 | | Journal (article/letter/editorial) | | Skarns in the Riba de Alva Mine, Northeastern Portugal L. MIGUEL GASPAR† Departamento de Geologia, Faculdade...Faculdade de Ciências, Universidade de Lisboa, Bloco C2, Campo Grande, 1700 Lisboa, Portugal AND CARLOS...Lisboa, Portugal Abstract The metasediment-hosted distal scheelite skarns from the Riba de Alva mine, Barca...Barca de Alva-Escalhão region, northeastern Portugal, consist of three main levels of strata-bound, boudin-shaped...scheelite + fluorite + calcite ± labradorite ± apatite ± Fe axinite ± armenite ± scapolite; and late-stage |  | Köhler, Martin, Hanelli, Delira, Schaefer, Stefan, Barth, Andreas, Knobloch, Andreas, Hielscher, Peggy, Cardoso-Fernandes, Joana, Lima, Alexandre, Teodoro, Ana C. (2021) Lithium Potential Mapping Using Artificial Neural Networks: A Case Study from Central Portugal. Minerals, 11 (10) 1046 doi:10.3390/min11101046 | Journal (article/letter/editorial) | | Artificial Neural Networks: A Case Study from Central Portugal Martin Köhler 1, * , Delira Hanelli 1 , Stefan...Artificial Neural Networks: A Case Study from Central Portugal. Minerals 2021, 11, 1046. https://doi.org/10.3390/min...Sciences, University of Porto, 4169-007 Porto, Portugal; joana.fernandes@fc.up.pt (J.C.-F.); allima@fc... Pole of University of Porto, 4169-007 Porto, Portugal Correspondence: martin.koehler@beak.de Abstract:...1200 km2 in the surroundings of Bajoca Mine (Northeast Portugal). Extensive knowledge about geological |  | Alaminia, Zohreh, Mehrabi, Behzad, Razavi, Seyed Mohammad Hossein, Tecce, Francesca (2020) Mineral chemistry, petrogenesis and evolution of the Ghorveh-Seranjic skarn, Northern Sanandaj Sirjan Zone, Iran. Mineralogy and Petrology, 114 (1) 15-38 doi:10.1007/s00710-019-00688-6 | Journal (article/letter/editorial) | | garnet+ clinopyroxene +vesuvianite+scheelite±apatite+calcite±pyrrhotite; stage III, amphibole+vesuv...titanite, pyrrhotite, pyrite, chalcopyrite and apatite as subordinate or accessory minerals. Based on...minerals from the intrusion (e.g. orthoclase, apatite and pyrite). Garnet is locally developed by replacement...Plagioclase crystals are commonly associated with apatite showing distinct sericitization. Clinopyroxene...similar to those reported in amphiboles from Riba de Alva (Gasper and Inverno 2000) and Cantung E-zone |  | | Journal (article/letter/editorial) | | 3053, Australia BULLETIN DE LA SOCIETE GEOLOGIQUE DE FRANCE Société Géologique de France, 77, rue Claude-Bernard...Verlag Jena, PF 10537, D 07705 Jena, Germany CHRONIQUE DE LA RECHERCHE MINIERE Editions du BRGM, B.P, 6009...Serviços Geológicos de Portugal, Rua da Academia das Ciências, 19-2°, 1200 Lisbon, Portugal CONTRIBUTIONS...Tokyo, 107 Japan REVISTA GEOLOGICA DE CHILE Servicio Nacional de Geología y Minería, Avenida Santa Maria...SCIENCES GEOLOGIQUES Institut de Géologie, Université Louis Pasteur de Strasbourg, 1, rue Blessig, F-67084 |  | | Journal (article/letter/editorial) | | silicates in a W-(Sn) skarn close to Felbertal tungsten mine, Eastern Alps Alexander Ordosch 1,2 & Johann G...AG (WBH AG), the company operating the Felbertal mine, decided to re-explore scheelite showings at Messelingscharte...further to the north (e.g., at the Felbertal scheelite mine) its base is formed by the Basal Schist. There,...silicates in a W-(Sn) skarn close to Felbertal tungsten mine, Eastern... Kaprun Mittersill Vienna Uttendorf...following standards and lines were used for scheelite: apatite (Ca Kα), W metal (W Lα), PtSn alloy (Sn Lα), strontianite |  | Shabeer, K. P., Okudaira, T., Satish-Kumar, M., Binu-Lal, S. S., Hayasaka, Y. (2003) Ca-W metasomatism in high-grade matapelites: an example from scheelite mineralization in Kerala Khondalite Belt, southern India. Mineralogical Magazine, 67 (3) 465-483 doi:10.1180/0026461036730111 | Journal (article/letter/editorial) | | granoblastic matrix (quartz + garnet + plagioclase + apatite) or in strings parallel to relict foliation of...biotite akes within a quartzo-feldspathic matrix de ne the foliation in unmigmatized portions. The mineralized...mineral inclusions) and quartz, along with accessory apatite. Pyrite forms the dominant sulphide mineral associated...plagioclase, garnet and quartz together with apatite and sulphides. Apatite, occurring as euhedral crystals with...garnet (Grt) + Plagioclase (Plg) + quartz (Qtz) + apatite (Apt). 468 CA-W METASOMATISM IN HIGH-GRADE MATAPELITES |  | Tornos, F., Galindo, C., Crespo, J. L., Spiro, B. F. (2008) GEOCHEMISTRY AND ORIGIN OF CALCIC TUNGSTEN-BEARING SKARNS, LOS SANTOS, CENTRAL IBERIAN ZONE, SPAIN. The Canadian Mineralogist, 46 (1) 87-109 doi:10.3749/canmin.46.1.87 | Journal (article/letter/editorial) | | y Minero de España, c/Azafranal 48, E–37001 Salamanca, Spain Carmen GALINDO Departmento de Petrología...Petrología y Geoquímica, Universidad Complutense de Madrid, E–28040 Madrid, Spain José Luis CRESPO SIEMCALSA...System, Los Santos deposit, Spain. Sommaire La skarn de Los Santos, mésozonale, calcique et réductrice, affleurant...la Zone Ibérique Centrale, constitue un gisement de tungstène à tonnage limité mais à teneur élevée se...valeurs de d18O du grenat et du clinopyroxène dans la skarn prograde indiqueraient des valeurs d18O de la |  | | Journal (article/letter/editorial) | | strata-bound scheelite skarns in the Riba de Alva Mine, Northeastern Portugal. Econ. Geol. 95, 1259–1275. Gize...porphyry–skarn–stratabound Cu–Au–Mo–Fe and magnetite–apatite deposits along the Middle–Lower Yangtze River Valley |  | Song, Shiwei, Mao, Jingwen, Xie, Guiqing, Yao, Zaiyu, Chen, Guohua, Rao, Jianfeng, Ouyang, Yongpeng (2018) The formation of the world-class Zhuxi scheelite skarn deposit: Implications from the petrogenesis of scheelite-bearing anorthosite. Lithos, 312. 153-170 doi:10.1016/j.lithos.2018.05.002 | Journal (article/letter/editorial) | | (Anavg=91, ~90 vol.%) + scheelite (~3 vol.%) + apatite (~2.5 vol.%) + ilmenite (~1.5 vol.%) + titanite...mineralization in the Zhuxi mine. Keywords: Scheelite-bearing anorthosite; Petrogenesis; Apatite; Residual magma...the abundant tungsten mineralization in the Zhuxi mine are not well understood. Notably, a quartz-free...plagioclase (~90 vol.%)+ scheelite (~3 vol.%) + apatite (~2.5 vol.%) + ilmenite (~1.5 vol.%) + titanite...trace element characteristics of plagioclase, apatite, NU titanite, ilmenite, and prehnite, we decipher |  | | Journal (article/letter/editorial) | | Camiboğazı. The Fe skarn deposit contains an amount of mine waste covering an area of 5000 m2 but has no reserve...currently in production. Thus, the situ- ation of the mine has changed over time, and many parts of it are...ÇOĞULU 1975, MOORE et al. 1980 and fission track on apatite: BOZTUĞ et al. 2004, Fig. 1). Rocks belonging to...(augite), in decreasing abundance; sphene and apatite occur as accessory minerals. The granitoids generally...zoning, described and interpreted in garnets from Ocna de Fier skarns (CIOBANU & COOK 2004) and the Southwest |  | Li, Xiao-Yu, Gao, Jian-Feng, Zhang, Rong-Qing, Lu, Jian-Jun, Chen, Wen-Hui, Wu, Jin-Wei (2018) Origin of the Muguayuan veinlet-disseminated tungsten deposit, South China: Constraints from in-situ trace element analyses of scheelite. Ore Geology Reviews, 99. 180-194 doi:10.1016/j.oregeorev.2018.06.005 | Journal (article/letter/editorial) | | Minor amounts of apatite formed in both stages of mineralization. Stage I apatite contains 1370–1930...1370–1930 ppm Mn and 97.7–127 ppm Sr, whereas Stage II apatite has lower Mn (111–158 ppm) and higher Sr (2170–4690...trace elements compositions of the scheelite and apatite from the two stages identify two ore-forming fluids...Sanxianba granitic porphyry. Precipitation of early apatite and scheelite, as well as plagioclase decomposition...(Fig. 3a). Accessory minerals include zircon, apatite, ilmenite, and monazite (Fig. 3c). In the east |  | Mateus, António, Figueiras, Jorge, Martins, Ivo, Rodrigues, Pedro, Pinto, Filipe (2020) Relative Abundance and Compositional Variation of Silicates, Oxides and Phosphates in the W-Sn-Rich Lodes of the Panasqueira Mine (Portugal): Implications for the Ore-Forming Process. Minerals, 10 (6) 551 doi:10.3390/min10060551 | Journal (article/letter/editorial) | | Phosphates in the W-Sn-Rich Lodes of the Panasqueira Mine (Portugal): Implications for the Ore-Forming Process...4 * and Departamento de Geologia, Faculdade de Ciências da Universidade de Lisboa, Ed. C6, Piso 4,... Campo Grande, 1749-016 Lisboa, Portugal; jfigueiras@fc.ul.pt (J.F.); pcrodrigues@fc.ul.pt (P.C.R.) Instituto...Faculdade de Ciências da Universidade de Lisboa, Ed. C1, Piso 0, Campo Grande, 1749-016 Lisboa, Portugal; ijmartins@fc...6225-051 Barroca Grande, Portugal; filipe.pinto@beraltportugal.pt Instituto de Ciências da Terra (ICT) |  | | Book | | approximately 5 cm taii and is from the Eagle's Nest mine, Piacer County, California. Ross Beaty Collection...parties de ses publicatJOnS pour let..- usage interne au person,el. ou rosage inteme ou personnel de cllenls...obtenu prealablemt.'fll une ltcanca it eel effet de CANCOPY (Canadian Copyright LJcenstng Agency), One...reprodudion pour fins de cistrhrtion ~ . de publicite ou de promotion, pcl.lr la confed.10n de nouveaux travaux...c:oleciifs ou par la revede cette nature, on doit au prealable convenir d'en-tentes |  | | Journal (article/letter/editorial) | | 1992; Large et al., 2001; Allen and Weihed, 2002; De Ronde et al., 2005; Stoffers et al., 2006; Bradshaw...hornblende. The accessory minerals include titanite, apatite and zircon. The rock type of the porphyry varies...calderas (Stoffers et al., 2006) or volcanic edifice (de Ronde et al., 2005). Fig. 18 schematically depicts...analysis. Geochimica et Cosmochimica Acta 27, 43–52. De Ronde, C.E.J., Hannington, M.D., Stoffers, P., et...strata-bound scheelite skarns in the Riba de Alva mine, northeastern Portugal. Economic Geology 95, 1259. Ghose |  | Zhang, Weifeng, Chen, Huayong, Peng, Lianhong, Zhao, Liandang, Lu, Wanjian, Zhang, Zengjie, Yang, Juntao, Sun, Jie (2018) Ore genesis of the Duotoushan Fe-Cu deposit, Eastern Tianshan, NW China: Constraints from ore geology, mineral geochemistry, fluid inclusion and stable isotopes. Ore Geology Reviews, 100. 401-421 doi:10.1016/j.oregeorev.2017.02.021 | Journal (article/letter/editorial) | | and accessory minerals (1%) such as zircon and apatite, is intruded into dacitic tuff. 8 Along the...representative pyrite samples collected from underground mine workings and drill cores. Pyrite was hand-picked...identified in many skarn deposits (e.g., Empire Cu-Zn Mine, Chang and Meinert, 2008; Coroccohuayco deposit...Chang, Z.S., Meinert, L.D., 2008. The Empire Cu-Zn Mine, Idaho: exploration implications of unusual skarn...strata-bound scheelite skarns in the Riba de Alva mine, northeastern Portugal. Econ. Geol. 95, 1259‒1275. Hanley |  | | Journal (article/letter/editorial) | | (9.1%), hornblende (0.3%), epidote (0.1%), and apatite and opaque minerals (1.0%) such as magnetite and...stratabound scheelite skarns in the Riba de Alva Mine, Northeastern Portugal. Econ. Geol. 95, 1259–1275. Harlov...C., 2012. Skarn gold mineralization at the Geodo mine, South Korea. Econ. Geol. 107, 537–551. Kim, E.J...skarn zonation, and skarn textures at the Geodo Mine in the Taebaeksan Basin, South Korea. Geosci. J...magnesian skarn-type iron deposits of the Janggun mine, Republic of Korea. Mineral. Deposita 33, 379–390 |  | | Journal (article/letter/editorial) | | Anothoclase Anthophyllite Antimonselite Antimony native Apatite Apophyllite Aragonite Ardennite Arfvedsonite Argentite...hanging wall. During a subsequent mining period, the mine was re-opened to recover sideritic parts of the...a groundmass of albite with muscovite, garnet, apatite, and quartz as accessory minerals. Silica-undersaturated...also contain olivine, clinopyroxene, perovskite, apatite, nepheline and garnet. Metamorphic rock consisting...biotite, calcite, zircon, aegirite, pyrochlore and apatite. Duricrusts containing chiefly calcite. A metamorphic | | | Journal (article/letter/editorial) | | Anothoclase Anthophyllite Antimonselite Antimony native Apatite Apophyllite Aragonite Ardennite Arfvedsonite Argentite...hanging wall. During a subsequent mining period, the mine was re-opened to recover sideritic parts of the...a groundmass of albite with muscovite, garnet, apatite, and quartz as accessory minerals. Silica-undersaturated...also contain olivine, clinopyroxene, perovskite, apatite, nepheline and garnet. Metamorphic rock consisting...biotite, calcite, zircon, aegirite, pyrochlore and apatite. Duricrusts containing chiefly calcite. A metamorphic |
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