 | | Journal (article/letter/editorial) | | metamorphic zone are dominated by a brannerite-anatase-apatite assemblage and are low in uranium. The...seams are cut by premetamorphic quartzchlorite veins. Examples at higher metamorphic grade have textures...HYDROTHERMAL ALTERATION Epidote (from HYMAP images) Carbonate-iron oxide (Bain et al., 1992; NE part of map...of epidote (HYMAP data: Yang et al., 2000) and carbonate-iron oxide alteration zones (from Bain et al....siltstones, mudstones, and shales, with varying carbonate and siliclastic components, which were deposited |  | | Journal (article/letter/editorial) | | before they were folded. TAuB~ suggests that the ore veins may be carbonatites and expressed surprise at my...place there is nothing unusual about quartz carbonate veins containing sulphides, and secondly a considerable...to describe the ore veins, I take it to apply only to a high temperature carbonate magma associated with...throughout the Golden Dyke rocks; rutile, sphene, and anatase occur frequently in the sediments. Vanadium is...Dyke rocks it would be surprising indeed if a carbonate vein within the formation did not contain traces |  | | Journal (article/letter/editorial) | | quartz-carbonate-tourmaline veins occur mainly in the mylonite zone. The ore minerals of the veins and their...fluid inclusion data from auriferous type 2 quartz veins (qv 2) indicate aqueous-carbonic inclusions with...of MgO, CaO, and SiO2 from the wall rock to the veins accompanying gold mineralization. Chondritenormalized...of pyrite and ore stage carbonate, fluid inclusion data of auriferous veins, and to discuss the possible...and references therein). The auriferous quartz veins of the ANS are closely associated with greenschist |  | | Report (issue) | | _______________________________________________ Carbonate rock of Iron Hill___________________________________...___________________-____--_-_-__..__._-_ Quartz veins-_------_------__------------------_-__------Rocks...--_-------------------_---------_-_-------Carbonate veins.-___________________-_-_--_.--__-_____-___...TABLE 1. Niobium content of 11 samples of veins and carbonate rocks, Powderhorn district_____________...mineralized shear zones and carbonate veins.-------_-_-_ 3. Analyses, in percent, of carbonate rock containing rare-earthbearing |  | | Journal (article/letter/editorial) | | intergrown with Cu mineralization in Cu-bearing veins in the Hubi-type copper (cobalt) deposits. This...Monazite crystals separated from Cu-bearing carbonate veins within the orebody of Tongmugou yield a weighted...amount of Cu-bearing sulfide within molybdenite veins along the fault from the Hubi-type copper (cobalt)...mineralization. Recently, chalcopyrite in Cu-bearing quartz veins of the Hubi-type copper (cobalt) deposits yielded...metamorphic rock series of sandy-argillaceous and carbonate rocks affected by regional metamorphism, such |  | | Other Paper | | the 1870s, other minerals added to the list were anatase described by Koenig (1876) and altered biotite...actually pay for and remove from the location. The veins were in very tough white Arkansas Novaculite. Mr...radioactivity associated with the smoky quartz veins. It turned out the radioactivity was due to thorium...1990’s and numerous small deep blue anatase crystals found in quartz veins during the late 1990’s (Estes,...occur in scattered irregular areas with nests of carbonate-apatite needles. The contact zone of the carbonatite |  | | Journal (article/letter/editorial) | | chlorite increases whereas the iron content of the carbonate decreases from the mineralized zone outwards....hydrothermal alteration characterized by the presence of carbonate, sericite, chlorite, fuchsite and pyrite. However...titanomagnetite to an assemblage composed of leucoxene-anatase-sphene. Primary (sub-ophitic and panidiomorphic)...intense alteration process. At least two types of carbonate have been produced; calcite and ankerite. The...weathering surface. The ankeritic composition of the carbonate has been confirmed by electron microprobe analyses |  | | Report (issue) | | left, Ilmenite open pit mine at Tellnes, Sokndal, Norway. Photograph courtesy of Mike Norton/CC-BY-SA-3...titanomagnetite and leucoxene) and rutile (including anatase and brookite). ..................................ore minerals, although other minerals, including anatase, perovskite, and titanomagnetite, could have economic...minerals is currently dominated by Australia, Canada, Norway, and South Africa; additional amounts are produced...rather, a finely crystalline aggregate of rutile, anatase, or brookite with greater than 70 percent TiO2 |  | | Journal (article/letter/editorial) | | Sets of quartz-carbonate veins occur which were formed before the folding: vertical veins, parallel to...cleavage, are apparently undeformed; while horizontal veins, perpendicular to the cleavage, are folded parallel...ROBERTS suggests that early (diagenetic) quartz-carbonate veins are "compressed during compaction of the sediments"...inferred by ROBERTS' statement. II. Carbonate Dykes Two dykes of carbonate rock, a "dolomitic dyke" and a...ROBERTShas erred in his descriptions of the minerals anatase and apatite. These minerals, while they may occur |  | Jutras, P., Macrae, A., Owen, J. V., Dostal, J., Préda, M., Prichonnet, G. (2006) Carbonate melting and peperite formation at the intrusive contact between large mafic dykes and clastic sediments of the upper Palaeozoic Saint-Jules Formation, New-Carlisle, Quebec. Geological Journal, 41 (1) 23-48 doi:10.1002/gj.1031 | Journal (article/letter/editorial) | | interscience.wiley.com). DOI: 10.1002/gj.1031 Carbonate melting and peperite formation at the intrusive...the dykes appear to have promoted melting of carbonate components in calcareous sedimentary rock clasts...the Saint-Jules Formation, locally generating carbonate melts that contributed to the mingling of juvenile...2005; accepted 6 July 2005 KEY WORDS peperite; carbonate melting; upper Palaeozoic; mafic dykes; alteration;...sketch of the dyke localities at the bottom (C ¼ carbonate sample; FS ¼ fluidized sand sample (sandstone |  | | 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...to different metamorphosed and unmetamorphosed carbonate rocks. The author, however, suggests a hydrothermal |  | | Journal (article/letter/editorial) | | the metals mobilized may have formed mineralized veins of the type found in the surrounding region. Key...pervasive in some rocks, but limited to joints and veins in others. Contacts are gradational and commonly...minerals in the alteration zones, but muscovite, anatase, carbonates, hematite and pyrite have also been...grain boundaries. Quartz commonly fills narrow veins in the altered rocks. Downloaded by [TCU Texas...delineated by fine grained anatase and iron oxide. Kaolinite Carbonate minerals Kaolinite occurs as |  | Demartin, F., Gramaccioli, C. M., Campostrini, I., Diella, V. (2008) THE CRYSTAL STRUCTURE OF MCKELVEYITE-(Y)-2M, A NEW MONOCLINIC POLYTYPE FROM VAL MALENCO, ITALIAN ALPS. The Canadian Mineralogist, 46 (1) 195-203 doi:10.3749/canmin.46.1.195 | Journal (article/letter/editorial) | | Val Malenco, Lombardy, Italy, associated with anatase, brookite, brucite, calcite, dolomite, ilmenite...quartz, redledgeite and rutile, in hydrothermal carbonate veins intercalated in ultrabasic rocks and dolomitic...dans le Val Malenco, Lombardie, Italie, associé à anatase, brookite, brucite, calcite, dolomite, ilménite...Lombardy, northern Italy, within hydrothermal carbonate veins intercalated in ultrabasic rocks and dolomitic...lindsleyite and redledgeite, occurring together with anatase, brookite, brucite, calcite, dolomite, ilmenite |  | Sindern, S., Havenith, V., Gerdes, A., Meyer, F. M., Adelmann, D., Hellmann, A. (2019) Dating of anatase-forming diagenetic reactions in Rotliegend sandstones of the North German Basin. International Journal of Earth Sciences, 108 (4) 1275-1292 doi:10.1007/s00531-019-01705-x | Journal (article/letter/editorial) | | 1007/s00531-019-01705-x ORIGINAL PAPER Dating of anatase‑forming diagenetic reactions in Rotliegend sandstones...conditions controlling authigenic formation of anatase and in situ LA-ICP-MS U–Pb isotope dating of this...Rotliegend II sandstones from two wells in NW-Germany. Anatase grew after breakdown of detrital Ti-phases (e.g...condensed hydrocarbons cannot be ruled out. The anatase-forming reaction marks the change from a regime...fluids but precisely mark diagenetic growth of anatase at 224.3 + 5.1/− 5.6 Ma in a Tera-Wasserburg plot |  | | Journal (article/letter/editorial) | | repetition of the phyllite (unit 29) and the carbonate rocks (unit 28, or the Alkhornet Group of Harland...could account for the duplication of the phyllite-carbonate sequence [35]. A small ENE–WSW trending normal...the contact zone. Site DAUST3 (D) Metadolerite/carbonate contact zone with metacarbonates and metadolerites...the contact zone. Site DAUST3 (D) Metadolerite/carbonate contact zone with zone. Site DAUST3 (E) Metacarbonates...interleaved with strongly crenulated chlorite-carbonate rich phyllites and quartzites. The trend of the |  | | Journal (article/letter/editorial) | | minerals reported from Halls Gap geodes include anatase, calcite, chalcocite, chalcopyrite, dolomite, galena...cavities, geodes and veins in limestones and dolomites, ore-bearing carbonate veins, and as an alteration...masses of capillary crystals in geodes and carbonate veins in Paleozoic sedimentary rocks from numerous...New Mexico. It has also been reported in calcite veins with violarite in a quarry in Benton County and |  | | Journal (article/letter/editorial) | | unstable. After lithification the carbonate-quartz-sulphide veins were zones of weakness along which...quartz sandstone, and conglomerate. Host Rocks Carbonate analyses show that the host rocks range from about..."Vorgraphit", a precursor of true graphite. Patches of anatase up to 1.5 m across are common; these appear to...Woodcutters FIG. 3 39 CLASSIFICATION BASED ON CARBONATE ANALYSES OF 91 SAMPLES OF ROCKS FROM WOODCUTTERS...°C, and certainly no higher than 200 °C. Small veins of coarse grained dolomite, silica, and sulphide |  | | Journal (article/letter/editorial) | | hand-specimen and often carries spherulitic rhombohedral carbonate ; " marl " is a common term in North Staffordshire...by the presence of fragments wherein the quartz veins are elongated in a common direction and are sometimes...suggests that some material is derived from silica-veins or from amygdales in lava. There are scarce pieces...structureless green product ; there are tiny patches and veins of quartz. Phenocrysts are lacking ; the fragment...and manganese are also present ; some sideritic carbonate is discernible in slice and revealed by X-ray |  | Szabó-Krausz, Zsuzsanna, Aradi, László Előd, Király, Csilla, Kónya, Péter, Török, Patrik, Szabó, Csaba, Falus, György (2021) Signs of in-situ geochemical interactions at the granite–concrete interface of a radioactive waste disposal. Applied Geochemistry, 126. 104881pp. doi:10.1016/j.apgeochem.2021.104881 | Journal (article/letter/editorial) | | fractures are clogged, and multigen erational calcite veins are described (Balla et al., 2009), whereas others...2C instrument was used. The determination of carbonate content happened by a calcimeter, which works...is released in the analysis originating from carbonate minerals and ~5 wt% structural water is detected...concrete. 4.2. Results of imaging 4.2.1. Carbonate veins along or near the interface As described by...hydrothermal calcite veins frequently appear (Balla et al., 2009). These veins in granite were observed |  | | Report (issue) | | rims around magnetite; it is seen also to form veins in magnetite. The gangue minerals, which constitute...rocks. Microbreccias, partly healed by calcite veins that contain sulfides, are present throughout the...ore deposits, pegmatites, and late sulfide-carbonate veins of the Dover district. Potassium feldspar,...minerals that are minor constituents of the rocks are anatase, augite, biotite, bornite, chalcopyrite, chlorite...in rare-earth minerals, and in late sulfide-carbonate veins. Much of the magnetite apparently is homogeneous |  | Agangi, Andrea, Reddy, Steven M., Plavsa, Diana, Fougerouse, Denis, Clark, Chris, Roberts, Malcolm, Johnson, Tim E. (2019) Antimony in rutile as a pathfinder for orogenic gold deposits. Ore Geology Reviews, 106. 1-11 doi:10.1016/j.oregeorev.2019.01.018 | Journal (article/letter/editorial) | | namely felsic magmatic rocks and hydrothermal veins, and are therefore not diagnostic of Au mineralisation...rocks. The association of gold with quartz-carbonate veins is common to all the deposits, and hydrothermal...characterized by quartz, muscovite, chlorite, biotite, carbonate, fluorite, tourmaline, pyrite (Pirajno et al....Greenstone Belt occur as auriferous quartz-carbonate veins and sulfide bodies (Agangi et al., 2014; Anhaeusser...whereas minor free- gold is associated with quartz veins (Cabri et al., 1989; de Ronde et al., 1992). Gold |  | | Journal (article/letter/editorial) | | central Brazil , con sists of quartz--earbonate veins formed in a ductile shea r zone. Study of the sulphides...sulphides and gold-bearing quartz--earbonate veins and veinlets of the potassic hydrothermal alterati...agree that gold is paragenetically late in the veins (Ro bert 1991; Robert and Brown 1986a, 1986b). In...association . The gold is late introduced in the veins with a multi stage deposition. The Archaean Guarinos...quartz-carbonates (ankerite) veins and veinlet s in the potassic zone. The veins a re a few millimeters to |  | Zhao, Lixin, Dai, Shifeng, Graham, Ian T., Li, Xiao, Liu, Huidong, Song, Xiaolin, Hower, James C., Zhou, Yiping (2017) Cryptic sediment-hosted critical element mineralization from eastern Yunnan Province, southwestern China: Mineralogy, geochemistry, relationship to Emeishan alkaline magmatism and possible origin. Ore Geology Reviews, 80. 116-140 doi:10.1016/j.oregeorev.2016.06.014 | Journal (article/letter/editorial) | | lesser amounts of quartz and variable amounts of anatase, siderite and NU calcite; along with trace pyrite...Yunnan, the Luxi-Luoping oceanic trench and the carbonate platform of the Wuchiaping NU Formation developed...kaolinite, berthierine, and chamosite), quartz, anatase, calcite, MA siderite and hematite, while under...chalcopyrite, and REE-bearing carbonate and phosphate (Ce-Nd- D carbonate, rhabdophane and florencite)...amounts of anatase and calcite (Table 2; Fig. 4). The unmineralized AC samples contain more anatase and berthierine |  | Zhao, Lixin, Dai, Shifeng, Graham, Ian T., Li, Xiao, Zhang, Beibei (2016) New insights into the lowest Xuanwei Formation in eastern Yunnan Province, SW China: Implications for Emeishan large igneous province felsic tuff deposition and the cause of the end-Guadalupian mass extinction. Lithos, 264. 375-391 doi:10.1016/j.lithos.2016.08.037 | Journal (article/letter/editorial) | | setting Southwest China was covered by the marine carbonate Maokou Formation of Middle Permian age (Feng et...hematite (usually N2 mm in size), pyrite grains/veins, calcite veins and organic fragments/bands are commonly...Table 1; also see Zhao et al., 2017). Quartz and anatase were also detected as minor components in most...under the microscope (right); (C) calcite veins and pyrite veins in carb-mudstone (XD-14) and (D) hematite...identified in this study were ilmenite and anatase. Anatase is more abundant in the non-ore samples than |  | Biagioni, Cristian, Orlandi, Paolo, Pasero, Marco, Nestola, Fabrizio, Bindi, Luca (2014) Mapiquiroite, (Sr,Pb)(U,Y)Fe2(Ti,Fe3+)18O38, a new member of the crichtonite group from the Apuan Alps, Tuscany, Italy. European Journal of Mineralogy, 26 (3) 427-437 doi:10.1127/0935-1221/2014/0026-2382 | Journal (article/letter/editorial) | | ‘adularia’ þ baryte veins embedded in schists, in association with allanite-(Ce), anatase, destinezite, gypsum...crystals, up to 5 mm in size, in quartz þ carbonate veins embedded in magnetite-rich dolostones, in association...crichtonite group found in quartz þ ‘adularia’ þ baryte veins embedded in the tourmaline- and pyrite-rich schists...a different kind of occurrence, that is in carbonate veins embedded in the dolostone. Chemical analyses...was found in vugs of quartz þ ‘adularia’ þ baryte veins embedded in tourmaline- and pyrite-rich schists |
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