Identification of late Eocene impact deposits at ODP Site 1090

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doi: 10.2973/odp.proc.sr.177.110.2001
Author(s): Kyte, Frank T.
Ocean Drilling Program, Leg 177, Shipboard Scientific Party, College Station, TX
Author Affiliation(s): Primary:
University of California at Los Angeles, Center for Astrobiology, Los Angeles, CA, United States
Other:
University of Florida, United States
Ocean Drilling Program, United States
University of Bergen, Norway
University of Durham, United Kingdom
University of California at Santa Cruz, United States
Scripps Institution of Oceanography, United States
Indiana University at Purdue, United States
Universidad de Salamanca, Spain
University of New Brunswick, Canada
University of Tasmania, Australia
Hokkaido University, Japan
Florida State University, United States
University of Southampton, United Kingdom
Georgia Institute of Technology, United States
Universita di Bari, Italy
Wesleyan University, United States
Lamont-Doherty Earth Observatory, United States
Nagoya University, Japan
California State University, United States
Volume Title: Proceedings of the Ocean Drilling Program, scientific results; Southern Ocean paleoceanography; covering Leg 177 of the cruises of the drilling vessel JOIDES Resolution; Cape Town, South Africa, to Punta Arenas, Chile; sites 1088-1094; 9 December 1997-5 February 1998
Volume Author(s): Gersonde, Rainer; Hodell, David A.; Blum, Peter; Andersson, Carin; Austin, William E. N.; Billups, Katharina; Channell, James E. T.; Charles, Christopher D.; Diekmann, Bernhard; Filippelli, Gabriel M.; Flores, José-Abel; Hewitt, Antony T.; Howard, William R.; Ikehara, Minoru; Janecek, Thomas R.; Kanfoush, Sharon L.; Kemp, Alan E. S.; King, Stagg L.; Kleiven, Helga Flesche; Kuhn, Gerhard; Marino, Maria; Ninnemann, Ulysses S.; O'Connell, Suzanne; Ortiz, Joseph D.; Stoner, Joseph S.; Sugiyama, Kazuhiro; Warnke, Detlef A.; Zielinski, Ulrich
Source: Proceedings of the Ocean Drilling Program, scientific results; Southern Ocean paleoceanography; covering Leg 177 of the cruises of the drilling vessel JOIDES Resolution; Cape Town, South Africa, to Punta Arenas, Chile; sites 1088-1094; 9 December 1997-5 February 1998, Rainer Gersonde, David A. Hodell, Peter Blum, Carin Andersson, William E. N. Austin, Katharina Billups, James E. T. Channell, Christopher D. Charles, Bernhard Diekmann, Gabriel M. Filippelli, José-Abel Flores, Antony T. Hewitt, William R. Howard, Minoru Ikehara, Thomas R. Janecek, Sharon L. Kanfoush, Alan E. S. Kemp, Stagg L. King, Helga Flesche Kleiven, Gerhard Kuhn, Maria Marino, Ulysses S. Ninnemann, Suzanne O'Connell, Joseph D. Ortiz, Joseph S. Stoner, Kazuhiro Sugiyama, Detlef A. Warnke and Ulrich Zielinski; Ocean Drilling Program, Leg 177, Shipboard Scientific Party, College Station, TX. Proceedings of the Ocean Drilling Program, Scientific Results (CD ROM), Vol.177, 9p. Publisher: Texas A&M University, Ocean Drilling Program, College Station, TX, United States. ISSN: 1096-2514
Note: In English. Available only on CD-ROM in PDF format and on the Web in PDF or HTML. 23 refs.CD-ROM format, ISSN 1096-2514; WWW format, ISSN 1096-7451; illus., incl. 2 tables
Summary: Anomalous concentrations of Ir have been found in upper Eocene sediments from Ocean Drilling Program (ODP) Hole 1090B. Clear and dark-colored spherules that are believed to be microtektites and clinopyroxene-bearing microkrystites, respectively, were found in the samples with highest Ir. The peak Ir concentration in Sample 177-1090B-30X-5, 105-106 cm (954 pg/g) and the net Ir fluence (14 ng/cm2) at this site are higher that at most other localities except for Caribbean site RC9-58. The Ir anomaly and impact debris are probably correlative with similar deposits found at ODP Site 689 on the Maude Rise and at other localities around the world.
Year of Publication: 2003
Research Program: ODP Ocean Drilling Program
Key Words: 12 Stratigraphy, Historical Geology and Paleoecology; Cenozoic; Concentration; Cores; Correlation; Eocene; Geochemical anomalies; Geochemistry; Identification; Impacts; Iridium; Leg 177; Lithostratigraphy; Metals; Mineral composition; ODP Site 1090; Ocean Drilling Program; Paleogene; Platinum group; Southern Ocean; Spherules; Tektites; Tertiary; Upper Eocene
Coordinates: S425449 S425449 E0085359 E0085359
Record ID: 2003053332
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