Isotope systematics in vein gold from Brusson, Val d'Ayas (NW Italy), 1. Pb/Pb evidence for a Piemonte metaophiolite Au source

Chemical Geology

Volumn 127, Issue 1-3, 1996, Pages 111-124

  Pettke, Thomas ^a   Frei, Robert ^a  

^a UNIVERSITY OF BERN   (Switzerland)

Author keywords

[No Author keywords available]

Indexed keywords

GOLD; ISOTOPE SYSTEMATICS; METAOPHIOLITE; MINERALIZATION; QUARTZ VEIN;

ITALY, ALPS, VAL D'AYAS, BRUSSON;

EID: 0029751077     PISSN: 00092541     EISSN: None     Source Type: Journal    
DOI: 10.1016/0009-2541(95)00107-7     Document Type: Article

References (34)

1. Antweiler, J.C., Doe, B.R. and Delevaux, M.H., 1972. Lead isotope and other evidence on the bedrock source of placer gold at Hahns peak, Colorado. Econ. Geol., 67: 302-314.
2. Bearth, P., 1952. Geologie und Petrographic des Monte Rosa. Beitr. Geol. Karte Schweiz, NF 96, 103 pp.
3. Brigo, L., Ferrario, A. and Zuffardi, P., 1977. Gold distribution in the Alps. In: S. Jankovic (Editor), Jugoslavensko Udruzenje Nauka i Drustvo. Udruzenje Nauka i Drustvo, Belgrad, pp. 429-438.
4. Cameron, E.M., Cogulu, E.H. and Stirling, J., 1993. Mobilization of gold in the deep crust: Evidence from mafic intrusions in the Bamble Belt, Norway. Lithos, 30: 151-166.
5. Colomba, L., 1907. Osservazioni mineralogiche sui giacimenti auriferi di Brusson (Valle di Aosta). Atti R. Acad. Sci. Torino, 42: 904-922.
6. Curti, E., 1987. Lead and oxygen isotope evidence for the origin of the Monte Rosa gold lode deposits (Western Alps, Italy): A comparison with Archaean lode deposits. Econ. Geol., 82: 2115-2140.
7. Dal Piaz, G.V., Hunziker, J.C. and Martinotti, G., 1972. La zona Sesia-Lanzo e l'evoluzione tettonico-metamorphica delle Alpi nordoccidentali interne. Mem. Soc. Geol. Ital., 11: 433-466.
8. Diamond, L.W., 1986. Hydrothermal geochemistry of late-metamorphic gold-quartz veins at Brusson, Val d'Ayas, Pennine Alps, NW Italy. Ph.D. Thesis, Swiss Federal Institute of Technology (ETH), Zürich, pp. 246.
9. Diamond, L.W., 1990. Fluid inclusion evidence for P-V-T-X evolution of hydrothermal solutions in late-Alpine gold-quartz veins at Brusson, northwest Italian Alps. Am. J. Sci., 290: 912-958.
10. Diamond, L.W. and Wiedenbeck, M., 1986. K-Ar radiometric ages of the gold-quartz veins at Brusson, Val d'Ayas, NW Italy: Evidence of mid-Oligocene hydrothermal activity in the northwestern Alps. Schweiz. Mineral. Petrogr. Mitt., 66: 385-393.
11. Escher, A., Masson, H. and Steck, A., 1993. Nappe geometry in the western Swiss Alps. J. Struct. Geol., 15: 501-509.
12. Frey, M., Hunziker, J.C., O'Neil, J.R. and Schwander, H.W., 1976. Equilibrium-disequilibrium relations in the Monte Rosa granite, Western Alps: Petrological, Rb-Sr and stable isotope data. Contrib. Mineral. Petrol., 55: 147-179.
13. Gosso, G., Dal Piaz, G.V., Piovano, V. and Polino, R., 1979. High pressure emplacement of early-Alpine nappes, postnappe deformation and structural levels (internal northwestern Alps). Mem. Sci. Geol., Univ. Padova, No. 32, 14 pp.
14. Grünenfelder, M., 1957. Erzmikroskopische Beobachtungen an den Goldquarzgängen von Gondo (Simplon, Wallis) und Alpe Formazzola (Val Calneggia, Tessin). Schweiz. Mineral. Petrogr. Mitt., 37: 1-8.
15. Gulson, B.L., Mizon, K.J. and Atkinson, B.T., 1993. Source and timing of gold and other mineralization in the Red-Lake area, northwestern Ontario, based on lead-isotope investigations. Can. J. Earth Sci., 30: 2366-2379.
16. Hart, S.R., Shimizu, N. and Sverjensky, D.A., 1981. Lead isotope zoning in galena: An ion microprobe study of a galena crystal from the Buik Mine, southeast Missouri. Econ. Geol., 76: 1873-1878.
17. Hattori, K., 1993. Diverse metal sources of Archaean gold deposits - evidence from in situ lead-isotope analysis of individual grains of galena and altaite in the Ross and Kirkland Lake deposits, Abitibi greenstone belt, Canada. Contrib. Mineral. Petrol., 113: 185-195.
18. Hurford, A.J., Hunziker, J.C. and Stöckhert, B., 1991. Constraints on the late thermotectonic evolution of the western Alps: Evidence for episodic rapid uplift. Tectonics, 10: 758-769.
19. Huttenlocher, H.F., 1934. Die Erzlagerstättenzone der Westalpen. Schweiz. Mineral. Petrogr. Mitt., 14: 22-149.
20. Keays, R.R., 1984. Archean gold deposits and their source rocks: The upper mantle connection. In: R.P. Foster (Editor), Gold '82. A.A. Balkema, Rotterdam, pp. 17-51.
21. Lattanzi, P.F., Curti, E. and Bastogi, M., 1989. Fluid inclusion studies on the gold deposits of the upper Anzasca valley, Northwestern Alps, Italy. Econ. Geol., 84: 1382-1397.
22. Laubscher, H.P., 1983. The late Alpine (periadriatic) intrusions and the Insubric line. Mem. Soc. Geol. Ital., 26: 21-30.
23. Mancktelow, N.S., 1990. The Simplon Fault Zone. Beitr. Geol. Karte Schweiz, NF 163, 74 pp.
24. Pettke, T., 1995. Radiogenic isotopes in fluid inclusions and hydrothermal minerals: Methods and application to epigenetic auriferous veins in the Monte Rosa Gold District, NW Italy. Ph.D. Thesis, University of Bern, Bern, 210 pp.
25. Pettke, Th. and Diamond, L.W., 1993. Rb-Sr isotope systematics of low salinity fluid inclusions and host quartz in mesothermal veins of the Monte Rosa Gold District, NW Italy. Abstr. ECROFI XII (12th Symp. Eur. Curr. Res. Fluid Inclusions), Arch. Mineral., 49: 158-160.
26. Pettke, T. and Diamond, L.W., 1995. Rb-Sr isotopic analysis of fluid inclusions in quartz: Evaluation of bulk extraction procedures and geochronometer systematics using synthetic fluid inclusions. Geochim. Cosmochim. Acta (in press).
27. Pettke, Th., Diamond, L.W., Villa, I.M., Tolstikhin, I.N. and Kamensky, I.L., 1994. He, Ar and Rb-Sr isotope systematics of fluid inclusions in quartz, vein minerals and native gold from epigenetic late Alpine Au-veins in NW Italy. Abstr. ICOG 8 (8th Int. Conf. Geochronol. Cosmochronol. Isot. Geol.), U.S. Geol. Surv., Cire., 1107: 249.
28. Pettke, T., Frei, R., Kramers, J.D. and Villa, I.M., 1995. Isotope systematics in vein gold from Brusson, Val d'Ayas (NW Italy), 2. (U + Th)/He and Ar in native Au and its fluid inclusions. Chem. Geol. (submitted).
29. Reinhold, T., 1916. Die Goldpyritgänge von Brusson in Piemont. Verb. Naturforsch. Ges. Basel, 27: 49-85.
30. Roedder, E., 1958. Technique for the extraction and partial chemical analysis of fluid-filled inclusions from minerals. Econ. Geol., 53: 235-269.
31. Solomon, M. and Groves, D.I., 1994. The geology and origin of Australia's mineral deposits. Oxford Monographs on Geology and Geophysics, 24. Oxford University Press, Oxford, 951 pp.
32. Stacey, J.S. and Kramers, J.D., 1975. Approximation of terrestrial lead isotope evolution by a two stage model. Earth Planet. Sci. Lett., 26: 207-221.
33. Stella, A., 1943. I giacimenti auriferi delle Alpi italiane. Mem. Descr. Carta Geol. Ital., 27: 1-134.
34. Yardley, B.W.D., Banks, D.A., Bottrell, S.H. and Diamond, L.W., 1993. Post-metamorphic gold quartz veins from NW Italy - The composition and origin of the ore fluid. Mineral. Mag., 57: 407-422.