Impact-related Ir anomaly in the Middle Ordovician Lockne impact structure, Jämtland, Sweden

References

• Alvarez , L.W. , Alvarez , W. , Asaro , F. and Michel , H.V. 1980 . Extraterrestrial cause for the Cretaceous/Tertiary extinction . Science , 208 : 1095 – 1108 .
   PubMed Web of Science ®Google Scholar
• Goldschmidt , V.M. 1954 . Geochemistry , 730 Oxford University Press .
   Google Scholar
• Greenland , L.P. 1971 . Variation of iridium in a differentiated tholeiitic dolerite . Geochi-mica et Cosmochimica Acta , 35 : 319 – 322 .
   Web of Science ®Google Scholar
• Greenland , L.P. , Gottfried , D. and Tilling , R.I. 1974 . Iridium in some calcic and calc-alkalic batholithic rocks of the western United States . Chemical Geology , 14 : 117 – 122 .
   Web of Science ®Google Scholar
• Hildebrand , A.R. , Penfield , G.T. , Kring , D.A. , Pilkington , M. , Camargo , A. , Jacobsen , S.B. and Boynton , W.V. 1991 . Chicxulube crater: A possible Cretaceous/Tertiary boundary impact crater on the Yucatán Peninsula, Mexico . Geology , 19 : 867 – 871 .
   Web of Science ®Google Scholar
• Huff , W.D. , Bergström , S.M. and Kolata , D.R. 1992 . Gigantic Ordovician volcanic ash fall in the North America and Europe: Biological, tectonomagmatic, and event-stratigraphic significance . Geology , 20 : 875 – 878 .
   Web of Science ®Google Scholar
• Lindström , M. , Sturkell , E.F.F. , Törnberg , R. and Ormö , J. 1996 . The marine impact crater at Lockne, central Sweden . GFF , 118 : 193 – 206 .
   Web of Science ®Google Scholar
• Orth , C.J. , Attrep , M. Jr. and Quintana , L.R. 1990 . Iridium abundance patterns across bio-event horizons in the fossil record . Geological Society of America Special Paper , 247 : 45 – 59 .
   Google Scholar
• Perlman , I. and Asaro , F. 1969 . Pottery analysis by neutron activation . Archaeometry , 11 : 21 – 52 .
   Web of Science ®Google Scholar
• Schmidt , G. , Palme , H. and Krarz , K-.L. 1997 . Highly siderophile elements (Re, Os, Ir, Ru, Rh, Pd, Au) in impact melts from three European impact craters (Sääksjätvi, Mien, and Dellen): Clues to the nature of impacting bodies . Geochimica et Cosmo-chimica Acta , 61 : 2977 – 2987 .
   Web of Science ®Google Scholar
• Schmitz , B. 1992 . Chalcophile elements and Ir in continental Cretaceous-Tertiary boundary clays from the western interior of the USA . Geochimica et Cosmochimica Acta , 56 : 1695 – 1703 .
   Web of Science ®Google Scholar
• Schmitz , B. and Asaro , F. 1996 . Iridium geochemistry of volcanic ash layers from the Eocene rifting of the northeastern North Atlantic and some other Phanerozoic events . Geological Society of America Bulletin , 108 : 489 – 504 .
   Web of Science ®Google Scholar
• Schmitz , B. , Lindström , M. , Asaro , F. and Tassinari , M. 1996 . Geochemistry of meteorite-rich marine limestone strata and fossil meteorites from the lower Ordovician at Kinnekulle, Sweden . Earth and Planetary Science Letters , 145 : 31 – 48 .
   Web of Science ®Google Scholar
• Simon , S. 1987 . Stratigraphie, Petrographie und Entstehungsbedingungen von Grob-klastika in der autochthonen, ordovizischen Schichtenfolge Jämtlands (Schweden) . Sveriges Geologiska Undersökning C , 815 : 1 – 156 .
   Google Scholar
• Sturkell , E.F.F. and Lindström , M. 1996 . “ Mass balance of the Lockne impact structure, central Sweden ” . In GFF 118 Jubilee Issue A102 – A103 .
   Google Scholar
• Sturkell , E.F.F. , Broman , C. , Forsberg , P. and Torssander , T. 1998 . Impact-related hydrothermal activity in the Lockne impact structure, Jämtland, Sweden . European Journal of Mineralogy , 10 : 589 – 606 .
   Web of Science ®Google Scholar
• Stöffler , D. and Grieve , R.A.F. 1994 . “ Classification and nomenclature of impact metamorphic rocks: A proposal to the IUGS Subcommission on the systematics of metamorphic rocks ” . In Impact cratering and evolution of Planet Earth. Lockne -94. Second International Workshop. The Identification and Characterization of Impacts. Abstract Volume. Östersund May 31-June 5, 1994 , Edited by: Törnberg , R. European Science Foundation .
   Google Scholar
• Therriault , A.M. and Lindström , M. 1995 . Planar deformation features in quartz grains from the resurge deposit of the Lockne structure, Sweden . Meteoritics , 30 : 700 – 703 .
   Web of Science ®Google Scholar
• Wasson , J.T. 1974 . Meteorites classification and properties , 316 Springer-Verlag .
   Google Scholar
• Wedepohl , K. 1978 . Handbook of Geochemistry (Chs. on Pt metals and Au) , Springer-Verlag .
   Google Scholar
• Wedepohl , K.H. 1995 . The composition of the continental crust . Geochimica et Cosmo-chimica Acta , 59 : 1217 – 1232 .
   Web of Science ®Google Scholar