Shulga, N A; Peresypkin, Valery I; Revelskii, I A (2010): (Table 3) Relative content of n-alkane groups in samples from hydrothermal fields of the Mid-Atlantic Ridge [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.770016, Supplement to: Shulga, NA et al. (2010): Composition research of n-alkanes in the samples of hydrothermal deposits of the Mid-Atlantic Ridge by means of gas chromatography - mass spectrometry. Translated from Okeanologiya, 2010, 50(4), 515-523, Oceanology, 50(4), 479-487, https://doi.org/10.1134/S0001437010040041
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Abstract:
Optimum conditions were selected for chromatographic separation of model mixtures of C12-C40 n-alkanes. For one of samples of hydrothermal deposits extraction conditions of hydrocarbons were studied and a sample preparation procedure was selected. The procedure was proposed to determine n-alkanes in samples of hydrothermal deposits by means of gas chromatography - mass spectrometry (GC-MS). Detection limit for n-alkanes was 3x10**-9 to 10**-8% depending on components. On the basis of the proposed procedure composition of n-alkanes was studied in samples of hydrothermal deposits collected at the Mid-Atlantic Ridge (Broken Spur, Lost City, and Rainbow hydrothermal fields). Analyses showed that samples contained C14-C35 n-alkanes. Concentrations of the n-alkanes were rather low and varied from 0.002 to 0.038 µg/g. Hypotheses concerning genesis of identified n-alkanes were offered.
Project(s):
Archive of Ocean Data (ARCOD)
Coverage:
Median Latitude: 31.839922 * Median Longitude: -39.730389 * South-bound Latitude: 29.167220 * West-bound Longitude: -43.174230 * North-bound Latitude: 36.230000 * East-bound Longitude: -33.900000
Minimum Elevation: -800.0 m * Maximum Elevation: -800.0 m
Event(s):
AMK50-4793-1 * Latitude: 29.167500 * Longitude: -43.174200 * Location: Broken Srur Hydrothermal Field, K point mound * Campaign: AMK50 * Basis: Akademik Mstislav Keldysh * Method/Device: MIR deep-sea manned submersible (MIR)
AMK50-4796-3 * Latitude: 29.167580 * Longitude: -43.174230 * Location: Broken Srur Hydrothermal Field, Triple Chimney mound * Campaign: AMK50 * Basis: Akademik Mstislav Keldysh * Method/Device: MIR deep-sea manned submersible (MIR)
AMK50-4797-8 * Latitude: 29.167220 * Longitude: -43.174070 * Location: Broken Srur Hydrothermal Field, Spire mound * Campaign: AMK50 * Basis: Akademik Mstislav Keldysh * Method/Device: MIR deep-sea manned submersible (MIR)
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | ||||
| 2 | Latitude of event | Latitude | ||||
| 3 | Longitude of event | Longitude | ||||
| 4 | Elevation of event | Elevation | m | |||
| 5 | Area/locality | Area | Shulga, N A | |||
| 6 | Sample type | Samp type | Shulga, N A | |||
| 7 | i-C19/i-C20 ratio | i-C19/i-C20 | Shulga, N A | Gas chromatography - Mass spectrometry (GC-MS) | ||
| 8 | Carbon Preference Index | CPI | Shulga, N A | Calculated | ||
| 9 | Sum(C14-C22)/sum(C23-C35) n-alkanes ratio | sum(C14-C22)/sum(C23-C35) | Shulga, N A | Gas chromatography - Mass spectrometry (GC-MS) | ||
| 10 | Sum n-alkanes C14-C17 | C14-C17 | % | Shulga, N A | Gas chromatography - Mass spectrometry (GC-MS) | |
| 11 | Sum n-alkanes C18-C22 | C18-C22 | % | Shulga, N A | Gas chromatography - Mass spectrometry (GC-MS) | |
| 12 | Sum n-alkanes C20-C24 | C20-C24 | % | Shulga, N A | Gas chromatography - Mass spectrometry (GC-MS) | |
| 13 | Sum n-alkanes C23-C35 | C23-C35 | % | Shulga, N A | Gas chromatography - Mass spectrometry (GC-MS) | |
| 14 | n-Alkane, total per unit sediment mass | n-Alkane tot/sed | µg/g | Shulga, N A | Gas chromatography - Mass spectrometry (GC-MS) |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
90 data points
Data
| 1 Event | 2 Latitude | 3 Longitude | 4 Elevation [m] | 5 Area | 6 Samp type | 7 i-C19/i-C20 | 8 CPI | 9 sum(C14-C22)/sum(C23-C35) | 10 C14-C17 [%] | 11 C18-C22 [%] | 12 C20-C24 [%] | 13 C23-C35 [%] | 14 n-Alkane tot/sed [µg/g] |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| AMK50-4793-1 | 29.1675 | -43.1742 | Broken Spur | small sulfide chimneys accreted together | 0.4 | 0.9 | 0.3 | 2.4 | 19.9 | 27.8 | 77.7 | 0.014 | |
| AMK50-4797-8 | 29.1672 | -43.1741 | Broken Spur | diffuser shell formed by black fine-grained sulfide matter | 0.3 | 0.8 | 0.7 | 6.2 | 35.6 | 29.5 | 58.2 | 0.007 | |
| AMK50-4796-3 | 29.1676 | -43.1742 | Broken Spur | system of accreted chimneys 5-7 cm in diameter; chimney matter consists mainly of copper- and iron sulfides | 1.8 | 1.2 | 0.8 | 6.8 | 36.7 | 35.5 | 56.5 | 0.016 | |
| AMK50-4800-2 | 30.1250 | -42.1170 | Lost City | fragment of a carbonate formation | 3.7 | 1.0 | 0.5 | 11.8 | 20.8 | 20.0 | 67.2 | 0.004 | |
| AMK50-4800-7 | 30.1250 | -42.1170 | Lost City | dirty brown carbonate rock with bacterial overgrowth | 1.6 | 1.0 | 0.3 | 8.8 | 13.3 | 14.8 | 77.9 | 0.002 | |
| AMK50-4806-3 | 30.1170 | -42.1170 | -800 | Lost City | carbonate hydrothermal rock; sample surface is covered with a manganese crust up to 5 mm thick | 2.1 | 1.1 | 0.4 | 9.8 | 20.0 | 21.2 | 70.2 | 0.002 |
| AMK50-4815-6 | 36.2300 | -33.9000 | Rainbow | active hydrothermal chimney | 0.1 | 0.7 | 0.2 | 1.1 | 13.1 | 28.5 | 85.7 | 0.038 | |
| AMK50-4816-5 | 36.2300 | -33.9000 | Rainbow | active hydrothermal chimney; its surface is covered with a thin iron crust; chimney is formed of chalcopyrite | 0.3 | 1.0 | 0.3 | 8.1 | 14.7 | 15.0 | 77.1 | 0.002 | |
| AMK50-4816-1 | 36.2300 | -33.9000 | Rainbow | active hydrothermal chimney with hollow channels; sphalerite-pyrite-marcasite rock | 1.5 | 1.3 | 0.3 | 7.0 | 16.1 | 18.0 | 76.9 | 0.002 |