Miocene stable isotope record of IODP Site 320-U1335 and revised stable isotope record of IODP Site 321-U1337 ...

• Main Authors: Kochhann, Karlos Guilherme Diemer, Holbourn, Ann E, Kuhnt, Wolfgang, Channell, James E T, Lyle, Mitchell W
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 2016
• Subjects: Integrated Ocean Drilling Program / International Ocean Discovery Program IODP; Antarc*; Antarctic; Ice Sheet
• Online Access: https://dx.doi.org/10.1594/pangaea.863701; https://doi.pangaea.de/10.1594/PANGAEA.863701

The Miocene Climatic Optimum (MCO; ~16.9 to 14.7 Ma) provides an outstanding opportunity to investigate climate-carbon cycle dynamics during a geologically recent interval of global warmth. We present benthic stable oxygen (d18O) and carbon (d13C) isotope records (5-12 kyr time resolution) spanning the late early to middle Miocene interval (18 to 13 Ma) at Integrated Ocean Drilling Program (IODP) Site U1335 (eastern equatorial Pacific Ocean). The U1335 stable isotope series track the onset and development of the MCO as well as the transitional climatic phase culminating with global cooling and expansion of the East Antarctic ice-sheet at ~13.8 Ma. We integrate these new data with published stable isotope, geomagnetic polarity and X-ray fluorescence (XRF) scanner-derived carbonate records from IODP Sites U1335, U1336, U1337 and U1338 on a consistent, astronomically-tuned timescale. Benthic isotope and XRF scanner-derived CaCO3 records depict prominent 100 kyr variability with 400 kyr cyclicity additionally ... : This Collection contains new stable isotope measurements at IODP Site 320-U1335 and the updated (revised composite depth scale) stable isotope record of IODP Site 321-U1337, originally published by Holbourn et al. (2015), with measured samples that were not included in the shipboard splice. ...