Abstract
Borosilicate alteration is developed in many uranium-molybdenum-zinc deposits in volcanic piles such as at Novazza (Italy), Novoveska Huta (Slovakia), Ben Lomond (Queensland, Australia), the Saar-Nahe basin (Germany), the Shengyuan district (China), and at many deposits in Russia. These uranium-molybdenum-zinc deposits share similar styles of alteration with silver-gold-zinc deposits in volcanic rocks, like those of the Humboldt Range (Nevada, USA), the Basin district (Montana, USA) and Equity Mine (British Columbia, Canada). In thick volcanic piles, fluid-rock interaction commonly develops under the influence of convective hydrothermal systems. In borosilicate-bearing systems the alteration is characterized by changes in borosilicate mineralogy and chemistry under mesothermal conditions. Zonal distribution of different compositions of tourmaline can be observed including regular increases of alkali deficiency in the X(3a) site from peripheral (chlorite-epidote-prehnite) to internal (sericite and/or pyrophyllite) alteration zones. In the central part of these systems tourmaline is absent and the alteration assemblage is characterized by an andalusitedumortierite-quartz association. Such changes in mineral assemblage are related to an increase in temperature from 250 to 350–400 °C and to decreases in pH and Eh, from the outer toward the inner parts of the hydrothermal system. The zonation of the borosilicate-bearing alteration systems is similar to that of aluminosilicate-bearing hydrothermal systems (muscovite, pyrophyllite, andalusite) developed in volcanic rocks. A kaolinite-alunitejasperoid assemblage is generally associated with the borosilicate alteration, and seems related to a late hydrothermal phase mainly located in graben structures.
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References
Badia, D., Fuchs, Y. (1987) The geodynamic-magmatic evolution of the European plate during late Carboniferous and Lower Permian and its significance for volcanic hosted uranium deposits. Monograph Series on Mineral Deposits, Vol. 27. Bornträger, Berlin Stuttgart, pp. 59–69
Bandyopadhyay, B.K., Slack, J.F., Palmer, M.R., Roy, A. (1993) Tourmalinites associated with stratabound massive sulphide deposits in the Proterozoic Sakoli Group, Nagpur district, central India. In: Maurice, T. (ed.) Proceedings of the Eighth Quadrennial IAGOD Symposium. Schweizerbart'sche Verlagsbuchhandlung, Stuttgart, pp. 867–885
Battistini, G. di, Bargossi, G.M., Spotti, G., Toscani, L. (1988) Andesites of the late Hercynian volcanic sequence in Trento-Alto Adige (northern Italy). Rend. Soc. Ital. Mineral. Petrol. 43:1087–1110
Brimhall Jr., G.H. (1977) Early fracture-controlled disseminated mineralization at Butte, Montana. Econ. Geol. 72:37–59
Bryndzia, L.T. (1988) The origin of diaspore and pyrophyllite in the Foxtrap pyrophyllite deposit, Avalon Peninsula, Newfoundland: a reinterpretation. Econ. Geol. 83:450–453
Cadel, G. (1986) Geology and uranium mineralization of the Collio basin (central southern Alps, Italy). Uranium 2:215–240
Cadel, G., Fuchs, Y., Meneghel, L. (1987) Uranium mineralization associated with the evolution of a Permo-Carboniferous volcanic field. Examples from Novazza and Val Vedello (northern Italy). Uranium 3:407–421
Cargill, D.G., Lamb, J., Young, M.J., Rugg, E.S. (1976) Island copper. In: Sutherland Brown, A. (ed.) Porphyry deposits of the Canadian Cordillera. Can. Institute of Mining and Metallurgy, Special Volume 15:206–218
Cathelineau, M. (1988) Cation site occupancy in chlorites and illites as a function of temperature. Clay Minerals 23:471–485
Cyr, J.B., Pease, R.B., Shroeter, T.G. (1984) Geology and mineralization at Equity Silver Mine. Econ. Geol. 79:947–968
Eaton, P.C., Setterfield, T.N. (1993) The relationship between epithermal and porphyry hydrothermal systems within the Tavua Caldera, Fiji. Econ. Geol. 88:1053–1083
Ethier, V.G., Campbell, F.A. (1977) Tourmaline concentrations in Proterozoic sediments of the southern Cordillera of Canada and their economic significance. Can. J. Earth Sci. 14:2348–2363
Foil Jr, F.F., Fuchs, Y., Myers, P.E. (1989) Chemistry of alkalideficient schorls from two tourmaline-dumortierite deposits. Am. Mineralogist 74:1317–1324
Force, E.R., Djaswadi, S., Van Leutween, T. (1981) Exploration for porphyry copper metal deposits based on rutile distribution: a test in Sumatra. Indonesia Directorate Mineral Res. Bull. 1(1): 13p
Fuchs, Y. (1987) Zonalité des différents types de tourmalines dans le systéme hydrothermal de Novazza, (Alpes Bergamasques, Italie du Nord); C.R. Acad. Sci. 305, II:1507–1510
Fuchs, Y. (1989) Hydrothermal alteration at the Novazza volcanic field and its relation to the U-Mo-Zn Novazza deposit, northern Italy; in Metallogenesis of Uranium Deposits, IAEA, Vienna, TC-542/11, 137–151
Fuchs, Y., Lagache, M. (1994) Les transformations chlorite-tourmaline en milieu hydrothermal, exemples naturels et données expérimentales. C.R. Acad. Sci., Paris, T. 319, II, 907–913
Gustafson, L.B., Hunt, J.P. (1975) The porphyry copper deposit at El Salvador, Chile. Econ. Geology 70:857–912
Hastings, J.S., Burkhart, T.H., Richardson, R.E. (1988) Geology of the Florida Canyon gold deposit, Pershing County, Nevada. In: Schafer, R.W., Cooper, J.J., Vikre, P.G. (ed.) Bulk mineable precious metal deposits of the western United States. Geological Society of Nevada, Reno, pp. 233–252
Hemley, J.J., Montoya, J.W., Marinenko, J.W., Luce, R.W. (1980) Equilibria in the system Al2O3-SiO2-H2O and some general implications for alteration/mineralization processes. Econ. Geol. 75:210–228
Irvine, T.N., Baragar, W.R.A. (1971) A guide to the chemical classification of the common volcanic rocks. Can. J. Earth Sci., 8, 523–548
Kolotov, B.A., Maloglavetz, V.G., Kiceleva, E.A. (1969) Types structuraux des champs minéralisés et des gisements molybdéno-uranifères. (in Russian) Sovietskaïa Geologia 12, 10:124–129
Krupp, R. (1981) Die Geologie des Moschellandberg-Vulkankomplexes (Pfalz) und seiner Erzvorkommen. Mitt. Polychim. 69:6–26
Krupp, R. (1984) The Nahe caldera-a resurgent caldera in the Permo-Carboniferous Saar Nahe basin, SW Germany. Geol. Rundsch. 73:981–1005
Laverov, N.P., Zaparojetz, A.A., Kantsel, A.K., Ribalov, B.L., Shin, H.T. (1965) Quelques particularités des gisements urano-molybdénifères associés à des intrusions volcaniques acides (in Russian). Geologia rudnikh mestorojdeny 6:1–7
Lebedev-Zinoviev, A.A., Modnikov, I.S. (1971) Influence de la morphologie et de la structure interne des appareils volcaniques sur la localisation de la minéralisation urano-molybdénifère. Izvestia Vyshykh Utbechnik Zavedeniy (in Russian). Geologia i Razvedka 5:58–64
MacAllistair, A.L., Lamarche, R.Y. (1972) Mineral deposits of southern Quebec and New Brunswick. Guidebook Excursion A-58-C-58. International Geological Congress, Montreal, 95p
Maury, R., Fuchs, Y (1991) Tourmalines structural refinement based on Mössbauer spectrometry. EUG VI, Strasbourg. Diffusion and order-disorder kinetics in minerals (abstract). Terra 3:11
Modnikov, I.S., Lebedev-Zinoviev, A.A. (1969) Relations entre dykes et minéralisations urano-molybdénifères dans certains gisements encaissés dans des appareils volcaniques (in Russian). Geologia rudnikh mestorodjeny 5:34–47
Morgan VI, G.B., London, D. (1989) Experimental reactions of amphibolite with boron-bearing aqueous fluids at 200 MPa, tourmaline stability and partial melting in mafic rocks. Contr. Min. Petrology 102:281–297
Mustard, H. (1986) Geology and genesis of the Kidston gold deposit. In: MacDonald, A.J. (ed.) Gold '86. Konsult International Inc., Willowdale, Ontario, pp. 404–415
Mutschler, F.E., Griffin, M.E., Stevens, D.S., Shanon, S.S. (1985) Precious metals deposits related to alkaline rocks in the North American Cordillera — An interpretative review. Trans Geol. Soc. S. Afr. 88:355–377
Paulet, P.H. (1992) Etude des altérations hydrothermales à borosilicates de la Humboldt Range (Nevada, USA). Unpublished Thesis, Université Pierre et Marie Curie, Paris, 153p
Paulet, P.H., Foit Jr, F.F., Fuchs, Y., Maury, R., Rosenberg, P.E. (1991) Zonalité des différents types de borosilicates dans le système hydrothermal à or-argent de la Humboldt Range, Pershing County, Nevada, USA. C. R. Acad. Sci. 313, II:1155–1162
Plimer, I.R. (1986) Tourmalinites from the Golden Dyke dome, northern Australia. Mineral. Deposita 21:263–270
Plimer, I.K. (1987) The association of tourmalinite with stratiform scheelite deposits. Mineral. Deposita 22:282–291
Plimer, I.K. (1988) Tourmalinites associated with Australian Proterozoic submarine exhalative ores. In: Friedrich, G.H., Herzig, P.M. (eds.) Base metal sulfide deposits in sedimentary and volcanic environments. Springer, Berlin Heidelberg New York, pp. 255–283
Plimer, I.R., Lees, T.C. (1988) Tourmaline-rich rocks associated with the submarine hydrothermal Rosebery Zn-Pb-Cu-Ag-Au deposit and granites in western Tasmania, Australia. Mineral. Petrol. 38:81–103
Prax, J.Y. (1979) Géologie du district minier de Saint Geniez d'Olt (Aveyron): relation entre le volcanisme Permo-Houiller et les minéralisations associées (F, Ba, U). Unpublished Thesis, Université Paris Sud, Orsay, 151p
Rojkovic, I. (1969) Petrography and geochemistry of Permian quartz porphyries in relation to U-Mo-Cu mineralization. Geol. Zbornik. 20:87–114
Rojkovic, I, Novotny, L., Haber, M. (1993) Stratiform and vein U, Mo and Cu mineralization in the Novoveska Huta area, CSFR. Mineral. Deposita 28:58–65
Ronkos, C.J. (1986) Geology and interpretation of geochemistry at the Standard mine, Humboldt County, Nevada. J. Geochem. Explor. 25:129–137
Rosenberg, P.E., Foit Jr., F.F. (1977) Coupled substitutions in the tourmaline group. Contr. Min. Petrology 62:109–127
Rosenberg, P.E., Foit Jr., F.F. (1979) Synthesis and characterization of alkali-free tourmaline. Am. Mineral. 64:180–186
Schmidt, R.G. (1985) High-alumina hydrothermal systems in volcanic rocks and their significance to mineral prospecting in the Carolina slate belt. U.S. Geol. Survey Bull. 1562:59p
Sillitoe, R.H., Grauberger, G.L., Elliot, J.E. (1985) A diatreme hosted gold deposit at Montana Tunnels, Montana. Econ. Geol. 80:1707–1721
Slack, J.F. (1982) Tourmaline in Appalachian-Caledonian massive sulphide deposits and its exploration significance. Inst. Mining Metall. Trans. 91:B81-B89
Slack, J.F. (1993) Models for tourmalinite formation in the Middle Proterozoïc Belt and Purcell Supergroups (Rocky Mountains) and their exploration significance. Current Research, part E, Geological Survey of Canada Paper 93-1E, 33–40
Slack, J.F., Coad, P.R. (1989) Multiple hydrothermal and metamorphic events in the Kidd Creek volcanogenic massive sulphide deposit, Timmins, Ontario: evidence from tourmalines and chlorites. Can. J. Earth Sci. 26:694–715
Slack, J.F., Palmer, M.R., Stevens, B.P.J., Barnes, R.G. (1993) Origin and significance of tourmaline-rich rocks in the Broken Hill district, Australia. Econ. Geol. 88:505–541
Taner, M.F., Martin, R.F. (1993) Significance of dumortierite in an aluminosilicate rich alteration zone, Louvicort, Quebec. Can. Mineral. 31:137–146
Taylor, B.E., Slack, J.F. (1984) Tourmalines from Appalachian-Caledonian massive sulfide deposits: textural, chemical and, isotopic relationships. Econ. Geol. 79:1703–1726
Teal, L.W., Martin, D.M., Bersch, M.G., Pearson, M.F. (1987) Gold mineralization in Oligocene age rhyolitic host rocks, Paupers Dream property, SW Montana. SME Annual Meeting 1987, Denver, pp. 27–30
Turner, W.S. (1982) A study of the wall rock alteration and devitrification zoning surrounding the Ben Lomond U-Mo deposit, North Queensland. Unpublished Ph.D. Thesis, James Cook University, Townsville, Queensland, 183 p
Valsardieu, C.A., Duccio, S., Cocquio, R., Bauchau, C. (1980) Uranium-molybdenum mineralization at Ben Lomond (Hervey Range, Queensland, Australia). Proc. Austr. Inst. Min. Metall. 273:27–35
Vikre, P.G. (1981) Silver mineralization in the Rochester district, Pershing County, Nevada. Econ. Geol. 76:580–609
Wallace, A.R. (1989) The Relief Canyon gold deposit, Nevada: a mineralized solution breccia. Econ. Geol. 84:279–290
Wen Yang (1990) Solubilities of selected borosilicate minerals between 25 °C and 250 °C and P v = P H2O. Unpublished Ph.D. Thesis, Washington State University, Pullman, 152p
Williams, P.J. (1991) Geology, alteration and mesothermal Au-Ag mineralization associated with a volcanic intrusive complex at Mt Shamrock-Mt Ophir, SE Queensland. Mineral. Deposita 26:11–17
Wojdak, P.J., Sinclair, A.J. (1984) Equity Silver silver-copper-gold deposit: alteration and fluid inclusion studies. Econ. Geol., 79, 969–990
Wright, H.D., Schulhof, W.P. (1957) Mineralogy of the Lone Eagle uranium-bearing mine in the Boulder Batholith, Montana. Econ. Geol. 52:115–131
Zhang, J.S., Passchier, C.W., Slack, J.F., Fliervoet, T.F., Boorder H. de (1994) Cryptocrystalline Permian tourmalinites of possible metasomatic origin in the Orobic Alps, northern Italy. Econ. Geol. 89:391–396
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Fuchs, Y., Maury, R. Borosilicate alteration associated with U-Mo-Zn and Ag-Au-Zn deposits in volcanic rocks. Mineral. Deposita 30, 449–459 (1995). https://doi.org/10.1007/BF00196404
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DOI: https://doi.org/10.1007/BF00196404