Bralower, Timothy J. et al. (2004): Strontium isotope stratigraphy of Cretaceous sediments at Sites 1183 and 1186, Ontong Java Plateau

Leg/Site/Hole:
ODP 192
ODP 192 1183
ODP 192 1186
Identifier:
2005-004700
georefid
10.2973/odp.proc.sr.192.106.2004
doi
Creator:
Bralower, Timothy J.
Pennsylvania State University, Department of Geosciences, University Park, PA, United States
author
Fullagar, Paul D.
University of Hawaii at Manoa, United States
author
McCay, Taylor A.
Ocean Drilling Program, United States
author
MacLeod, Kenneth G.
Ludwig-Maximilians-Universitaet Muenchen, Federal Republic of Germany
author
Bergen, James A.
University of Victoria, Canada
author
Zapata, Eglee
University of North Carolina, United States
author
Identification:
Strontium isotope stratigraphy of Cretaceous sediments at Sites 1183 and 1186, Ontong Java Plateau
2004
In: Fitton, J. Godfrey, Mahoney, John J., Wallace, Paul J., Antretter, Maria J., Banerjee, Neil R., Bergen, James A., Cairns, Graeme, Castillo, Paterno R., Chambers, Lynne M., Chazey, William J., III, Coffin, Millard F., Godard, Marguerite M., Hall, Stuart A., Honnorez, Jose, Ingle, Stephanie P., Kroenke, Loren W., MacLeod, Kenneth G., Naruse, Hajime, Neal, Clive R., Ogg, James G., Riisager, Peter, Sano, Takahashi, Sikora, Paul J., van der Werff, Wietze, White, Rosalind V., Zhao, Xixi, Proceedings of the Ocean Drilling Program; scientific results; basement drilling of the Ontong Java Plateau; covering Leg 192 of the cruises of the drilling vessel JOIDES Resolution; Apra Harbor, Guam, to Apra Harbor, Guam; Sites 1183-1187; 8 September-7 November 2000
Texas A&M University, Ocean Drilling Program, College Station, TX, United States
192
Strontium isotope stratigraphy of the Cretaceous sections recovered in Holes 1183A and 1186A generally matches trends expected from the seawater Sr isotope curve. Combined with biostratigraphic data, the (super 87) Sr/ (super 86) Sr measurements provide a good chronostratigraphic framework for these holes. In the mid-Cretaceous where the seawater Sr isotopic curve changes direction several times, biostratigraphy removes ambiguity in interpreting (super 87) Sr/ (super 86) Sr values. Furthermore, (super 87) Sr/ (super 86) Sr values refine the interpretation of several mid-Cretaceous unconformities suggested by nannofossil biostratigraphy. For the Campanian-Maastrichtian sediments in both holes, ages predicted from Sr isotope stratigraphy are as much as 2.5 m.y. younger than those from nannofossil stratigraphy. This offset likely results from differences in the way that ages are calibrated to nannofossil datums and the seawater Sr isotopic curve. Numerous Sr isotope values are high for their stratigraphic position, suggesting incorporation of excess 87Sr presumably derived from terrigenous clays. Other Sr isotope values suggest minor errors in the estimated ages of nannofossil datums.
English
Serial
Coverage:Geographic coordinates:
North:-0.4100
West:157.0100East: 159.5100
South:-1.1100
Stratigraphy; Isotope geochemistry; algae; alkaline earth metals; biostratigraphy; biozones; Campanian; chemostratigraphy; chronostratigraphy; cores; Cretaceous; geochemistry; isotope ratios; isotopes; Leg 192; Maestrichtian; Mesozoic; metals; microfossils; nannofossils; Ocean Drilling Program; ODP Site 1183; ODP Site 1186; Ontong Java Plateau; Pacific Ocean; paleo-oceanography; Plantae; sedimentary rocks; Senonian; Sr-87/Sr-86; stable isotopes; strontium; Upper Cretaceous; West Pacific;
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