C1-C8 hydrocarbons in DSDP Leg 64 Holes sediments

Autoria(s): Whelan, Jean K; Hunt, John M
Cobertura

MEDIAN LATITUDE: 26.339437 * MEDIAN LONGITUDE: -110.928356 * SOUTH-BOUND LATITUDE: 22.962000 * WEST-BOUND LONGITUDE: -111.624800 * NORTH-BOUND LATITUDE: 27.846000 * EAST-BOUND LONGITUDE: -108.980700 * DATE/TIME START: 1978-12-02T00:00:00 * DATE/TIME END: 1979-01-03T00:00:00
Data(s)

30/08/1982
Resumo

Sediments from the Baja California Continental Margin Transect - Sites 474 and 476 - showed small amounts of C2-C8 hydrocarbons and functionalized compounds (alkenes) typical of organic-rich, Recent, cold (<30°C) marine sediments. In contrast, some samples from Sites 477, 478, 479, and Hole 481A in the Guaymas Basin, an active spreading center, showed the characteristics of thermally generated hydrocarbons. These include an increase (sometimes exponential) in amount and diversity of C2-C8 hydrocarbons and a decrease in alkenes in more thermally mature sediments. The results indicate that the injection of basaltic sills has minimal effect on C2-C8 hydrocarbon generation except in the immediate vicinity of the sill. The absence of light hydrocarbons close to the hottest sills suggests that the compounds distill away as they are formed in these areas of very active hydrothermal circulation. A sample of young sediment exposed to very high temperatures (>300°C) from deeper thermal sources at the hottest site, 477, showed a very limited hydrocarbon distribution, including primarily ethane, benzene, and toluene, together with smaller amounts of propane and butane.
Formato

application/zip, 2 datasets
Identificador

https://doi.pangaea.de/10.1594/PANGAEA.818767

doi:10.1594/PANGAEA.818767
Idioma(s)

en
Publicador

PANGAEA
Direitos

CC-BY: Creative Commons Attribution 3.0 Unported

Access constraints: unrestricted
Fonte

Supplement to: Whelan, Jean K; Hunt, John M (1982): C1-C8 hydrocarbons in Leg 64 sediments, Gulf of California. In: Curray, JR; Moore, DG; et al. (eds.), Initial Reports of the Deep Sea Drilling Project (U.S. Govt. Printing Office), 64, 763-779, doi:10.2973/dsdp.proc.64.123.1982
Palavras-Chave #-; # = Heating rate, 60°/min.; all others, 120°/min; # = Shipboard values; #0.2 = 1 trans-3-Dimethylcyclopentane +1 trans-2-Dimethylcyclopentane per unit sediment mass; #0.2 = 2-Methylhexane + 2,3-Dimethylpentane per unit sediment mass; #A; Methylethylcyclopentane per unit sediment mass; Represent different positional and cis-/trans-isomers. Exact stereochemical assignments not known; #B; Methylethylcyclopentane per unit sediment mass; Represent different positional and cis-/trans-isomers. Exact stereochemical assignments not known; #C; Methylethylcyclopentane per unit sediment mass; Represent different positional and cis-/trans-isomers. Exact stereochemical assignments not known; #D; Methylethylcyclopentane per unit sediment mass; Represent different positional and cis-/trans-isomers. Exact stereochemical assignments not known; #E; Methylethylcyclopentane per unit sediment mass; Represent different positional and cis-/trans-isomers. Exact stereochemical assignments not known; 1,1,2-TMP/sed; 1,1,2-trimethylpentane per unit sediment mass; 1,1,3-TMP/sed; 1,1,3-trimethylpentane per unit sediment mass; 1,1-Dimethylcyclohexane per unit sediment mass; 1,1-Dimethylcyclopentane per unit sediment mass; 1,1-DMCH/sed; 1,1 DMCP/sed; 1,2-Dimethylcyclopentene per unit sediment mass; 1,2-DMCP/sed; 1,3-Dimethylcyclopentene per unit sediment mass; 1,3-DMCP/sed; 1,5-Dimethylcyclopentene per unit sediment mass; 1,5-DMCP/sed; 1,cis-2-Dimethylcyclopentane per unit sediment mass; 1, cis-2 DMCP/sed; 1,cis-3-Dimethylcyclopentane + 3-Methylhexane per unit sediment mass; 1,cis-3-Dimethylcyclopentane per unit sediment mass; 1, cis-3 DMCP/sed; 1,trans-2,cis-4-trimethylcyclopentane per unit sediment mass; 1C2DMCH/sed; 1C2T3TMCP/sed; 1C2T4TMCP/sed; 1-cis-2-dimethylcyclohexane per unit sediment mass; 1-cis-2-trans-3-trimethylcyclopentane per unit sediment mass; 1-cis-2-trans-4-trimethylcyclopentane per unit sediment mass; 1T2DMCH/sed; 1-trans-2-dimethylcyclohexane per unit sediment mass; 1 trans-2-Dimethylcyclopentane per unit sediment mass; 1 trans-2 DMCP/sed; 1 trans-3-Dimethylcyclopentane per unit sediment mass; 1 trans-3 DMCP/sed; 1-trans-4-dimethylcyclohexane per unit sediment mass; 2,2,3-TMB/sed; 2,2,3-trimethylbutane per unit sediment mass; 2,2,4-TMB/sed; 2,2,4-trimethylpentane per unit sediment mass; 2,2,5-TMH/sed; 2,2,5-Trimethylhexane per unit sediment mass; 2,2-Dimethylbutane per unit sediment mass; 2,2-dimethylhexane per unit sediment mass; 2,2-Dimethylpentane per unit sediment mass; 2,2-Dimethylpropane per unit sediment mass; 2,2 DMB/sed; 2,2 DMP/sed; 2,3,4-trimethylpentane per unit sediment mass; 2,3-Dimethylbutane per unit sediment mass; 2,3-Dimethylpentane per unit sediment mass; 2,3 DMB/sed; 2,3 DMP/sed; 2,4-dimethylhexane per unit sediment mass; 2,4-Dimethylpentane per unit sediment mass; 2,4-DMH/sed; 2,4 DMP/sed; 2,5-Dimethylhexane per unit sediment mass; 234TMP/sed; 2-hexene/sed; 2-hexene per unit sediment mass; 2-MB/sed; 2-Methiophene/sed; 2-Methiophene per unit sediment mass; 2-Methylbutane per unit sediment mass; 2-Methylhexane per unit sediment mass; 2-Methylpentane per unit sediment mass; 3,3-Dimethylpentane per unit sediment mass; 3,3 DMP/sed; 3-Ethylpentane/sed; 3-Ethylpentane per unit sediment mass; 3-MB/sed; 3-Methiophene/sed; 3-Methiophene per unit sediment mass; 3-Methylbutane per unit sediment mass; 3-Methylheptane per unit sediment mass; 3-Methylhexane/sed; 3-Methylhexane per unit sediment mass; 3-Methylpentane/sed; 3-Methylpentane per unit sediment mass; 3-Mhept/sed; 4-Methylpentane/sed; 4-Methylpentane per unit sediment mass; 64-474; 64-476; 64-477; 64-478; 64-479; 64-481; 64-481A; Benzene + 2,4-Dimethylpentane per unit sediment mass; Benzene per unit sediment mass; C1; C1 hydrocarbons; C2+C3/sed; C2+C3 hydrocarbons per unit sediment mass; C2H6/sed; C3H8/sed; C4 - C7/sed; C4-C7 hydrocarbons per unit sediment mass; C5H10/sed; C6H14/sed; C6H5CH3/sed; C6H6/sed; C7H14/sed; C8/sed; C8H10/sed; C8H16/sed; C8H18/sed; C8 hydrocarbons per unit sediment mass; Carbon, organic, per unit sediment mass; Carbon, organic, total, standard deviation; Carbon, total, per unit sediment mass; CH4/sed; Corg/sed; CT/sed; Cyclohexane per unit sediment mass; Cyclopentane per unit sediment mass; Deep Sea Drilling Project; Depth; DEPTH, sediment/rock; Description; Dimethylcyclopentane per unit sediment; DMCP/sed; DRILL; Drilling/drill rig; DSDP; ECH/sed; Epoch; Ethane per unit sediment mass; Ethylbenzene per unit sediment mass; Ethylcyclohexane per unit sediment mass; Ethylcyclopentane per unit sediment mass; Event; Gas chromatography - Mass spectrometry (GC-MS); Given for duplicate samples; Glomar Challenger; HC/sed; Hydrocarbon per unit sediment; i-C4H10/sed; i-C5H12/sed; i-C6H14/sed; i-C7H16/sed; Including 2-Methylpentane, 3-Methylpentane and 4-Methylpentane per unit sediment mass; i-PropCP per unit sediment mass, unit is ng/g; Isobutane per unit sediment mass; Isopentane per unit sediment mass; Label; Leg64; Lithology; Lithology/composition/facies; mbsf; MCP/sed; Methane per unit sediment mass; Methylcyclohexane per unit sediment mass; Methylcyclopentane per unit sediment mass; n-Butane per unit sediment mass; n-C4H10/sed; n-C5H12/sed; n-C6H14/sed; n-C7/sed; n-C8; n-Heptane per unit sediment mass; n-Hexane per unit sediment mass; North Pacific/Gulf of California/BASIN; North Pacific/Gulf of California/CHANNEL; North Pacific/Gulf of California/TERRACE; n-Pentane per unit sediment mass; ODP sample designation; Other compounds, unit is ng/g; Peak height; PI; Production index, S1/(S1+S2); Propane per unit sediment mass; Pyrolysis temperature maximum; Sample code/label; Samples 64-479-29-5,130-134 to 64-479-43-1,120-125 # = Identified as either ethylbenzene or another unknown C8 with about the same retention time; Saturated and aromatic hydrocarbons; Tetra; Thermal distillation-pyrolysis; Tmax; TOC std dev; Toluene per unit sediment mass; Xylene/sed; Xylene per unit sediment mass
Tipo

Dataset
Acesso ao item digital