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doi:10.2204/iodp.proc.303306.207.2009

Data report: carbon stable isotope ratios of dissolved inorganic carbon in interstitial waters from IODP Expedition 303 Sites U1305, U1306, and U1307 (Eirik Drift)¹

Atsuhito Ennyu² and Mitchell J. Malone³

Abstract

In this data report, we present carbon stable isotope (δ¹³C) analyses of dissolved inorganic carbon (DIC) in interstitial water samples from Integrated Ocean Drilling Program Expedition 303 Sites U1305, U1306, and U1307 on the Eirik Drift in the Labrador Sea. A total of 84 interstitial water samples extracted on board were analyzed postcruise in this study. The low- to intermediate-resolution (from ~3 to 30 m interval) data allow us to identify downhole trends in δ¹³C_DIC. Our results show a downhole decreasing trend in δ¹³C_DIC in the upper ~50–80 meters below seafloor (mbsf) at the three sites studied. The most depleted δ¹³C_DIC values occur at 51.4, 85.8, and 79.2 mbsf at Sites U1305, U1306, and U1307, respectively. Below the depths of δ¹³C_DIC minima, δ¹³C_DIC values generally increase toward the bottom of the cored interval.

¹ Ennyu, A., and Malone, M.J., 2009. Data report: carbon stable isotope ratios of dissolved inorganic carbon in interstitial waters from IODP Expedition 303 Sites U1305, U1306, and U1307 (Eirik Drift). In Channell, J.E.T., Kanamatsu, T., Sato, T., Stein, R., Alvarez Zarikian, C.A., Malone, M.J., and the Expedition 303/306 Scientists, Proc. IODP, 303/306: College Station, TX (Integrated Ocean Drilling Program Management International, Inc.).
doi:10.2204/​iodp.proc.303306.207.2009

² Itochu Oil Exploration Co., Ltd., 2-5-1 Kita-Aoyama, Minato-ku, Tokyo 107-0061, Japan. aennyu@usa.net

³ Integrated Ocean Drilling Program, Texas A&M University, College Station TX 77845-3115, USA.

Initial receipt: 9 May 2008
Acceptance: 30 March 2009
Publication: 19 June 2009
MS 303306-207

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