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Mangelsdorf, Kai; Zink, Klaus-Gerhard; di Primio, Rolando; Horsfield, Brian (2011): Total organic carbon, delta13C, biomarker, gas compilations and hopanoids analysis from IODP Sites 307-U1317 and 307-U1318 [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.764019, Supplement to: Mangelsdorf, K et al. (2011): Microbial lipid markers within and adjacent to Challenger Mound in the Belgica carbonate mound province, Porcupine Basin, offshore Ireland (IODP Expedition 307). Marine Geology, 282(1-2), 91-101, https://doi.org/10.1016/j.margeo.2010.05.007

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Abstract:
During the Integrated Ocean Drilling Program (IODP) Expedition 307 for the first time a cold-water coral carbonate mound was drilled down through its base into the underlying sediments. In the current study, sample material from within and below Challenger Mound, located in the Belgica carbonate mound province in the Porcupine Basin offshore Ireland, was investigated for its distribution of microbial communities and gas composition using biogeochemical and geochemical approaches to elucidate the question on the initiation of carbonate mounds. Past and living microbial populations are lower in the mound section compared to the underlying sediments or sediments of an upslope reference site. A reason for this might be a reduced substrate feedstock, reflected by low total organic carbon (TOC) contents, in the once coral dominated mound sequence. In contrast, in the reference site a lithostratigraphic sequence with comparatively high TOC contents shows higher abundances of both past and present microbial communities, indicating favourable living conditions from time of sedimentation until today. Composition and isotopic values of gases below the mound base seem to point to a mixed gas of biogenic and thermogenic origin with a higher proportion of biogenic gas. Oil-derived hydrocarbons were not detected at the mound site. This suggests that at least in the investigated part of the mound base the upward flow of fossil hydrocarbons, being one hypothesis for the initiation of the formation of carbonate mounds, seems to be only of minor significance.
Project(s):
Integrated Ocean Drilling Program / International Ocean Discovery Program (IODP)
Coverage:
Median Latitude: 51.408321 * Median Longitude: -11.634319 * South-bound Latitude: 51.380533 * West-bound Longitude: -11.718467 * North-bound Latitude: 51.436033 * East-bound Longitude: -11.550300
Event(s):
307-U1317A * Latitude: 51.380800 * Longitude: -11.718467 * Elevation: -815.1 m * Recovery: 141.94 m * Campaign: Exp307 (Porcupine Basin Carbonate Mounds) * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 18 cores; 138.8 m cored; 102.3 % recovered; 0 m drilled; 138.8 m penetrated
307-U1317D * Latitude: 51.380533 * Longitude: -11.718200 * Elevation: -794.0 m * Recovery: 101.52 m * Campaign: Exp307 (Porcupine Basin Carbonate Mounds) * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 18 cores; 160 m cored; 63.5 % recovered; 110 m drilled; 270 m penetrated
307-U1318A * Latitude: 51.436033 * Longitude: -11.550300 * Elevation: -409.3 m * Recovery: 128.33 m * Campaign: Exp307 (Porcupine Basin Carbonate Mounds) * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 15 cores; 142.2 m cored; 90.2 % recovered; 0 m drilled; 142.2 m penetrated
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
4 datasets

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Datasets listed in this publication series

  1. Mangelsdorf, K; Zink, K-G; di Primio, R et al. (2011): (Table 3) Methane, ethane, propane, n-butane, iso-butane and carbon dioxide concentrations, gas wetness and iso-butane/n-butane ratios as well as carbon and hydrogen isotope data of methane from IODP Holes 307-U1317A and 307-U1317D. https://doi.org/10.1594/PANGAEA.763996
  2. Mangelsdorf, K; Zink, K-G; di Primio, R et al. (2011): (Table 1) Total organic carbon, delta13C and biomarker concentrations from IODP Holes 307-U1317A and 307-U1317D. https://doi.org/10.1594/PANGAEA.763994
  3. Mangelsdorf, K; Zink, K-G; di Primio, R et al. (2011): (Table 5) Total phospholipids, phosphatidylglycerol- and phosphatidylethanolamine esters concentrations from IODP Holes 307-U1318A and 307-U1318B. https://doi.org/10.1594/PANGAEA.763999
  4. Mangelsdorf, K; Zink, K-G; di Primio, R et al. (2011): (Table 4) Total organic carbon, delta13C and biomarker concentrations from IODP Holes 307-U1318A and 307-U1318B. https://doi.org/10.1594/PANGAEA.763997