Not logged in
PANGAEA.
Data Publisher for Earth & Environmental Science

Nohara, Masato; Ishizuka, Toshio; Gieskes, Joris M (1984): (Table 1) Organic carbon isotopic composition in Cretaceous sediments at DSDP Hole 75-530A [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.810236, Supplement to: Nohara, M et al. (1984): Organic carbon isotopic composition in Cretaceous sediments, Angola Basin, southeastern Atlantic, Deep Sea Drilling Project Site 530. In: Hay, WW; Sibuet, J-C; et al. (eds.), Initial Reports of the Deep Sea Drilling Project (U.S. Govt. Printing Office), 75, 1051-1054, https://doi.org/10.2973/dsdp.proc.75.136.1984

Always quote citation above when using data! You can download the citation in several formats below.

RIS CitationBibTeX CitationShow MapGoogle Earth

Abstract:
Cretaceous sediments from DSDP Site 530 have been analyzed for organic carbon isotopic composition. The d13C values in the sediments decrease from -22.7 per mil to -27.5 per mil in the following order: light-olive green mudstone/claystone, dark brown-red mudstone/siltstone/claystone, and black shale. This large range is primarily the result of variation in the relative amounts of terrestrial organic carbon superimposed on that derived from marine organisms.
The black shales have an average d13C value of -25.9 per mil (range is from -23.7 per mil to -27.5 per mil). These values indicate that they originated primarily in terrigenous organic materials.
The average d13C value present throughout the Cretaceous suggests that a large amount of terrestrial organic matter was supplied into this paleoenvironment, except during the Campanian, when an average d13C of -23.9 per mil is found near the marine end of the range.
Project(s):
Coverage:
Latitude: -19.187700 * Longitude: 9.385800
Date/Time Start: 1980-07-29T00:00:00 * Date/Time End: 1980-07-29T00:00:00
Minimum Elevation: -4629.0 m * Maximum Elevation: -4629.0 m
Event(s):
75-530A * Latitude: -19.187700 * Longitude: 9.385800 * Date/Time: 1980-07-29T00:00:00 * Elevation: -4629.0 m * Penetration: 1121 m * Recovery: 617.5 m * Location: South Atlantic/RIDGE * Campaign: Leg75 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 107 cores; 986.5 m cored; 9.5 m drilled; 62.6 % recovery
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
Sample code/labelSample labelNohara, MasatoDSDP/ODP/IODP sample designation
Carbon, organic, totalTOC%Nohara, Masatosee reference(s)
δ13C, organic carbonδ13C Corg‰ PDBNohara, MasatoMass spectrometer Varian MAT 250
StageStageNohara, MasatoRevisions of stratigraphic ages are given in Steinmetz et al., 1984 (doi:10.2973/dsdp.proc.75.105.1984)
Lithology/composition/faciesLithologyNohara, Masato
Size:
176 data points

Data

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


Sample label

TOC [%]

δ13C Corg [‰ PDB]

Stage

Lithology
75-530A-50-4,91-920.06-25.3MaestrichtianGreen mudstone
75-530A-57-1,92-940.10-25.5
75-530A-69-1,67-680.07-24.9CampanianOlive green mudstone
75-530A-72-1,109-1110.05-24.1
75-530A-74-2,20-220.11-22.7
75-530A-78-7,38-430.12-24.2Coniacian-Santonian
75-530A-85-5,92-990.13-23.6Green claystone
75-530A-86-4,118-1270.06-23.9Light green claystone
75-530A-87-1,34-380.11-24.7
75-530A-87-1,58-6021.80-27.5Black shale
75-530A-87-2,148-1500.11-24.6Dark red claystone
75-530A-87-4,25-263.40-26.8Black shale
75-530A-88-1,81-850.10-25.9Dark red claystone
75-530A-88-3,117-1193.38-23.7Black shale
75-530A-91-2,98-1020.11-25.6Dark brown siltstone
75-530A-93-6,50-520.10-24.1
75-530A-93-6,59-631.84-24.4Grayey brown siltstone
75-530A-94-1,129-1390.88-25.3
75-530A-96-1,12-170.13-24.8late Albian-CenomanianBrown claystone
75-530A-96-5,43-501.03-25.9Black shale
75-530A-96-5,50-560.16-24.3Green claystone
75-530A-96-CC4.87-26.5Black shale
75-530A-99-3,89-910.16-24.6Grayey brown claystone
75-530A-99-5,60-610.21-24.8Green claystone
75-530A-99-5,74-751.73-25.6Grayey black shale
75-530A-99-5,145-1502.64-26.6Black shale
75-530A-100-2,147-1501.33-25.3
75-530A-100-3,50-570.22-24.0Green claystone
75-530A-101-3,49-590.27-23.8
75-530A-101-4,20-238.81-26.7Black shale
75-530A-101-5,140-1470.15-24.3Dark brown claystone
75-530A-102-2,0-817.90-26.0Black shale
75-530A-103-3,64-671.18-26.3
75-530A-103-3,67-700.27-25.0Light green mudstone
75-530A-104-1,124-1310.65-25.0Dark brown mudstone/siltstone
75-530A-104-3,94-962.79-25.7
75-530A-104-4,144-1480.63-25.0
75-530A-105-2,97-991.13-24.9Black shale
75-530A-105-2,99-1005.46-26.4
75-530A-102-2,141-1444.26-25.6
75-530A-105-3,4-100.18-23.2Light green mudstone
75-530A-105-3,141-1470.08-25.3Black shale
75-530A-105-5,26-290.12-25.5
75-530A-105-5,146-1500.12-25.5Dark brown mudstone/siltstone
75-530A-105-6,0-10.11-24.7
75-530A-105-6,1-30.11-24.3Light green mudstone
75-530A-105-CC,0-20.12-24.7Dark brown mudstone/siltstone