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| Leibniz University, Welfengarten 1 D-30167 Hannover, Germany Abstract The Central European Variscides and their...West Sudetes and its western prolongation the Fichtelgebirge-Erzgebirge Anticline which is well known for...2.1.4. The Subvariscan Foredeep 8 During the Upper Carboniferous, the Subvariscan Foredeep subsided...in the West, through the Ruhr District, Germany, to the Upper Silesian Coal Basin, Poland. The basin fill...calcareous platform sediments of the Malm series (Upper Jurassic) (Dill and Klosa, 2011). The Late Mesozoic |
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| pyrargyrite, stephanite, polybasite in Obersachsen (Germany), Fresnillo in Zacatecas and acanthite appeared...Guanajuato (Mexico) and has become the richest silver mine in the world, in more recently Bou Azzer and Imiter...ceased vein. The San Juan production by the de Rayas mine in time of World War II. Guanajuato also In 1946...very city In Morocco, the of Oberschlema Bou Azzer mine, itself, which finally already very had to be relocated...and east of Schlema, 2014 Tucson show. The Imiter mine began its modern producing many quality specimens |
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| Zusammenfassung Nachweis komplexer Zonierung und Resorption im Breunnerit mittels Riickstreuelektronenbilder Breunnerit-Proben...analyzed, the abandoned salt mine of Hall in Tyrol, Austria (asterisk). (D Germany, CH Switzerland, CS Czechoslovakia...common, compositional zoning in magnesite (cf. Purvis, 1988) and magnesite-siderite solid solutions (e.g...age (Reichenhall Formation) in the abandoned salt mine of Hall in Tyrol in the western part of the Northern...coarsely-crystalline, partly pinolitic breunnerite (ferroan magnesite), replacing dark-grey bituminous dolomicrites |
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| and vein-type barium mineralization in NE Bavaria, Germany Harald G. Dill a,∗ , Berthold Weber b , Reiner...D-30631 Hannover, Germany Bürgermeister-Knorr Str. 8, D-92637 Weiden i.d.OPf., Germany c University Kiel...Department, Olshausenstraße 40-60, D-24118 Kiel, Germany b a r t i c l e i n f o Article history: Received...Pegmatite Barium Phosphate Shear-zone NE Bavaria SE Germany a b s t r a c t Pegmatites and aplites enriched...lithological units of the NE Bavarian Basement, SE Germany. They are accompanied by Ba mineralization, in |
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| at the western border of the Bohemian Massif (Germany} Received: 16 December 1991/Accepted: 7 April...complex late to post-Variscan crustal evolution. Upper Carboniferous (mainly Westphalian) granites were...Goethe-Universit/it, D-60325 Frankfurt a. M., Germany Key words Bohemian Massif structures - Palaeostress...Massif, in the northern part of the Oberpfalz (Germany). In this area three different pre-Permian tectonometamorphic...low-pressure/high-temperature (LP-- HT) stage of the upper amphibolite facies (Wagener-Lohse and B1/Jmel, 1984; |
 | Morteani, G., Moeller, P., Schley, F. (1982) The rare earth element contents and the origin of the sparry magnesite mineralizations of Tux-Lanersbach, Entachen Alm, Spiessnaegel, and Hochfilzen, Austria, and the lacustrine magnesite deposits of Aiani-Kozani, Greece, and Bela Stena, Yugoslavia. Economic Geology, 77 (3) 617-631 doi:10.2113/gsecongeo.77.3.617 | Journal (article/letter/editorial) |
| Element Contentsand the Origin of the Sparry Magnesite Mineralizationsof Tux-Lanersbach,EntachenAim,...Strassedes17. Juni 135,D-1000 Berlin 12, West Germany P. M•LLER,ANDF. $CHLEY Hahn-Meitner-Institutfiir... GlienickerStrasse100, D-1000 Berlin 39, West Germany Abstract The rare earth elementdistributionpatternsof...feature is attributedto long-rangemobilizationof magnesite. The tectonicstructureof the graywackezoneand...highertectonicunitswastherebymetasomatically alteredto magnesite. Sucha regional metamorphism isdisplayedby the |
 | Oskierski, Hans C., Bailey, Judy G., Kennedy, Eric M., Jacobsen, Geraldine, Ashley, Paul M., Dlugogorski, Bogdan Z. (2013) Formation of weathering-derived magnesite deposits in the New England Orogen, New South Wales, Australia: Implications from mineralogy, geochemistry and genesis of the Attunga magnesite deposit. Mineralium Deposita, 48 (4) 525-541 doi:10.1007/s00126-012-0440-5 | Journal (article/letter/editorial) |
| -5 ARTICLE Formation of weathering-derived magnesite deposits in the New England Orogen, New South...mineralogy, geochemistry and genesis of the Attunga magnesite deposit Hans C. Oskierski & Judy G. Bailey & Eric...Nodular, cryptocrystalline, weathering-derived magnesite deposits in the New England Orogen, Australia... provide a significant source of high-purity magnesite. Common textural features and related isotopic...genetic relationship between weatheringderived magnesite deposits hosted by ultramafic rocks at Attunga |
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| Rundschau 79/2 I 291-2991 Stuttgart 1990 Genesis of magnesite deposits - models and trends By W. POHL, Braunschweig*)...deposits: Die gr6fken bergbaulichen Reserven iiegen im Veitsch Typ The world's largest reserves are found...Plattformsedimenten. Besonders auff~illigsind cha- ,,spar,, magnesite hosted by marine platform sediments. Conrakteristische...Lagerst~/ttenund ihrer Nehengesteine, welche insgesamt magnesite bearing suites, which indicate formation within...to this trend it is here concluded by integrating Im Gegensatz zu diesem Trend wird hier auf Grund einer |
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| Salt miners at work in the Diirrnberg-Hallein mine (1756) (see also comment on copyright page) Mineral...work in the Durrnberg-Hallein mine (1756). Oil painting in the ancient mine office at Hallein Salzburg....Werkstiitter (1708-1772) on the occasion of a visit to the mine by the Prince Bishop Sigmund III. of Salzburg on...At the top of the painting and on the steps are mine surveyors and a miner at work. Note the romantic...Leoben/ Austria 5-10,1981, held at Berchtesgaden/Bavaria, FRG The present volume contains the greater number |
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| tectonic controls on the formation of sparry magnesite deposits - the deposits of the northern Greywacke...Betrachtung der Stabilit~itsdaten fiir Magnesit und Dolomit im Gleichgewicht mit einer fluiden Phase mit unterschiedlichen...nit gebildet werden kann. Abstract The sparry magnesite deposits of the northern Greywacke Zone are situated...of the moving thrust sheet. Stability data of magnesite and dolomite in contact with fluids with different...this tectonically induced fluid flow produce magnesite from preexisting dolomite by metasomatism. de |
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| 2005 Genesis of hydrothermal stockwork-type magnesite deposits associated with ophiolite complexes in...observations and C and O isotopic compositions of two magnesite deposits within the Lower Cretaceous Dağküplü...large microcrystalline stockwork-type magnesite systems within the upper part of highly fractured and imbricated...containing fresh dunite, harzburgite and serpentinite. Magnesite in ultramafic rocks occurs either as stockwork...within magnesite veins. Some serpentinite fragments and platelets are rimmed by fibrous magnesite, indicating |
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| rhythmically layered gabbro and quartz diorite in the upper section. There are three generations of shear zones...thrust and strike-slip shear zones. Talc and magnesite were also mined from the State-line serpentinite...pegmatite dikes but both talc and magnesite formed in mylonite where magnesite also fills the matrix of late-stage...within the active shear zones during talc and magnesite mineralization reflect fluid evolution to lower...mineralogies and controlled the distribution of talc and magnesite deposition. Introduction The State-line serpentinite |
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| aSiO2,aq and aCO2,aq set between talc–quartz–magnesite and serpentine–brucite equilibria are steepest...aCO2,aq and aSiO2,aq while the stability field of magnesite contracts. In addition, the enhanced solubility...toward higher temperatures shifts the talc–quartz–magnesite equilibrium to very high aCO2,aq. Field observations...2003; Giammar et al., 2005; Hänchen et al., 2006; Johannes, 1967, 1969; Mckelvy et al., 2007; O'Connor et...petrological studies of the system MgO–SiO2–H2O–CO2 by Johannes (1967, 1969) and Greenwood (1967) reveal that |
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| in a weathering-derived, serpentinite-hosted magnesite deposit: 14C tracing of carbon sources and age...available online 30 August 2013 Abstract The Attunga magnesite deposit is texturally and geochemically distinct...other spatially associated, serpentinite-hosted magnesite deposits in the Great Serpentinite Belt, New South...Piedmont magnesite deposit or widespread silica–carbonate alteration zones. Cryptocrystalline magnesite at...and oxygen isotope signatures show that nodular magnesite at Attunga has formed under near-surface conditions |
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| to the equations forsterite + CO2-*enstatite + magnesite, and forsterite + SiO2-*enstatite. This metasomatism...Ruhr-Universitdt Bochum, Postfach 2148,1)-463 Bochum, W. Germany. Rocks consisting predominantly of orthorhombic...characterized by the occurrence of dolomite instead of magnesite in addition to orthopyroxene and occasionally...This would mean that tLe occurrences of both magnesite and dolomite are taken into account. Because assemblages...by large crystals of orthopyroxene (Opx) and magnesite (M). Olivine-bearing carbonate-orthopyroxenite |
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| tremolite, forsterite, talc, calcite, dolomite and magnesite in progressively metamorphosed ophicarbonate rocks...partially overlapping fields in the T-Xco2 diagram. The upper temperature limit of ophicalcite rocks lies below...component. With the exception of serpentine and magnesite, the list of minerals that comprise ophicarbonate...where serpentine is stable, the H20-rich side (Johannes, 1969), has received comparatively little attention...+ TREMOLITE 4c I1 * t3c 23* 8c 7c I c 3c 6* 16m Im 6 7 18 4 15 5 4 8 6 many many Fig. 2. Frequency |
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| Carbonate-orthopyroxenites from Troms consist of enstatite and magnesite with variable amounts of olivine, talc, serpentine...maucherite. Related rocks comprise olivine-magnesite-, talc-magnesite-, and olivine-orthopyroxene (saxonite)-assemblages...gas-deficient assemblage enstatite+talc+forsterite+magnesite is presumed to be stable at pressures above 5... Similar rocks, with dolomite in addition to magnesite and with tremolite and/or diopside, were later...Ruhr-Universitdt Bochum, Postfach 2148, D-463 Bochum, W. Germany 304 W. OHNMACHT—PETROGENESIS OF PETROGRAPHY |
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| sind, entsprechen. Rein sediment;ir entstandene Magnesite werden praktisch nur in evaporitischem Milieu...sollten infolge der kurzen Verweilzeit dieser Elemente im Meerwasser wesentlich niedrigere REE-Gehalte und...Die Mg-reichen L6sungen, die zur Bildung der Magnesite notwendig waren, entstammen vermutlich tiefliegenden...tiefliegenden Sepentiniren, auf die es Hinweise im Untergrund der oststeirischen Gneisskomplexe und des siidpenninischen...Abstract The major and trace element geochemistry of magnesite and dolomite samples from alternating rock masses |
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| Mg3Si2Os(OH)4 + Mg(OH) 2 chrysotile brucite (1) (Johannes 1968) than the presence of serpentine ~.lone:...higher temperature-pressure metamorphic event (upper greenschist or amphibolite facies) than is necessary...alteration or one or the other may predominate. The im- portant factors besides mineralogy and paragenesis...front producing H2]** 2 serpentine 3 talc + magnesite [CO~ front producing 0~] talc + m agnesite country...vs temperature for the assemblages iron-magnetite (IM), magnetite-awaruite (Ni2Fe1'%O, and NisFe-FesO~) |
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| 1775–1791 Petrography and Geochemistry of the Eugui Magnesite Deposit (Western Pyrenees, Spain): Evidence for...31630 Zubiri, Spain Abstract The Eugui-Asturreta magnesite deposit (Western Pyrenees, Spain) forms a discoidal...within a folded Namurian carbonate sequence. The magnesite rocks are composed of lens-shaped crystals (max...textural characteristics of magnesite and the structural relationships between magnesite and dolostone host rocks...rocks indicate that magnesite replaced the host dolostone. The magnesite crystals replaced the host dolostones |
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| belonging to the metamorphic Palaeozoic of the Upper Austroalpine Gurktal nappe system. Wolframite (ferberite...network fissure fillings in coarse-grained Fe-magnesite (siderite 15) rocks (average W content ca. 0.9...formation of the wolframite- and scheelite-bearing Fe-magnesite rocks. Systematic prospecting for scheelite,...the presence of wolframite and scheelite in Fe-magnesite rocks. The mineralization was investigated at...rocks belong to the metamorphic Palaeozoic of the Upper Austroalpine (UAA) Stolzalpe unit of the Gurktal |
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| Economic Geology, Johannes-Gutenberg-University Mainz, D-55099 Mainz, Becherweg 21, Germany a r t i c l e...atmosphere, hydrosphere and lithosphere (crust and the upper mantle). There are physical barriers hampering our...“Gesellschaft für Metall-, Hütten- und Bergleute” in Germany (GDMB). These data have been reported in the final...fallen out of use, excluding uranium in modern-day Germany. Exploration does not place the main emphasis on...Mineral Chemical composition Line Maghemite Magnesite Magnetite Magnetite/vanadiferous Malachite Malayaite |
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| Economic Geology, Johannes-Gutenberg-University Mainz, D-55099 Mainz, Becherweg 21, Germany a r t i c l e...atmosphere, hydrosphere and lithosphere (crust and the upper mantle). There are physical barriers hampering our...“Gesellschaft für Metall-, Hütten- und Bergleute” in Germany (GDMB). These data have been reported in the final...fallen out of use, excluding uranium in modern-day Germany. Exploration does not place the main emphasis on...Mineral Chemical composition Line Maghemite Magnesite Magnetite Magnetite/vanadiferous Malachite Malayaite |
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| 1007/s00710-012-0251-5 ORIGINAL PAPER Formation of magnesite and siderite deposits in the Southern Urals—evidence...Springer-Verlag Wien 2012 Abstract World-class deposits of magnesite and siderite occur in Riphean strata of the Southern...to the formation of the epigenetic dolomite, magnesite and hydrothermal siderite were genetically related...succession of events leading to the formation of magnesite in a first stage. After burial and diagenesis...temperature stable isotope evidence shows that the magnesite forming brines had δ18OSMOW values of~ +1 ‰ thus |
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| both the magnesite and dolomite.Apartfrom the thin bandsof schistanddolomite,the magnesite ore containsabout5...1 percentFeCOs at 805 m. Experimentalstudiesof Johannes(1970) suggestthat a MgCla solutionwith smallamountsof...sheetsoccurswithin the Whyte schists. GREYWACKES GRANITES UPPER ++ ++ ++t OEVONIAN Spry (1962), for example, de...PiemanRiver whichcut the Whyte schists and CAMIBRIAN MAGNESITE LOWER • THE SAVAGE RIVERappearlessmetamorphosedthan...CAMBRIAN DOLOMITES PRECAMIBRIAN • QUARTZITES MAGNESITE PRECAMBRIAN SCHISTS delineates a wide zone |
