Abstract
In the ca. 3.8 b.y.-old Isua supracrustal belt, West Greenland, pyrrhotite and chalcopyrite occur as strata-bound mineralizations in layered tuffaceous amphibolites and in an iron-formation. Mineralizations with more complex mineral assemblages comprising galena and sulphides of Ni, Sb, Cd, and Ag are of limited extent only. Field relationships, rare-earth elements and isotopic data indicate that the sulphides are partly of submarine exhalative origin, and partly derived through leaching of basaltic rocks. The sulphides were precipitated on the sea-floor without influence of sulphur bacteria. The mineral zonation was governed by differences in Eh and pH in the depositional environment.
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References
Allaart JH (1976) The pre-3760 m.y. old supracrustal rocks of the Isua area, central West Greenland, and the associated occurrences of quartz banded ironstone. In: Windley BF (ed) The early history of the Earth. John Wiley and Sons, London, pp 177–189
Appel PWU (1979a) Stratabound copper sulphides in a banded iron-formation and in basaltic tuffs in the early Precambrian Isua supracrustal belt, West Greenland. Econ Geol 74:45–52
Appel PWU (1979b) Cosmic grains in an iron-formation from the early Precambrian Isua supracrustal belt, West Greenland. J Geol 87:573–578
Appel PWU (1980) On the early Archaean Isua iron-formation, West Greenland. Precam Res 11: 73–87
Appel PWU, Moorbath S, Taylor PN (1978) Least radiogenic terrestrial lead from Isua, West Greenland. Nature (London) 272:524–526
Fripp REP (1976) Stratabound gold deposits in Archaean banded iron-formations, Rhodesia. Econ Geol 71:58–75
Fryer BJ (1977a) Rare earth evidence in iron-formations for changing Precambrian oxidation states. Geochim Cosmochim Acta 41:361–367
Fryer BJ (1977b) Trace element geochemistry of the Sokoman iron-formation. Can J Earth Sci 14:1598–1610
Garrels RM (1960) Mineral equilibria. Harper, New York, 254 pp
Garrels RM, Christ CL (1965) Solutions, minerals and equilibria. Harper, New York, 450 pp
Laajoki K (1975) Rare-earth elements in Precambrian iron-formations in Värylänkylä, South Poulanka area, Finland. BuË Geol Soc Finl 47:93–107
Large RR (1977) Chemical evolution and zonation of massive sulphide deposits in volcanic terrains. Econ Geol 72:549–572
Monster J, Appel PWU, Thode HG, Schidlowski M, Carmichael CM, Bridgewater D (1979) Sulfur isotope studies in Early Archaean sediments from Isua, West Greenland: Implications for the antiquity of bacterial sulfate reduction. Geochim Cosmochim Acta 43:405–413
Moorbath S, O’Nions RK, Pankhurst RJ (1973) Early Archaean age for the Isua iron-formation, West Greenland. Nature (London) 245:138
Piper DZ, Veh HH, Bertrand WG, Chase RL (1975) An iron-rich deposit from the northeast Pacific. Earth Planet Sci Lett 26:114–120
Schidlowski M (1978) Evolution of the earth’s atmosphere: Current state and exploratory concepts. In: Noda H (ed) Origin of life. Center Acad Publ, Tokyo, Japan, pp 3–20
Spence DD, de Rosen-Spence AF (1975) The place of sulfide mineralization in the volcanic sequence at Noranda, Quebec. Econ Geol 70:90–101
Tischendorf G, Ungethüm H (1965) Zur Anwendung von Eh-pH-Beziehungen in der geologischen Praxis. Z Angew Geol 11:55–67
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© 1982 Springer-Verlag Berlin Heidelberg
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Appel, P.W.U. (1982). Strata-Bound Sulphides in the Early Archaean Isua Supracrustal Belt, West Greenland. In: Amstutz, G.C., et al. Ore Genesis. Special Publication of the Society for Geology Applied to Mineral Deposits, vol 2. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-68344-2_40
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DOI: https://doi.org/10.1007/978-3-642-68344-2_40
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