Setoyama, Eiichi; Greb, Matthias; Garel, Sylvain; Beti, Dhrupad; Kanungo, Sudeep: Pyrolysis data of South Atlantic source rocks from 20 DSDP-ODP sites: Insight on source-rock potential [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.907697 (dataset in review)
Abstract:
This data set consists of analytical results from the HAWK Pyrolysis and TOC instrument for 161 bulk samples from Mesozoic to Cenozoic strata at 20 DSDP-ODP sites in the South Atlantic region, from the Weddell Sea in the south to the Demerara Rise in the north, and in the Mozambique Ridge. Based on a revised chronostratigraphic and paleoenvironment framework (Setoyama and Kanungo, submitted), our pyrolysis results, combined with data published by previous studies, allow us to identify seven Mesozoic source-rock intervals: two in the Southern South Atlantic (SA), one in the Central SA and four in the Equatorial SA. Furthermore, these data also provide an estimate of the source-rock potential and quality of the identified intervals, which are influenced by depositional environments. A significant portion of the pyrolysis data is affected by the mineral matrix effect (MME) that artificially lowers the estimated potential and quality of source rocks. Further analyses are therefore required to correct the MME and for the proper identification of organic matter to ensure the reliable determination of organofacies, thereby facilitating improved source rock system evaluation.
Related to:
Setoyama, Eiichi; Greb, Matthias; Garel, Sylvain; Beti, Dhrupad; Kanungo, Sudeep (in prep.): The Mesozoic development of organic-matter-rich sediments and their distribution in the South Atlantic. Marine and Petroleum Geology
Project(s):
Deep Sea Drilling Project (DSDP)
Ocean Drilling Program (ODP)
Coverage:
Median Latitude: -25.268571 * Median Longitude: -20.345551 * South-bound Latitude: -70.832000 * West-bound Longitude: -54.732760 * North-bound Latitude: 9.453830 * East-bound Longitude: 36.077000
Date/Time Start: 1970-11-23T00:00:00 * Date/Time End: 2003-02-01T07:50:00
Minimum DEPTH, sediment/rock: 13.60 m * Maximum DEPTH, sediment/rock: 1268.62 m
Event(s):
14-144 * Latitude: 9.453800 * Longitude: -54.342000 * Date/Time: 1970-11-23T00:00:00 * Elevation: -2957.0 m * Penetration: 327 m * Recovery: 28 m * Location: North Atlantic/CONT RISE * Campaign: Leg14 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 8 cores; 40 m cored; 0 m drilled; 70 % recovery
25-249 * Latitude: -29.949800 * Longitude: 36.077000 * Date/Time: 1972-08-18T00:00:00 * Elevation: -2098.0 m * Penetration: 412 m * Recovery: 221.4 m * Location: Indian Ocean//RIDGE * Campaign: Leg25 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 33 cores; 285 m cored; 0 m drilled; 77.7 % recovery
36-327A * Latitude: -50.871300 * Longitude: -46.783700 * Date/Time: 1974-04-13T00:00:00 * Elevation: -2400.0 m * Penetration: 469.5 m * Recovery: 132.4 m * Location: South Atlantic/PLATEAU * Campaign: Leg36 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 27 cores; 256.5 m cored; 0 m drilled; 51.6 % recovery
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | Setoyama, Eiichi | |||
| 2 | Latitude of event | Latitude | Setoyama, Eiichi | |||
| 3 | Longitude of event | Longitude | Setoyama, Eiichi | |||
| 4 | Sample code/label | Sample label | Setoyama, Eiichi | DSDP/ODP/IODP sample designation | ||
| 5 | DEPTH, sediment/rock | Depth sed | m | Setoyama, Eiichi | Geocode – mbsf | |
| 6 | Carbon, organic, total | TOC | % | Setoyama, Eiichi | HAWK Pyrolysis | |
| 7 | Hydrocarbon yield, S1 per unit sediment mass | S1 HC/sed | mg/g | Setoyama, Eiichi | HAWK Pyrolysis | |
| 8 | Hydrocarbon yield, S2 per unit sediment mass | S2 HC/sed | mg/g | Setoyama, Eiichi | HAWK Pyrolysis | |
| 9 | Carbon dioxide yield, S3 per unit sediment mass | S3 CO2/sed | mg/g | Setoyama, Eiichi | HAWK Pyrolysis | |
| 10 | Pyrolysis temperature maximum | Tmax | °C | Setoyama, Eiichi | HAWK Pyrolysis | |
| 11 | Hydrogen index, mass HC, per unit mass total organic carbon | HI, HC/TOC | mg/g | Setoyama, Eiichi | HAWK Pyrolysis | |
| 12 | Oxygen index, mass CO2, per unit mass total organic carbon | OI, CO2/TOC | mg/g | Setoyama, Eiichi | HAWK Pyrolysis |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0) (License comes into effect after moratorium ends)
Size:
1288 data points