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breunnerite

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Journal Article
Published: 01 August 1982
American Mineralogist (1982) 67 (7-8): 822–825.
...Ron Bogoch; Ludwig Halicz; Ya'acov Nathan Abstract Conspicuously coarse grained breunnerite occurs together with dolomite associated with albitite bodies in Wadi Tarr, Southeastern Sinai. From the chemical analyses, it is seen to contain about 8% FeO. The a cell dimension was found to be 4.64...
Image
F ig . 3. Backscattered electron (BSE) images, showing the replacement of F...
Published: 01 November 2003
at crystal scale. Breunnerite crystals exhibit a greater compositional homogeneity. Bre = breunnerite, Fe-r = iron-rich mixed carbonates, LD = late dolomite, Mg-r = magnesium-rich mixed carbonates.
Image
Carbonate mineral compositions in sample R.4735.1 (circles) relative to fie...
Published: 01 February 2000
F ig . 3. Carbonate mineral compositions in sample R.4735.1 (circles) relative to fields for calcite, dolomite-ankerite and breunnerite reported from lamprophyres (after Rock, 1987 , 1991 ).
Journal Article
Published: 01 January 2008
Reviews in Mineralogy and Geochemistry (2008) 68 (1): 429–462.
..., breunnerite, ferrous olivine, hedenbergite, wollastonite, grossular, monticellite, forsterite, andradite, nepheline, sodalite) ( Brearley 2003 , 2005 and references therein). Petrographic, mineralogic, oxygen and short-lived isotope systematics ( 26 Al- 26 Mg, 53 Mn- 53 Cr, 129 I- 129 Xe) suggest...
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Journal Article
Journal: Economic Geology
Published: 01 November 2003
Economic Geology (2003) 98 (7): 1413–1426.
... at crystal scale. Breunnerite crystals exhibit a greater compositional homogeneity. Bre = breunnerite, Fe-r = iron-rich mixed carbonates, LD = late dolomite, Mg-r = magnesium-rich mixed carbonates. ...
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Journal Article
Published: 01 December 1964
American Mineralogist (1964) 49 (11-12): 1730–1736.
...Bartholomew Nagy; Christian A. Andersen Abstract Electron probe microanalysis of petrographic thin sections of the Orgueil carbonaceous meteorite has led to the determination of the chemical composition of some mineral constituents. The presence of breunnerite, an iron-magnesium carbonate mineral...
Journal Article
Published: 01 October 2013
The Canadian Mineralogist (2013) 51 (5): 669–688.
... author e-mail address: felixvkaminsky@aol.com 12 06 2013 31 10 2013 © The Mineralogical Association of Canada 2013 diamond inclusions lower mantle Deep Mantle carbonatite volatiles carbonates magnesite breunnerite eitelite halides phosphates Na 4 Mg 3 (PO 4 ) 2 (P 2...
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Journal Article
Journal: AAPG Bulletin
Published: 01 October 1929
AAPG Bulletin (1929) 13 (10): 1377–1386.
.... The carbonate micro-rhombs in the Fushun shale are probably siderite, containing a moderate amount of magnesium, besides a trace of calcium. The amount of magnesium seems to be less than that of the pistomesite ( MgCO 3 FeCO 3 ) subtype of breunnerite. Among the paragenetic minerals, the micro-globules...
Journal Article
Published: 01 September 2021
Russ. Geol. Geophys. (2021) 62 (9): 1021–1035.
... a cryptocrystalline structure and an essentially antigorite composition with magnetite dissemination. In places, they are talcificated and intensively crushed and contain breunnerite in cracks. Fig. 2. Scheme of the geologic structure of the Ospa–Kitoi massif, simplified from Glazunov ( 1981 ). 1 , Quaternary...
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Journal Article
Published: 01 July 2018
American Mineralogist (2018) 103 (7): 1087–1102.
... spinel, and chlorite. The carbonates are mainly magnesite and breunnerite, with minor amounts of calcite and dolomite. Breunnerite clearly formed at the expense of primary carbonates and is sometimes in turn replaced by Fe–Mn oxides. Fuchsite has a dark emerald-green color. It forms flakes as well...
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Journal Article
Published: 01 February 2000
Mineralogical Magazine (2000) 64 (1): 95–111.
...F ig . 3. Carbonate mineral compositions in sample R.4735.1 (circles) relative to fields for calcite, dolomite-ankerite and breunnerite reported from lamprophyres (after Rock, 1987 , 1991 ). ...
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Journal Article
Published: 01 September 2006
Russ. Geol. Geophys. (2006) 47 (9): 989–995.
... are calcite and breunnerite (X-ray analysis data). Table 1 presents the chemical and trace-element compositions of the studied rocks. By petrochemistry, the West Siberian andesites belong to normal rocks ( Fig. 1 ) of K-Na series (Na 2 O/K 2 O = 0.4–1.2), and by alumina value, to medium- and high...
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Journal Article
Journal: Elements
Published: 01 February 2024
Elements (2024) 20 (1): 31–37.
... (dolomite and breunnerite), iron sulfides (pyrrhotite and pentlandite), and magnetite, all of which are considered to have precipitated from aqueous solution ( Nakamura et al. 2022 ). Assuming oxygen isotope equilibrium between dolomite and magnetite, these two minerals were at equilibrium at 37 ± 10 °C...
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Published: 01 January 2013
EISBN: 9780903056434
... due to the smaller size of the magnesium ion. Pure end-member magnesite has the composition MgCO 3 , and there appears to be a complete solid-solution series between magnesite and siderite, FeCO 3 . The ferroan variety, breunnerite, extends from 5 to 50 mol% FeCO 3 . The substitutions of Mn for Mg...
Journal Article
Published: 01 September 2021
American Mineralogist (2021) 106 (9): 1388–1419.
... 39,91,99,100 Magnesite (MgCO 3 ) and siderite (FeCO 3 ) a SA breunnerite Aqueous alteration in ordinary and carbonaceous chondrites 39,91,100–102 Rhodochrosite (MnCO 3 ) SA rhodochrosite Aqueous alteration in Yamato 82162 carbonaceous chondrite 54,102 Aragonite (CaCO 3 ) SA aragonite...
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Journal Article
Published: 01 January 2003
American Mineralogist (2003) 88 (1): 87–92.
... fractionation is larger, but this difference is a result of production of CO and O 2 . Other carbonates, such as breunnerite and magnesite, will almost certainly show less fractionation than siderite because their lower Fe contents mean that the effect of redox reactions will be less important. Magnetite...
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Journal Article
Published: 01 December 2017
American Mineralogist (2017) 102 (12): 2415–2421.
.... , Lindgren , P. , and Sofe , M.R. ( 2014 ) Aragonite, breunnerite, calcite and dolomite in the CM carbonaceous chondrites: High fidelity recorders of progressive parent body aqueous alteration . Geochimica et Cosmochimica Acta , 144 , 126 – 156 . Lewis , J.S. , McKay , D.S...
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Journal Article
Journal: AAPG Bulletin
Published: 01 August 1989
AAPG Bulletin (1989) 73 (8): 989–998.
... and breunnerite) in carbonaceous chondrites can also be reproduced by Fischer-Tropsch synthesis. They suggested that hydrocarbon synthesis took place during the accretion of these meteorites at 300-350 K (27°-77°C); the synthesis was catalyzed by magnetite and hydrous silicates that formed, together with hydrogen...
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Journal Article
Published: 01 October 2021
Russ. Geol. Geophys. (2021) 62 (10): 1139–1156.
..., and Ni–Co minerals point to lower-ore erosional truncation. The composition of carbonates in beresites can also be used as a mineralogical criterion. Calcite and dolomite are typical of the deep horizons of an ore-metasomatic column, and ankerite, siderite, and breunnerite, of the middle and upper...
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Journal Article
Published: 01 September 2012
Journal of the Geological Society (2012) 169 (5): 601–612.
... alterations are present. Some bodies have been mined to exhaustion for talc and soapstone such as the talc mines at Framfjord ( Fig. 3 ) and the soapstone quarries in the Bergen Arcs ( Fig. 2 ). Alteration to serpentinite and talc–carbonate–spinel rocks is very common; such rock types contain breunnerite...
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