Data report; Carbon isotope composition of total dissolved inorganic carbon in interstitial water, Sites U1316, U1317, and U1318, Porcupine Seabight

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doi: 10.2204/iodp.proc.307.206.2009
Author(s): Frank, Tracy D.
Integrated Ocean Drilling Program, Expedition 307 Scientists, College Station, TX
Author Affiliation(s): Primary:
University of Nebraska-Lincoln, Department fo Geosciences, Lincoln, NE, United States
Other:
Hiroshima University, Japan
Lamont-Doherty Earth Observatory, United States
Japan Agency of Marine-Earth Science and Technology, Japan
University of Tsukuba, Japan
Rosenstiel School of Marine and Atmospheric Science, United States
University of Copenhagen, Denmark
University of Nebraska-Lincoln, United States
Cardiff University, United Kingdom
Universitat de Barcelona, Spain
Universiteit Gent, Belgium
Toyama University, Japan
University of Hawaii at Manoa, United States
University of Missouri-Rolla, United States
National Oceanography Centre-Southampton, United Kingdom
Université de Provence, France
Chengdu University of Technology, China
GeoForschungsZentrum Potsdam, Federal Republic of Germany
Rice University, United States
University of Georgia, United States
Kanazawa Gakuin University, Japan
University of Rhode Island, United States
Geological Survey of Japan, Japan
Universität Erlangen-Nürnberg, Federal Republic of Germany
Volume Title: Proceedings of the Integrated Ocean Drilling Program; modern carbonate mounds; Porcupine drilling; Expedition 307 of the riserless drilling platform; Dublin, Ireland, to Mobile, Alabama; Sites U1316-U1318, 25 April-30 May 2005
Volume Author(s): Ferdelman, Timothy; Kano, Akihiro; Williams, Trevor; Gaillot, Philippe; Abe, Kohei; Andres, Miriam S.; Bjerager, Morten; Browning, Emily L.; Cragg, Barry A.; De Mol, Ben; Foubert, Anneleen; Frank, Tracy D.; Fuwa, Yuji; Gharib, Jamshid J.; Gregg, Jay M.; Huvenne, Veerle Ann Ida; Léonide, Philippe; Li Xianghui; Mangelsdorf, Kai; Novosel, Ivana; Sakai, Saburo; Samarkin, Vladimir A.; Sasaki, Keiichi; Spivack, Arthur J.; Takashima, Chizuru; Tanaka, Akiko; Titschack, Jürgen
Source: Proceedings of the Integrated Ocean Drilling Program; modern carbonate mounds; Porcupine drilling; Expedition 307 of the riserless drilling platform; Dublin, Ireland, to Mobile, Alabama; Sites U1316-U1318, 25 April-30 May 2005, Timothy Ferdelman, Akihiro Kano, Trevor Williams, Philippe Gaillot, Kohei Abe, Miriam S. Andres, Morten Bjerager, Emily L. Browning, Barry A. Cragg, Ben De Mol, Anneleen Foubert, Tracy D. Frank, Yuji Fuwa, Jamshid J. Gharib, Jay M. Gregg, Veerle Ann Ida Huvenne, Philippe Léonide, Li Xianghui, Kai Mangelsdorf, Ivana Novosel, Saburo Sakai, Vladimir A. Samarkin, Keiichi Sasaki, Arthur J. Spivack, Chizuru Takashima, Akiko Tanaka and Jürgen Titschack; Integrated Ocean Drilling Program, Expedition 307 Scientists, College Station, TX. Proceedings of the Integrated Ocean Drilling Program, Vol.307. Publisher: IODP Management International, Washington, DC, United States. ISSN: 1930-1014
Note: In English. 8 refs.; illus., incl. 1 table
Summary: The carbon isotope composition of total dissolved inorganic carbon (DIC) was measured on 111 samples of interstitial water from Sites U1316-U1318 drilled during Integrated Ocean Drilling Program Expedition 307 to the Porcupine Seabight, southwest of Ireland. The analyses were performed to aid in understanding processes involved in the origin and development of Challenger Mound, a deepwater coral mound that was the focus of the expedition. Site U1317 was drilled into the northwest shoulder of Challenger Mound, whereas Sites U1316 and U1318 penetrated siliciclastic slope facies that accumulated downslope and upslope of the mound, respectively. The δ13CDIC values in interstitial water range from -18.3 ppm to +3.9 ppm Vienna Peedee belemnite. Maximum and minimum values occur in juxtaposition in the two deepest samples recovered from Site U1317 and correspond to a maximum in dissolved methane. At all three sites, downhole profiles of δ13CDIC values show a marked change in slope across a major unconformity between the middle Miocene and upper Pliocene series. At Site U1317, δ13CDIC values decrease from -2.5 ppm to -8.5 ppm from the top of the core to the unconformity at ∼122 meters below seafloor (mbsf). Below this depth, values increase overall to a maximum value of +3.9 ppm. At Sites U1316 and U1318, the δ13CDIC values decrease markedly over the uppermost 10 m to values lower than -15 ppm before increasing with depth to approximately -6 ppm at the middle Miocene/upper Pliocene unconformity. Below the unconformity, δ13CDIC values increase with depth toward maxima ranging between 0 ppm and +1.5 ppm.
Year of Publication: 2009
Research Program: IODP Integrated Ocean Drilling Program
Key Words: 02 Geochemistry; Atlantic Ocean; Boreholes; C-13/C-12; Carbon; Carbonates; Cenozoic; Challenger Mound; Cores; Expedition 307; Geochemistry; Hydrochemistry; IODP Site U1316; IODP Site U1317; IODP Site U1318; Inorganic materials; Integrated Ocean Drilling Program; Isotope ratios; Isotopes; Marine sediments; Miocene; Mounds; Neogene; North Atlantic; Northeast Atlantic; Pliocene; Porcupine Seabight; Pore water; Sediments; Solutes; Stable isotopes; Tertiary; Variations
Coordinates: N512300 N512300 W0114400 W0114400
N512300 N512300 W0114300 W0114300
N512600 N512600 W0113300 W0113300
Record ID: 2009060810
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