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Large Meteorite Impacts and Planetary Evolution NASA-CR-190677 19930000924 LIBRARY COpy SEP I 6 1992 lANGLEY RESEARCH CENTER UBRARYNASA HAMPTON VIRGINIA LARGE METEORITE IMPACTS AND PLANETARY EVOLUTION Sudbury, Ontario, Canada August 31-September 2, 1992 Dl" l.DI.'.; DISPLAY 03/2/1 93N10112*# ISSUE 1 PAGE 105 CATEGORY 46 RPT#: NASA-CR-190677 NAS 1.26:190677 LPI-CONTRIB-790 CNT#: NASW-4574 92/00/00 93 PAGES UNCLASSIFIED DOCUMENT UTTL: International Conference on Large Meteorite Impacts and Planetary Evolution CORP: Lunar and Planetary Inst., Houston, TX. CSS: (Publications Services Dept. ) SAP: Avail: CASI HC A05/MF AOl . CIO: UNITED STATES Conference held in SUdb~ry, Ontario, 31 Aug. - 2 Sep. 1992; sponsored by Barringer Crater Co., Falconbridge Ltd., Geological Survey of Canada, Inco Ltd., International Union of Geological Sciences, Laurentian Univ., LPI, and Ontario Ministry of Northern Development and Mines MAJS: /*CANADA/*CONFERENCES/*HYPERVELOCITY IMPACT/*METEORITE COLLISIONS/* METEORITE CRATERS/*PLANETARY EVOLUTION MINS: / BRECCIA/ CANADIAN SHIELD/ GEOMORPHOLOGY/ ROCK INTRUSIONS/ STRUCTURAL PROPERTIES (GEOLOGY) ANN: The papers that were accepted for the International Conference on Large Meteorite Impacts and Planetary Evolution, 31 Aug. - 2 Sep. 1992, are presented. One of the major paper topics was the Sudbury project. For individual titles, see N93-l0ll3 through N93-l0l96. • PAPERS PRESENTED TO THE INTERNATIONAL CONFERENCE ON LARGE METEORITE IMPACTS AND PLANETARY EVOLUTION August 31-September 2, 1992 Sudbury, Ontario, Canada Sponsored by Barringer Crater Company Falconbridge Limited Geological Survey of Canada Inco Limited International Union ofGeological Sciences Laurentian University, Sudbury Lunar and Planetary Institute, Houston Ontario Ministry ofNorthern Development and Mines LPI Contribution No. 790 .. Compiled in 1992 by Lunar and Planetary Institute 3600 Bay Area Boulevard Houston TX 77058-1113 Material in this volume may be copied without restraint for library, abstract service, education, or personal research purposes; however, republication ofany paper or portion thereofrequires the written permission ofthe authors as well as the appropriate acknowledgment of this publication. TheLunarandPlanetary Institute is operated by the Universities Space Research Association under ContractNo. NASW-4574 with the National Aeronautics and Space Administration. ,. PREFACE This volume contains papers that have been accepted for the International Conference on Large Meteorite Impacts and Planetary Evolution, August 31-5eptember 2, 1992, in Sudbury, Ontario, Canada. The Scientific Organizing Committee consisted ofB. Dressler and V. L. Sharpton, co-chairmen, and B. M. French, R. A. F. Grieve, and E. M. Shoemaker. Members ofthe Local Organizing Committee were H. Gibson (Chairman), S. Ball, C. J. A. Coats, B. Dressler, G. W. Johns (Treasurer), W. Meyer, W. V. Peredery, and D. H. Rousell. Administrative support was provided by the Program Services Department staff at the Lunar and Planetary Institute. This abstract volume was prepared by the Publications Services Department staff at the Lunar and Planetary Institute. , Ne,3-JOI/~* TABLE OF CONTENTS Carbon and Oxygen Isotope Study 0/Carbonates from Highly Shocked Clasts o/the Polymict Breccia o/the Haughton Crater (Canada) P. Agrinier. I. Martinez. M. Javoy. and U. Scharer...............................................•...................•... 1 Research Core Drilling in the Manson Impact Structure, Iowa R. R. Anderson. J. B. Hartung. D. J. Roddy. and E. M. Shoemaker 2 A Quasi-Hertzian Stress Fieldfrom an Internal Source: A Possible Working Model for the Vrede/ort Structure L. A. G. Antoine. W. U. Reimold. and W. P. Colliston 3 Sudbury Projec{(University o/Munster-Ontario Geological Survey): (6) Origin o/the Polymict, Allochthonous Breccias o/the Onaping Formation M. E. Avennann 4 Sudbury Project (University o/Munster-Ontario Geological Survey): (1) Summary 0/Results-An Updated Impact Model M. Avermann. L. Bischoff. P. Brockmeyer. D. Buhl, A. Deutsch. B. O. Dressler. R. Lakomy. V. Muller-Mohr. and D. StOffler 5 Structural Aspects o/the Araguainha Impact Structure (Brazil) L. Bischoff. P. Brockmeyer, U. Jenchen, and R.-M. Swietlik 6 Sudbury Project (University 0/Munster-Ontario Geological Survey): (2) Field Studies 1984-1989-Summary o/Results L. Bischoff, B. O. Dressler, M. E. Avermann, P. Brockmeyer, R. Lakomy. and V. Muller-Mohr 7 Large Meteorite Impacts: The KIT Model B. F. Bohor 8 Shocked Zircons in the Onaping Formation: Further Proof0/Impact Origin B. F. Bohor and W. J. Betterton 9 Suevite Superposition on the Bunte Breccia in Nordlinger RieslGermany: New Findings on the Transpon Mechanism o/Impactites D. Bringemeier 10 Sudbury Project (University o/Munster-Ontario Geological Survey): (7) Sr-Nd in Heterolithic Breccias and Gabbroic Dikes D. Buhl. A. Deutsch, R. Lakomy, P. Brockmeyer, and B. Dressler 11 Hong Kong is an Impact Crater: Proo/from the Geomorphological and Geological Evidence C.-I. Chan, S. Wu. and X. Luo 12 .. v Melt Production in Large-Scale Impact Events: Calculations ofImpact-Melt Volumes and Crater Scaling . M. J. Cintala and R. A. F. Grieve ~ 13 Melt Production in Large-Scale Impact Events: Planetary Observations and Implications M. J. Cintala and R. A~ F. Grieve 14 Structural Review ofthe Vredefort Dome W. P. Colliston and W. U. Reimold 16 Intrusive Origin ofthe Sudbury Igneous Complex: Structural and Sedimentological Evidence E. J. Cowan and W. M. Schwerdtner 17 Enhanced Magnetic Field Production During Oblique Hypervelocity Impacts D. A. Oawford and P. H. Schultz 18 Impactite and Pseudotachylite from Roter Kamm Crater, Namibia J. I. Degenhardt Ir., P. C. Buchanan, and A. M. Reid 20 Sudbury Project (University ofMUnster-Ontario Geological Survey): (4) Isotope Systematics Support the Impact Origin A. Deutsch, D. Buhl, P. Brockmeyer, R. Lakomy, and M. Flucks 21 Noril'sklSiberian Plateau Basalts and Bahama Hot Spot: Impact Triggered? R. S. Dietz and J. F. McHone 22 Mobilization oftile Platinum Group Elements by Low-Temperature Fluids: Implications for Mineralization and the Iridium Controversy K. Dowling, R. R. Keays, M. W. Wallace, and V. A. Gostin 23 Does the Bushveld-Vredefort System (South Africa) Record the Largest Known Terrestrial Impact Catastrophe? W. E. Elston 23 Ruthenium/Iridium Ratios in the Cretaceous-Tertiary Boundary Clay: Implications for Global Dispersal and Fractionation Within the Ejecta Cloud N. J. Evans, W. D. Goodfellow, D. C. Gregoire, and J. Veizer 25 Diaplectic Transformation ofMinerals: Vorotilov Drill Core, Puchezh-Katunki Impact Crater, Russia V. I. Feldman 25 Breccia Dikes from the Beaverhead Impact Structure, Southwest Montana P. S. Fiske, S. B. Hougen, and R. B. Hargraves 26 vi New Perspectives on the Popigai Impact Structure J. B. Garvin and A. L. Deino....................................•............•..........••.......•...........•.................... 27 The Zhamanshin Impact Feature: A New Class ofComplex Crater? J. B. Garvin and C. C. Schnetzler .............................•...............................................................•. 28 Asteroids and Archaean Crustal Evolution: Tests ofPossible Genetic Links Between Major Mantle/Crust Melting Events and Clustered Extraterrestrial Bombardments A. Y. Glikson 29 The Acraman Impact and Its Widespread Ejecta, South Australia v. A. Gostin, R. R. Keays, and M. W. Wallace 30 Optical and TEM Study ofShock Metamorphismjrom the Sedan Test Site A. J. Gratz 31 Simulated Meteorite Impacts and Volcanic Explosions: Ejecta Analyses and Planetary Implications A. J. Gratz and W. J. Nellis 31 Melt Production in Large-Scale Impact Events: Implications and Observations at Terrestrial Craters R. A. F. Grieve and M. 1. Cintala 32 Venusian Impact Basins and Cratered Terrains w. B. Hamilton 33 Where's the Beaverhead Beef! R. B. HargJ'aves 35 Report on the International Cambodian Crater Expedition-1992 J. Hartung, C. Koeberl, P. Lee, K. Pagnacith, and T. Sambath 36 The Distribution and Modes ofOccurrence ofImpact Melt atLunar Craters B. R. Hawke and J. W. Head 37 Large Impacts in the Baltic Shield with Special Attention to the Uppland Structure H. Henkel and R. Lilljequist 38 The Panther Mountain Circular Structure, A Possible Buried Meteorite Crater Y. W. Isachsen, S. F. Wright, F. A. Revetta, and R. J. Dineen 40 Geomechanical Models ofImpact Cratering: Puchezh-Katunki Structure B. A. Ivanov .............................................................................................................................•40 vii Thermobarometric Studies on the Levack Gneisses-Footwall Rocks • to the Sudbury Igneous Complex R. S. James, W. Peredery, andJ. M. Sweeny ~ 41 The Cretaceous-Tertiary (KIT) Impact: One or More SoW'ce Craters? C. K<>e1>erl ••••• "' •.••.••••••...•••••••.•••..••••••.•••..••.••••••.•..•.••••••••..••..•••••••••.••.••••.•...•....•.•••••...••••••.......•...• 41 Tektite Origin by Hypervelocity Asteroidal or Cometary Impact: The Questfor the SoW'ce Craters c. Koeberl "' : 42 Early Archean Spherule Beds ofPossible Impact Originfrom Barberton, South Africa: A Detailed Mineralogical and Geochemical Study C. Kreher}, W. U. Reimold, and R. H. Boor 11 ••• 44- U-Pb Isotopic Results for Single Shocked and Polycrystalline Zircons Record 55D-65.5-MaAgesfor a K-TTarget Site and 2700-1850-MaAges for the Sudbury Impact Event T. E. Krogh, S. L. Kamo, and B. F. Bohor ...........................................................................•..... 44- Influence ofthe Preshock TemperatW'e on Shock Effects in Quartz F. :Langenhorst and A.
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