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Langrock, Uwe; Stein, Ruediger; Lipinski, Marcus; Brumsack, Hans-Jürgen (2003): (Table 1) Organic and inorganic geochemical analysis of Late Jurassic to Early Cretaceous black shale sediments from the Norwegian-Greenland Seaway. PANGAEA, https://doi.org/10.1594/PANGAEA.841464, Supplement to: Langrock, U et al. (2003): Late Jurassic to Early Cretaceous black shale formation and paleoenvironment in high northern latitudes: Examples from the Norwegian-Greenland Seaway. Paleoceanography, 18(3), 1074, https://doi.org/10.1029/2002PA000867

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Abstract:
The Late Jurassic to Early Cretaceous (Volgian-Ryazanian) was a period of a second-order sea-level low stand, and it provided excellent conditions for the formation of shallow marine black shales in the Norwegian-Greenland Seaway (NGS). IKU Petroleum Research drilling cores taken offshore along the Norwegian shelf were investigated with geochemical and microscopic approaches to (1) determine the composition of the organic matter, (2) characterize the depositional environments, and (3) discuss the mechanisms which may have controlled production, accumulation, and preservation of the organic matter. The black shale sequences show a wide range of organic carbon contents (0.5-7.0 wt %) and consist of thermally immature organic matter of type II to II/III kerogen. Rock-Eval pyrolysis revealed fair to very good petroleum source rock potential, suggesting a deposition in restricted shallow marine basins. Well-developed lamination and the formation of autochthonous pyrite framboids further indicate suboxic to anoxic bottom water conditions. In combination with very low sedimentation rates it seems likely that preservation was the principal control on organic matter accumulation. However, a decrease of organic carbon preservation and an increase of refractory organic matter from the Volgian to the Hauterivian are superimposed on short-term variations (probably reflecting Milankovitch cycles). Various parameters indicate that black shale formation in the NGS was gradually terminated by increased oxidative conditions in the course of a sea-level rise.
Coverage:
Median Latitude: 63.313233 * Median Longitude: 9.870867 * South-bound Latitude: 57.811900 * West-bound Longitude: 7.245600 * North-bound Latitude: 68.662700 * East-bound Longitude: 14.163100
Minimum DEPTH, sediment/rock: 23.0 m * Maximum DEPTH, sediment/rock: 180.0 m
Event(s):
IKU-13/1-U-02  * Latitude: 57.811900 * Longitude: 8.203900 * Elevation: -505.0 m * Method/Device: Drilling/drill rig (DRILL)
IKU-6307/07-U-02  * Latitude: 63.465100 * Longitude: 7.245600 * Elevation: -290.0 m * Method/Device: Drilling/drill rig (DRILL)
IKU-6814/04-U-02  * Latitude: 68.662700 * Longitude: 14.163100 * Elevation: -233.0 m * Method/Device: Drilling/drill rig (DRILL)
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
Event labelEvent
Latitude of eventLatitude
Longitude of eventLongitude
Elevation of eventElevationm
DEPTH, sediment/rockDepth sedmGeocode
Depth, top/minDepth topmLangrock, Uwe
Depth, bottom/maxDepth botmLangrock, Uwe
StageStageLangrock, Uwe
Carbon, totalTC%Langrock, UweElement analyser CHN, LECO
10 Nitrogen, totalTN%Langrock, UweElement analyser CHN, LECO
11 Sulfur, totalTS%Langrock, UweElement analyser CHN, LECO
12 Calcium carbonateCaCO3%Langrock, UweCoulomat carbon analyzer
13 Iron oxide, Fe2O3Fe2O3%Langrock, UweX-ray fluorescence (XRF)
14 Carbon, organic, totalTOC%Langrock, UweCoulomat carbon analyzer
15 Hydrogen index, mass HC, per unit mass total organic carbonHI, HC/TOCmg/gLangrock, UweRock eval pyrolysis (Espitalié et al. 1977)
16 Oxygen index, mass CO2, per unit mass total organic carbonOI, CO2/TOCmg/gLangrock, UweRock eval pyrolysis (Espitalié et al. 1977)
17 Pyrolysis temperature maximumTmax°CLangrock, UweRock eval pyrolysis (Espitalié et al. 1977)
18 Hydrocarbon yield, S1 per unit sediment massS1 HC/sedmg/gLangrock, UweRock eval pyrolysis (Espitalié et al. 1977)
19 Hydrocarbon yield, S2 per unit sediment massS2 HC/sedmg/gLangrock, UweRock eval pyrolysis (Espitalié et al. 1977)
20 Carbon dioxide yield, S3 per unit sediment massS3 CO2/sedmg/gLangrock, UweRock eval pyrolysis (Espitalié et al. 1977)
21 Hydrocarbon yield, S2/Carbon dioxide yield, S3S2/S3Langrock, UweRock eval pyrolysis (Espitalié et al. 1977)
22 Production index, S1/(S1+S2)PILangrock, UweRock eval pyrolysis (Espitalié et al. 1977)
23 CommentCommentLangrock, Uwesource rock potential
Size:
267 data points

Data

Download dataset as tab-delimited text — use the following character encoding:


Event

Latitude

Longitude

Elevation [m]

Depth sed [m]

Depth top [m]

Depth bot [m]

Stage

TC [%]
10 
TN [%]
11 
TS [%]
12 
CaCO3 [%]
13 
Fe2O3 [%]
14 
TOC [%]
15 
HI, HC/TOC [mg/g]
16 
OI, CO2/TOC [mg/g]
17 
Tmax [°C]
18 
S1 HC/sed [mg/g]
19 
S2 HC/sed [mg/g]
20 
S3 CO2/sed [mg/g]
21 
S2/S3
22 
PI
23 
Comment
IKU-6814/04-U-02 68.66314.163-23323.0739Barremian3.40.151.08.09.02.458484360.11.51.22.10.07poor/fair
IKU-6814/04-U-0268.66314.163-23341.53944late Hauterivian1.70.043.613.96.00.1772924940.00.10.20.10.08none
IKU-6814/04-U-0268.66314.163-23357.04470Valanginian1.90.062.910.86.60.6112984600.10.60.41.90.11none
IKU-6814/04-U-0268.66314.163-23379.57089Ryazanian2.10.122.34.15.01.6100904230.11.91.21.70.05fair
IKU-6814/04-U-0268.66314.163-233112.589136late Volgian4.30.193.911.67.62.9187354300.35.90.98.70.04fair/good
IKU-6814/04-U-0268.66314.163-233151.5136167middle Volgian4.80.223.910.87.53.5219254290.47.60.919.00.04good/very good
IKU-6814/04-U-0268.66314.163-233179.0167191early Volgian3.70.203.58.45.42.7247224250.36.50.616.40.05good/very good
IKU-6307/07-U-02 63.4657.246-29023.51334Valanginian3.20.041.815.77.80.4561524100.20.80.90.70.17poor
IKU-6307/07-U-0263.4657.246-29042.03450Ryazanian4.70.154.32.86.42.7275664130.38.81.54.90.05good
IKU-6307/07-U-0263.4657.246-29056.05062late Volgian6.30.213.30.84.04.3348494090.714.62.07.30.05very good
IKU-6307/07-U-0263.4657.246-29068.06274middle Volgian6.30.194.51.95.43.9371624060.614.22.46.10.04very good
IKU-6307/07-U-0263.4657.246-29089.574105early Volgian6.80.185.42.86.14.2373994070.816.01.98.50.05very good
IKU-13/1-U-02 57.8128.204-505131.5118145late Volgian1.40.051.04.55.40.844794210.10.40.61.50.20poor
IKU-13/1-U-0257.8128.204-505148.5145152middle Volgian0.80.040.53.68.70.363670.00.00.00.00.56poor
IKU-13/1-U-0257.8128.204-505180.0152208early Volgian1.80.051.09.46.50.710683810.10.10.40.0