Bulk δ18O and δ13C records from Site 999, Colombian Basin, and Site 1000, Nicaraguan Rise (latest Oligocene to middle Miocene); diagenesis, link to sediment parameters, and paleoceanography

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doi: 10.2973/odp.proc.sr.165.016.2000
Author(s): Mutti, Maria
Author Affiliation(s): Primary:
University of Southern California, Department of Earth Sciences, Los Angeles, CA, United States
Other:
University of Rhode Island, United States
Ocean Drilling Program, United States
University of Puerto Rico, Puerto Rico
University of North Carolina at Chapel Hill, United States
Paleontological Research Institution, United States
Université de Lyon I, France
Rice University, United States
Université Pierre et Marie Curie, France
INGEOMINAS, Colombia
GEOMAR, Federal Republic of Germany
Teikoku Oil Company, Japan
Danmarks Tekniske Universitet, Denmark
Institut Mediterranéen de Technologie, France
University of Missouri, United States
Boston University, United States
Swiss Federal Institute of Technology, Switzerland
Lamont-Doherty Earth Observatory, United States
University of Southampton, United Kingdom
Durham University, United Kingdom
Rosenstiel School of Marine and Atmospheric Science, United States
Bremen University, Federal Republic of Germany
Volume Title: Proceedings of the Ocean Drilling Program, scientific results, Caribbean Ocean history and the Cretaceous/Tertiary boundary event; covering Leg 165 of the cruises of the drilling vessel JOIDES Resolution, Miami, Florida, to San Juan Puerto Rico, sites 998-1002, 19 December 1995-17 February 1996
Volume Author(s): Leckie, R. Mark; Sigurdsson, Haraldur; Acton, Gary D.; Abrams, Lewis J.; Bralower, Timothy J.; Carey, Steven N.; Chaisson, William P.; Cotillon, Pierre; Cunningham, Andrew D.; D'Hondt, Steven L.; Droxler, André W.; Galbrun, Bruno; Gonzalez, Juan; Haug, Gerald H.; Kameo, Koji; King, John W.; Lind, Ida L.; Louvel, Véronique; Lyons, Timothy W.; Murray, Richard W.; Mutti, Maria; Myers, Greg; Pearce, Richard B.; Pearson, D. Graham; Peterson, Larry C.; Röhl, Ursula; Garman, Phyllis
Source: Proceedings of the Ocean Drilling Program, scientific results, Caribbean Ocean history and the Cretaceous/Tertiary boundary event; covering Leg 165 of the cruises of the drilling vessel JOIDES Resolution, Miami, Florida, to San Juan Puerto Rico, sites 998-1002, 19 December 1995-17 February 1996, R. Mark Leckie, Haraldur Sigurdsson, Gary D. Acton, Lewis J. Abrams, Timothy J. Bralower, Steven N. Carey, William P. Chaisson, Pierre Cotillon, Andrew D. Cunningham, Steven L. D'Hondt, André W. Droxler, Bruno Galbrun, Juan Gonzalez, Gerald H. Haug, Koji Kameo, John W. King, Ida L. Lind, Véronique Louvel, Timothy W. Lyons, Richard W. Murray, Maria Mutti, Greg Myers, Richard B. Pearce, D. Graham Pearson, Larry C. Peterson, Ursula Röhl and Phyllis Garman. Proceedings of the Ocean Drilling Program, Scientific Results, Vol.165, p.275-283. Publisher: Texas A & M University, Ocean Drilling Program, College Station, TX, United States. ISSN: 0884-5891
Note: In English. 36 refs.CD-ROM format, ISSN 1096-2514; WWW format, ISSN 1096-7451; all chapters are also available on the included CD-ROM and on the Web in PDF format; illus., incl. 1 table, sketch map
Summary: Stable isotope records spanning from the latest Oligocene through the middle Miocene have been produced at Sites 999 and 1000 to address major changes in climate associated with the transition from relative global warmth of the late Oligocene-early Miocene to the Neogene "ice-house" world. The isotopic records of Sites 999 and 1000 clearly show the middle Miocene oxygen-isotope increase from ∼15.5 to 13 Ma, and all Miocene oxygen-isotope events "Mi" can be recognized. Additional δ18O increases occur at ∼24.5, ∼23, 20.5, and 17.8 Ma. In addition, the long-term δ18O increase between ∼15.5 and 13 Ma shows internal quasi-cyclic structures, reflecting a periodicity of ∼400 k.y., the orbital eccentricity, which is superimposed on the longer term cooling trend related to the major icesheet growth in Antarctica. The long-term trends in carbon isotopes are marked by two positive excursions: the δ13C increase near the Oligocene/Miocene boundary, from ∼24.5 to 23 Ma, and the Monterey Excursion between ∼17 and 13.5 Ma. The increase in δ13C at 17 Ma leads the first major cooling step in Antarctica by 1.5 m.y. However, within the Monterey Excursion several δ13C maxima occur with cyclic periods of ∼400 k.y. in parallel to climate excursions as indicated by oxygen isotopes. Long-term isotope shifts, coinciding with lithologic changes indicating the changes in sediment physical properties, are linked to changes in climate.
Year of Publication: 2000
Research Program: ODP Ocean Drilling Program
Key Words: 02 Geochemistry; 12 Stratigraphy, Historical Geology and Paleoecology; Atlantic Ocean; Biostratigraphy; C-13/C-12; Carbon; Caribbean Sea; Cenozoic; Chemostratigraphy; Climate change; Colombian Basin; Depositional environment; Diagenesis; Foraminifera; Geochemistry; Invertebrata; Isotope ratios; Isotopes; Leg 165; Lithostratigraphy; Magnetic susceptibility; Marine sediments; Microfossils; Middle Miocene; Miocene; Neogene; Nicaragua Rise; North Atlantic; O-18/O-16; ODP Site 1000; ODP Site 999; Ocean Drilling Program; Oligocene; Oxygen; Paleo-oceanography; Paleoclimatology; Paleogene; Paleomagnetism; Protista; Sediments; Stable isotopes; Tertiary; Upper Oligocene
Coordinates: N163313 N163313 W0795200 W0795200
N124437 N124437 W0784422 W0784422
Record ID: 2000062896
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