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PANGAEA.
Data Publisher for Earth & Environmental Science
Abstract:
Headspace (HS) gas concentrations of the above given hole of International Ocean Discovery Program (IODP) Expedition 386 (Japan Trench Paleoseismology). The offshore phase of this expedition took place between 2021-04-13 and 2021-06-01 onboard Japanese R/V Kaimei from and to Yokosuka, Japan, followed by an onshore phase onboard D/V Chikyu between 2022-02-14 – 2022-03-15. Following standard protocols for headspace sampling, all headspace samples were collected onboard (offshore) from the base of each section immediately after section cutting following core recovery on deck. Two parallel headspace samples (IODP standard and requested samples) were collected from the bottom of every GPC core section, the longest core from each site, and the respective shorter trigger core. For each headspace double sample, ~5 cm³ of sediment was collected (using two 2.5 cm³ tip-cut syringes). Each 2.5 cm³ headspace sample was then added to a 20 mL crimp vial with 5 mL of 1 M NaOH. After sealing, the samples were preserved at 4°C until analysis.
For further methodological information see methods chapter in Strasser, M. et al., 2023 https://doi.org/10.14379/iodp.proc.386.102.2023
Keyword(s):
Ethane; Headspace Gas; International Ocean Discovery Program (IODP); IODP; Japan Trench; Methane concentration
Related to:
Strasser, Michael; Ikehara, Ken; Everest, Jeremy D; IODP Expedition 386 Scientists (2023): Japan Trench Paleoseismology. Proceedings of the International Ocean Discovery Program, International Ocean Discovery Program, 386, https://doi.org/10.14379/iodp.proc.386.2023
Coverage:
Latitude: 38.758500 * Longitude: 144.128650
Date/Time Start: 2021-05-01T00:00:00 * Date/Time End: 2021-05-01T00:00:00
Minimum DEPTH, sediment/rock: 0.370 m * Maximum DEPTH, sediment/rock: 36.275 m
Event(s):
386-M0083D (JTPC-05A) * Latitude: 38.758500 * Longitude: 144.128650 * Date/Time Start: 2021-05-01T00:00:00 * Date/Time End: 2021-05-01T00:00:00 * Elevation: -7626.0 m * Location: Japan Trench * Campaign: Exp386 * Basis: Kaimei * Method/Device: Giant piston corer (GPC) * Comment: IGSN: IBCR0386EH24001. Comment: 40 m
Comment:
Data was submitted and proofread by Vera Barbara Bender, MARUM - Center for Marine Environmental Sciences (University Bremen) on behalf of ECORD Science Operator Data Management (https://www.ecord.org).
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
1Event labelEvent
2Sample code/labelSample labelDSDP/ODP/IODP sample designation
3Proposed International Geo Sample NumberProp IGSN
4DEPTH, sediment/rockDepth sedmGeocode
5MethaneCH4ppmvGas chromatography, Agilent Technologies, 7890A; injected (split mode) into an Agilent 7890B gas chromatograph equipped with HP PLOT-Q column
6EthaneC2H6ppmvGas chromatography, Agilent Technologies, 7890A; injected (split mode) into an Agilent 7890B gas chromatograph equipped with HP PLOT-Q column
7C1/C2 hydrocarbon ratioC1/C2Gas chromatography, Agilent Technologies, 7890A; injected (split mode) into an Agilent 7890B gas chromatograph equipped with HP PLOT-Q column
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
360 data points

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