 | | Journal (article/letter/editorial) | | rhyolitic minerals: the kaolin deposit of Torniella (Italy) Cecilia Viti, Matteo Lupieri, and Massimiliano...Abstract: The Torniella mine (Southern Tuscany, Italy) represents one of the most important Italian deposits...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...1993). One of the most important kaolin deposits in Italy occurs close to the Torniella village (Roccastrada |  | | Report (issue) | | the area west of White Mountain, Shauntie Hills province . . . . . . . . . . . . . . 18 Alteration of the... . . . . . . . . 22 Table Table Table Table Alunite occurrences . . . . . . . . . . . . . . . . . ... . . . . . . . . . . . . . 12 Geochemistry of alunite deposits . . . . . . . . . . . . . . . . . . ....information and advances in the understanding of alunite formation these occurrences have been characterized...argillic mineral assemblage, typically contains alunite + kaolinite + quartz ± pyrite ± sulfur. In some |  | | Journal (article/letter/editorial) | | com/locate/oregeorev bGeochemistry and origin of the Şaphane alunite deposit, western Anatolia, TurkeyQ [Ore Geology...al. (2005) presented new data on the Şaphane alunite deposit in western Anatolia, Turkey. The present...comparison with the ŞaplVca deposit, a larger alunite deposit in Turkey, as well as pointing out a number...al. Mutlu et al. (2005) claim that another alunite occurrence is found at ŞaplVca, at Şebinkarahisar-Giresun...work of Özgenç (1993). However, the ŞaplVca alunite occurrences have been known for about 500 years |  | Taghipour, Batoul, Mackizadeh, Mohammad Ali, Pourmoghani, Mehdi, Kasson, Arthur, Taghipour, Sedighe (2008) Geology and mineralogy of advanced argillic alteration in the Keshe area (Mt. Karkas), Central Iran. Central European Geology, 51 (1) 85-98 doi:10.1556/ceugeol.51.2008.1.5 | Journal (article/letter/editorial) | | altered rocks are characterized by an assemblage of alunite, kaolinite and quartz, which is typical in advanced...environment. Key words: hydrothermal alteration, alunite, kaolinite, Cenozoic magmatic belt, Central Iran...X-ray diffractometery was used to identify the alunite-group and kaolinitegroup minerals for 20 samples...and chemical data 20 EDS analyses were made on 3 alunite-bearing samples and 2 kaolinite samples from the...observations revealed that two small kaolinite-alunite deposits are located within the area of hydrothermally-altered |  | Li, Xuanxuan, Zhou, Taofa, White, Noel C., Fan, Yu, Zhang, Lejun, Xie, Jie, Liu, Yinan, Xiao, Xin (2020) Formation of the Fanshan lithocap and implications for exploration in the Luzong Basin, Anhui Province, China. Ore Geology Reviews, 118. 103314 doi:10.1016/j.oregeorev.2020.103314 | Journal (article/letter/editorial) | | Implications for Exploration in the Luzong Basin, Anhui Province, China Xuanxuan Li, Taofa Zhou, Noel C White,...Implications for Exploration in the Luzong Basin, Anhui Province, China, Ore Geology Reviews (2020), doi: https://doi...Implications for Exploration in the Luzong Basin, Anhui Province, China Xuanxuan Li1,2, Taofa Zhou1,2 *, Noel C...Technology, Hefei 230009, Anhui, China 2 Anhui Province Engineering Research Center for Mineral Resources...Dafanshan alunite mining district with vuggy quartz–alunite–pyrite, quartz–dickite–kaolinite -/+ alunite, quartz–kaolinite |  | | Report (issue) | | geochemistry of acid-sulfate alteration and vein forming alunite by Robert O. Rye 1 Philip M. Bethke2 Michael D...wall-rock alteration, characterized by the assemblage alunite+kaolinite+ quartz±pyrite, results from base-leaching...andesitic volcanic terrains. In addition, coarse vein alunite may form in a magmatic-steam environment from rapid...oxygen in the carapace of a volcanic edifice. Alunite [KAh(SO4)2(OH)fil contains four stable isotope...measurements have been made on nearly 200 samples of alunite and associated minerals from 20 localities and |  | Deyell, C.L., Rye, R.O., Landis, G.P., Bissig, T. (2005) Alunite and the role of magmatic fluids in the Tambo high-sulfidation deposit, El Indio–Pascua belt, Chile. Chemical Geology, 215 (1) 185-218 doi:10.1016/j.chemgeo.2004.06.038 | Journal (article/letter/editorial) | | (2005) 185 – 218 www.elsevier.com/locate/chemgeo Alunite and the role of magmatic fluids in the Tambo high-sulfidation...barite and alunite within hydrothermal breccias and veins. Isotopic compositions of fluid in alunite show a...component throughout the entire hydrothermal process. Alunite 40 Ar/39Ar ages constrain the timing of alteration...contemporaneous with the volcanism of the Tambo Formation. Alunite from this stage of alteration occurs in the matrix...of barren breccias and as fine intergrowths of alunite–quartzFclays that selectively replaced feldspars |  | Deyell, C. L., Leonardson, R., Rye, R. O., Thompson, J. F. H., Bissig, T., Cooke, D. R. (2005) Alunite in the Pascua-Lama High-Sulfidation Deposit: Constraints on Alteration and Ore Deposition Using Stable Isotope Geochemistry. Economic Geology, 100 (1) 131-148 doi:10.2113/100.1.0131 | Journal (article/letter/editorial) | | Geologists, Inc. Economic Geology, v. 100, pp. 131–148 Alunite in the Pascua-Lama High-Sulfidation Deposit: Constraints...mineralization are recognized, including all types of alunite-bearing advanced argillic assemblages (magmatic-hydrothermal...steam-heated, magmatic steam, and supergene). The occurrence of alunite throughout the paragenesis of this epithermal...nature of alteration and mineralization of the alunite-pyrite-enargite assemblage in the deposit. Early...widespread propylitic zones. Alunite of this stage occurs as fine intergrowths of alunite-quartz ± kaolinite, |  | | Journal (article/letter/editorial) | | Te, fluorite, U) and hydrothermal replacements (alunite). The value of several deposits exceeds 10 billion...U) et des gkes de substitution hydrothermaux (alunite). La valeur de certains de ces gisements d4passe...IleOnnT), opy~eHeHH~Ie x e p : a (Au, U, anaTnT), x~di~H~re MecTopox)/enn~ (Au, Ag, Te, qbnyopI4X, U) n...documented in the mid-Tertiary Basin and Range province of the United States. The concept presented was...Graben. ELSTON (1984) defines the Basin and Range province (western Mexico and southwestern USA) as the site |  | McArthur, J.M., Turner, J.V., Lyons, W.B., Osborn, A.O., Thirlwall, M.F. (1991) Hydrochemistry on the yilgarn block, western Australia: Ferrolysis and mineralisation in acidic brines. Geochimica et Cosmochimica Acta, 55 (5) 1273-1288 doi:10.1016/0016-7037(91)90306-p | Journal (article/letter/editorial) | | containing high concentrations of K and SO,, causes alunite to precipitate as pH rises from a minimum of 2...1 to 2 M, to >6 at chlorinities of 4.8 M. The alunite deposits formed by this process are many orders...Minnippa-Kyancutta, South Australia, contain more than 50% alunite + jarosite to depths of 2.3 m, and cover areas...(LOCK 1988; BIRD et al., 1989). The formation of alunite and jarosite requires acidic conditions so that...(SAAVEDRAand SANCHEZCAMAZANO, 198 1) diagenetic alunite is spatially associated with silcrete and iaterite |  | | Journal (article/letter/editorial) | | porphyry-type deposits, (4) magmatic-hydrothermal alunite and closely related barites in high-sulfidation...deposits, (5) coarse-banded alunite in magmatic-steam systems, (6) alunite and jarosite in steam-heated...waters. Hydrogen isotopic equilibrium between alunite and water and jarosite and water is always initially...interpretation of yD values of magmatichydrothermal alunite in high-sulfidation gold deposits because later...hydrogen– isotope exchange in the OH site of the alunite. This retrograde exchange also affects the reliability |  | | Journal (article/letter/editorial) | | kaolinite, plus late dickite veins, as well as K alunite, Al phosphate-sulfate minerals, zunyite, diaspore...8–20.1‰, δD = –73 to –43‰, δ34S = 9.8–17.9‰), the alunite formed from condensation of magmatic vapor that...in the region. A leached outcrop with supergene alunite and Cu oxide minerals occurs as a prominent hill...ash-flow tuff, with strong quartz-alunite alteration; the arrow indicates alunite isotope sample (OTD385-165)...supported by the occurrence of abundant hydrothermal magnetite at all deposits and the occurrence of hydrothermal |  | Li, Su-Ning, Ni, Pei, Bao, Tan, Wang, Guo-Guang, Chi, Zhe, Li, Wen-Sheng, Zhu, Ren-Zhi, Dai, Bao-Zhang, Xiang, Hong-Liang (2020) Geological, fluid inclusion, and H–O–S–Pb isotopic studies of the Xiaban epithermal gold deposit, Fujian Province, southeast China: Implications for ore genesis and mineral exploration. Ore Geology Reviews, 117. 103280 doi:10.1016/j.oregeorev.2019.103280 | Journal (article/letter/editorial) | | of the Xiaban epithermal gold deposit, Fujian Province, southeast China: implications for ore genesis...of the Xiaban epithermal gold deposit, Fujian Province, southeast China: implications for ore genesis...of the Xiaban epithermal gold deposit, Fujian Province, southeast China: implications for ore genesis...the Dehua goldfield of central-eastern Fujian Province, 15 southeast China. Detailed field observations...the former being associated with a quartz ± 56 alunite ± pyrophyllite ± dickite ± kaolinite alteration |  | | Report (volume) | | Opal _________________________-i__________ 361 Alunite __________________-_________ T _-___ 361 Water...is to furnish a general idea of the character, occurrence, distribution, and development of the mineral...Tucson,1 in which the botanists refer to the great province in which this area lies as the Nevada-Sonoran...geological features of Mexico and the Sonoran province: Idem, pp. 163-178. Weed, W. H., The Cananea copper...1910. Blake, W. P., Minerals of Arizona; their occurrence and association, with notes on their composition: |  | | Book | | photographs: 10 providing some unpubli hed data at our di posal: making critical review of the text; and in...Galli. Giovanna Vezzalini (University of Modena. Italy). Prof. Mykola Shcherbak (lnsti1u1e of Mineralogy...polymetamorphic evolution and similar, but less significant occurrence in the Arie§ Valley of the Apuseni Mts. at Salciua...ore lenses, partially of a gondi te type. form a di cont inuou belt. some I00 km long. in the central...te d mine ralizations we re recently recognised in di fferent parts of the South Carpathian [Uduba~a. 1987] | | | Book | | Galli. (iiovanna Vezzalini (University of Modena. Italy). Prof. Mykola Shcherbak (Institute of Mineralogy...Sebeş-Lotru Group), the only sig nificant type of occurrence is the graphite deposit at Polovragi in the Parâng...major tv pes of mineral deposits or min eral occurrence arc verv adequately' represented in the Carpathians...penetrate them, especially at the Ciucaru Mare occurrence. Ac cessory millerite and secondary magnetite...Cu. Co. Fe or Pb and Zn. The Măgureaua Vaţei occurrence does not obey this rule. First, the skarn assemblages |  | | Book | | such as quartz and feldspar, are widespread in occurrence. Others, such as platinum and diamond, are limited...is an important aid to understanding mineral occurrence. Examples of such groupings are copper, lead...(e) Planes 8 and 9 (afteF Klug and Alexander, X-ray Di/fraction Procedures, John Wiley and Sons, New York...FORM Ditetragonal bi pyramidal .!. _g_ _g_ 16 Di tetragonal pyramidal 4 mm 8 A4 14P diaboleite...bipyramid Di tetragonal prism Ditetragonal pyramid 4 mm 4 m 4 2 2 4 2 m 4 4 Tetragonal Di tetragonal |  | | Report (volume) | | the copper minerals.......................... Occurrence of the copper minerals.........................the silver minerals.......................... Occurrence of the silver minerals.........................compounds...................................... 135 Occurrence of the lead minerals...........................compounds...................................... 140 Occurrence of the zinc minerals...........................iron minerals............................. 143 Occurrence of the iron minerals........................ |  | | Report (volume) | | sulphide zones._ _ ______________________ 172 Occurrence of the copper minerals_________________ 176 Copper-bearing...Silver-lead deposits 268 Silver-copper deposits 269 Occurrence of silver minerals_________;__________ 270 Silver-bearing...356 Nature and relations of lead minerals 357 Occurrence of lead minerals 359 Lead-bearing'deposits__________...pyrite-galena-sphalerite ore bodies in limestone 374 Occurrence of zinc minerals - 377 Zinc-bearing deposits...Principal antimony minerals_____________________ Occurrence and relations of antimony minerals-___-____- |  | | Book (edition) | | Tectosilicates 397 405 423 446 356 Contents 6. OCCURRENCE AND ASSOCIATION OF MINERALS Rocks and Rock-forming...in a garden has seen minerals in their natural occurrence. The rocks of the mountain, the sand on the beach...to 2 Introduction I materials of natural occurrence. Thus, cement, plaster, and glass are not steel...as the only form on a few minerals. The other Occurrence of Isometric Forms of the Hexoctahedral Class...plane of symmetry (Fig. 105b). Figure 106 shows a di- hexagonal dipyramid and its stereogram. Hexagonal |  | | Report (issue) | | Beaverite Gypsum Epsomite Goslarite Chalcanthite Alunite Jarosite 4 Plumbojarosite Page. 98 98 98 98 98...Milford Valley. Lindgren '° has described the occurrence of anhydrite in the Cactus mine and in connection...thunderstorms or cloudbursts are of frequent occurrence. The water that falls during these storms quickly...summing up in the following words: "The basin province is characterized by northsouth ranges that are...consolidated beds younger than the Triassic exposed in the di-A rid are the conglomerate beds in Copper Gulch. |  | | Book | | ANG-ONG Via XX Setembre, 75 Tredozio SO-zip 47019 - ITALY xix Bongar~on, Dominique F., INCO EXPLORATION...Roberto, UNIVERSITA DEGLI STUDI DI ROMA "LA SAPIENZA" Dipartimento di Ingegneria Chi mica, dei Materiali...Prime Metal\. Via Eudossiana, 18 - 00184 ROMA, ITALY Buxton, Bruce, BATTELLE 505 King Avenue Columbus...Via G.Fortunato Campus Universitario 70125 Bari, ITALY Quental, LUIS Ramos, PARTEX Avenida 5 de Outubro...PORTUGAL Raspa, Giuseppe, UNIVERSITA dI ROMA "LA SAPIENZA" Dipartimento di Engegneria Chimica de Materiali |  | | Report (issue) | | . . . . . . . . . . . . . . . . . . . . . . Occurrence and distribution .......................................................................... Occurrence, distribution, and age..................................................................... Occurrence and distribution...................................................................... . 53 Occurrence and distribution ..................................................................... . 56 Occurrence and distribution ........................... |  | | Report (issue) | | 231 and relation to structural features_ _ 179 Occurrence 1 231 Relation of veins to erosion 1 180 Megascopic...bodies to character of Distribution and mode of occurrence 1 238 wall rock 1 186 Geographic distribution...by far the more abundant. Two small stocks the occurrence of the pipes in depressions of the bedrock surface...sulphide zones. Gold presents one striking mode of occurrence in the sulphides as veinlets, coatings, and interstitial...different parts of Europe, spent the winter in Italy, and returned to Boston in June, 1866. Early in |  | | Report (volume) | | Lincei, Rendiconti, Classe di Scienze Fisiche, M atematiche, e N aturali. Rome, Italy. Acta Cryst. - Acta Crystallographica...Colin. Paris, France. Annali Geofisica Rome, Italy. Annali di Geofisica. The Bulletin de Ia Societe de...de Geographic. Revista dell'Istituto N azionale di Geofisica. Antarktika Doklady Kom. - Antarktika Doklady...Tipografico Francesco Giannini and Figli. Naples, Italy. Bulls. Am. Paleontology - Bulletins of American...Rend. e Lettere Rendiconti. Milan, Italy. Istituto Lombardo Accademia di Scienze Japan Acad. Proc.- Proceedings |
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Alunite occurrence, Mezzano, Valentano, Viterbo Province, Lazio, Italy