  | LORAND, Jean‐Pierre, BARRAT, Jean‐Alix, CHEVRIER, Vincent, SAUTTER, Violaine, PONT, Sylvain (2012) Metal‐saturated sulfide assemblages in NWA 2737: Evidence for impact‐related sulfur devolatilization in Martian meteorites. Meteoritics & Planetary Science, 47 (11) 1830-1841 doi:10.1111/maps.12015 | Journal (article/letter/editorial) | | minerals are augite (3.1 wt%), low-Ca pyroxene (opx-pigeonite), analbite glass (1.6 wt%; vitrified by shock)...euhedral daughter minerals are chromite, augite ⁄ pigeonite, olivine, and kaersutitic amphibole set up in...highly reduced terrestrial basalts from the Disko island (Greenland) (Pedersen 1979; see also Kullerud et al...sulphide bodies with native iron from Disko, central West Greenland. Contributions to Mineralogy and Petrology |  | | Journal (article/letter/editorial) | | iron- and graphite-bearing basalt from Disko Island, Greenland, as an analogue for ureilites. The sample...pyroxene, unexsolved pigeonite. In contrast, ALH82 130 contains 235% pyroxene-pigeonite with 3-4% unmixed...LEW85440 contains -45% orthopyroxene, rather than pigeonite, as its main pyroxene (TAKEDA, 1989). META contains...contains orthopyroxene, augite, and pigeonite, with as much as 37% otthopyroxene and 30% augite in some...of metallic iron-bearing volcanics from Disko Island, Greenland. Lunar Planet. Sci. XIX, 401-402. G~DRICH |  | | Journal (article/letter/editorial) | | 7, 1992 Abstract. The picritic lavas of Baffin Island represent one of the most primitive Phanerozoic...the two distinct magma types observed in Baffin Island. A model in which the mantle source is a mixture...magmas in the Baffin Bay picritic suite. The Baffin Island E-type lavas are less enriched in Sr, Y and Zr...intermediate between those of N-MORB and those of ocean island basalts (OIB). E-MORB is enriched in LREE and incompatible...which erupted during the separation of Greenland from Baffin Island at ~58 Ma (Clarke and Upton /971) have |  | | Report (issue) | | Moscow, 147 p. (V,Cr,Cu,Ni,Co) Anderson, A.T., Greenland, L.P. (1969) Phosphorous fractionation diagram...komatiite suites from Alexo, Ontario, and Gorgona Island, Colombia. Geochim. Cosmochim. Acta, 51, 2159-2169...dacites, and the olivine tholeiites of Niua Fo'ou Island, S.W. Pacific. Contrib. Mineral. Petrol., 58, 1-21...of the rhyolitic volcanic rocks, central North Island, New Zealand. Phenocryst data. Contrib. Mineral...shoshonitic and calc-alkaline rocks from Stromboli Island (Aeolian arc). Neues Jahrb. Mineral. Abhandl., |  | Goodrich, Cyrena Anne, Harlow, George E., Van Orman, James A., Sutton, Stephen R., Jercinovic, Michael J., Mikouchi, Takashi (2014) Petrology of chromite in ureilites: Deconvolution of primary oxidation states and secondary reduction processes. Geochimica et Cosmochimica Acta, 135. 126-169 doi:10.1016/j.gca.2014.02.028 | Journal (article/letter/editorial) | | classified as olivine–orthopyroxene or olivine–pigeonite. See EA-1. in pyx in pyx Severe Minor? Minor...Mainz) using 20 keV and 20 nA beam current. Disko Island cohenite was used as a standard for carbon,...24.1 0.5 6.5 0.4 100.4 78.7 13.2 [1] Pigeonite NWA 766 Pigeonite NWA 3109 Orthopyroxene EET 96328 Avg...05 0.1 0.1 0.04 0.06 0.02 0.2 0.1 Pigeonite LAP 03587 Pigeonite CMS 04048 0.2 0.1 0.1 0.1 Opx LAP...1/3 augite. ** This pyroxene is structurally pigeonite (Weber et al., 2003), but is classified here as |  | | Journal (article/letter/editorial) | | finer-grained groundmasses consisting principally of pigeonite (⬃50% in SaU 005; ⬃60% in EET-A), plagioclase...basalts. (3) The CSD function for groundmass pigeonite in EET-A indicates continuous nucleation and growth...crystallization. This is supported by: (1) high pigeonite/plagioclase ratios; (2) low augite contents; and...olivine; Fo ⫽ forsterite; opx ⫽ orthopyroxene; pig ⫽ pigeonite; aug ⫽ augite; plag ⫽ plagioclase (maskelynite);...(Table 1), consist predominantly of clinopyroxene (pigeonite and augite) and plagioclase (now shock-produced |  | | Journal (article/letter/editorial) | | and associated high-silica intrusions, North Greenland: crustal melting, contamination and hydrothermal...the Zig-Zag Dal Basalt Formation, eastern North Greenland, represent a major Mesoproterozoic (1,380 Ma)...Kalsbeek (&) Geological Survey of Denmark and Greenland, Øster Voldgade 10, 1350 Copenhagen K, Denmark...the Independence Fjord Group in eastern North Greenland (around 81N) are cut by numerous mafic intrusions...1971). The stratigraphy in this part of North Greenland is summarised in Fig. 2. A crystalline basement |  | Pinto, Viter Magalhães, Massonne, Hans-Joachim, Wildner, Wilson, Hartmann, Léo Afraneo, Debruyne, David, Theye, Thomas (2019) Chemistry of chromium spinel in high-Mg rocks from the Morungava Intrusion, Cretaceous Paraná Igneous Province, southernmost Brazil. Mineralogy and Petrology, 113 (6) 765-782 doi:10.1007/s00710-019-00677-9 | Journal (article/letter/editorial) | | subprismatic clinopyroxenes (dominantly augite and pigeonite, 0.2–0.6 mm), commonly as oikocrysts containing...inclusions, and is associated with augite and pigeonite in oikocryst arrangements and with plagioclase...picrites from Qeqertarssuaq (Disko Island) and Nuussuaq, West Greenland with implications for the mineral |  | | 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 |  | | Book | | are: blue-grey = anorthite; brownish-orange = pigeonite; purplish = olivine (small; within anorthite)...plagioclase, the additional minerals are olivine and pigeonite, along The Rocks and Soils 27 Fig. 2-19. Microcraters...all types Mineral pyroxene; augite pyroxene; pigeonite pyroxene; hypersthene (Mg, Fe)2Si2Oa ' pyroxferroite...meteorite and lunar troilite are similar. AUGITE-PIGEONITE (THE PYROXENES) Members of the pyroxene group...subcalcic augite, ferroaugite, titanaugite and pigeonite. For this discussion it is only necessary to consider |  | | Book | | volcanic, nickel-iron from basalts in Disko Island, Greenland (from the writings of B0ggyld). Nevertheless...bring back three very large irons from Cape York, Greenland, and these may be seen in the American Museum...kg 27 tons 25-27 tons 20 tons The Cape York Greenland Irons (estimated) (estimated) (find of an iron...stones. Such surfaces are rounded and may show small island patches of crust, centred on projecting metal specks...Bronzite Chrondrites % NiFe 16-21 Ureilites (Olivine Pigeonite achondrites) OlivineHypershene Chondrites % N |  | Gao, Yongjun, Hoefs, Jochen, Hellebrand, Eric, von der Handt, Anette, Snow, Jonathan E. (2007) Trace element zoning in pyroxenes from ODP Hole 735B gabbros: diffusive exchange or synkinematic crystal fractionation?. Contributions to Mineralogy and Petrology, 153 (4) 429-442 doi:10.1007/s00410-006-0158-4 | Journal (article/letter/editorial) | | exsolution of low-Ca pyroxene (orthopyroxene or pigeonite) from high-Ca augite during subsolidus cooling...glass in a naturally reduced Basalt from Disko Island, Greenland. In: Proceedings of the 18th Lunar Planetary |  | | Journal (volume) | | sections represent the geosynclinal magmatism (island arch magmatism (?) in current usage) of the Svecofennian...Tapani Mutanen riched in Fe to the point where pigeonite crystallized in the upper Main Zone. Eventually...isomodal layers (e.g., mixed rock peridotite, pigeonite gabbro, magnetite gabbro) are informally called...plagioclase-pyroxene (clinopyroxene and inverted pigeonite) cumulate. Crossed nicols. Sample TM-74-29A. Bar...alkali-rich quartz gabbros containing inverted pigeonite, cumulus magnetite and, interestingly, solitary |  | | Journal (article/letter/editorial) | | plateau basalts of the Scoresby Sund region, East Greenland Lotte Melchior Larsen, W. Stuart Watt and Margrethe...plateau basalts of the Scoresby Sund region, East Greenland Lotte Melchior Larsen, W. Stuart Watt and Margrethe... Abstract The early Tertiary plateau basalts in East Greenland are situated on a continental margin and were...l7 ), plagioclase (to Ann>, augite (to FS62 ), pigeonite (F~6-50)' titanomagnetite and ilmenite. All rocks...Si-rich basalts have ratios up to 0.7079. The East Greenland basalts are 'initial rifting' basalts very similar |
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