Proc. IODP, 317, Data report: revised Pleistocene age model based on a modified nannofossil bioevent and additional measurements of benthic foraminiferal oxygen and stable carbon isotope ratios from Hole U1352B, offshore Canterbury Basin, New Zealand

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Chapter contents Abstract Introduction Materials and methods Results Nannofossil datum reexamination Impact of new isotopic measurements Correlation with the LR04 stack and revised age model Acknowledgments References Figures F1. Selected calcareous nannofossil species. F2. N. flemingi δ¹⁸O and δ¹³C ratios. F3. δ¹⁸O comparison. F4. δ¹³C comparison. F5. δ¹⁸O variations and LR04 stack. F6. Sedimentation rates. Tables T1. Calcareous nannofossils. T2. N. flemingi δ¹⁸O and δ¹³C ratios. T3. N. flemingi and U. perigrina δ¹⁸O and δ¹³C ratios. T4. Bioevents. PDF file			Previous \| Next doi:10.2204/iodp.proc.317.210.2018 Data report: revised Pleistocene age model based on a modified nannofossil bioevent and additional measurements of benthic foraminiferal oxygen and stable carbon isotope ratios from Hole U1352B, offshore Canterbury Basin, New Zealand¹ Koichi Hoyanagi,² Yuichiro Tanaka,³ Tokinori Takeuchi,² Minoru Ikehara,⁴ Masayuki Utsunomiya,³ Peter Blum,⁵ Cecilia M. McHugh,⁶ and Craig S. Fulthorpe⁷ Abstract Reexamination of a nannofossil datum, the highest occurrence of Pseudoemiliania lacunosa (Zone NN20/NN19; 0.44 Ma), has led to a revised datum depth in Integrated Ocean Drilling Program Expedition 317 Hole U1352B. Furthermore, comparison between isotopic ratios of benthic foraminifers Nanionella flemingi and Uvigerina perigrina indicate that oxygen and carbon isotopic ratios for both species, when they occur in the same horizon, are almost identical. Therefore, we can correlate the oxygen isotopic variations of N. flemingi with the LR04 stack. We have conducted additional measurements of oxygen and stable carbon isotope ratios of N. flemingi, which in conjunction with our revised nannofossil datum allows a new correlation with the LR04 stack and results in revision of our original age model. ¹ Hoyanagi, K., Tanaka, Y., Takeuchi, T., Ikehara, M., Utsunomiya, M., Blum, P., McHugh, C.M., and Fulthorpe, C.S., 2018. Data report: revised Pleistocene age model based on a modified nannofossil bioevent and additional measurements of benthic foraminiferal oxygen and stable carbon isotope ratios from Hole U1352B, offshore Canterbury Basin, New Zealand. In Fulthorpe, C.S., Hoyanagi, K., Blum, P., and the Expedition 317 Scientists, Proceedings of the Integrated Ocean Drilling Program, 317: Tokyo (Integrated Ocean Drilling Program Management International, Inc.). doi:10.2204/iodp.proc.317.210.2018 ² Department of Geology, Institute of Science, Shinshu University, 3-1-1 Asahi, Matsumoto 390-8621, Japan. Correspondence author: hoya101@shinshu-u.ac.jp ³ Geological Survey of Japan, AIST, 1-1-1 Higashi, Tsukuba 305-8567, Japan. ⁴ Center for Advanced Marine Core Research, Kochi University, Nankoku 783-8502, Japan. ⁵ International Ocean Discovery Program, Texas A&M University, College Station, TX 77845, USA. ⁶ School of Earth and Environmental Sciences, Queens College, CUNY, 65-30 Kissena Boulevard, Flushing NY 11367, USA. ⁷ University of Texas Institute for Geophysics, John A. and Katherine G. Jackson School of Geosciences, J.J. Pickle Research Campus, Building 196 (ROC), 10100 Burnet Road (R2200), Austin TX 78758-4445, USA. Initial receipt: 27 March 2016 Acceptance: 22 June 2018 Publication: 7 September 2018 MS 317-210 Top of page \| Previous \| Next