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Geologische Rundschau

, Volume 84, Issue 4, pp 697–709 | Cite as

The Sudbury Structure (Ontario, Canada): a tectonically deformed multi-ring impact basin

  • A. Deutsch
  • R. A. F. Grieve
  • M. Avermann
  • L. Bischoff
  • P. Brockmeyer
  • D. Buhl
  • R. Lakomy
  • V. Müller-Mohr
  • M. Ostermann
  • D. Stöffler
Original Paper
  • 381 Downloads

Abstract

The occurrence of shock metamorphic features substantiates an impact origin for the 1.85 Ga old Sudbury Structure, but this has not been universally accepted. Recent improvements in knowledge of large-scale impact processes, combined with new petrographic, geochemical, geophysical (LITHOPROBE) and structural data, allow the Sudbury Structure to be interpreted as a multi-ring impact structure. The structure consists of the following lithologies: Sudbury Breccia —dike breccias occurring up to 80 km from the Sudbury Igneous Complex (SIC); Footwall rocks and Footwall Breccia — brecciated, shocked crater floor materials, in part thermally metamorphosed by the overlying SIC; Sublayer and Offset Dikes, Main Mass of the SIC and Basal Member of the Onaping Formation (OF) — geochemically heterogeneous coherent impact melt complex ranging from inclusion-rich basal unit through a dominantly inclusion-free to a capping inclusion-rich impact melt rock; Grey Member of OF — melt-rich impact breccia (suevite); Green Member of OF — thin layer of fall back ejecta; Black Member of OF — reworked and redeposited breccia material; Onwatin and Chelmsford Formations — post-impact sediments. Observational and analytical data support an integrated step-by-step impact model for the genesis of these units. Analysis of the present spatial distribution of various impact-related lithologies and shock metamorphic effects result in an estimated original rim-to-rim diameter of the final crater of 200 or even 280 km for the Sudbury Structure, prior to tectonic thrusting and deformation during the Penokean orogeny.

Key words

Sudbury Structure Impact crater Multi-ring basin Penokean orogeny Rb/Sr Sm/Nd Rare earth elements 

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References

  1. Avermann M (1992) Die Genese der allochthonen, polymikten Breccien der Onaping-Formation, Sudbury-Struktur, Ontario, Kanada. Ph D thesis mat-nat Fak (FB Geowiss) Universität Münster: 1–175Google Scholar
  2. Avermann M (1994) Origin of the polymict, allochthonous breccias of the Onaping Formation, Sudbury Structure, Ontario, Canada. In: Dressler BO, Grieve RAF, Sharpton VL (eds) Large meteorite impacts and planetary evolution. Geol Soc Am Spec Pap 293:265–274Google Scholar
  3. Avermann M, Brockmeyer P (1992) The Onaping Formation of the Sudbury Structure (Canada): an example of allochthonous impact breccias. Tectonophysics 216:227–234Google Scholar
  4. Becker L, Bada JL, Winans RE, Hunt JE, Bunch TE, French BM (1994) Fullerenes in the 1.85 billion-year-old Sudbury impact structure. Science 265:642–645Google Scholar
  5. Beswick AE (1994) Compositional discontinuities within the main mass on the North Range of the Sudbury Igneous Complex. Abstracts for the Sudbury Geology Workshop and Field trip, Oct 11 and 12, 1994, Sudbury, Ontario Geol SurvGoogle Scholar
  6. Boerner DE, Milkereit B, Naldrett AJ (1994) Introduction to the special section on the Lithoprobe Sudbury project. Geophys Res Lett 21:919–922Google Scholar
  7. Brockmeyer P (1990) Petrographische and geochemische Untersuchungen an polymikten Breccien der Onaping-Formation, Sudbury-Distrikt (Ontario, Kanada). PhD thesis mat-nat Fak (FB Geowiss) Universität Münster: 1–228Google Scholar
  8. Brockmeyer P, Deutsch A (1989) The origin of the breccias in the lower Onaping Formation, Sudbury Structure (Canada): evidence from petrographic observations and Sr-Nd isotope data. Lunar Planet Sci XX: 113–114Google Scholar
  9. Buhl D, Deutsch A, Lakomy R, Brockmeyer P, Dressler BO (1992) Sudbury Project (University of Münster — Ontario Geological Survey): (7) Sr-Nd in heterolithic breccias and gabbroic dikes. International Conference on Large Meteorite Impacts and Planetary Evolution, Sudbury, Canada, LPI Contribution 790:11–12Google Scholar
  10. Butler HR (1994) Lineament analysis of the Sudbury multiring impact structure. In: Dressler BO, Grieve RAF, Sharpton VL (eds) Large meteorite impacts and planetary evolution. Geol Soc Am Spec Pap 293:319–329Google Scholar
  11. Card KD (1978) Geology of the Sudbury-Manitoulin Area, District of Sudbury and Manitoulin. Ontario Geol Surv Rep 166:1–238Google Scholar
  12. Chai G, Eckstrand OR (1993) Origin of the Sudbury Igneous Complex, Ontario — differentiate of two separate magmas. Curr Res, part E, Geol Surv Can, Pap 93–1E: 219–230Google Scholar
  13. Chai G, Eckstrand OR (1994) Rare-earth element characteristics and origin of the Sudbury Igneous Complex, Ontario, Canada. Chem Geol 113:221–244Google Scholar
  14. Chai G, Eckstrand R, Grégoire C (1993) Platinum group element concentrations in the Sudbury rocks, Ontario — an indicator of petrogenesis. Curr Res, part C, Geol Surv Can, Pap 93–1C: 287–293Google Scholar
  15. Cintala MJ, Grieve RAF (1994) The effects of differential scaling of impact melt and crater dimensions on lunar and terrestrial craters: some brief examples. In: Dressler BO, Grieve RAF, Sharpton VL (eds) Large meteorite impacts and planetary evolution. Geol Soc Am Spec Pap 293:51–59Google Scholar
  16. Clendenen W, Kligfield R, Hirt A, Lowrie W (1988) Strain studies of cleavage development in the Chelmsford Formation, Sudbury Basin, Ontario. Tectonophysics 145:191–211Google Scholar
  17. Collins WH (1934) The life-history of the Nickel Irruptive (1): Petrogenesis. Trans Royal Soc Can 28 (sect 4): 123–177Google Scholar
  18. Cowan EJ, Schwerdtner WM (1994) Fold origin of the Sudbury Basin. Ontario Geol Surv Spec Pap 5:45–55Google Scholar
  19. Deutsch A (1994) Isotope systematics support the impact origin of the Sudbury Structure (Ontario, Canada). In: Dressler BO, Grieve RAF, Sharpton VL (eds) Large meteorite impacts and planetary evolution. Geol Soc Am Spec Pap 293:289–302Google Scholar
  20. Deutsch A, Grieve RAF (1994) The Sudbury Structure: constraints on its genesis from Lithoprobe results. Geophys Res Lett 21:963–966Google Scholar
  21. Deutsch A, Lakomy R, Buhl D (1989) Strontium- and neodymium- isotopic characteristics of a heterolithic breccia in the basement of the Sudbury impact structure, Canada. Earth Planet Sci Lett 93:359–370Google Scholar
  22. Deutsch A, Brockmeyer P, Buhl D (1990) Sudbury again: new and old isotope data. Lunar Planet Sci XXI: 282–283Google Scholar
  23. Deutsch A, Buhl D, Langenhorst F (1992) On the significance of crater ages — new ages for Dellen (Sweden) and Araguainha (Brazil). Tectonophysics 216:205–218Google Scholar
  24. Dickin AP, Richardson JM, Crocket JH, McNutt RH, Peredery WV (1992) Osmium isotope evidence for a crustal origin of platinum group elements in the Sudbury nickel ore, Ontario, Canada. Geochim Cosmochim Acta 56:3531–3537Google Scholar
  25. Dietz RS (1964) Sudbury Structure as an Astrobleme. J Geol 72:412–434Google Scholar
  26. Dressler BO (1984a) General geology of the Sudbury area. In: Pye EG, Naldrett AJ, Giblin PE (eds) The geology and ore deposits of the Sudbury Structure. Ontario Geol Surv Spec Vol 1:57–82Google Scholar
  27. Dressler BO (1984b) The effects of the Sudbury event and the intrusion of the Sudbury Igneous Complex on the footwall rocks of the Sudbury Structure. In: Pye EG, Naldrett AJ, Giblin PE (eds) The geology and ore deposits of the Sudbury Structure. Ontario Geol Surv Spec Vol 1:97–136Google Scholar
  28. Dressler BO, Morrison GG, Peredery WV, Rao BV (1987) The Sudbury Structure, Ontario, Canada — a review. In: Pohl J (ed) Research in terrestrial impact structures. Vieweg, Braunschweig, pp 39–68Google Scholar
  29. Faggart BE, Basu AR, Tatsumoto M (1985) Origin of the Sudbury complex by meteoritic impact: neodymium isotopic evidence. Science 230:436–439Google Scholar
  30. Fleet ME, Barnett RL, Morris WA (1987) Prograde metamorphism of the Sudbury Igneous Complex. Can Mineral 25:499–514Google Scholar
  31. Floran RJ, Grieve RAF, Phinney WC, Warner JL, Simonds CH, Blanchard DP, Dence MR (1978) Manicouagan impact melt, Quebec, 1, stratigraphy, petrology, and chemistry. J Geophys Res 83:2737–2759Google Scholar
  32. Gibbins WA, McNutt RH (1975) Rubidium-Strontium mineral ages and polymetamorphism at Sudbury, Ontario. Can J Earth Sci 12:1990–2003Google Scholar
  33. Giblin PE (1984) History of exploration and development of geological studies and development of geological concepts. In: Pye EG, Naldrett AJ, Giblin PE (eds) The geology and ore deposits of the Sudbury Structure. Ontario Geol Surv Spec Vol 1:3–23Google Scholar
  34. Golightly JP (1994) The Sudbury Igneous Complex as an impact melt: evolution and ore genesis. In: Lightfoot PC, Naldrett AJ (eds) Proceedings Sudbury-Noril'sk Symposium. Ontario Geol Surv Spec Vol 5:105–118Google Scholar
  35. Goodwin AM (1979) Archean volcanic studies in the Timmins-Kirkland Lake-Noranda region of Ontario and Quebec. Geol Surv Can Bull 278:1–51Google Scholar
  36. Grant RW, Bite A (1984) Sudbury quartz diorite offset dikes. In: Pye EG, Naldrett AJ, Giblin PE (eds) The geology and ore deposits of the Sudbury Structure. Ontario Geol Surv Spec Vol 1:275–301Google Scholar
  37. Grieve RAF, Floran RJ (1978) Manicouagan impact melt, Quebec. 2. Chemical interrelations with basement and formational processes. J Geophys Res 83:2761–2771Google Scholar
  38. Grieve RAF, Masaitis VL (1984) The economic potential of terrestrial impact craters. Intern Geol Rev 36:105–151Google Scholar
  39. Grieve RAF, Cintala MJ (1992) An analysis of differential of melt-crater scaling and implications for the terrestrial impact record. Meteoritics 27:526–538Google Scholar
  40. Grieve RAF, Dence MR, Robertson PB (1977) Cratering Processes: as interpreted from the occurrence of impact melts. In: Roddy DJ, Pepin RO, Merrill RB (eds) Impact and explosion cratering. Pergamon Press, New York, pp 791–814Google Scholar
  41. Grieve RAF, Stöffler D, Deutsch A (1991) The Sudbury Structure: controversial or misunderstood? J Geophys Res 96:22753–22764Google Scholar
  42. Gupta VK, Grant FS, Card KD (1984) Gravity and magnetic characteristics of the Sudbury Structure. In: Pye EG, Naldrett AJ, Giblin PE (eds) The geology and ore deposits of the Sudbury Structure. Ontario Geol Surv Spec Vol 1:381–410Google Scholar
  43. Hirt AM, Lowrie W, Clendenen WS, Kligfield R (1993) Correlation of strain and the anisotropy of magnetic susceptibility in the Onaping Formation: evidence for a near-circular origin of the Sudbury basin. Tectonophysics 225:231–254Google Scholar
  44. Jago BC, Morrison GG, Little TL (1994) Metal zonation patterns and microtextural and micromineralogical evidence for alkaliand halogen-rich fluids in the genesis of the Victor Deep and McCreedy East Footwall copper ore bodies, Sudbury Igneous Complex. In: Lightfoot PC, Naldrett AJ (eds) Proceedings Sudbury-Noril'sk Symposium. Ontario Geol Surv Spec Vol 5:65–76Google Scholar
  45. Jahn BM, Floran RJ, Simonds CH (1978) Rb-Sr isochron age of the Manicouagan melt sheet, Quebec, Canada. J Geophys Res 83:2799–2803Google Scholar
  46. Krogh TE, Davis DW, Corfu F (1984) Precise U-Pb zircon and baddeleyite ages for the Sudbury area. In: Pye EG, Naldrett AJ, Giblin PE (eds) The geology and ore deposits of the Sudbury Structure. Ontario Geol Surv Spec Vol 1:431–446Google Scholar
  47. Kuo HY, Crocker JH (1979) Rare earth elements in the Sudbury Nickel Irruptive: comparison with layered gabbros and implications for Nickel Irruptive petrogenesis. Econ Geol 79:590–605Google Scholar
  48. Lakomy R (1990) Implications for cratering mechanics from a study of the footwall breccia of the Sudbury impact structure, Canada. Meteoritics 25:195–207Google Scholar
  49. Lightfoot PC, Naldrett AJ (eds) (1994) Proceedings Sudbury-Noril'sk Symposium. Ontario Geol Surv Spec Vol 5:1–423Google Scholar
  50. Lowman PD Jr (1992) The Sudbury Structure as a terrestrial mare basin. Rev Geophys 30:227–243Google Scholar
  51. Martini JEJ (1991) The nature, distribution and genesis of the coesite and stishovite associated with the pseudotachylite of the Vredefort Dome, South Africa. Earth Planet Sci Lett 103:285–300Google Scholar
  52. Masaitis VL (1993) Origin of the Sudbury Structure from the points of new petrographic, mineralogical and geochemical data (in Russian). Trans All-Russian Mineral Soc 122:1–17Google Scholar
  53. Masaitis VL (1994) Impactites from Popigai Crater. In: Dressler BO, Grieve RAF, Sharpton VL (eds) Large meteorite impacts and planetary evolution. Geol Soc Am Spec Pap 293:153–162Google Scholar
  54. Masaitis VL, Danilin AI, Mashchak MS, Raikhlin AI, Selivanovskaya TV, Shadenkov EM (1980) The geology of astroblemes. “Nedra” Press Leningrad (St. Petersburg), Russia (in Russian): 231 ppGoogle Scholar
  55. McGrath PH, Broome HJ (1994) A gravity model for the Sudbury Structure along the Lithoprobe seismic line. Geophys Res Lett 21:955–958Google Scholar
  56. Melosh HJ (1989) Impact cratering — a geologic process. Oxford University Press, New York: 245 ppGoogle Scholar
  57. Milkereit B, Green A, Better E, Boerner D, Broome J, Cosec M, Cowan J, Davidson A, Dressler B, Fueten F, Grieve R, James R, Kraus B, McGrath P, Meyer W, Moon W, Morris W, Morrison G, Naldrett A, Peredery W, Rousell D, Salisbury M, Schwerdtner W, Snajdr P, Thomas M, Watts A (1992) Geometry of the Sudbury Structure from high-resolution seismic reflection profiling. Geology 20:807–811Google Scholar
  58. Morris WQA (1994) Is the Sudbury Igneous Complex a single melt sheet produced by a meteorite impact? Paleomagnetic and geochemical evidence for genesis by multiple phases. Geol Assoc Can-Mineral Assoc Can Meeting Waterloo 1994 (abstract), vol 19Google Scholar
  59. Morrison GG, Jago BC, White TL (1994) Footwall mineralization of the Sudbury Igneous Complex. In: Lightfoot PC, Naldrett AJ (eds) Proceedings Sudbury-Noril'sk Symposium. Ontario Geol Surv Spec Vol 5:57–64Google Scholar
  60. Müller-Mohr V (1992a) Gangbreccien der Sudbury-Struktur; Geologie, Petrographie and Geochemie der Sudbury-Breccie, Ontario, Kanada. PhD thesis mat-nat Fak (FB Geowiss) Universität Münster, pp 1–139Google Scholar
  61. Müller-Mohr V (1992b) Breccias in the basement of a deeply eroded impact structure, Sudbury, Canada. Tectonophysics 216:219–226Google Scholar
  62. Muir TL, Peredery WV (1984) The Onaping Formation. In: Pye EG, Naldrett AJ, Giblin PE (eds) The geology and ore deposits of the Sudbury Structure. Ontario Geol Surv Spec Vol 1:139–210Google Scholar
  63. Naldrett AJ (1984) Summary, discussion, and synthesis. In: Pye EG, Naldrett AJ, Giblin PE (eds) The geology and ore deposits of the Sudbury Structure. Ontario Geol Surv Spec Vol 1:533–569Google Scholar
  64. Naldrett AJ, Hewins RH (1984) The main mass of the Sudbury Igneous Complex. In: Pye EG, Naldrett AJ, Giblin PE (eds) The geology and ore deposits of the Sudbury Structure. Ontario Geol Surv Spec Vol 1:235–251Google Scholar
  65. Naldrett AJ, Hewins RH, Dressler BO, Rao BV (1984) The Contact Sublayer of the Sudbury Igneous Complex. In: Pye EG, Naldrett AJ, Giblin PE (eds) The geology and ore deposits of the Sudbury Structure. Ontario Geol Surv Spec Vol 1:253–274Google Scholar
  66. Naldrett AJ, Rao BV, Evensen NM (1986) Contamination at Sudbury and its role in ore formation. In: Metallogeny of basic and ultrabasic rocks. Institute of Mining and Metallurgy, London, pp 75–91Google Scholar
  67. Norman MD (1994) Sudbury Igneous Complex: impact melt or endogenous magma? Implications for lunar crustal evolution. In: Dressler BO, Grieve RAF, Sharpton VL (eds) Large meteorite impacts and planetary evolution. Geol Soc Am Spec Pap 293:331–341Google Scholar
  68. Ostermann M, Scharer U, Buhl D, Deutsch A (1994a) U-Pb-data for baddeleyite and zircon from the Foy Offset Dike (Sudbury, Canada). Mineral Mag 58a: 678–679Google Scholar
  69. Ostermann M, Scharer U, Deutsch A (1994b) Constraints on the origin of the Offset Dikes (Sudbury impact structure, Canada) from U-Pb data. Lunar Planet Sci XXV: 1031–1032Google Scholar
  70. Ostermann M, Deutsch A, Agrinier P (1995) Geochemical variation in the Foy Offset Dike, Sudbury impact structure. Ann Geophys 13 (Suppl III): C 741Google Scholar
  71. Pattison EF (1979) The Sudbury Sublayer. Can Mineral 17:257–274Google Scholar
  72. Peredery WV, Morrison GG (1984) Discussion of the origin of the Sudbury Structure. In: Pye EG, Naldrett AJ, Giblin PE (eds) The geology and ore deposits of the Sudbury Structure. Ontario Geol Surv Spec Vol 1:491–511Google Scholar
  73. Pye EG, Naldrett AJ, Giblin PE (eds) (1984) The geology and ore deposits of the Sudbury Structure. Ontario Geol Surv Spec Vol 1:1–603Google Scholar
  74. Rao BV, Naldrett AJ, Evensen NM (1984) Grant 146 crustal contamination in the Sublayer, Sudbury Igneous Complex: a combined trace element and strontium isotope study. Ontario Geol Surv Misc Pap 121:128–146Google Scholar
  75. Roest WR, Pilkington M (1994) Restoring post-impact deformation at Sudbury: a circular argument. Geophys Res Lett 21:959–962Google Scholar
  76. Rousell DH (1984) Onwatin and Chelmsford formations. In: Pye EG, Naldrett AJ, Giblin PE (eds) The geology and ore deposits of the Sudbury Structure. Ontario Geol Surv Spec Vol 1:211–218Google Scholar
  77. Schultz RH, Merrill RB (eds) (1981) Proceedings of the Conference on Multi-Ring Basins: formation and evolution. Pergamon Press, New York, pp 1–295Google Scholar
  78. Scribbins BT, Rae DR, Naldrett AJ (1984) Mafic and ultramafic inclusions in the Sublayer of the Sudbury Igneous Complex. Can Mineral 22:67–75Google Scholar
  79. Shanks WS, Schwerdtner WM (1991a) Structural analysis of the central and southwestern Sudbury structure, Southern province, Canadian shield. Can J Earth Sci 28:411–430Google Scholar
  80. Shanks WS, Schwerdtner WM (1991b) Crude quantitative estimates of the original northwest-southeast dimension of the Sudbury structure, south central Canadian shield. Can J Earth Sci 28:1677–1686Google Scholar
  81. Sharpton VL, Burke K, Camargo-Zanoguera A, Halls SA, Lee S, Marfn LE, Suárez-Reynoso G, Quezada-Muñeton JM, Spudis PD, Urrutia-Fucugauchi J (1993) Chicxulub multiring impact basin: size and other characteristics derived from gravity analysis. Science 261:1564–1567Google Scholar
  82. Shaw DM, Dostal J, Keays RR (1976) Additional estimates of continental surface Precambrian shield composition in Canada. Geochim Cosmochim Acta 40:73–83Google Scholar
  83. Simonds CH, Kieffer SW (1993) Impact and volcanism: a momentum scaling law for erosion. J Geophys Res 98, B8 (14): 321, 337Google Scholar
  84. Spray JG, Thompson LM (1995) Friction melt distribution in a multi-ring impact basin. Nature 373:130–132Google Scholar
  85. Stöffler D, Bischoff L, Oskierski W, Wiest B (1988) Structural deformation, breccia formation, and shock metamorphism in the basement of complex terrestrial impact craters: implications for the cratering process. In: Boden A, Erikson KG (eds) Deep drilling in crystalline bedrock, vol 1. Springer, Berlin Heidelberg New York, pp 277–297Google Scholar
  86. Stöffler D, Avermann M, Bischoff L, Brockmeyer P, Deutsch A, Dressler B, Lakomy R, Müller-Mohr V (1989) Sudbury, Canada: remnant of the only multi-ring (?) impact basin on Earth. Meteoritics 24:328Google Scholar
  87. Stöffler D, Deutsch A, Avermann M, Bischoff L, Brockmeyer P, Buhl D, Lakomy R, Muller-Mohr V (1994) The formation of the Sudbury, Canada: toward a unified impact model. In: Dressler BO, Grieve RAF, Sharpton VL (eds) Large meteorite impacts and planetary evolution. Geol Soc Am Spec Pap 293:303–318Google Scholar
  88. Therriault AM, Reid AM, Reimold WU (1993) Original size of the Vredefort Structure, South Africa. Lunar Planet Sci XXIV: 1419–1420Google Scholar
  89. Thompson LM, Spray JG (1994) Pseudotachylytic rock distribution and genesis within the Sudbury impact structure. In: Dressler BO, Grieve RAF, Sharpton VL (eds) Large meteorite impacts and planetary evolution. Geol Soc Am Spec Pap 293:275–287Google Scholar
  90. Thompson LM, Spray JG, Kelley SP (1994) Dating of pseudotachylytic rocks from the Sudbury impact structure via laser probe 40Ar-39Ar technique: evidence for a 1.86 Ga formation event and post-impact thermal overprinting. Geol Assoc Can Mineral Assoc Can Meeting Waterloo 1994 (abstract), Vol 19Google Scholar
  91. Walker RJ, Morgan JW, Naldrett AJ, Li C, Fassett JD (1991) Re-Os isotope systematics of Ni-Cu sulfide ores, Sudbury Igneous Complex, Ontario: evidence for a major crustal component. Earth Planet Sci Lett 105:416–429Google Scholar
  92. Walker RJ, Morgan JW, Hanski E, Smolkin VF (1994) The role of Re-Os isotope systems in deciphering the origin of magmatic sulphide ores. A tale of three ores. In: Lightfoot PC, Naldrett AJ (eds) Proceedings Sudbury-Noril'sk Symposium. Ontario Geol Surv Spec Vol 5:357–372Google Scholar
  93. Wichman RW, Schultz PH (1993) Floor-fractured crater models of the Sudbury Structure, Canada: implications for initial crater size and crater modification. Meteoritics 28:222–231Google Scholar
  94. Wu J, Milkereit B, Boerner D (1994) Timing constraints on deformation history of the Sudbury impact structure. Can J Earth Sci 31:1654–1660Google Scholar

Copyright information

© Springer-Verlag 1995

Authors and Affiliations

  • A. Deutsch
    • 2
  • R. A. F. Grieve
    • 1
    • 2
  • M. Avermann
    • 1
    • 3
  • L. Bischoff
    • 3
  • P. Brockmeyer
    • 1
    • 3
  • D. Buhl
    • 4
  • R. Lakomy
    • 1
    • 3
  • V. Müller-Mohr
    • 1
    • 3
  • M. Ostermann
    • 1
  • D. Stöffler
    • 1
  1. 1.Institut für PlanetologieUniversität MunsterMünsterGermany
  2. 2.Geological Survey of CanadaOttawaCanada
  3. 3.Geologisch-Paläontologisches InstitutUniversität MünsterMünsterGermany
  4. 4.Institut für GeologieUniversität BochumBochumGermany

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