ten Haven, H Lo; Rullkötter, Jürgen (1988): (Table 1) Organic carbon and hydrogen index data for sediment samples from ODP Site 105-645 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.707415, Supplement to: ten Haven, HL; Rullkötter, J (1988): The diagenetic fate of taraxer-14-ene and oleanene isomers. Geochimica et Cosmochimica Acta, 52(10), 2543-2548, https://doi.org/10.1016/0016-7037(88)90312-2
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Abstract:
The extractable organic matter in Holocene to early Miocene deep-sea sediments from Site 645 (ODP Leg 105) in Baffin Bay contains almost exclusively biological markers of terrigenous origin. Pentacyclic triterpenoids of the alpha-(ursene) and beta-amyrin (oleanene) type often occur as the most abundant compounds in the aliphatic hydrocarbon, ketone and alcohol fractions of the sediment extract.
A specific diagenetic reaction involves the conversion of taraxer-14-ene into olean-12-ene in the upper 700 metres of the sedimentary sequence. The taraxerene-to-oleanene conversion is complete before the onset of isomerisation of diasterenes at C-20. In the sediment as well as in laboratory simulation experiments, olean-12-ene further isomerises to olean-13(18)-ene and olean-18-ene, the latter of which may be the direct precursor of 18beta(H)- and 18alpha(H)-oleanane found in sediments containing more mature organic matter and in crude oils. The subsurface interconversion of these triterpenoid skeletons indicate that oleanane does not necessarily start life as an oleanoid.
Project(s):
Ocean Drilling Program (ODP)
Coverage:
Median Latitude: 70.457467 * Median Longitude: -64.655167 * South-bound Latitude: 70.457200 * West-bound Longitude: -64.656200 * North-bound Latitude: 70.458000 * East-bound Longitude: -64.654300
Date/Time Start: 1985-09-05T13:25:00 * Date/Time End: 1985-09-27T20:30:00
Minimum DEPTH, sediment/rock: 43.6 m * Maximum DEPTH, sediment/rock: 1125.8 m
Event(s):
105-645B * Latitude: 70.457200 * Longitude: -64.654300 * Date/Time Start: 1985-09-05T13:25:00 * Date/Time End: 1985-09-10T01:25:00 * Elevation: -2019.0 m * Penetration: 298.9 m * Recovery: 171.68 m * Location: Baffin Bay * Campaign: Leg105 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 32 cores; 298.3 m cored; 0 m drilled; 57.6 % recovery
105-645D * Latitude: 70.457200 * Longitude: -64.656200 * Date/Time Start: 1985-09-10T12:00:00 * Date/Time End: 1985-09-13T17:00:00 * Elevation: -2018.0 m * Penetration: 465.8 m * Recovery: 106.84 m * Location: Baffin Bay * Campaign: Leg105 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 20 cores; 190.4 m cored; 0 m drilled; 56.1 % recovery
105-645E * Latitude: 70.458000 * Longitude: -64.655000 * Date/Time Start: 1985-09-13T17:00:00 * Date/Time End: 1985-09-27T20:30:00 * Elevation: -2018.0 m * Penetration: 1147.1 m * Recovery: 535.57 m * Location: Baffin Bay * Campaign: Leg105 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 78 cores; 720.9 m cored; 0 m drilled; 74.3 % recovery
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | ||||
| 2 | DEPTH, sediment/rock | Depth sed | m | Geocode | ||
| 3 | Sample code/label | Sample label | ten Haven, H Lo | DSDP/ODP/IODP sample designation | ||
| 4 | Epoch | Epoch | ten Haven, H Lo | |||
| 5 | Carbon, organic, total | TOC | % | ten Haven, H Lo | Carbon analyser, LECO | |
| 6 | Hydrogen index, mass HC, per unit mass total organic carbon | HI, HC/TOC | mg/g | ten Haven, H Lo |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
88 data points
Data
| 1 Event | 2 Depth sed [m] | 3 Sample label | 4 Epoch | 5 TOC [%] | 6 HI, HC/TOC [mg/g] |
|---|---|---|---|---|---|
| 105-645B | 43.6 | 105-645B-06-1,96-98 | Pleistocene | 0.31 | 78 |
| 105-645B | 272.2 | 105-645B-29-6,11-16 | Late Pliocene | 1.08 | 109 |
| 105-645D | 395.7 | 105-645D-13-5,107-113 | Pliocene | 0.97 | 97 |
| 105-645E | 481.0 | 105-645E-06-5,94 | Pliocene | 0.84 | 49 |
| 105-645E | 490.8 | 105-645E-07-5,68-71 | Pliocene | 1.18 | 265 |
| 105-645E | 499.9 | 105-645E-08-5,21 | Pliocene | 1.22 | 88 |
| 105-645E | 548.4 | 105-645E-13-5,64-69 | ? | 1.40 | 191 |
| 105-645E | 576.5 | 105-645E-16-5,99 | ? | 1.08 | 106 |
| 105-645E | 591.4 | 105-645E-18-1,129-134 | ? | 1.41 | 159 |
| 105-645E | 605.2 | 105-645E-19-4,92 | ? | 0.38 | 102 |
| 105-645E | 613.7 | 105-645E-20-3,140-145 | ? | 0.83 | 144 |
| 105-645E | 626.9 | 105-645E-22-2,86 | ? | 0.96 | 96 |
| 105-645E | 649.4 | 105-645E-25-2,30-33 | ? | 0.69 | 159 |
| 105-645E | 728.9 | 105-645E-34-4,4-6 | ? | 0.81 | 215 |
| 105-645E | 738.6 | 105-645E-35-4,15 | Early Pliocene / Middle Miocene | 1.11 | 112 |
| 105-645E | 760.0 | 105-645E-37-5,63 | Early Pliocene / Middle Miocene | 1.08 | 105 |
| 105-645E | 766.5 | 105-645E-38-3,47 | Early Pliocene / Middle Miocene | 0.99 | 95 |
| 105-645E | 778.1 | 105-645E-39-4,104 | Early Pliocene / Middle Miocene | 1.11 | 116 |
| 105-645E | 941.7 | 105-645E-57-4,99 | Late Miocene / Middle Miocene | 0.83 | 84 |
| 105-645E | 1010.8 | 105-645E-64-5,94 | Middle Miocene / Early Miocene | 1.47 | 88 |
| 105-645E | 1076.9 | 105-645E-71-4,133 | Middle Miocene / Early Miocene | 0.81 | 80 |
| 105-645E | 1125.8 | 105-645E-77-5,100 | Middle Miocene / Late Oligocene | 0.66 | 113 |