Dataset Available

Methane flux data from sediment cores collected near the Woolsey carbonate-gas hydrate mound, Mississippi Canyon, January 2011

Authors: Jeffrey Chanton
Published On: Jul 13 2016 20:04 UTC
DOI: https://doi.org/10.7266/N7FN1475
UDI: R1.x132.134:0054
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Project Information

Funded By:
Gulf of Mexico Research Initiative

Funding Cycle:
RFP-I

Research Group:
Ecosystem Impacts of Oil and Gas Inputs to the Gulf (ECOGIG)

Point of Contact

Jeffrey Paul Chanton
Florida State University / Department of Earth, Ocean, and Atmospheric Science
jchanton@fsu.edu

Data Collection Period
2011-01-01
to
2011-01-31
Theme keywords

gas hydrate, geochemistry, methane flux, MC118

ISO 19115-2 Metadata
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Abstract:

This dataset reports methane, ethane, and propane concentrations from sediment cores collected near a carbonate-gas hydrate mound, Woolsey Mound. Data from 65 samples, representing 5 sediment cores are provided. Sediment cores were collected along the Louisiana shelf slope, in Mississippi Canyon, lease block 118 (MC118) using piston-assisted gravity cores (JPC Cores, TDI Brooks International, Inc) in January 2011. Dissolved inorganic carbon, sulfate, and chloride concentrations are also reported in this dataset file. These data were used to characterize gas source and calculate methane flux.

Suggested Citation:

Jeffrey Chanton. 2016. Methane flux data from sediment cores collected near the Woolsey carbonate-gas hydrate mound, Mississippi Canyon, January 2011. Distributed by: GRIIDC, Harte Research Institute, Texas A&M University–Corpus Christi. doi:10.7266/N7FN1475

Publications:

Wilson, R. M., Macelloni, L., Simonetti, A., Lapham, L., Lutken, C., Sleeper, K., … Chanton, J. (2014). Subsurface methane sources and migration pathways within a gas hydrate mound system, Gulf of Mexico. Geochem. Geophys. Geosyst., 15(1), 89–107. doi:10.1002/2013gc004888

Purpose:

The primary objective in this study is to assess the role of faults as conduits for deep thermogenic methane to reach the sediment surface and support hydrate formation. To achieve that goal, we will use systematic geochemical profiling at coring sites both proximal and distal to the major faults underlying a gas hydrate/carbonate mound (Woolsey Mound) to evaluate whether or not these faults do supply thermogenic methane to the subsurface sediments and control the distribution of gas hydrates at this seep site.

Data Parameters and Units:

depth (centimeters), porosity (%), methane (micromole), ethane (micromole), propane (micromole), d13C-CH4 , d13C-DIC, DIC Dissolved Inorganic Carbon (millimole), [SO42-] sulfate concentration (millimole), [Cl-]chloride concentration (millimoles) Specific core locations were JPC-1; 28.850368, -88.494047, COLLECTED JAN 25, 2011 JPC-2; 28.852007, -88.488738, COLLECTED JAN 25, 2011 JPC-3 28.859507, -88.490878, COLLECTED JAN 26, 2011 JPC-6; 28.850368, -88.494047, COLLECTED JAN 26, 2011 JPC-7; 28.862223, -88.486098, COLLECTED JAN 27, 2011

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