 | Chiarenzelli, Jeffrey, Lupulescu, Marian, Robinson, George, Bailey, David, Singer, Jared (2019) Age and Origin of Silicocarbonate Pegmatites of the Adirondack Region. Minerals, 9 (9) 508 doi:10.3390/min9090508 | Journal (article/letter/editorial) | | amphibole, clinopyroxene, and scapolite within a calcite matrix. Crystals can reach a meter or more in long...rocks. Carbon and oxygen isotopic ratios from calcite plot within a restricted field away from igneous...sulfide minerals, within a calcite matrix. Weathering leading to dissolution of calcite facilitates the discovery...attributed to melting, oxygen and carbon isotopes in calcite as intermediate between crustal and mantle sources...patterns, and carbon and oxygen isotope ratios from calcite to constrain their origin and significance to the |  | | Journal (issue) | | kuboktaedrischer Galenit, dazu Chalkopyrit. Boldut Mine, Maramures, Rumänien. Höhe der Stufe ca. 6 cm, Sammlung...Sorrelllcrocoite.com Deutschland: Aus der Grube Concordia bei Niederfischbach und der Grube Grüne Au bei Schutzbach...Sibirien. Kanada: Aus der British Columbia Molybdenum Mine bei Kitsault stammen bunt angelaufene Kristalle...Länge in Kristalldrusen. Mexiko: Die Santa Catarina Mine, Guanajuato hat Akinit als feinnadelige Aggregate...gefüllte Drusen im Epidot/Andradit-Skarn der Kara No. l Mine, Hampshire District, Tasmanien liefern Aikinit-Nadeln |  | Oberthur, T., Melcher, F., Henjes-Kunst, F., Gerdes, A., Stein, H., Zimmerman, A., El Ghorfi, M. (2009) HERCYNIAN AGE OF THE COBALT-NICKEL-ARSENIDE-(GOLD) ORES, BOU AZZER, ANTI-ATLAS, MOROCCO: Re-Os, Sm-Nd, AND U-Pb AGE DETERMINATIONS. Economic Geology, 104 (7) 1065-1079 doi:10.2113/econgeo.104.7.1065 | Journal (article/letter/editorial) | | und Rohstoffe, Stilleweg 2, D-30655 Hannover, Germany Universität Frankfurt, Institut für Geowissenschaften...Geochemie, Altenhöferallee 1, D-60438 Frankfurt, Germany 3 AIRIE Program, Department of Geosciences, Colorado...rock types (e.g., diorites at Filon 7, Bou Azzer mine). Mineralization has been traced locally for ~1...0361-0128/98/000/000-00 $6.00 (Tarouni, Bou Azzer mine, Bou Azzer East). Further, sulfur isotope compositions...minerals occur either in quartz-carbonate (mainly calcite) gangue (Figs. 2, 3), or in the outer zones of |  | Wellmer, F. W., Reeve, E. J., Wentzlau, E., Westenberger, H. (1983) Geology and ore deposits of the Toqui District, Aysen, Chile. Economic Geology, 78 (6) 1119-1143 doi:10.2113/gsecongeo.78.6.1119 | Journal (article/letter/editorial) | | Bergbau,Postfach3724, 6000 Frankfurt (Main), West Germany Abstract The Toqui districtof southernChile c...Series.The stratigraphic equivalence of mantosat Concordia(Zn-Pn-Cu),Estatuas(Zn), and SanAntonio(Zn-Pb-Cu)...Zufiiga-Antolinareaand a subsidiaryone is inferred near Concordia. The major stratigraphicunits in the Toqui district...Ga!era Formation is a Miocene to Pliocene as Concordia where it has been intersected in drill sequenceof...alteredsubmarineandesitictuffsand agglomerates nio, Concordia, and Estatuas areas and the veins in (units2 to |  | Litvinenko, Andrey K., Sorokina, Elena S., Häger, Tobias, Kostitsyn, Yuri A., Botcharnikov, Roman E., Somsikova, Alina V., Ludwig, Thomas, Romashova, Tatiana V., Hofmeister, Wolfgang (2020) Petrogenesis of the Snezhnoe Ruby Deposit, Central Pamir. Minerals, 10 (5) 478 doi:10.3390/min10050478 | Journal (article/letter/editorial) | | Mainz (JGU), J.-J.-Becher-Weg 21, 55128 Mainz, Germany; esorokin@uni-mainz.de (E.S.S.); rbotchar@uni-mainz...Im Neuenheimer Feld 234-236, 69120 Heidelberg, Germany; thomas.ludwig@geow.uni-heidelberg.de Correspondence:...muscovite + phlogopite + margarite; (4) calcite. The ruby + calcite association is the most economically...Geowissenschaften, Johannes Gutenberg-Universität Mainz (JGU), Germany. The samples were ablated using a spot size of...Geowissenschaften, Johannes Gutenberg-Universität Mainz (JGU), Germany using a Zeiss DSM 962 SEM coupled with an Oxford |  | | Journal (article/letter/editorial) | | GeoForschungsZentrum Potsdam, Telegrafenberg, D-14473 Potsdam, Germany (Received October 16, 2000; accepted in revised...a 206Pb*/238U–207Pb*/235U (concordia) diagram to the right of the concordia. While samples that do not...should define a linear array that intersects the concordia curve at the age of diagenesis and at the age...cases makes the data appear discordant in the concordia diagram. Note that asterisks refer to data corrected...microcrystalline mixture of fluor-apatite and calcite, the dark bands are dominated be Fe-oxyhydroxides |  | | Journal (article/letter/editorial) | | minerals include kimzeyite (1), dolomite (2), calcite (6), apatite (13), baddeleyite (18) and zircon...uncertainties of all our analyses. Isochrons, concordia ages, discordia lines, weighted means and their...sövite Olivine-phlogopite sövite Sövite Sövite Calcite-dolomite carbonatite Phlogopite-amphibole sövite...Beforsite Dolomite-calcite carbonatite Biotite-zircon-apatite vein K-feldspar-apatite-calcite-biotite ijolite...ijolite Dolomite-calcite carbonatite Phlogopite-pyroxene phoscorite Pyrochlore-amphibole-apatite beforsite |  | Mueller, Andreas G., Hall, Gregory C., Nemchin, Alexander A., Stein, Holly J., Creaser, Robert A., Mason, Douglas R. (2008) Archean high-Mg monzodiorite–syenite, epidote skarn, and biotite–sericite gold lodes in the Granny Smith–Wallaby district, Australia: U–Pb and Re–Os chronometry of two intrusion-related hydrothermal systems. Mineralium Deposita, 43 (3) 337-362 doi:10.1007/s00126-007-0164-0 | Journal (article/letter/editorial) | | from a hematite-stained alkali feldspar–quartz– calcite assemblage and quartz–molybdenite–pyrite veins...01 g/t Au) anhydrite-bearing epidote–actinolite–calcite skarn, forming a 600-m-wide and >1,600-m-long replacement...altered to muscovite + calcite + pyrite. Skarn and syenite are cut by pink biotite–calcite veins, containing...veins are associated with red biotite–sericite–calcite–albite alteration in adjacent monzonite dikes.... which offset skarn, syenite, and the biotite–calcite veins by up to 25 m. The molybdenite Re–Os age |  | Mueller, Andreas G., McNaughton, Neal J., Muhling, Janet R. (2021) Albite ± Actinolite-Altered Porphyry Dykes in Archean Gold Deposits of the Boulder Lefroy-Golden Mile Fault System, Yilgarn Craton, Western Australia: Petrography, Chronology, and Comparison to Canadian Albitites. Minerals, 11 (11) 1288 doi:10.3390/min11111288 | Journal (article/letter/editorial) | | assemblages and isotope data (pyrite δ34 SCDT = 2.5‰, calcite δ13 CPDB = − 5.3‰) indicate replacement at peak...porphyries at the contact of chlorite-calciterite-calcite-biotite (chl-cal-bt) and talc-dolomite-phlogopite...2008: thefrom Main Porphyry separates chlorite-calcite schist and a biotite contact zone (Bt) from Porphyry...from talc-dolomite talc-dolomite schist. chlorite-calcite Flat quartz veins (white) movement planes. (d)...contactplanes. alteration (3–5 g/t Au) in at chlorite-calcite schist, (WP) Hampton Boulderbiotite pit incontact |  | Xu, Junwei, Liu, Xianghua, Lai, Jianqing, He, Hongsheng, Song, Xiangfa, Zhai, Degao, Li, Bin, Wang, Yuhua, Shi, Jian, Zhou, Xi (2022) In Situ U-Pb Geochronology of Calcite from the World’s Largest Antimony Deposit at Xikuangshan, Southern China. Minerals, 12 (7) 899 doi:10.3390/min12070899 | Journal (article/letter/editorial) | | minerals Article In Situ U-Pb Geochronology of Calcite from the World’s Largest Antimony Deposit at Xikuangshan...Shi, J.; Zhou, X. In Situ U-Pb Geochronology of Calcite from the World’s Largest Antimony Deposit at Xikuangshan...the first LA-MC-ICP-MS U-Pb ages of syn-stibnite calcite from this deposit. The dating results indicate...mineralization in the Xikuangshan ore district. The calcite-stibnite veins in the Daocaowan ore block probably...mineralization. The new calcite U-Pb ages are significantly younger than the calcite Sm-Nd ages (124.1 ± |  | Zhang, Shitao, Chen, Huayong, Shu, Qihai, Zhang, Yu, Chu, Gaobin, Cheng, Jiamin, Tian, Jing (2019) Unveiling growth histories of multi-generational garnet in a single skarn deposit via newly-developed LA-ICP-MS U Pb dating of grandite. Gondwana Research, 73. 65-76 doi:10.1016/j.gr.2019.04.003 | Journal (article/letter/editorial) | | has been reported recently, yet the accurate concordia 206Pb/238U ages and growth histories of multi...= 0.95), respectively. More importantly, two concordia 206 Pb/238U ages of 139.2 ± 0.6 CE Ma (2σ...enriched in U and can obtain the high-precision concordia U-Pb ages with higher andradite Mol%, euhedral...present LA-ICP-MS U-Pb isotope ages (including both concordia and lower intercept ages) and major and trace...post-ore carbonate (stage V, dominated by MA calcite and ankerite) and supergene process (stage VI, |  | Ntiharirizwa, Seconde, Boulvais, Philippe, Poujol, Marc, Branquet, Yannick, Morelli, Cesare, Ntungwanayo, Joël, Midende, Gilbert (2018) Geology and U-Th-Pb Dating of the Gakara REE Deposit, Burundi. Minerals, 8 (9) 394 doi:10.3390/min8090394 | Journal (article/letter/editorial) | | mineralization. See text for details. (A,C,D) Gasagwe mine road; (B) FK and garnet-rich para-gneisses hosting...field. Here we present the gitology of the Gasagwe mine and the most important REE occurrences recognized...explored in the Gakara claim (see Figure 1B for mine and occurrences locations). It has to be noticed... Figure 3. Structural sketch of the Gasagwe REE mine and stereogram of the REE-bearing veins (great circles... while the second set was standardized to the calcite standard WC-1 (another carbonate mineral). The |  | Filina, Maria I., Sorokina, Elena S., Botcharnikov, Roman, Karampelas, Stefanos, Rassomakhin, Mikhail A., Kononkova, Natalia N., Nikolaev, Anatoly G., Berndt, Jasper, Hofmeister, Wolfgang (2019) Corundum Anorthosites-Kyshtymites from the South Urals, Russia: A Combined Mineralogical, Geochemical, and U-Pb Zircon Geochronological Study. Minerals, 9 (4) 234 doi:10.3390/min9040234 | Journal (article/letter/editorial) | | Universität Mainz, J.-J.-Becher-Weg 21, 55128 Mainz, Germany; rbotchar@uni-mainz.de (R.B.); hofmeister@uni-mainz...Universität Münster, Corrensstrasse 24, 48149 Münster, Germany; jberndt@uni-muenster.de Correspondence: makimm@mail...metasomatites within meta-ultramafic host rocks (mine 418) (Figure 1) [3]. Minerals 2019, 9, x FOR PEER...plagioclase 4 of 25 (up to 20 wt. %). Additionally, calcite (up to 3 wt. %), cancrinite, and sodalite were...of research (up to 20 wt. %).is Additionally, calcite to 3 wt. %), cancrinite, and sodalite were identified |  | | Journal (article/letter/editorial) | | Geowissenschaften, Wilhelmstr. 56, D-72074 Tübingen, Germany *Corresponding author, e-mail: markl@uni-tuebingen...Geoforschungszentrum Potsdam, Telegrafenberg, D-14473 Potsdam, Germany Abstract: This study deals with the use of new...of southwest Germany. In detail, we present new U-Pb age data of ferberite (from Clara Mine), chalcedony...chalcedony (from Silberbrünnle Mine), agate (Geisberg), carneol (‘‘Markgräfler Land’’), and confirm earlier...chalcedony. 1. Introduction The Schwarzwald in SW Germany is part of the midEuropean Variscan orogen and |  | | Journal (article/letter/editorial) | | pitchblendeore from the PetrotomicsCompanysection9 open-pit mine and theWalker open-pitmineof the Kerr-McGeeCorpo-...Location map of Shirley Basin, shoxving various mine locations. 32 KENNETH R. LUD[VIG Sampling procedures...in and near a well-defined roll front exposed Calcite-cementedore: The two total ore samples in the•vallof...than 500 rag. Pctrographic descriptionof samples Calcite-cemented ore: This ore is unusual both in its...its high grade (12.3% U) and its texture. Calcite later section). The low 2aøTh/'ø'•sUvalue of the forms |  | | Journal (article/letter/editorial) | | ages, a Tera–Wasserburg Concordia intercept age and a Tera–Wasserburg Concordia intercept age anchored...232Th–208Pb, and common Pb-anchored Tera–Wasserburg Concordia intercept ages. © 2010 Elsevier B.V. All rights...age determinations is the need to use either 1) Concordia or isochron plots on a suite of cogenetic apatite...to define a well constrained linear array on a Concordia diagram or isochron. The Total-Pb/U isochron,...through the uncorrected data on a Tera–Wasserburg Concordia to determine the common Pb-component (y-intercept) |  | Wu, Fu-Yuan, Yang, Yue-Heng, Li, Qiu-Li, Mitchell, Roger H., Dawson, J. Barry, Brandl, Günther, Yuhara, Masaki (2011) In situ determination of U–Pb ages and Sr–Nd–Hf isotopic constraints on the petrogenesis of the Phalaborwa carbonatite Complex, South Africa. Lithos, 127 (1) 309-322 doi:10.1016/j.lithos.2011.09.005 | Journal (article/letter/editorial) | | compositions. In situ isotopic analyses of apatite, calcite, zircon and baddeleyite indicate that the primary...parent/daughter elemental ratios, such as apatite and calcite for Sr isotopes, and zircon and baddeleyite for...carbonate-bearing rocks not considered as carbonatites (calcite pyroxenites) by the IUGS modal classification scheme...Experimental studies have indicated the formation of calcite carbonatite magmas by partial melting of carbonated...consists mainly of pyroxenite, phoscorite, and calcite carbonatite and is transected by a suite of younger |  | Bell, Robin-Marie, Kolb, Jochen, Waight, Tod Earle, Bagas, Leon, Thomsen, Tonny B. (2017) A Palaeoproterozoic multi-stage hydrothermal alteration system at Nalunaq gold deposit, South Greenland. Mineralium Deposita, 52 (3) 383-404 doi:10.1007/s00126-016-0667-7 | Journal (article/letter/editorial) | | site of Greenland’s only operating metalliferous mine until its closure in 2014, having produced 10.67...minimum age for mineralisation. A hydrothermal calcite-titanite alteration assemblage is dated to ca....lower greenschist facies hydrothermal epidote-calcite-zoisite alteration assemblage with numerous accessory...Greenland, which operated as Greenland’s only metal mine from 2004 until its closure in 2014 after producing...basement Town Granite Gold occurrences Orthogneiss Mine Mafic volcanic rock Occurrence 48°W Danell Sârdloq |  | Bonnetti, Christophe, Liu, Xiaodong, Mercadier, Julien, Cuney, Michel, Deloule, Etienne, Villeneuve, Johan, Liu, Wenquan (2018) The genesis of granite-related hydrothermal uranium deposits in the Xiazhuang and Zhuguang ore fields, North Guangdong Province, SE China: Insights from mineralogical, trace elements and U-Pb isotopes signatures of the U mineralisation. Ore Geology Reviews, 92. 588-612 doi:10.1016/j.oregeorev.2017.12.010 | Journal (article/letter/editorial) | | uraninite veins associated with quartz, fluorite, calcite and pyrite. During Cretaceous-early Cenozoic crustal...the undergroung mine of the Shituling deposit and sample XXS1 in the underground mine of the Xianshi deposit...underground mine at level 223 m. Finally, ZM1 and ZM2 were sampled in the underground mine at level 150...GeoLas Pro ArF Excimer laser (Microlas®, Göttingen, Germany) equipped with beam homogenisation optics. Ablation...associated 20 with other gangue minerals such as calcite and fluorite. The distribution of the U minerals |  | Zhang, Di, Guo, Shun, Chen, Yi, Li, Qiuli, Ling, Xiaoxiao, Liu, Chuanzhou, Sein, Kyaing (2021) ~25 Ma Ruby Mineralization in the Mogok Stone Tract, Myanmar: New Evidence from SIMS U–Pb Dating of Coexisting Titanite. Minerals, 11 (5) 536 doi:10.3390/min11050536 | Journal (article/letter/editorial) | | study werebeen collected from Garnier an abandoned mine Kyatpyin the Mogok Tract 39 Ar Tract have published...Ma). Additionally, a zircon U–Pb date of posed calcite (>96 in vol.%), diopside (<1Ovol.%), and dolomite...titanite, <1.5 between leucogranite and marble (Wet Loo mine [39]). Zaw et al. [10,11] provided an age vol.%)...cmvia(Figure 2b–d).Seven The ruby typically contained of calcite, titanite, determined LA-ICP-MS. analyses of a...2e,g). No zonation was found in the titanite. Calcite may occur as a matrix mineral (Figure 2d), and |  | Liu, Peng, Mao, Jingwen, Santosh, M., Xu, Lingang, Zhang, Rongqing, Jia, Lihui (2018) THE XILING Sn DEPOSIT, EASTERN GUANGDONG PROVINCE, SOUTHEAST CHINA: A NEW GENETIC MODEL FROM 40Ar/39Ar MUSCOVITE AND U-Pb CASSITERITE AND ZIRCON GEOCHRONOLOGY. Economic Geology, 113 (2) 511-530 doi:10.5382/econgeo.2018.4560 | Journal (article/letter/editorial) | | granite adjacent to the southeastern part of the mine area yielded a U-Pb age of 145.8 ± 0.6 Ma. Hydrothermal...indicate that the volcanic-subvolcanic rocks in the mine area are genetically unrelated with the Xiling Sn...granite adjacent to the southeastern part of the mine area, these new ages constrain the timing of the...granodiorite porphyry occurs in the eastern part of the mine area, and the biotite granite and granite are mostly...southeastern, eastern, and northwestern parts of the mine area (Fig. 4G, H). The major structures in the Xiling |  | Potter, Naomi J., Ferguson, Matthew R. M., Kamenetsky, Vadim S., Chakhmouradian, Anton R., Sharygin, Victor V., Thompson, Jay M., Goemann, Karsten (2018) Textural evolution of perovskite in the Afrikanda alkaline–ultramafic complex, Kola Peninsula, Russia. Contributions to Mineralogy and Petrology, 173 (12) doi:10.1007/s00410-018-1531-9 | Journal (article/letter/editorial) | | Accepted: 9 November 2018 © Springer-Verlag GmbH Germany, part of Springer Nature 2018 Abstract Perovskite...Zak 1971). A carbonatitic suite, also known as calcite–amphibole–clinopyroxene rocks, occurs in the central...producing a succession from silicocarbonatites to calcite carbonatites (Chakhmouradian et al. 2008; Chakhmouradian...variations in the abundance of silicate minerals and calcite, reflecting extreme petrographic heterogeneity...(50–550 µm) and magnetite (0.2–1.5 mm), and cut by calcite and wollastonite veinlets. Inclusions of euhedral |  | | Journal (article/letter/editorial) | | with various combinations of apatite, stilbite, calcite, biotite, and less commonly titanite and monazite...generations of fractures, that are characterized by calcite and stilbite with distinctly radiogenic initial...(Flink, 1924) that include apatite, stilbite, calcite, K-feldspar, biotite, titanite, and rare monazite...hornblende, biotite, K-feldspar, apatite, stilbite, and calcite. Abundant stilbite indicates that these minerals...discordant and yield a scattered pattern in the concordia diagram (Fig. 3a). T h e highest 2°7pb/2°6pb age |  | | Journal (article/letter/editorial) | | THE NABABEEP NEAR WEST TUNGSTEN MINE, SOUTH AFRICA SouthAJrica P. G. Sonr.rct,O'okiepCopperCompany,Ltd...influenced mineralization in the Nababeep Near West mine and with the mineralogy of the ore. fNrnoDucrIoN...production, the largest of which rvas the Near West mine at Nababeep. At the end of World War II five had...separatesthe underlying Nababeep gneissfrom the Concordia gneissabove. The lower part of this stage consists...intrusive or of metasomatic origin. In the Near West mine are a few lenticular interbeds of dark augite-amphibole |  | Duncan, R. J., Stein, H. J., Evans, K. A., Hitzman, M. W., Nelson, E. P., Kirwin, D. J. (2011) A New Geochronological Framework for Mineralization and Alteration in the Selwyn-Mount Dore Corridor, Eastern Fold Belt, Mount Isa Inlier, Australia: Genetic Implications for Iron Oxide Copper-Gold Deposits. Economic Geology, 106 (2) 169-192 doi:10.2113/econgeo.106.2.169 | Journal (article/letter/editorial) | | nearby Squirrel Hills Granite. Molybdenite-bearing calcite veins that crosscut main-stage IOCG mineralization...22o30’ CSQ 2 1700 - 1725 Ma CSQ 3 1690 - 1650 Ma Mine Intrusives Williams/Naraku Batholith (1545-1500...titanites from similar samples near the Knobby Calcite Quarry in the Mary Kathleen fold belt gave ages...and consists of an early quartz-anhydrite-barite-calcite-hematite-Au assemblage that progressed to pyri...~35-m-thick magnetite-rich ironstone at the Starra 276 mine. The interval for this sample grades 1.62 g/t Au |
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