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Trace elements in natural metallic iron from Disko Island, Greenland

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Abstract

The largest occurrence of natural metallic iron on Earth is on the island of Disko, Greenland. Metallic iron is found there in a variety of different types, from small metal particles in basalts to large meter-sized blocks. We have studied three different types of metallic iron: small metal spherules (< 300 μm) in basaltic magma; larger metal grains (300 μm-3 mm), often composed of aggregates of smaller particles, in similar host rocks; and massive iron lumps (up to several tons). Analytical data for 13 siderophile elements in samples from these three types are presented. All metals analysed have a distinctly crustal pattern of siderophile elements. High Co/Ni, Re/Ir or W/Ir ratios clearly demonstrate that a meteoritic origin for the metallic iron must be excluded. Since the Co/Ni and Re/Ir ratios are approximately chondritic in the upper mantle of the Earth, a mantle origin for the Disko metals can also be ruled out. This supports earlier petrological and geological evidence that the metallic iron was formed through reduction of basaltic magma by carbon derived from Tertiary shales and coals. Significant differences in absolute and relative abundances of siderophile elements occur among the three kinds of metals. The strongly siderophile elements (e.g. Ir, Re, Ni) increase in concentration from the small metal spherules through the larger grains to the massive iron lumps. The contents of less strongly siderophile elements (P, W, Ga) decrease in the same sequence. Evidence is presented that the small metal spherules are formed by in situ reduction. Larger iron metal grains and massive iron lumps are composed of small spherules, accumulated by gravitational settling in a magma reservoir. These metal cumulates have extracted highly siderophile elements from a larger volume of basaltic melt.

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References

  • Basaltic Volcanism Study Project (1981) Basaltic volcanism on the terrestrial planets. Pergamon Press, New York

    Google Scholar 

  • Bird JM, Weathers MS (1977) Native iron occurrences of Disko Island, Greenland. J Geol 85:359–371

    Google Scholar 

  • Bird JM, Goodrich CA, Weathers MS (1981) Petrogenesis of Uivfaq iron, Disko island, Greenland. J Geophys Res 86:11787–11805

    Google Scholar 

  • Buchwald VF (1975) Handbook of iron meteorites. Berkeley Los Angeles London University of California Press

    Google Scholar 

  • Chou CL, Shaw DM, Crocket JH (1983) Siderophile trace elements in the earth's oceanic crust and upper mantle. J Geophys Res 88:A507-A518

    Google Scholar 

  • Crocket JH, Kuo HY (1979) Sources for gold, palladium and iridium in deep sea sediments. Geochim Cosmochim Acta 43:831–842

    Article  Google Scholar 

  • Ewart A (1979) A review of the mineralogy and chemistry of tertiary-recent dacitic, latitic, rhyolitic and related salic volcanic rocks. In: Barker F (ed) Trondhjemites, dacites and related rocks. Developments in petrology, vol 6. Elsevier, New York

    Google Scholar 

  • Fundal E (1975) The Uivfaq dike and related hybrid dikes from southern Disko, West Greenland. Medd Grønl 195:1–28

    Google Scholar 

  • Gladney ES, Burns CE, Roelandts I (1983) 1982 Compilation of elemental concentrations in eleven United States Geological Survey Rock Standards. Geostandards Newsl VII:3–226

    Google Scholar 

  • Goodrich CA (1984) Phosphoran pyroxene and olivine in silicate inclusions in natural iron-carbon alloy, Disko Island, Greenland. Geochim Cosmochim Acta 48:1115–1126

    Article  Google Scholar 

  • Goodrich CA, Bird JM (1985) Formation of iron-carbon alloys in basaltic magma at Uivfaq, Disko Island: the role of carbon in mafic magmas. J Geol 93:475–492

    Google Scholar 

  • Hansen M (1958) Constitution of binary alloys. McGraw-Hill, New York Toronto London

    Google Scholar 

  • Hertogen J, Janssens M-J, Palme H (1980) Trace elements in ocean ridge basalt glasses: implications for fractionations during mantle evolution and petrogenesis. Geochim Cosmochim Acta 44:2125–2143

    Article  Google Scholar 

  • Jaguotz E, Palme H, Baddenhausen H, Blum K, Cendales M, Dreibus G, Spettel B, Lorenz V, Wänke H (1979) The abundances of major, minor and trace elements in the Earth's mantle as derived from primitive ultramafic nodules. Proc 10th Lunar Plant Sci Conf. Geochim Cosmochim Acta, Suppl 11:2031–2050

    Google Scholar 

  • Kelly WR, Larimer JW (1977) Chemical fractionations in meteorites. VIII. Iron meteorites and the cosmochemical history of the metal phase. Geochim Cosmochim Acta 41:93–111

    Article  Google Scholar 

  • Kesson SE, Lindsley DH (1975) The effects of Al3+, Cr3+ and Ti3+ on the stability of armalcolite. Proc 6th Lunar Planet Sci Conf (Geochim Cosmochim Acta [Suppl 6]) 1:911–920

    Google Scholar 

  • Kruse H (1979) Spectra processing with computer graphics. In: Computers in activation analysis and gamma ray spectroscopy. Proceedings of the American Nuclear Society Topical Conference at Mayaguez, Puerto Rico, DOE, Conf-78421, pp 76–84

  • Kubaschewski O (1982) Iron-binary phase diagrams. Springer, Berlin Heidelberg New York

    Google Scholar 

  • Lindsley DH, Kesson SE, Hartzman MJ, Cushman MK (1974) The stability of armalcolite: experimental studies in the system MgO-Fe-Ti-O. Proc 5th Lunar Conference (Geochim Cosmochim Acta [Suppl 5]) 1:521–534

    Google Scholar 

  • Mason B (1971) Handbook of elemental abundances in meteorites. Gordon and Breach, New York Paris London

    Google Scholar 

  • Melson WG, Switzer G (1966) Plagioclase-spinel graphite xenoliths in metallic iron-bearing basalts, Disko Island, Greenland. Am Mineral 51:664–676

    Google Scholar 

  • Morgan JW, Wandless GA, Petrie RK, Irving AJ (1981) Composition of the earth's upper mantle. I. Siderophile trace elements in ultramafic nodules. Tectonophysics 75:47–67

    Article  Google Scholar 

  • Murase T, McBirney AR (1973) Properties of some common igneous rocks and their melts at high temperatures. Geol Soc Am Bull 84:3563–3592

    Google Scholar 

  • Myers J, Euster HP (1983) The system Fe-Si-O: oxygen buffer calibrations to 1,500 K. Contrib Mineral Petrol 82:75–90

    Google Scholar 

  • Neumayr M (1897) Erdgeschichte Bd 1 S 108, 116. Bibliographisches Institut, Leipzig Wien

    Google Scholar 

  • Newsom HE, Palme H (1984) The depletion of siderophile elements in the Earth's mantle: new evidence from Molybdenum and Tungsten. Earth Planet Sci Lett 69:354–364

    Article  Google Scholar 

  • Nordenskiöld AE (1872) Account of an expedition to Greenland in the year 1870. Geol Mag 9:289–306, 355–368, 409–427, 449–463, 516–524

    Google Scholar 

  • Palme H, Suess HE, Zeh HD (1981) Abundances of the elements in the solar system. In: Schaifers K, Voigt HH (eds) LandoldtBörnstein, vol 2 (Astron Astrophys). Springer, Berlin Heidelberg New York, pp 257–273

    Google Scholar 

  • Pauly H (1969) White cast iron with cohenite, schreibersite and sulfides from tertiary basalts on Disko, Greenland. Medd Dan Geol Foren 19:8–26

    Google Scholar 

  • Pedersen AK (1977a) Tertiary volcanic geology of the Mellemfjord area south-west Disko. Rapp Grønl Geol Unders 81:35–51

    Google Scholar 

  • Pedersen AK (1977b) Dike intrusions along the south coast of Disko. Rapp Grønl Geol Unders 81:57–67

    Google Scholar 

  • Pedersen AK (1977c) Iron bearing and related volcanic rocks in the area between Gieseckes Dal and Hammers Dal, north-west Disko. Rapp Grønl Geol Unders 81:5–14

    Google Scholar 

  • Pedersen AK (1978) Graphitic andesite tuffs resulting from highMg tholeiite and sediment interaction; Nugssuaq, west Greenland. Bull Geol Soc Den 27:117–130

    Google Scholar 

  • Pedersen AK (1981) Armalcolite-bearing Fe-Ti oxide assemblages in graphite-equilibrated salic volcanic rocks with native iron from Disko, central west Greenland. Contrib Mineral Petrol 77:307–324

    Google Scholar 

  • Schmitt W (1984) Experimentelle Bestimmung von Metall/Sulfid/ Silikat-Verteilungskoeffizienten geochemisch relevanter Spurenelemente. Dissertation, Universität Mainz

  • Scott ERD (1972) Chemical fractionation in iron meteorites and its interpretation. Geochim Cosmochim Acta 36:1205–1236

    Article  Google Scholar 

  • Wänke H, Rieder R, Baddenhausen H, Spettel B, Teschke F, Quijano-Rico M, Balacescu A (1970) Major and trace elements in lunar material. Proc Apollo 11 Lunar Sci Conf (Geochim Cosmochim Acta [Suppl 1]) 2:1719–1727

    Google Scholar 

  • Wänke H, Baddenhausen H, Dreibus G, Jagoutz E, Kruse H, Palme H, Spettel B, Teschke F (1973) Multielement analyses of Apollo 15, 16, and 17 samples and the bulk composition of the moon. Proc Lunar Sci Conf 4th (Geochim Cosmochim Acta [Suppl 4]) 2:1461–1481

    Google Scholar 

  • Weckwerth G (1985) Feasibility of beta-ray spectrometry in INAA: Applications in geoand cosmochemistry. In: Sansoni B (ed) Instrumentelle Multielementanalyse. VCH Verlagsgesellschaft, Weinheim

    Google Scholar 

  • Wedepohl KH (1975) The contribution of chemical data to assumptions about the origin of magmas from the mantle. Fortschr Mineral 52:141–172

    Google Scholar 

  • Wedepohl KH (1981) Der primäre Erdmantel (Mp) and die durch Krustenbildung verarmte Mantelzusammensetzung (Md). Fortschr Mineral 59:203–205

    Google Scholar 

  • Wells PRA (1977) Pyroxene thermometry in simple and complex systems. Contrib Mineral Petrol 62:129–139

    Google Scholar 

  • Yoder MS Jr, Tilley CE (1962) Origin of basalt magmas: an experimental study of natural and synthetic rock systems. J Petrol 3:342–532

    Google Scholar 

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Part of a Ph.D. thesis by W. Klöck

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Klöck, W., Palme, H. & Tobschall, H.J. Trace elements in natural metallic iron from Disko Island, Greenland. Contr. Mineral. and Petrol. 93, 273–282 (1986). https://doi.org/10.1007/BF00389387

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  • DOI: https://doi.org/10.1007/BF00389387

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