| 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...graphite in these rocks. Thermal decomposition of siderite; 6FeCO3 = 2Fe3 O4 + 5CO2 + C, is the process seemingly...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 | | Apukhtina, Olga B., Ehrig, Kathy, Kamenetsky, Vadim S., Kamenetsky, Maya B., Goemann, Karsten, Maas, Roland, McPhie, Jocelyn, Cook, Nigel J., Ciobanu, Cristiana L. (2020) Carbonates at the supergiant Olympic Dam Cu-U-Au-Ag deposit, South Australia. Part 1: Distribution, textures, associations and stable isotope (C, O) signatures. Ore Geology Reviews, 126. 103775pp. doi:10.1016/j.oregeorev.2020.103775 | Journal (article/letter/editorial) | Keywords: IOCG deposits Olympic Dam Carbonate minerals Siderite Stable isotopes The supergiant Olympic...mineralogically diverse component of carbonate minerals. Carbonate minerals are always associated with...and texture, and an attempt is made to relate carbonate formation to local and regional events that have...Olympic Dam. Based on a set of 196 carbonate-bearing samples, carbonate minerals are observed in all lithologies...breccia and conglomerates, as breccia clasts, in veins crosscutting ore-rich breccia and other rock types | | | Journal (article/letter/editorial) | quartz accounting for the lower values. Siderite in Stage III veins have d18O (+12 to +16&) and d13C values...and d13 CCO2 (5&) values from vein quartz and siderite are consistent with a magmatic hydrothermal source...sources of sulphur for sulphides in the Sams Creek veins. Another possible source of the sulphur is the lithospheric...alteration (high fO2) consisting of magnetite–siderite±biotite; Stage II consisting of thin quartz–pyrite...(low fO2) consisting of sulphides, quartz and siderite veins, and pervasive silicification. The lamprophyre | | | Journal (article/letter/editorial) | SCIENTIFIC COMMUNICATIONS AGE AND ORIGIN OF QUARTZ-CARBONATE VEINS ASSOCIATED WITH THE COEUR D’ALENE MINING DISTRICT...rare-earth element (REE) analyses of quartz-carbonate veins associated with the Coeur d’Alene mining district...Sm-Nd isochron age of siderites from ore-bearing veins (1511 ± 45 Ma) and a Pb-Pb isochron age of siderites...siderites, ankerites, and calcites from ore-barren veins (1523 ± 41 Ma) are similar to the model age of Coeur...Basin. Xenotime, an accessory mineral found in all veins, is zoned with a core laser ablation age of 1420 | | | 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 | | | Journal (article/letter/editorial) | granite. There are three typesof veins: Type I,.dark gray quartz veins; Type II, finelybanded,white, comb-quartzveins...magnetite-hematiteveins; (3) veins of Type I, gray quartz veins; (4) aplite dikes; (5) veins of Type II, white,... finely banded,comb-quartzveins; (6) veins of Type III, carbonateveins with cobalt, nickel, bismuth,...Area North of Contact Lake ...................... Veins ..................................................Quaternary Unconformity Precambrian (?) Large quartz veins (banded quartz). Basic Sills and Dikes (quartz | | | Journal (article/letter/editorial) | and BURKE, E. A. J., fluid inclusions from W. Norway, 145 Andesitic melts, forsterite dissolution in...BENY, C., see GUILHAUMOU,N., 257 Bergen Arcs, see Norway BERNARD, C., see CATHELINEAU,M., 169 Berndtite... J. and BASTOUL, A. M., fluids in Hercynian Au veins from France, 231 BONI, M., RANKIN, A. H. and SALVADORI...fluid inclusion trails in intrametamorphic quartz veins, 245 Breunnerite, from a selection of carbonatite...associated with oil bearing inclusions in fluorite veins, 335 Broken Hill, see New South Wales, Australia | | Fleck, R. J., Criss, R. E., Eaton, G. F., Cleland, R. W., Wavra, C. S., Bond, W. D. (2002) Age and Origin of Base and Precious Metal Veins of the Coeur D'Alene Mining District, Idaho. Economic Geology, 97 (1) 23-42 doi:10.2113/gsecongeo.97.1.23 | Journal (article/letter/editorial) | 23–42 Age and Origin of Base and Precious Metal Veins of the Coeur D’Alene Mining District, Idaho ROBERT... Idaho 83837 Abstract Ore-bearing quartz-carbonate veins of the Coeur d’Alene mining district yield...87Sr/86Sr ratios of 0.74 to >1.60 for low Rb/Sr, carbonate gangue minerals, similar to current ranges measured...prior to incorporation of Sr into the hydrothermal veins. Evaluation of the age and composition of potential...highly radiogenic Sr indicates that the ore-bearing veins of the Coeur d’Alene district formed during the | | Nikiforov, A. V., Bolonin, A. V., Pokrovsky, B. G., Sugorakova, A. M., Chugaev, A. V., Lykhin, D. A. (2006) Isotope geochemistry (O, C, S, Sr) and Rb-Sr age of carbonatites in central Tuva. Geology of Ore Deposits, 48 (4) 256-276 doi:10.1134/s1075701506040027 | Journal (article/letter/editorial) | Rb–Sr isochron age of igneous ankerite–calcite and siderite carbonatites in central Tuva is estimated at 118...6– 14.5)‰, and (87Sr/86Sr)i = 0.7042–0.7045 for siderite carbonatite. The obtained isotopic characteristics...low Nb and Ta contents. The REE fluorite–barite–siderite ore and associated ankerite– calcite rocks of...studies that allowed us to estimate the age of carbonate rocks and to demonstrate their compositional and...dipping dikelike bodies 100–160 m thick, and thin veins. Contacts of carbonatites with country rocks are | | Adomako-Ansah, Kofi, Mizuta, Toshio, Hammond, Napoleon Q., Ishiyama, Daizo, Ogata, Takeyuki, Chiba, Hitoshi (2013) Gold Mineralization in Banded Iron Formation in the Amalia Greenstone Belt, South Africa: A Mineralogical and Sulfur Isotope Study. Resource Geology, 63 (2) 119-140 doi:10.1111/rge.12000 | Journal (article/letter/editorial) | belt of South Africa, is hosted in an oxide (⫾ carbonate) facies banded iron formation (BIF). It consists...dominated by quartz, ankerite-dolomite series, siderite, chlorite, muscovite, sericite, hematite, pyrite...Blue Dot deposit is associated with quartz-carbonate veins that crosscut the BIF layering. In contrast...dolomite–ankerite series and chlorite decreased from veins through mineralized BIF and non-mineralized BIF...simply, mafic schist) and muscovite-chlorite-carbonate-quartz in the footwall, and quartz-chlorite-ferroan | | | Journal (article/letter/editorial) | sulphide–carbonate bands of millimetre- to centimetre scale. A footwall of sericite–carbonate–chlorite...associated with two generations of quartz–carbonate veins, dipping approximately 20° to 40° W. The first...second generation consists of large quartz–carbonate veins (group IIB), which locally crosscut the entire...orthogonal to the plane of mineralised, gently dipping veins, defining the Editorial handling: H. Frimmel N....conduits. The intersections of the mineralised veins and foliation planes of the host rock plunges approximately | | Kreissl, Stefan, Gerdes, Axel, Walter, Benjamin F., Neumann, Udo, Wenzel, Thomas, Markl, Gregor (2018) Reconstruction of a >200 Ma multi-stage “five element” Bi-Co-Ni-Fe-As-S system in the Penninic Alps, Switzerland. Ore Geology Reviews, 95. 746-788 doi:10.1016/j.oregeorev.2018.02.008 | Journal (article/letter/editorial) | markl@uni-tuebingen.de Abstract Hydrothermal five-element veins (Ag-Co-Ni-Bi-As) are mineral successions of native...base-metal systems (sulfide-rich) to five-element veins (sulfide-poor) and revealed the importance of h...mineralogical, and textural features of five-element veins by changing metal contents, arsenic/sulfur activities...textures indicate that the oxidation of primary siderite to magnetite was the redox couple to precipitate...by water-rock interactions (i.e. cover rocks: carbonate, sulfate and halite dissolution; basement rocks: | | Mao, Jingwen, Wang, Yitian, Li, Houmin, Pirajno, Franco, Zhang, Changqing, Wang, Ruiting (2008) The relationship of mantle-derived fluids to gold metallogenesis in the Jiaodong Peninsula: Evidence from D–O–C–S isotope systematics. Ore Geology Reviews, 33 (3) 361-381 doi:10.1016/j.oregeorev.2007.01.003 | Journal (article/letter/editorial) | Fig. 2. Geological plan showing the quartz ore veins and dykes in the Linglong gold camp (modified from...that are spatially associated with mineralised veins. The dominant structures in the Jiaodong area are...along these faults, which are filled by quartz veins and lamprophyre, diabase and porphyritic diorite...margins, with the ores composed of pyrite–quartz veins and pyrite–sericite– quartz altered rocks. The Jiaodong...native-gold–polymetallic sulfides, and 4) pyrite–quartz–carbonate. Fan et al. (2003) also suggested four stages | | | 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) | in BIF by hypogene carbonate minerals, followed by the dissolution of the carbonate and concentration...fluids. In contrast, the fluids responsible for carbonate alteration at the Matthew Ridge, Koolyanobbing...98 °C) of these fluids led to dissolution of carbonate minerals and concentration of magnetite. Dated...Paleoproterozoic. Later specular hematite-rich veins that cut and modify magnetite ores crystallized...primary quartz bands by hypogene carbonate minerals, followed by carbonate dissolution and concentration | | | Journal (article/letter/editorial) | rudnykh mestorozhdeniy, 1991, No. 1, pp. 33-43. Carbonate rocks are minor but significant components of...emplacement of the complex pluton. Occurrence of alkali carbonate minerals are associated with agpaitic mineralization...an immiscible alkali carbonate melt. Rheomorphic carbonatite and late calcite veins formed at the stage...nepheline syenite [16]. Carbonatite and Late Carbonate Veins of Khibiny In 1969, a borehole into the eastern...foyaite with carbonate veins up to 7 m in apparent thickness. The composition of the carbonate veins proved | | | Journal (article/letter/editorial) | mineralization occurs in horizons as well as in veins in the Permian formations near Novoveskfi Huta....and 813C from - 6 . 3 to -2.5%0 in quartz-carbonate veins with Cu mineralization suggesting a deep source...120 ~ C, according to fluid inclusions. Younger veins with Cu mineralization were formed 115 _+ 10 Ma...U-Mo horizons, 2 - Cu sandstones horizons, 3 - Cu veins and U - M o stockwork mineralization 59 S III~DOQOIO@o~O~...conglomerates, sandstones, aleurolites (often with carbonate concretions), tuffites, tufts and volcanics. Sedimentation | | | Journal (article/letter/editorial) | 6, pp. 513–545. Arkachan: A New Gold–Bismuth–Siderite–Sulfide Type of Deposits in the West Verkhoyansky...O, S) in minerals of the Arkachan gold–bismuth–siderite–sulfide deposit have been studied. The deposit...are extended (>2 km) and steeply dipping zones of veins and veinlets are hosted in Carbonaceous and Permian...The orebodies are largely composed of quartz and siderite; arsenopyrite, pyrite, and pyrrhotite are widespread;...1060 bar. The δ18O of quartz II associated with siderite I, native gold, and sulfosalts changes from +13 | | | Journal (article/letter/editorial) | deposit fine-grained sediments like clay and carbonate material into cracks within the fault zone. Such...Such crack-fill finegrained material, calcite veins, and oxidized/weathered open cracks are well observed...fine-grained materials are mainly composed of siderite, calcite, laumontite, and fine-grained clasts...Isotopic analyses of carbonate material within the fine-grained materials and calcite veins reveal variable...these crack-fill fine-grained materials and calcite veins and brown open cracks were developed by the repeated | | | Journal (article/letter/editorial) | ................ A singlesimplevein with one carbonate.............................. Vein systemsand...Rearrangement of carbonate ........................................ Replacementveins of carbonate.............next to quartz,the mostcommongangueminerals in veins. They do not show the uniformity that quartz doesin...importantcarbonateganguemineralsin veins are calcite,dolomite,ankerite, siderite,manganosiderite, and rhodochrosite...zones in ancient rocksare in a sensereplacement veins,includedhere: and someare rather extensiveand not | | | Journal (article/letter/editorial) | progressive metamorphism of greenalite andror siderite and do not reflect ‘oxide facies iron formation’...quartz-rich fraction occurs in deformed and metamorphosed veins associated with the mineralization. Gold is concentrated...association with abundant deformed and metamorphosed veins composed of quartz–albite–grunerite–ankerite–sulfides...association can form is by the metamorphism of carbonate-bearing alteration systems in Fe-rich rocks. The...metapelite unit. ‘Cherty quartz bands’, amphibole–carbonate rich rocks, and magnetite-rich units are all interpreted | | van Ryt, Matthew R., Sanislav, Ioan V., Dirks, Paul H.G.M., Huizenga, Jan M., Mturi, Marwa I., Kolling, Sergio L. (2017) Alteration paragenesis and the timing of mineralised quartz veins at the world-class Geita Hill gold deposit, Geita Greenstone Belt, Tanzania. Ore Geology Reviews, 91. 765-779 doi:10.1016/j.oregeorev.2017.08.023 | Journal (article/letter/editorial) | paragenesis and the timing of mineralised quartz veins at the worldclass Geita Hill gold deposit, Geita...paragenesis and the timing of mineralised quartz veins at the world-class Geita Hill gold deposit, Geita...paragenesis and the timing of mineralised quartz veins at the world-class Geita Hill gold deposit, Geita...alteration paragenesis; greenstone belt; quartz veins; Tanzania Abstract The world-class Geita Hill...mineralised quartz veins that trend approximately E-W. The mineralised quartz veins are accompanied by | | | Journal (article/letter/editorial) | carbonatite) in the Fen central complex, Telemark (South Norway) TOM ANDERSEN Institu tt .(br Geologi, L,~ffversitetet...~ffversitetet i Oslo. Box 104 7. Blindern, N-Oslo 3 (Norway) LITHOS 0 Andersen, T., 1984. Secondary processes...carbonatite) in the Fen central complex, Telemark (South Norway). Lithos, 17: 227-245. In the Fen complex, hem...reequilibrated carbonatite in the Fen complex, Norway. The r~bdberg of the Fen complex (literally: "redrock"...increase towards the eastern boundary. Thin, irregular veins of massive and disseminated hematite ores are scattered | | Fox, David C.M., Spinks, Samuel C., Pearce, Mark A., Barham, Milo, Le Vaillant, Margaux, Thorne, Robert L., Aspandiar, Mehrooz, Verrall, Mike (2019) Plundering Carlow Castle: First Look at a Unique Mesoarchean-Hosted Cu-Co-Au Deposit. Economic Geology, 114 (6) 1021-1031 doi:10.5382/econgeo.4672 | Journal (article/letter/editorial) | hosted in sulfide-rich quartz-carbonate veins. The ore is hosted in veins that occur within a pervasively...volcano-sedimentary sequence. Within the mineralized veins the dominant ore minerals are pyrite (FeS2), chalcopyrite...where mineralization occurs in quartz-carbonate and sulfide veins through brecciated and sheared host rock...deformation at Carlow Castle, where quartz and sulfide veins within the Carlow Castle ore zone are intensely...series of disseminated to discordant quartzsulfide veins. The timing of these structures relative to the | | | Journal (article/letter/editorial) | mineralization (98.5 ± 1 Ma, Ar–Ar). Ag–Sb ore veins of the third group are located within tin ore clusters...stockwork ore bodies represented by quartz–siderite veins or vein zones with Cu, Pb, Ag, and Bi sulfosalts...Vein minerals Siderite, quartz, calcite, ankerite, ± fluorite 200−400 0.3−16 Siderite, calcite, quartz...canfieldite, franсkeite, cassiterite Quartz, siderite, ankerite Siderite, barite, quartz, dolomite, calcite,...Inary, Burevestnik in Deputatsky ore cluster Siderite, quartz, calcite, ankerite, ±fluorite Ag content |
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