HERMIONE, EVOLUTION OF ATe-BEARING EPITHERMAL MINERALIZATION, ARGOLIS, HELLAS

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Publiée : Ιαν 1, 2007
DOI : https://doi.org/10.12681/bgsg.16782
S. Tombros
Department of Geology, Laboratory of Ore Deposits and Volcanology, University of Patras
K. St. Seymour
Department of Geology, Laboratory of Ore Deposits and Volcanology, University of Patras; Department of Geography, Concordia University
Résumé

The Cu-Te-bearing pyrite deposits of Hermione, Argolis are hosted in Miocenic ophiolites. The ophiolites are overlain by a shale-sandstone formation with intercalations of limestones and manganiferous sedimentary rocks. The ore deposits form irregular lenticular or stratiform ore bodies, and veins. These ore bodies are related to volcanic activity in an arc-related rift at the margins of a palaeocontinent. Late N- to NNE-trending, sinistral, milky quartz-pyrite-calcite veins cut the host ophiolites. Alteration haloes of quartz-calcite, albite-sericitechlorite, and chalcedony-epidote-clay minerals are developed in the lavas as concentric shells, or as envelops that parallel the quartz veins. The telluriumbearing mineralization is developed in two successive stages, characterized by the assemblages: pyrite-(pyrrhotite)-magnetite-chalcopyrite-sphalerite (Stage I) and galena-sphalerite-freibergite-marcasite-chalcocite (Stage II), followed by a supergene stage. The cobaltiferous pyrite-chalcopyrite geothermometer defined two ranges of last-equilibration temperatures: 220° to 250°Cfor Stage I, and 120° to 195°Cfor Stage II. The calculated δ18 Ο and SD compositions of the mineralizing fluids, at 200° and 250°C, reflect the dominance of a magmatic component. The calculated δ SH2S fluid values reveal a magmatic source for the sulphur, with minor contribution from submarine sediments, whereas tellurium is proposed to be derived from a mafic-ultramafic source.

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  • Rubrique
  • Mineralogy-Petrology-Geochemistry-Economic Geology
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Références
Aronis, G., 1951. Research on the iron-pyrite deposits in the Hermione district, I.G.M.E., 2, 1-35.
Barnes, L.H., 1979. Geochemistry of hydrothermal ore deposits. In H.L. Barnes (ed.), Special Edition, Wiley, J., and Sons inc., New York, 800pp.
Benzen, N.I, Yeremin, N.I., Narazauli, I.G., Pozdnyakova, N.V., and Sergeyevan, Y.E., 1978. Cobalt distribution and the pyrite-chalcopyrite geothermometer, Geochemical International, 15, 1-10.
Clayton, R.N., Muffler, L.J.P., and White, D.E., 1972. Oxygen isotope fractionation study of calcite and silicates of the River Ranch, California, American Journal of Science, 266, 968-979.
Clayton, R.N., and Mayeda, T.K., 1963. The use of bromine penta-fluoride in the extraction of oxygen from oxides and silicates for isotopie analysis, Geochemica et Cosmochimica Acta, 27,43-52.
Clift, P.D., and Dixon, J.E., 1998. Jurassic ridge collapse, subduction initiation and ophiolite obduction in the southern Greek Tethys, Eclogae Geology Helvetica, 91, 128-139.
Clift, P.D., and Robertson, A.H.F., 1990. Deep-water basins within a Mesozoic carbonate platfrom, Argolis, Greece, Journal of Geological Society of London, 147, 825-835.
Cooke, R., Mc Phail, D., and Bloom, M., 1996. Epithermal gold mineralization, Acupan, Baguio district, Phippines: Geology, mineralization, alteration and the thermochemical environment of ore deposition, Economic Geology, 94, 243-272.
Dostal, J., Toscani, L., Photiades, Α., and Capedri, S., 1991. Geochemistry and petrogenesis of Tethyan ophiolites from northern Argolis (Peloponnesus, Greece), European Journal of Mineralogy, 3, 105-121.
Doutsos, T., Pe-Piper, G., Boronkay, K., and Koukouvelas, I., 1993. Kinematics of the central Hellenides, Tectonics, 12, 936-953.
Friedman, L, and O' Neil, J.R, 1977. Compilation of stable isotope fractionation factors of geochemical interest, US Geological Survey Professional Paper, 440, 1-12.
Fritz, P., Drimmie, R.J., and Norwick, K., 1974. Preparation of sulfur dioxide for mass spectrometer analysis by combustion of sulfide with copper oxide, Analytical Chemistry, 76, 164-166.
Hatzipanagiotou, K., Tsikouras, B., and Gaitanakis, P., 1988. Study of the ophiolitic outcrops in central Argolis: Ophiolite mélange and residual ophiolitic nappe, Annales Gèologiues des Pays Helléniques, 33,475-492.
Hedenquist, J.W., and Lowenstern, J.B., 1994. The role of magmas in the formation of hydrothermal ore deposits, Nature, 370, 519-527.
Hubert, A.E., and Chao, T.T., 1985. Determination of gold, indium, tellurium, and thallium in the same sample digestion of geological materials by atomic-absorption spectrometry and twostep solvent extraction, Talanta, 32, 523-548.
Hutchison, N.M., and Scott, D.S., 1981. Sphalerite geobarometry in the Cu-Fe-Zn-S system, Economic Geology, 76, 143-153.
Marinos, G., 1955. The granitic rocks of Argolis and the age of the shale-sandstone formation, Bulletin of Geological Society of Greece, 1, 45-59.
Marinos, G., 1953. Preliminary studies of the pyrite deposits of Plepi area, Ermioni, I.G.M.E, Unpublished Essay, 3, 100pp.
Meier, A.L., Grimes, D.J., and Ficklin, W.H., 1994. Inductively coupled plasma mass spectrometry: A powerful analytical tool for mineral resource and environmental studies, US Geological Survey Circular, 1103, 67-68.
Ohmoto, H., and Lasaga, A.C., 1982. Kinetics of reactions between aqueous sulfates and sulfides in hydrothermal systems, Geochemica et Cosmochimica Acta, 46, 1727-1745.
Ohmoto, H., and Rye, R.O., 1979. Isotopes of sulfur and carbon. In H.L. Barnes (ed.), Geochemistry of hydrothermal ore deposits, 2" edition, New York, Wiley Interscience, 509-567.
O'Neil, J.R., and Taylor, H.P.Jr, 1972. Oxygen isotope fractionation between muscovite and water, Journal of Geophysical Research, 74, 6012-6022.
Paraskevopoulos, G., 1969. Mineral Deposits, University of Athens Publication, 376pp.
Robertson, A.H.F., Clift, P.D., Degnan, P.J., and Jones, G., 1991. Palaeogeographic and palaeotectonic evolution of the eastern Mediterranean Neotethys, Palaeogeography, Palaeoclimatology, Palaeoecology, 87, 289-343.
Saccani, E., Padoa, E., and Photiades, Α., 2004. Triassic mid-ocean ridge basalts from the Argolis peninsula (Greece): New constraints for the early oceanization phases of the Neo-Tethyan Pindos basin. In Y. Dilekand and P.T. Robinson (eds), Ophiolites in earth history, Geological Society of London Special Publication, 218,109-127.
Saccani, E., Padoa, E., and Photiades, Α., 1991. Tectono-magmatic significance of Triassic MORBS from the Argolis peninsula (Greece): Implications for the origin of the Pindos ocean, European Journal of Mineralogy, 3,105-121.
Scott, S.D., 1973. Experimental calibration of the sphalerite geobarometer, Economic Geology, 68, 466-474.
Scott, S.D., and Barnes, H.L., 1971. Sphalerite geothermometry and geobarometry, Economic Geology, 66, 653-669.
Sideris, C, and Skounakis, S., 1987. Metallogeny in the basic rocks of a paleosubduction area: The case of Ermioni area Cu-bearing pyrite mines (East Peloponnesos, Greece), Chemie der Erde, 47, 93-96.
Sideris, C, Skounakis, S., and Simantov, J., 1987. Trace and REE geochemistry of a basic lava series from the Ermioni area (Argolis peninsula) Greece, Ofioliti, 12, 1-107.
Skounakis, S., and Sovatzoglou-Skounaki, E., 1975. The Co and Ni traces distribution within the deposits of Cu-bearing pyrite of Ermioni, Argolida, Bulletin of Geological Society of Greece, 13, 54-60.
Skounakis, S., and Sovatzoglou-Skounaki, E., 1981. The CuFeS2-FeS2-Co-contribution geothermometer, within the deposits of Cu-bearing pyrite of Ermioni, Argolida and Perivoli Grevena, Bulletin of Geological Society of Greece, 15, 74-78.
Spry, G.P., Paredes, M.M., Foster, F., Truckle, S.J., and Chadwick, H.T., 1996. Evidence for a genetic link between gold-silver telluride and porphyry mineralization at the Golden Sunlight Deposit, Whitehall, Montana: Fluid inclusion and stable isotopes studies, Economic Geology, 91, 507-526.
Suzuoki, T., and Epstein S., 1976. Hydrogen isotope fractionation between OH-bearing minerals and water, Geochemica et Cosmochimica Acta, 40, 1229-1240.
Taggart, J.E.Jr, Lindsey, J.R., Scott, B.A., Vivit, D.V., Barrel, A.J., and Stewart, K.C., 1987. Analysis of geological materials by wavelength-dispersive X-ray fluorescence spectrometry, US Geological Survey Professional Paper, 1770, 1-19.
Tsikouras, B., Traki, K., Katsantouri, O., and Hatzipanagiotou, K., 1989. Contribution to geological structure and petrography of the ophiolite melange and relict ophiolite nappe in northern Argolis, Bulletin of Geological Society of Greece, 13, 347-362.
Vamavas, S.P., and Panagos, A.G., 1989. Some observations on the sulphide mineralization at the Mesozoic ocean ridge in the Hermione area, Greece, Chemie der Erde, 49, 81 -90.
Varnavas, S.P., and Panagos, A.G., 1984. Mesozoic metalliferous sediments from the ophiolites of Ermioni, Greece: Analogue to recent mid-ocean ridge ferromanganese deposits, Chemical Geology, 42, 227-242.
Voreadis, G., 1958, Genesis of the pyrite and manganese deposits of Ermioni and their relationships, Bulletin of Geological Society of Greece, 3, 50-63.
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