| | Journal (article/letter/editorial) | Lattanzi Epithermal precious metal deposits of Italy±an overview Received: 13 October 1998 / Accepted:...view of Italy. It was only in the late 1980s that two districts were recognized, in Sardinia and southern...The most relevant areas include the Au deposit at Furtei, already in production, and the Osilo prospect...extensive exploration is under way. The deposit at Furtei contains at least six tonnes of gold metal. The...similar to porphyrystyle systems also circulated at Furtei. At Osilo, a number of quartz veins containing | | | Journal (article/letter/editorial) | associated with Cenozoic volcanic rocks of Sardinia (Italy): Geological, mineralogical, geochemical features...of Cagliari, Piazza dâArmi 19, 09123 Cagliari, Italy b Dipartimento di Geoingegneria e Tecnologie Ambientali...of Cagliari, Piazza dâArmi 19, 09123 Cagliari, Italy c Dipartimento di Scienze della Terra, University...University of Cagliari, Via Trentino, 09123 Cagliari, Italy Received 28 February 2004; accepted 5 November 2005...deposits associated with the Cenozoic volcanics of Sardinia include kaolin, bentonite, and zeolites. Though | | Ruggieri, Giovanni, Lattanzi, Pierfranco, Luxoro, Silvana S., Dessi, Roberto, Benvenuti, Marco, Tanelli, Giuseppe (1997) Geology, mineralogy, and fluid inclusion data of the Furtei high-sulfidation gold deposit, Sardinia, Italy. Economic Geology, 92 (1) 1-19 doi:10.2113/gsecongeo.92.1.1 | Journal (article/letter/editorial) | Dataof the FurteiHigh-Sulfidation GoldDeposit,Sardinia, Italy GIOVANNI lqUGGIERI, InstitutoInternazionale...Ricerche Geotermiche, CNR,PiazzaSolferino 2, 56100Pisa,Italy PIERFRANCO LATTANZI, Dipartimento di Scienze dellaTerra...09127Caglian', Italy SILVANA S. LUXORO, ROBERTODESSi, Progemisa, Via Contivecchi 7, 09122Cagliari,Italy MARCO...50121Firenze,Italy Abstract Theepithermal high-sulfidation golddeposit at Furtei(Sardinia, Italy)contains...zonesandis characterized by the widespread presence of kaolinite-dickite minerals. Thisalteration pervasively affects | | | Journal (article/letter/editorial) | Systems of Western Sardinia, Italy R. SIMEONE,â Via Corvetto 33, 09014 Carloforte, Italy J. H. DILLES, Department...Tecnologie Ambientali, UniversitĂ di Cagliari, Italy AND M. PALOMBA Istituto di Geologia Ambientale...N.R., Sez. di Cagliari, UniversitĂ di Cagliari, Italy Abstract Large kaolin deposits hosted by Miocene...Miocene silicic pyroclastic rocks in northwestern Sardinia represent hydrothermal alteration formed within...zone of kaolinite 1T-opal ± dickite ± alunite (<20-”m-diam grains) to an outer deeper kaolinite 1M-mon | | Long, Xiao, Hayward, Nick, Begg, Graham, Minlu, Fu, Fangzheng, Wang, Pirajno, Franco (2005) The JinxiâYelmand high-sulfidation epithermal gold deposit, Western Tianshan, Xinjiang Province, P.R. China. Ore Geology Reviews, 26 (1) 17-37 doi:10.1016/j.oregeorev.2004.06.001 | Journal (article/letter/editorial) | epithermal gold deposit, Western Tianshan, Xinjiang Province, P.R. China Xiao Longa,T, Nick Haywardb, Graham...volcano-sedimentary basin in the Xinjiang Uygur Autonomous Province of northwest China. Although all known deposits...has advanced argillic alteration with a dickite+kaolinite+quartz+smectite assemblage. The outer zone (Zone...argillic alteration assemblage of montmorillonite+kaolinite. Gold is hosted mainly by quartz and pyrite in...hydrothermal system in the western Chinese Xinjiang province, enhancing the potential for the exploration of | | Voudouris, Panagiotis Christos, Melfos, Vasilios, Spry, Paul G., Moritz, Robert, Papavassiliou, Constantinos, Falalakis, George (2011) Mineralogy and geochemical environment of formation of the Perama Hill high-sulfidation epithermal Au-Ag-Te-Se deposit, Petrota Graben, NE Greece. Mineralogy and Petrology, 103 (1) 79-100 doi:10.1007/s00710-011-0160-z | Journal (article/letter/editorial) | stĂŒtzite), altaite and electrum. Quartz, barite, kaolinite, sericite and minor aluminum-phosphate-sulfate...and belongs to the Tertiary Rhodope metallogenic province (Fig. 1a). The Perama Hill deposit was found by...Simplified geological map of the Rhodope metallogenic province in Greece showing Tertiary porphyry Cu-(±Mo) and...Oligocene in northeastern Greece to the present in the South Aegean volcanic arc (Jolivet and Brun 2010). The...deposit; f Early pyrite (Py) ore with associated kaolinite (Kln) â aluminium-phosphate-sulfate minerals (APS) | | | Journal (article/letter/editorial) | El Indio, Chile (Jannas et al., 1990) and Furtei, Sardinia (Fiori and Grillo, 2001; Fadda et al., 2005)... rocks of the Oligocene-Miocene Greek Rhodope province (Fig. 1) (Dimou et al., 1994; Voudouris and Arikas...porphyry-epithermal mineralization also occurs further to the south on Limnos Island (northeastern Aegean Sea) (Fig...deposits Ore deposits in northeastern Greece (Rhodope province and Limnos Island) were formed during the final...Perugini et al., 2004). Felsic members in the Rhodope province are considered to be crustal anatectic products | | Liu, Jia-Jun, Yang, Long-Bo, Dai, Hong-Zhang, Yuan, Feng, Zhu, Bing-Yu (2014) Discovery and significance of Cu-Zn intermetallic compounds in the Jingxi gold deposit, western Tianshan Mountains, NW China. Geological Journal, 49 (6) 584-598 doi:10.1002/gj.2583 | Journal (article/letter/editorial) | al., 2002). At the Zhaishang Au deposit (Gansu Province, PRC), a large number of other CuâZn intermetallics...2012). NCTSâ Northern Central Tianshan Suture; SCTSâSouth Central Tianshan Suture. NTIAâNorth Tianshan Island...Tianshan Plate. AMSYâactive continental margin on the south side of the Yili-Central Tianshan Plate. PMâPalaeozoic...deposits can be found in the Tulasu Basin, with the Axi mine being the largest (Fig. 2). Similar but larger and...GEOLOGICAL CHARACTERISTICS OF JINGXI GOLD DEPOSIT 3.1. Mine geology The Jingxi gold deposit is the largest gold | | | Journal (article/letter/editorial) | UniversitaÌ di Cagliari, Via Trentino 51, 09127 Cagliari, Italy *Corresponding author, e-mail: elodiamusu@yahoo... Quantitative chemical analysis of enargite of Furtei. (wt.%) Cu Fe Ag As Sb S Total 1 2 3 4 5...prismatic enargite crystals from the Furtei gold mine (Sardinia, Italy). ReïŹected light microscopy and X-ray...although minor amounts of quartz, pyrite, and kaolinite were observed. Quantitative chemical electron...As/S 0.28 0.26 0.24 0.22 Stoichiometric ratio in Furtei enargite = 0.23 0.20 0 10 20 30 Time (h) 40 | | | Journal (article/letter/editorial) | H2S-bearing steam condensate Opal/chalcedony, alunite, kaolinite, smectite H2S-bearing steam condensate Opal/chalcedony...comprises powdery opaline silica, alunite, and/or kaolinite (Fig. 4b), depending on solution pH. The opaline...White et al. 1956), forms at pH 2â3, whereas kaolinite and more distal smectite characterize rock volumes...alongside the Furtei HS gold deposit, Sardinia, Italy. Note the formerly exploited kaolinite quarries beneath...faults, or fracture zones (e.g., Arcata; Fig. 4c). Kaolinite alteration is commonly observed as root zones | | | Journal (article/letter/editorial) | Andesite, pyroclastics Acidic tuffs ä ä ä ä ä ä ä Kaolinite Sericite Vein Breccia pipe Breccia pipe Vein...The host rocks are hydrothermally altered to kaolinite (Fujii et al., 1989). Watanabe (2005) classiïŹed...of pyrite and sphalerite. The sample from Mutsu mine is a vein rock composed mainly of needle quartz...Uzbekistan Kairagach deposit, Uzbekistan Furtei deposit, Italy 0.00 0.00 0.05 99.87 99.45 98.62 90...consideration (Table 1), the Suzaki ore with kaolinite has Au rich assemblages, whereas the ores in association | | | Journal (article/letter/editorial) | low-sulÂźdation epithermal veins at Osilo (Sardinia), Italy Received: 19 May 1998 / Accepted: 8 March...rolling topography of the Osilo area, northern Sardinia. The Sa Pala de Sa Fae and the Sa Pedra Bianca...University of Cagliari, Piazza D'Armi, 09123 Cagliari, Italy S.F. Simmons Geothermal Institute and Geology Department...92019, Auckland, New Zealand phases in veins. Kaolinite  halloysite  jarosite form a late assemblage...association with calc-alkaline volcanic rocks in Sardinia was reported earlier this century (Deriu 1958) | | | Journal (article/letter/editorial) | Red Mountain, CO6, Underground sample, Longfellow Mine, Red Mountain, Silverton, Colorado). Images: a)...inclusions in Sulfate Stage quartz samples. At Furtei, Sardinia, Ruggieri et al. (1997) also comment on the...Berger / Ore Geology Reviews 39 (2011) 63â74 kaolinite, pyrophyllite, diaspore, andalusite and disseminated...experimentally determined the phase relationships of kaolinite, pyrophyllite, diaspore, andalusite, and corundum...precipitate with alunite or pyrophyllite, or with kaolinite (Fig. 2). In addition silica is added to the wallrock | | | Journal (article/letter/editorial) | from the Coranda-Hondol ore deposit, Certej area, South Apuseni Mountains, Romania. The Coranda-Hondol deposit...structural units: North Apuseni Mountains (NAM) and the South Apuseni Mountains (SAM). Together with the Baia...deposit type and mining history. For this proliïŹc province (GQ), remarkably few studies (Cook et al., 2009a;...(2016) 857â873 859 Fig. 1. Geological map of the South Apuseni Mountains and the location of the major...of hydrothermal alteration: illite, smectite, kaolinite and adularia. Based on KâAr dating of illite and | | Zwahlen, C., Cioldi, S., Wagner, T., Rey, R., Heinrich, C. (2014) The Porphyry Cu-(Mo-Au) Deposit at Altar (Argentina): Tracing Gold Distribution by Vein Mapping and LA-ICP-MS Mineral Analysis. Economic Geology, 109 (5) 1341-1358 doi:10.2113/econgeo.109.5.1341 | Journal (article/letter/editorial) | particularly important for the development of a future mine. This paper describes the main vein types in geologic...extension (Ramos, 1988; Fig. 1). When spreading of the South Atlantic Ocean was initiated in the Late Cretaceous...occurs in several orogen-parallel belts in the South American Andes. These metallogenic belts formed...characterized by an assemblage of native sulfur, kaolinite, or dickite, barite, and alunite, filling open...warrants more rigorous geostatistical analysis prior to mine development and metallurgical plant design. Individual | | | Journal (article/letter/editorial) | the PietratondaâPoggio Peloso (southern Tuscany, Italy) carbonate-hosted Sb-mineralization Andrea Brogi...Siena, Italy Department of Earth Sciences, University of Pisa, Via S. Maria, 53. 56126 Pisa, Italy a r...reserved. doi:10.1016/j.oregeorev.2011.11.003 Province (Peccerillo, 2003; Peccerillo et al., 2001; Serri...continental margins, represented by the CorsicaâSardinia block and the Adria microplate, respectively (Vai...and occurs within centimeter geodes (Fig. 9E); kaolinite, pyrite, sphalerite and Fe-hydroxides are subordinated | | | Journal (article/letter/editorial) | radiogenic age dating (e.g. <0.3 Ma age diïŹerence at Far South EastâLepanto: Arribas et al. 1995b; La Famatina:... Published observations and interpretations Kaoliniteâalunite-type or high-sulphidation epithermal deposits...argillic alteration of adjacent host rocks to quartz+kaolinite/dickite±pyrophyllite±alunite (Summitville, Colorado;...grade in porphyry-style deposits (e.g. the Far South East porphyry associated with the Lepanto epithermal...Summitville, Colorado Chinkuashih, Taiwan Furtei, Sardinia, Italy and many other sites Summitville Kawah | | | Journal (article/letter/editorial) | given by R. of the Victoria and Albert Museum, South Kensington, England. P. D. H. Lead poisoning in...Canada and are being worked a t the âRichardson Mine.â J. W. MELLORreported the feldspar as being of...hand, MELLORâS hypothesis is that a t about 500â kaolinite dissociates into an amorphous mixture of SiO,...VERNADSKY, which implies a gradual change from kaolinite to sillimanite without the formation of free A1403...VERNADSKY suggests that part of the water in kaolinite is âzeolitic water,â and that the formula may | | | Book (volume) | Spain by F. Vazquez Guzman Portugal by D. Thadeu Italy by P. Zuffardi European part of the U.S.S.R. by...Southwest Europe embraces France, Spain, Portugal and Italy. Each volume has an introductory chapter of the...Cordillera Pyreneo-Proven!yal chain Corsica and Sardinia . Mineralization in relation to tectonic evolution...Elisa and Dorinda Barruecopardo Golpejas or Bellita mine Morille-Martinamor El Cubito El Trasqui16n. Santa...Baixo Tejo and Sado Basins Silica sand deposits Italy by P. Zuffardi Introduction Geological setting Stratigraphy | | | Book | Perth, Australia Jim Graham 4th 1991 Pretoria, South Africa Sybrand de Waal 3rd 1989 MontrĂ©al, Canada...Angeles, USA Donald Hausen 1st 1981 Johannesburg, South Africa S.A. Hiemstra INTERNATIONAL COUNCIL FOR...years since the inaugural meeting in Johannesburg, South Africa in 1981 and this decenary event perhaps heralds...Prof.Dr. Juraj Majzlan Germany Dr. Mario Berra Italy Prof.Dr. Terje Malvik Norway Dr. Arjan Ciftja...aggregates in mortars: examples from Lombardy (Northern Italy) Bugini, R, and Folli, L 85 13 Assessment of | | | Book | Guastoni; Roberto Appiani. Originally published: Italy : Mondadori, 2003. [256] p. : col. photos. ; cm...CAPTIONS Page 1: Cuprite crystals from the Ray mine, Arizona Pages 2-3: Liroconite from PERFECT CLEAVAGE...Susa Valley, Piedmont, Italy Pages 8-9: Beryl from the Codera Valley, Lombardy, Italy Pages 42-43: Silver...Mount Bregaceto, Liguria, Italy Pages 104-105: Azurite crystals from Sardinia, Italy Pages 118-119: Boracite...160-161: Elbaite crystals from the island of Elba, Italy Pages 244-245: Whewellite crystals from the Czech | | Sahlström, Fredrik, Chang, Zhaoshan, Arribas, Antonio, Dirks, Paul, Johnson, Craig A., Huizenga, Jan Marten, Corral, Isaac (2020) Reconstruction of an Early Permian, Sublacustrine Magmatic-Hydrothermal System: Mount Carlton Epithermal Au-Ag-Cu Deposit, Northeastern Australia. Economic Geology, 115 (1) 129-152 doi:10.5382/econgeo.4696 | Journal (article/letter/editorial) | Johannesburg, Auckland Park, Johannesburg 2006, South Africa 8Departament de Geologia, Universitat AutĂČnoma...formed a silicic â quartz-alunite â quartz-dickite-kaolinite zoned alteration halo with increasing distance...The New England orogen extends from eastern New South Wales to northeastern Queensland along the eastern...faulting in response to both east-west and north-south extension, partly Fig. 3B (A) SW NE m.a.s.l...breccia, hem = hematite, ill = illite, kln = kaolinite, mnt = montmorillonite, prl = pyrophyllite, py | | | Book | Guastoni; Roberto Appiani. Originally published: Italy: Mondadori, 2003. (256} p. : col. phptos. ; cm....mineral; it is expressed on a scale from 1 to 10. Ray mine, Arizona Pages 2-3: Liroconite from Cornwall, England...Valley, Piedmont, Italy Pages 8- 9: 13eryl from the Codera Valley, Lombardy, Italy Pages 42- 43: Silver...Mount Bregaceto, Liguria, Italy Pages 104-105: Azurite crystals from Sardinia, Italy Pages 118-119: Boracite...160-161: Elbaite crystals from the island of Elba, Italy Pages 244-245: Whewellite crystals from the Czech | | Scher, S., Williams-Jones, A. E., Williams-Jones, G. (2013) Fumarolic Activity, Acid-Sulfate Alteration, and High Sulfidation Epithermal Precious Metal Mineralization in the Crater of Kawah Ijen Volcano, Java, Indonesia. Economic Geology, 108 (5) 1099-1118 doi:10.2113/econgeo.108.5.1099 | Journal (article/letter/editorial) | residual silica, alunite-pyrite, and dickite/ kaolinite. Based on the fractionation of 34S and 32S between...fluid/rock ratio), or by converting them to dickite/kaolinite (lower fluid/rock ratio). Gold-, silver-, and...wall) and volcanic peaks in the north, east, and south (Gunungs Ringgih, Merapi, Ranteh, 110° E 100°E...summit-disrupting explosion and a flow of lava to the south (Sitorus, 1990; Berlo, 2001), and has continued...alunite group of minerals), cristobalite, quartz, kaolinite, dickite, diaspore, gypsum, and pyrite. Although | | | Report (issue) | Tanganyjka Territory Uganda ... . .. Union of South Africa Canada . .. . .. British Guiar1a ... C,eylon...Denmark . .. Finland ,. . . France . .. Germany . .. Italy . . . . .. Ju goslavia .. . .. . ... ... ... ....micro-crystalline powder, approximating in Câąo mposition to kaolinite (Al 2 0 3 âą 2Si02 âą 2H20), whereas ordinary rock...analyses approximate closely to that of the mineral kaolinite,e.a and th.e re can be little or no doubt, especially...chemical composition of chinaclay as compared with kaolinite are due generally to the Pl"esence in the china-clay |
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Furtei mine, Furtei, South Sardinia Province, Sardinia, Italy