Schaefer, Rainer G; von der Dick, Hans; Leythaeuser, Detlev (1983): (Table 1) Low molecular weight hydrocarbon concentrations and organic carbon contents at DSDP Hole 71-511 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.815221, Supplement to: Schaefer, RG et al. (1983): C2–C8 hydrocarbons in sediments from Deep Sea Drilling Project Leg 71, Site 511, Falkland Plateau, South Atlantic. In: Ludwig, WJ; Krasheninnikov, VA; et al. (eds.), Initial Reports of the Deep Sea Drilling Project (U.S. Govt. Printing Office), 71, 1033-1043, https://doi.org/10.2973/dsdp.proc.71.139.1983
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Abstract:
C2-C8 hydrocarbons (36 compounds identified) from 56 shipboard sealed, deep-frozen core samples of DSDP Leg 71, Site 511, Falkland Plateau, South Atlantic, were analyzed by a combined hydrogen stripping-thermovaporization method. Concentrations, which represent hydrocarbons dissolved in the pore water and adsorbed to the mineral surfaces of the sediment, vary from 24 ng/g of dry weight sediment in Lithologic Unit 4 to 17,400 ng/g in Lithologic Unit 6 ("black shale" unit). Likewise, the organic carbon normalized C2-C8 hydrocarbon concentrations range from 104 to 3.5 x 105 ng/g Corg. The latter value is more than one order of magnitude lower than expected for petroleum source beds in the main phase of oil generation. The low maturity at 600 meters depth is further supported by light hydrocarbon concentration ratios. The change of the kerogen type from Lithologic Unit 5 (Type III) to 6 (Type II) is evidenced by changes in the C6 and C7 hydrocarbon composition. Redistribution phenomena are observed close to the Tertiary-Cretaceous unconformity and at the contact between the "black shale" unit and the overlying Cretaceous chalks and claystones. Otherwise, the low molecular weight hydrocarbons in Hole 511 are formed in situ and remain at their place of formation.
The core samples turned out to be contaminated by large quantities of acetone, which is routinely used as a solvent during sampling procedures onboard Glomar Challenger.
Project(s):
Deep Sea Drilling Project (DSDP)
Coverage:
Latitude: -51.004700 * Longitude: -46.971700
Date/Time Start: 1980-01-15T00:00:00 * Date/Time End: 1980-01-15T00:00:00
Minimum DEPTH, sediment/rock: 159.49 m * Maximum DEPTH, sediment/rock: 605.36 m
Event(s):
71-511 * Latitude: -51.004700 * Longitude: -46.971700 * Date/Time: 1980-01-15T00:00:00 * Elevation: -2589.0 m * Penetration: 632 m * Recovery: 384.4 m * Location: South Atlantic/PLATEAU * Campaign: Leg71 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 68 cores; 616.5 m cored; 14.5 m drilled; 62.4 % recovery
Comment:
Sediment depth is given in mbsf. # = about; #0 = concentration below or near detection limit, empty cells = not measured or not determined because of peak overlapping.
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Sample code/label | Sample label | Schaefer, Rainer G | DSDP/ODP/IODP sample designation | ||
| 2 | DEPTH, sediment/rock | Depth sed | m | Geocode | ||
| 3 | Ethane per unit sediment mass | C2H6/sed | ng/g | Schaefer, Rainer G | see reference(s) | |
| 4 | Propane per unit sediment mass | C3H8/sed | ng/g | Schaefer, Rainer G | see reference(s) | |
| 5 | Isobutane per unit sediment mass | i-C4H10/sed | ng/g | Schaefer, Rainer G | see reference(s) | |
| 6 | Methylpropene per unit sediment mass | i-C4H8/sed | ng/g | Schaefer, Rainer G | see reference(s) | + 1-butene |
| 7 | n-Butane per unit sediment mass | n-C4H10/sed | ng/g | Schaefer, Rainer G | see reference(s) | |
| 8 | Trans-2-butene per unit sediment mass | trans-C4H8/sed | ng/g | Schaefer, Rainer G | see reference(s) | |
| 9 | 2,2-Dimethylpropane per unit sediment mass | 2,2 DMP/sed | ng/g | Schaefer, Rainer G | see reference(s) | |
| 10 | Cis-2-butene per unit sediment mass | cis-C4H8/sed | ng/g | Schaefer, Rainer G | see reference(s) | |
| 11 | Isopentane per unit sediment mass | i-C5H12/sed | ng/g | Schaefer, Rainer G | see reference(s) | |
| 12 | n-Pentane per unit sediment mass | n-C5H12/sed | ng/g | Schaefer, Rainer G | see reference(s) | |
| 13 | 2,2-Dimethylbutane per unit sediment mass | 2,2 DMB/sed | ng/g | Schaefer, Rainer G | see reference(s) | |
| 14 | Cyclopentane per unit sediment mass | C5H10/sed | ng/g | Schaefer, Rainer G | see reference(s) | |
| 15 | 2,3-Dimethylbutane per unit sediment mass | 2,3 DMB/sed | ng/g | Schaefer, Rainer G | see reference(s) | |
| 16 | 2-Methylpentane per unit sediment mass | i-C6H14/sed | ng/g | Schaefer, Rainer G | see reference(s) | |
| 17 | 3-Methylpentane per unit sediment mass | 3-Methylpentane/sed | ng/g | Schaefer, Rainer G | see reference(s) | |
| 18 | n-Hexane per unit sediment mass | n-C6H14/sed | ng/g | Schaefer, Rainer G | see reference(s) | |
| 19 | Methylcyclopentane per unit sediment mass | MCP/sed | ng/g | Schaefer, Rainer G | see reference(s) | + 2,2-dimethylpentane |
| 20 | 2,4-Dimethylpentane per unit sediment mass | 2,4 DMP/sed | ng/g | Schaefer, Rainer G | see reference(s) | |
| 21 | Benzene per unit sediment mass | C6H6/sed | ng/g | Schaefer, Rainer G | see reference(s) | |
| 22 | Cyclohexane per unit sediment mass | C6H14/sed | ng/g | Schaefer, Rainer G | see reference(s) | |
| 23 | 2-Methylhexane per unit sediment mass | i-C7H16/sed | ng/g | Schaefer, Rainer G | see reference(s) | |
| 24 | 2,3-Dimethylpentane per unit sediment mass | 2,3 DMP/sed | ng/g | Schaefer, Rainer G | see reference(s) | + 1,1 -dimethylcyclopentane |
| 25 | 3-Methylhexane per unit sediment mass | 3-Methylhexane/sed | ng/g | Schaefer, Rainer G | see reference(s) | |
| 26 | 1,cis-3-Dimethylcyclopentane per unit sediment mass | 1, cis-3 DMCP/sed | ng/g | Schaefer, Rainer G | see reference(s) | |
| 27 | 1 trans-3-Dimethylcyclopentane per unit sediment mass | 1 trans-3 DMCP/sed | ng/g | Schaefer, Rainer G | see reference(s) | |
| 28 | 1 trans-2-Dimethylcyclopentane per unit sediment mass | 1 trans-2 DMCP/sed | ng/g | Schaefer, Rainer G | see reference(s) | |
| 29 | n-Heptane per unit sediment mass | n-C7/sed | ng/g | Schaefer, Rainer G | see reference(s) | |
| 30 | 1,cis-2-Dimethylcyclopentane per unit sediment mass | 1, cis-2 DMCP/sed | ng/g | Schaefer, Rainer G | see reference(s) | |
| 31 | Methylcyclohexane per unit sediment mass | C7H14/sed | ng/g | Schaefer, Rainer G | see reference(s) | |
| 32 | 2,5-Dimethylhexane per unit sediment mass | C8H18/sed | ng/g | Schaefer, Rainer G | see reference(s) | |
| 33 | Ethylcyclopentane per unit sediment mass | C7H14/sed | ng/g | Schaefer, Rainer G | see reference(s) | |
| 34 | 1,trans-2,cis-4-trimethylcyclopentane per unit sediment mass | C8H16/sed | ng/g | Schaefer, Rainer G | see reference(s) | |
| 35 | 1,trans-2,cis-3-trimethylcyclopentane per unit sediment mass | C8H16/sed | ng/g | Schaefer, Rainer G | see reference(s) | |
| 36 | Toluene per unit sediment mass | C6H5CH3/sed | ng/g | Schaefer, Rainer G | see reference(s) | |
| 37 | 2-Methylheptane per unit sediment mass | C8H18/sed | ng/g | Schaefer, Rainer G | see reference(s) | |
| 38 | n-Octane per unit sediment mass | n-C8/sed | ng/g | Schaefer, Rainer G | see reference(s) | |
| 39 | Carbon, organic, total | TOC | % | Schaefer, Rainer G | Element analyser CHN, LECO | |
| 40 | Hydrogen index, mass HC, per unit mass total organic carbon | HI, HC/TOC | mg/g | Schaefer, Rainer G | Rock eval pyrolysis (Espitalié et al. 1977) |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
2067 data points
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