Abstract
Hydrothermal ore bodies are the concentrated manifestations of the large-scale mass transfer of ore-forming elements by aqueous fluids flowing through the Earth's crust. Existing mass transfer estimates1–3 for hydrothermal ore-forming systems are based on ore reserve data, which do not take into account the mass of ore-forming elements dispersed in the metasomatized crust around the ore bodies. Here I report a method for the quantitative determination of this dispersed mass and hence the efficiency of ore formation. Application to the Panasqueira W–Cu(Ag)–Sn vein deposit in Portugal shows that only a few per cent of the hydrothermal ly introduced material (W, 33% ; Cu, 8% ; Sn, 3% ; Zn, 1.5%) is concentrated in the ore body itself, implying that much greater volumes of ore-forming fluid are required than previously supposed. The efficiency of Panasqueira vein formation in concentrating these elements is variable, reflecting the relative importance of fluid pressure4–6 and acid-consuming fluid/rock reactions7 in determining different ore mineral solubilities, but it is broadly similar to the efficiency of sea-water mixing in immediately removing Pb and Zn from black smoker fluids8.
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References
Elder, J. W. Geothermal Systems (Academic, London, 1981).
Cathles, L. M. Econ. Geol. 5, 439–487 (1983).
Campbell, A., Rye, D. & Petersen, U. Econ. Geol. 79, 1818–1832 (1984).
Hemley, J. J., Cygan, G. L. & d'Angelo, W. M. Geology 14, 377–379 (1986).
Helgeson, H. C. & Lichtner, P. C. J. geol. Soc. Lond. 144, 313–326 (1987).
Fournier, R. O. Rev. econ. Geol. 2, 45–62 (1985).
Eugster, H. P. Mineralog. Mag. 49, 7–23 (1985).
Converse, D. R., Holland, H. D. & Edmond, J. M. Earth planet. Sci. Lett. 69, 159–175 (1984).
Rose, A. W., Hawkes, H. E. & Webb, J. S. Geochemistry in Mineral Exploration (Academic, New York, 1979).
Ewers, G. R. & Keays, R. R. Econ. Geol. 72, 1337–1354 (1977).
Edmond, J. M., von Damm, K. L., McDuff, R. E. & Measures, C. I. Nature 297, 187–196 (1982).
Boyle, R. W. (ed.) Geochemical exploration: Canadian Inst. Min. Metall. Vol. 2 (1971).
Govett, G. J. S. & Pantazis, Th.M. Trans. Inst. Min. Metall. B80, 27–46 (1971).
Polya, D. A., Solomon, M., Eastoe, C. J. & Walshe, J. L. Econ. Geol. 81, 1341–1355 (1986).
MacLean, W. H. & Kranidiotos, P. Econ. Geol. 82, 951–962 (1987).
Lavery, J. H. J. geochem. Explor. 23, 35–60 (1985).
Bussink, R. W. Geologica Ultraiectina 33 (1984).
Oosterom, M. G., Bussink, R. W. & Vriend, S. P. Miner. Deposita 19, 283–288 (1984).
Kelly, W. C. & Rye, R. O. Econ. Geol. 74, 1721–1822 (1979).
Clark, A. H. Trans. Inst. Min. Metall. 73, 813–824 (1964).
Kelly, W. C. Servicos Geol. Portugal Commun. 81, 239–244 (1977).
d'Orey, F. C. Servicos Geol. Portugal Commun. 52, 117–167 (1967).
Marignac, M. C. C.R. Acad. Sci. Paris 277D, 269–272 (1973).
Marignac, M. C. Econ. Geol. 77, 1263–1266 (1982).
Polya, D. A. Abstr. Vol. Min. Dep. Study Group (University of Southampton, 1986).
Wimmers, D. Mineralog. Mag. 49, 745–748 (1985).
Thadeu, D. Servicos Geol. Portugal Commun. 32, 5–64 (1951).
Bussink, R. W., Kreulen, R. & de Jong, A. F. M. Bull. Mineralog. 107, 703–713 (1984).
Mello Mendes, F. Comportamento Mecanico de Rochas Xistosas (Imprensa Portuguse, Porto, 1960).
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Polya, D. Efficiency of hydrothermal ore formation and the Panasqueira W–Cu(Ag)–Sn vein deposit. Nature 333, 838–841 (1988). https://doi.org/10.1038/333838a0
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DOI: https://doi.org/10.1038/333838a0
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