 | | Journal (article/letter/editorial) | | Talc–carbonate alteration of ultramafic rocks within the Leka Ophiolite Complex, Central Norway A. Bjerga...University of Bergen, Allégaten 41, N-5007 Bergen, Norway a r t i c l e i n f o Article history: Received...2015 Keywords: Leka ophiolite Serpentinite Talc–carbonate Thermodynamic modeling Geochemistry Dehydration...mineral assemblage serpentine–magnesite–magnetite–dolomite formed at temperatures b500 °C and low XCO2 (≤0...minerals in the partly altered peridotites. Talc–carbonate rocks formed by the breakdown of the serpentine |  | | Journal (article/letter/editorial) | | Processes (PGP), University of Oslo, Oslo 0316, Norway c Géosciences Environnement Toulouse (GET), CNRS...were collected from three different localities in Norway. Coexisting olivine and serpentine exhibit invariant...in 26 Mg with mean δ 26 Mg = −0.95 ± 0.15h. As carbonate minerals dissolve faster than silicate minerals...1. a Overview map showing sample localities in Norway. b Reaction front between unaltered serpentinite...2006). The former hypothesis is consistent with carbonate precipitation in the oceans, whereas the latter |  | | Journal (article/letter/editorial) | | schistosity or occur in several types of discordant veins. In addition to the chemical and mineralogical controls...and in carbonate-hosted deposits at Franklin, New Jersey, (Dunn 1995) and in Sweden and Norway (Långban-type...incorporating these elements occur mostly in late veins that postdate the peak of metamorphism. Arsenic...(Guilbert & Park 1986), and their occurrence in late veins within syngenetic Fe–Mn deposits has in some cases...between metamorphic climax and formation of the late veins, because geochemical studies aim to reconstitute |  | Mervine, Evelyn M., Humphris, Susan E., Sims, Kenneth W.W., Kelemen, Peter B., Jenkins, William J. (2014) Carbonation rates of peridotite in the Samail Ophiolite, Sultanate of Oman, constrained through 14C dating and stable isotopes. Geochimica et Cosmochimica Acta, 126. 371-397 doi:10.1016/j.gca.2013.11.007 | Journal (article/letter/editorial) | | maximum of 1 to 3 106 kg CO2/yr. Ca-rich carbonate veins that are associated with the surface travertine...000 yr BP (average: 15,000 yr BP). Mg-rich carbonate veins exposed in outcrops have ages ranging from...in the previous studies) indicates that no carbonate veins from the natural peridotite weathering surface...limit of 14C. However, 14C dating of Mg-rich carbonate veins from three roadcut exposures (Qafeefah, Fanja...roadcut veins are 14C dead (>50,000 yr BP). A location weighted average indicates that 40% of veins sampled |  | | Report (issue) | | Silicate rock______________________________ Carbonate bodies in the granitic rocks_______ Origin of...Olivine gabbro. ________________________________ Carbonate veins_________----__---------__--_---___Character..._____________________ Carbonate type _ __._--_______-___-_-_____Apatite-magnetite-carbonate veins and iron oxide...oxide veins. ___________________________________ Aegirite-amphibole. _ ________________________ Hastingsite...puzzling deposit of all is the central mass of dolomite, which the author aptly terms "marble," a term |  | Ulven, O.I., Beinlich, A., Hövelmann, J., Austrheim, H., Jamtveit, B. (2017) Subarctic physicochemical weathering of serpentinized peridotite. Earth and Planetary Science Letters, 468. 11-26 doi:10.1016/j.epsl.2017.03.030 | Journal (article/letter/editorial) | | Processes (PGP), University of Oslo, 0316 Oslo, Norway The Institute for Geoscience Research (TIGeR),...subsequent fracturing due to growth of ice and carbonate minerals. Here we combine textural and mineralogical...subject to pressure from the growth of ice and carbonate minerals in surface-near fractures. The mechanical...dunites from the Feragen Ultramafic Body (FUB), SE-Norway. Olivine and serpentine are effectively inert at...water saturation state with respect to hydrous Mg carbonate minerals, which are commonly found as infill in |  | Scambelluri, Marco, Bebout, Gray E., Belmonte, Donato, Gilio, Mattia, Campomenosi, Nicola, Collins, Nathan, Crispini, Laura (2016) Carbonation of subduction-zone serpentinite (high-pressure ophicarbonate; Ligurian Western Alps) and implications for the deep carbon cycling. Earth and Planetary Science Letters, 441. 155-166 doi:10.1016/j.epsl.2016.02.034 | Journal (article/letter/editorial) | | melting of carbonated rocks, and dissolution of carbonate minerals lead to the return of CO2 to the atmosphere...degassing. Release of COH fluids from hydrous and carbonate minerals influences C recycling and magmatism at...released into fluids (by decarbonation and/or carbonate dissolution) and 18–43 Mt/yr is returned at arc... major and trace element concentrations, and carbonate C and O isotope compositions, we demonstrate that...breakdown of dolomite in nearby marbles, thus releasing C into fluids. Carbonate + olivine veins document |  | | Journal (article/letter/editorial) | | o - A u - U mineralization is associated with carbonate and quartz within albitized country rocks. Typical...exploitable gold deposits namely, Bidjovagge in Norway (Bj6dykke et al., 1987), Saattopora in Finland...FINLAND currences associated with quartz-carbonate veins and hosted by tholeiites and feldspar porphyritic...hosted mainly by quartzitic sedimentary rocks; veins are less important. At least one Kuusamo occurrence...contact is marked by pyroclastic deposits with dolomite-intercalations grading into the overlying Sericite |  | | Book | | Infrared Spectroscopy to Determine the Quality of Carbonate-Rich Diatomite Ores Reprinted from: Minerals 2018...Hydrothermal Breccia of Berglia-Glassberget, Trøndelag, Norway: Snapshot of a Triassic Earthquake Reprinted...Silica in Sinters and Quartz Veins: Implications for the Formation of Bonanza Veins in Low-Sulfidation Epithermal...Multi-Stage Evolution of Gold-Bearing Hydrothermal Quartz Veins at the Mokrsko Gold Deposit (Czech Republic) Based...guest lecturer at universities in Austria, Brazil, Norway, Italy, Poland, Spain, and Russia and was invited |  | | Book | | Infrared Spectroscopy to Determine the Quality of Carbonate-Rich Diatomite Ores Reprinted from: Minerals 2018...Hydrothermal Breccia of Berglia-Glassberget, Trøndelag, Norway: Snapshot of a Triassic Earthquake Reprinted...Silica in Sinters and Quartz Veins: Implications for the Formation of Bonanza Veins in Low-Sulfidation Epithermal...Multi-Stage Evolution of Gold-Bearing Hydrothermal Quartz Veins at the Mokrsko Gold Deposit (Czech Republic) Based...guest lecturer at universities in Austria, Brazil, Norway, Italy, Poland, Spain, and Russia and was invited |  | van Zuilen, Mark A, Lepland, Aivo, Teranes, Jane, Finarelli, John, Wahlen, Martin, Arrhenius, Gustaf (2003) Graphite and carbonates in the 3.8 Ga old Isua Supracrustal Belt, southern West Greenland. Precambrian Research, 126 (3) 331-348 doi:10.1016/s0301-9268(03)00103-7 | Journal (article/letter/editorial) | | b Geological Survey of Norway, Leiv Eirikssons vei 39, Trondheim 7491, Norway Committee on Evolutionary...Greenland. Most of the graphite in the ISB occurs in carbonate-rich metasomatic rocks (metacarbonates) while...cation composition (Fe, Mg, Mn, and Ca) of the carbonate minerals, carbon isotope ratios of carbonates...magnetite. Equilibrium isotope fractionation between carbonate and graphite in the rocks indicates peak metamorphic...(δ13 C range from −25 to −6‰) of graphite in carbonate-rich rocks has been interpreted to reflect post-depositional |  | Richard, Antonin, Banks, David A., Mercadier, Julien, Boiron, Marie-Christine, Cuney, Michel, Cathelineau, Michel (2011) An evaporated seawater origin for the ore-forming brines in unconformity-related uranium deposits (Athabasca Basin, Canada): Cl/Br and δ37Cl analysis of fluid inclusions. Geochimica et Cosmochimica Acta, 75 (10) 2792-2810 doi:10.1016/j.gca.2011.02.026 | Journal (article/letter/editorial) | | fluid inclusions from hydrothermal quartz and carbonate veins spatially and temporally associated with giant...overgrowths in basin sandstones or in quartz-carbonate veins crosscutting basin sandstones and basement...PREVIOUS STUDIES Previous Cl/Br data for quartz and carbonate-hosted fluid inclusions in unconformity-related...fluid inclusion leachates from 11 quartz and dolomite veins from the Rabbit Lake deposit. They found molar...and 220 in fluid inclusion leachates from quartz veins. They argued that organic matter is nearly absent |  | | Journal (article/letter/editorial) | | rocks (65-75% albite, 10-20% quartz and 10-15% dolomite) occur in zones up to 1.5 km wide within a sequence...deposits: the Bidjovagge Cu-Au deposit in northern Norway, for example, is located in albite felsite (Bjorlykke...consists o f albite, with quartz ( 10-20% ) and dolomite ( 10-15% ) as the only other major components...dolomitic marbles, and anhydrite is locally present; carbonate sedimentation is believed to have taken place...photograph), bleached and altered along quartz and carbonate filled fractures. Note the relic of dark siltstone |  | | Journal (article/letter/editorial) | | Czechoslovakia; Freiberg and Schneeberg, Germany; Kongsberg, Norway; Bou Azzer, Morocco; and the Consols mine at Broken...pyrite) near the ore-bearing veins. The east-to-nort heast-t rending veins range in thickness from less...1 inch t o over 10 feet near the ore pods. The veins tend t o narrow and become less well defined as...segregations of metallic minerals in veins composed of dolomite and chert. These pods can measure up...and 4 inches t o several feet in thickness. The veins commonly contain altered brecciated fragments of |  | | Journal (volume) | | lithological types: (I) biotite schists with talc-carbonate ± pyrite veins and (2) coarse-grained and non-schistose...amphibole rocks with associated quartz ± barite veins and pods. The least altered amphibole-chlorite schists...closely associated with magnetite and tale-carbonate veins, in which it is fine-grained and occurs together...form towards the margins of the quartz ± barite veins, where it may locally comprise aggregates up to.... . ... . ... . . . . . .. . ................. Veins .. .... . .................. . .... .. .. . .. |  | | Journal (article/letter/editorial) | | gave rise to several phases of mineralisntion in veins and shear zones. The accompanying ~renitisation...about 90 km 2. The main rack-forming minerals are dolomite-ankerite, apatite, orange reversely pleoehroie...Associated rnetasomatic and hydrothermal activity Veins with Calcite-black quartz-purple fluorite and C...zones Calcte-siderRe-K-feldspar veins and Calcite-dolomite-pyrite veins and Radioactive shear zones (margin)...HYDROXIDES Limonite HALIDES Fluorite CARBONATES Calcite Dolomite-ankerite Siderite Monohydrocalcite SULFHATES Baryte |  | | Journal (article/letter/editorial) | | listvenite—fully carbonated peridotite, with all Mg in carbonate minerals and all Si in quartz—occur along the...listvenites are composed primarily of magnesite and/or dolomite + quartz + relict Cr-spinel. In some instances...talc and antigorite are present in addition to carbonate and quartz. The presence of antigorite + quartz... This range of temperature is consistent with dolomite and magnesite clumped isotope thermometry in listvenite...depths in the subduction zone, making release of carbonate-saturated pore-water due to compaction of subducted |  | Lafay, Romain, Baumgartner, Lukas P., Stephane, Schwartz, Suzanne, Picazo, German, Montes-Hernandez, Torsten, Vennemann (2017) Petrologic and stable isotopic studies of a fossil hydrothermal system in ultramafic environment (Chenaillet ophicalcites, Western Alps, France): Processes of carbonate cementation. Lithos, 294. 319-338 doi:10.1016/j.lithos.2017.10.006 | Journal (article/letter/editorial) | | ophicalcites, Western Alps, France): processes of carbonate cementation Romain Lafay, Baumgartner P. Lukas...ophicalcites, Western Alps, France): processes of carbonate cementation. The address for the corresponding...ophicalcites, PT Western Alps, France): processes of carbonate cementation. LAFAY Romain, aBAUMGARTNER P. Lukas...millimetric pre- or syn- clast formation calcite veins accompanied by a SC pervasive carbonation of residual...infiltrated by multiple crack formation and some dolomite locally formed along serpentinite-calcite interfaces |  | Boskabadi, Arman, Pitcairn, Iain K., Broman, Curt, Boyce, Adrian, Teagle, Damon A. H., Cooper, Matthew J., Azer, Mokhles K., Stern, Robert J., Mohamed, Fathy H., Majka, Jaroslaw (2017) Carbonate alteration of ophiolitic rocks in the Arabian–Nubian Shield of Egypt: sources and compositions of the carbonating fluid and implications for the formation of Au deposits. International Geology Review, 59 (4) 391-419 doi:10.1080/00206814.2016.1227281 | Journal (article/letter/editorial) | | homepage: http://www.tandfonline.com/loi/tigr20 Carbonate alteration of ophiolitic rocks in the Arabian–Nubian...Stern, Fathy H. Mohamed & Jaroslaw Majka (2016): Carbonate alteration of ophiolitic rocks in the Arabian–Nubian...http://dx.doi.org/10.1080/00206814.2016.1227281 Carbonate alteration of ophiolitic rocks in the Arabian–Nubian...the Arabian–Nubian Shield (ANS) show pervasive carbonate alteration forming various degrees of carbonated...composition, and geochemistry of suites of variably carbonate altered ultramafics from the Meatiq area of the |  | Noël, J., Godard, M., Oliot, E., Martinez, I., Williams, M., Boudier, F., Rodriguez, O., Chaduteau, C., Escario, S., Gouze, P. (2018) Evidence of polygenetic carbon trapping in the Oman Ophiolite: Petro-structural, geochemical, and carbon and oxygen isotope study of the Wadi Dima harzburgite-hosted carbonates (Wadi Tayin massif, Sultanate of Oman) Lithos, 323. 218-237 doi:10.1016/j.lithos.2018.08.020 | Journal (article/letter/editorial) | | intense (> 20 Vol%) carbonate veining. We identified a sequence of 3 types of carbonate veins with compositions...compositions ranging from calcite to dolomite PT (Mg/Ca = 0-0.85). Type 1 carbonates occur as a fine diffuse...(110 to 15°C). Type 2 carbonates are localized in veins, which acted as main flow paths for fluids interacting...lithosphere (50°C-10°C). The orientation of these veins is controlled by the crystallographic PT E anisotropy...including AC PDB CE were recrystallized to form dolomite and calcite microcrystals (trace element enriched; |  | Boskabadi, Arman, Pitcairn, Iain K., Leybourne, Matthew I., Teagle, Damon A.H., Cooper, Matthew J., Hadizadeh, Hossein, Nasiri Bezenjani, Rasoul, Monazzami Bagherzadeh, Reza (2020) Carbonation of ophiolitic ultramafic rocks: Listvenite formation in the Late Cretaceous ophiolites of eastern Iran. Lithos, 352. 105307 doi:10.1016/j.lithos.2019.105307 | Journal (article/letter/editorial) | | protolith to final listvenite (quartz + magnesite/± dolomite + relict Cr-spinel) reflects successive fluid-driven...listvenitic assemblages includes silicacarbonate, carbonate and silica listvenites with the latter (also known...aSiO2, and oxygen and sulfur fugacities. The carbonate and silica listvenite end-members indicate variations...and consequent carbonation segregated Mg into carbonate and Si into silica re listvenites. Trace element...magnesite and dolomite in carbonated lithologies and veins point to na sedimentary carbonate as the main |  | Peters, Carl A., Piazolo, Sandra, Webb, Gregory E., Dutkiewicz, Adriana, George, Simon C. (2016) In search of early life: Carbonate veins in Archean metamorphic rocks as potential hosts of biomarkers. Earth and Planetary Science Letters, 453. 44-55 doi:10.1016/j.epsl.2016.08.003 | Journal (article/letter/editorial) | | com/locate/epsl In search of early life: Carbonate veins in Archean metamorphic rocks as potential hosts...life Archean Pilbara Craton organic matter carbonate veins biomarkers a b s t r a c t The detection of...Jeerinah Formation (2.63 billion yrs) and Carawine Dolomite (2.55 billion yrs) of the Pilbara Craton (Western...previously reported. Both the mineral assemblages (carbonate, quartz, Fe-chlorite, muscovite, microcline, rutile...rocks are cut by younger formation-specific carbonate veins containing primary oil-bearing fluid inclusions |  | | Journal (article/letter/editorial) | | Science (NTNU), Sem Sælands vei1, 7491 Trondheim, Norway a r t i c l e i n f o Article history: Received...zone in the Seiland Igneous Province (SIP), North Norway. Strain localization in association with hydration...clinopyroxene react to form orthopyroxene and dolomite at approximately 11 kb and 850 ◦ C according to...2 CO2 = Dolomite + 2 Orthopyroxene This reaction formed coronas of orthopyroxene and dolomite between...subgrain walls decorated by rounded grains of dolomite and more irregular and elongated grains of orthopyroxene |  | | Report (issue) | | its rare-earth-bear ing carbonate rocks. One deposit, the Sulphide Queen carbonate body, is the greatest...Providence Mountains. By 1870 many silver-bearing veins had been discovered and explored on the north slope...Barnwell in 1892, to permit exploration of the gold veins at Vanderbilt, near Barnwell, which lies about 20...north of the highway and in which the Birthday veins are now known, was not found in 1926. In the fall...induced prospectors to search for gold-bearing veins, and in December Fred B. Piehl returned to the Sulphide |  | | Journal (article/letter/editorial) | | inclusions are contained in syntectonic quartz veins in Triassic redbeds, Cretaceous carbonates and Hercynian...Hercynian basement rocks, with some calcite and dolomite data from limestones and evaporites in more external...salinity and halogen chemistry to those found in veins associated with Mesozoic Pb-Zn-F deposits which...McCaig, 1996). Fluid inclusions are found in quartz veins within shear zones, in their immediate wall-rocks...wall-rocks, and isolated within the granodiorite. The veins are syntectonic (Henderson and McCaig, 1996), and |
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