 | | Journal (article/letter/editorial) | | Distribution of gold in some magmatic rocks from Central Italy A. Bencini 1, C. Ciurli 1, G. Tanelli 2 and C. Verrucchi...Department of Earth Sciences, Naples University, Italy Received: December 1989/Accepted: August 3, 1990...activity during the Miocene and Quaternary in Central Italy produced intrusive and effusive sub-alkaline and...determine the gold content of some magmatites from the Tuscany-Latium district, using an Hg-Sn extraction technique...Apenninic Event, the Tyrrhenian margin of Central Italy was subject to the upwelling of crustal and subcrustal |  | | Journal (article/letter/editorial) | | Lattanzi Epithermal precious metal deposits of Italy±an overview Received: 13 October 1998 / Accepted:...recently been added to the metallogenic view of Italy. It was only in the late 1980s that two districts...districts were recognized, in Sardinia and southern Tuscany, previously long known for a large variety of other...less than 4% wt. NaCl equivalent. In southern Tuscany, a number of carbonate-hosted (``Carlin type'')...occur at the edges of the geothermal ®elds of Larderello, Amiata and Latera, an area previously known |  | | Journal (article/letter/editorial) | | Scienze della Terra, University of Pisa, Via S. Maria 53, 56126 Pisa, Italy; paolo.fulignati@unipi.it Received:...group ±smectites ±alunite Intermediate argillic 4.5–6 <200 ◦ C Pyrophyllite alunite High-T advanced...(Greece), Chipilapa (El Salvador), Pantelleria (Italy), Tendaho (Ethiopia), and Berlin (El Salvador)....ranging from about 4.5 to 6 [40,41]. Studies on alunite-supergroup (aluminum-phosphates-sulphates, APS)...(e.g., Salton Sea, USA, and Pantelleria Island, Italy [5,13]). These occur as an alteration product of |  | | Journal (article/letter/editorial) | | rhyolitic minerals: the kaolin deposit of Torniella (Italy) Cecilia Viti, Matteo Lupieri, and Massimiliano...tables Abstract: The Torniella mine (Southern Tuscany, Italy) represents one of the most important Italian...pseudocubic crystals of alunite are commonly associated to feldspar weathering; alunite occurrence and whole-rock...hydrothermal weathering, rhyolite, kaolinite, halloysite, alunite, ceramic material. Introduction Primary rock-forming...kaolin deposits in Italy occurs close to the Torniella village (Roccastrada, Southern Tuscany), formed by hydrothermal |  | | Journal (article/letter/editorial) | | WASSERMAN: Experimental and textural studies of alunite: controls on the organic 1. ‘sO-‘6O and D-H...M. PUXEDD~J: Evidence rock interaction in the Larderello geothermal system. D. M. DER. CHANNER and E....carbon organic rings. studies of alunite: Il. Rates of alunite-water D. K. MCDANIEL, S. R. HEMMING...Formation, Sudbury S-type rhyolite, San Vincenzo, Tuscany, Italy. D. P. MOECHER, J. W. VALLEY, and E. J. ESSENE:Extraction... R. 0. RYE, and M. D. WASSERMAN: Experimental alunite and water at 250-450°C. evolution An investigation |  | | Journal (article/letter/editorial) | | WASSERMAN:Experimental studies of alunite: I. ~80-~60 and D-H fractionation factors between alunite and water at 250-n450°C... WASSERMAN:Experimental studies of alunite: II. Rates of alunite-water alkali and isotope exchange. R...history of an Stype rhyolite, San Vincenzo, Tuscany, Italy. D. P. MOECHER,J. W. VALLEY,and E. J. ESSENE:...and early magmatic fluidrock interaction in the Larderello geothermal system. D. M. DER CHANNER and E. T |  | | Journal (article/letter/editorial) | | 1International Institute for Geothermal Research, Pisa, Italy 2 Beppu Geophysical Research Laboratory, Beppu...(sulphur, pyrite, opal, kaolinite, halloysite, alunite, halotrichite, alunogen, melanterite); 7 Nabeyama...leaching and the presence of cristobalite, sulphur, alunite, kaolinite, jarosite, diaspore and a Fe-Mg-chlorite...(1985) Distribution of hydrothermal minerals in Larderello-Travale and Mt. Amiata geothermal fields. Transaction...Puxeddu M (1980) Hydrothermal metamorphism in the Larderello geothermal field. Geothermics 9:297-314 Coombs |  | | Journal (article/letter/editorial) | | RENNE:40Ar/3YAranalysis of supergene Jarosite and alunite: Implications to the paleoweathering history of...WASSERMAN: Experimental alunite and water at 250-450°C. studies of alunite: R. E. STOFFREGEN, R. 0... and D-H fractionation studies of alunite: 11. Rates of alunite-water and release behaviour of a double...and chemical S-type rhyolite, San Vincenzo, Tuscany, Italy. D. P. MOECHER, J. W. VALLEY, and E. J. ESSENE:...M. PUXEDDU: Evidence rock interaction in the Larderello geothermal system. D. M. DER. CHANNER and E. |  | | Journal (article/letter/editorial) | | Osservatorio Vesuviano, via Manzoni 249, 80122 Napoli, Italy Dipartimento di Scienze della Terra, Università...Università di Genova, Corso Europa 26, 16132 Genova, Italy 2 (Received November 26, 1997; accepted in revised...Flegrei, Vesuvio, Ischia, Pantelleria, and Lipari (Italy), Nisyros (Greece), Teide (Canarias Island, Spain)...geothermal fields are considered: Larderello, Travale, Amiata, Bagnore, Mofete (Italy), Kizildere (Turkey), Nisyros...(1992) (2) Data from DST (Perugia, Italy) and IGGI-CNR (Pisa, Italy) (3) Chiodini et al. (1991a) (4) Tedesco |  | | Journal (article/letter/editorial) | | and this grades laterally and vertically through alunite- to clay-rich zones. Fluid inclusions from the... "~ 200 ~5o ;oo 7-11_] 3'so Quartz Zone Alunite Zone I , ,~o ,'so 400 ' 450 ' I~1 Atunite...Ugusu mine, Hakko No. I ore body 500 m a.s.l., alunite--quartz veinlet in clay zone Ugusu mine, Shibayama...with alunite and quartz ibid. Ugnsu mine, Shibayama No. 3 ore body, silicified rock with alunite and quartz..., brownish silicified porous rock composed of alunite and quartz ibid. ibid. Ugusu mine, Shibayama No |  | | Journal (article/letter/editorial) | | RENNE" 4°Ar/39Ar analysis ofsupergene jarosite and alunite: Implications to the paleoweathering history of...Experimental studies of alunite: I. 180-160 and D-H fractionation factors between alunite and water at 250-450°C...history of an S-type rhyolite, San Vincenzo, Tuscany, Italy. D. P. MOECHER,J. W. VALLEY,and E. J. ESSENE:...and early magmatic fluidrock interaction in the Larderello geothermal system. D. M. DER. CHANNER and E. |  | | Journal (article/letter/editorial) | | X-ray diffraction data for dolerophanite, Vesuvius, Italy 26. X-ray diffraction data for sideronatrite, Chile...two discs with water drawn between by Vesuvius, Italy capillary attraction (Fig. 3b). The presence of...absorption bands caused by water identified in Larderello, Tuscany, Italy this way may then be identified in a...this method may be illustrated by refVesuvius, Italy erence to the five absorption spectra for gyp- ...X-ray powder data for aphthitalite from Vesuvius, Italy, show a small amount of associated jarosite (A.S |  | (1994) Volume 58, 1994 List of Associate Editors and Reviewers, List of Contents, Subject Index, Author Index, Book Reviews Published, Books Received, Subject Areas of Manuscripts Published in 1994ished, Books Received,. Geochimica et Cosmochimica Acta, 58. doi:10.1016/0016-7037(94)90592-4 | Journal (article/letter/editorial) | | WASSERMAN:Experimental factors between alunite and water at 250-450°C 903 studies of alunite: I. ‘*O-‘6O and D-H fractionation... WASSERMAN:Experimental studies of alunite: II. Rates of alunite-water alkali and isotope exchange ....history of an S-type rhyolite, San Vincenzo, Tuscany, Italy 943 Constraints on the D. P. MOECHER,J....SHIREY,and F. G. LE Roux: Kalkkop Crater, Cape Province, South Africa: Confirmation of impact origin using...early magmatic fluid-rock interaction in the Larderello geothermal system . . ... . . . . 1083 D. M |  | | Journal (article/letter/editorial) | | of Western Sardinia, Italy R. SIMEONE,† Via Corvetto 33, 09014 Carloforte, Italy J. H. DILLES, Department...Tecnologie Ambientali, Università di Cagliari, Italy AND M. PALOMBA Istituto di Geologia Ambientale...N.R., Sez. di Cagliari, Università di Cagliari, Italy Abstract Large kaolin deposits hosted by Miocene...shallow zone of kaolinite 1T-opal ± dickite ± alunite (<20-µm-diam grains) to an outer deeper kaolinite...silica is enclosed within a zone of kaolinite 1T-alunite (<50-µm-diam grains)-quartz-opal ± dickite ± cristobalite |  | | Journal (article/letter/editorial) | | In Italy diiring the course of power development at Larderello and adjacent regions in Tuscany (ippolito...5 pounds per square inch in a representative Larderello well drilled to a depth of 876 feet. Brannock...changes were noticeable aft?r 4 weeks at 200°C. Alunite is another mineral frequently associated with clay...clay. Leonard (1927) formed 60 to 90 percent alunite in 7 days in sealed pyrex tubes with O.IM solutions...with ammonium sulphate at a temperature of 200°C. Alunite (50 to 99 percent) was formed at 100°C in 0.05M |  | | Journal (article/letter/editorial) | | sites, as would advanced argillic alteration if alunite were present. Hydrothermal alteration which had... New Zealand Orakeikorako, New Zealand Agnano, Italy (Acid) sulfate (chloride) waters Ebeko Volcano...New Zealand Waiotapu, hot pool, New Zealand Larderello, Italy Copahue Volcano, Argentina Tahuangtsui, Tatun...Wairakei, New Zealand Wairakei, New Zealand Larderello-Travale, Italy Kizildere, Turkey Carlsbad, Czechoslovakia...suitable ammonium host minerals such as jarosite and alunite, which have been reported from Alligator Ridge |  | Muffler, L.J., Nehring, N.L., Truesdell, A.H., Janik, C.J., Clynne, M.A., Thompson, J.M. (1982) The Lassen geothermal system. Open-File Report Vol. 1982 (82-926) US Geological Survey doi:10.3133/ofr82926 | Report (issue) | | altered to a white aggregate of opal and kaolinite alunite; the surface of the active part of Bumpass Hell...White, 1973) has been produced from wells at Larderello, Italy, by the isothermal decompression of saturated...of only 500-600 m, comparable to parts of Larderello, Italy, but much thinner than the two-phase reservoir...(ed.), Nuclear Geology on Geothermal Areas: Pisa, Italy, Consiglio Nazionale delle Ricerche, Laboratorio |  | | Journal (article/letter/editorial) | | RENNE:4”Ar/J”Ar analysis of supergene jarosite and alunite: Implications to the paleoweathering history of...Experimental studies of alunite: I. 180-‘60 and D-H fractionation factors between alunite and water at 250-450°C...WASSERMAN: Experimental studies of alunite: II. Rates of alunite-water alkali and isotope exchange 917...history of an Stype rhyolite, San Vincenzo. Tuscany, Italy 943 D. P. MOECHER,J. W. VALLEY,and E. J....SHIREY, and F. G. LEROUX:Kalkkop Crater, Cape Province, South Africa: Confirmation of impact origin using |  | | Journal (article/letter/editorial) | | llite-mont. Illite Biotite Chlorite Celadonite Alunite Anhydrite x - x x x...Tomasson 1976a, b, c, Kristmannsdottir 1976. Larderello: Marinelli 1969. Note: d = detrital, r = relict...and adularia, whereas deep low pH fluids produce alunite (Hayashi 1973) in accord with the experimentally...epidote, adularia, quartz, calcite, and zeolites at Larderello (Marinelli 1969) indicates that a liquid was...evident at the surface. Sulfates (particularly alunite) and kaolin are common, and pyrophyllite and zeolites |  | | Journal (article/letter/editorial) | | alteration assemblages, comprising kaolinite, dickite, alunite, cristobalite, native sulphur, pyrite and hematite...Krafla, Iceland (Kristmannsdottir 1981); Larderello, Italy and geothermal systems of Kamchatka (Bird...Bird et al. (1984) considered that garnet at Larderello, Italy, was in equilibrium with clinopyroxene and |  | | Journal (article/letter/editorial) | | \ Zone of kaolinite V/ 16 l/ Zone Zone of alunite E 147E 1N / / PACIFIC 7 / O~INUAA sG~/ /...the extended curve Zone of kaolinite, 4: Zone of alunite, 5: Zone of in Fig. 2. The positive correlation...occurrence of montmoril lonite, kaolinite and alunite as shown in Fig. 1. The zonal distribution on the...surface is observed in the vertical section; the alunite, zone occurs in center, successively surrounded...isotopic composition of the. geothermal fluids in Larderello field. Geochermics 5, 153-163. D'AMORE,F. and |  | | Journal (article/letter/editorial) | | Wollastonite has been reported from the Larderello geothermal field, Italy, where it occurs at depths between...lesser quartz, pyrite, sphalerite, calcite, illite, alunite and hematite. These minerals are most abundant...wells except 408, 501, 503, 509, 510, and 513), alunite (in wells 503 and 511), anhydrite and pyrite (all...temperature variety, dickite (Wood, 1977). 4.4. Alunite Alunite was detected in wells 402 (–104 m), 503 (–593...Hematite occurs with alunite in well 402; and with pyrophyllite, diaspore, and alunite in well 503. 4.6. |  | | Book (volume) | | schlossmacherite are considered as H3Odominant members of the alunite-jarosite group with idealized formulae (H3O)Fe3(SO4)2(OH)6...“hydroniumalunite”, as well as (Na,K)-deficient alunite-jarosite group minerals, characteristic bands of...Ca2B4O4(OH)7Cl·7H2O Locality: Salar de Carcote deposit, El Loa province, Antofagasta, Chile. Description: Colourless crystal...borax deposit, Salar del Hombre Muerto, Salta province, Argentina (type locality). Description: Colourless...District, Vakinankaratra Region, Antananarivo Province, Madagascar. Description: Grey grains from the |  | | Book (edition) | | Republic). W.D. Birch (Australia), Elena Bonaccorsi (Italy), Ernst A.J. Burke (Netherlands), L.J. Cabri (Canada)...M. Dcliens (Belgium). Giancarlo Delia Ventura (Italy), T.S. Ercit (Canada). Alexander Falster (USA)....(Canada). L.A. Groat (Canada). Alessandro Guastoni (Italy), William A. Henderson. Jr. (USA). D.D. Hogarth...(ltaly). Igor Pekov (Russia), atale Perchiazzi (Italy). Ole V. Petersen (Denmark). Fedcrico Pezzotta (ltaly)...Apuan 2(Si2O7)(SiO,)O(OH), Alps,Stazzema,Lucca,Tuscany,ltaly,SI, 152-158,EJM 18,551-567, CM 44, 523-531 |  | | Report (issue) | | cany, Italy Silicate from 1933. Ammonioborite, a New 18:480-492. NMNH R6167 Larderello, Tus¬...NMNH 113220 Ajo, Arizona Mineralogist, 93756 Larderello, Tus¬ See reference above. New Hydrous Aluminum...Aluminum Copper Silicate from American NMNH cany, Italy W. T. Schaller and A. C. Vlisidis, 1958. Ajoite...reference above. Magazine, 20:277-286. Petruk, Larderello, (A. Pelloux, 1921) Mine, Kimberley, South...Wright, 1925. Afwillite, a New (U.S. NMNH cany, Italy (Roebling Collection, from J. W. Mallet, 1927) |
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