U.S. Science Support Program Office associated with the International Ocean Discovery Program (USSSP:IODP) (Gabriella D. Kitch) Carbonate chemistry and carbon cycling during the Paleogene

Project: Research project

Project Details

Description

The carbonate-rich Site U1553 presents an opportunity to constrain seawater carbonate
chemistry during the Paleogene using a multi-proxy approach. In the Jacobson Laboratory at
Northwestern University (NU), I have been trained in the analysis and interpretation of
traditional and non-traditional isotope systems, including stable calcium (δ44/40Ca), as well as
radiogenic and stable strontium (87Sr/86Sr and δ88/86Sr). Prof. Andrew Jacobson will serve as my Northwestern faculty PI for this proposal. During the 15-month post-cruise research period, I
propose to analyze the Ca and Sr isotope composition of bulk carbonate and calcareous
microfossils recovered from Site U1553. Application of the δ44/40Ca, 87Sr/86Sr, and δ88/86Sr
tracers to the recovered samples can help elucidate the causes and consequences of extreme
climate change during the Paleogene, such as the Paleocene-Eocene Thermal Maximum (PETM)
ocean acidification (OA) event. The Ca and Sr isotopic systems are also sensitive to diagenetic
alteration in unique ways that can be carefully exploited to assess preservation of primary and
secondary signals.
StatusActive
Effective start/end date12/1/2011/30/21

Funding

  • Columbia University (71C(GG009393-04)//OCE-1450528)
  • National Science Foundation (71C(GG009393-04)//OCE-1450528)

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