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| Format: | Dataset Open Access |
| Language: | en |
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PANGAEA
1984
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| Online Access: | https://doi.org/10.1594/PANGAEA.810236 |
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| _version_ | 1867172327114932224 |
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| author | Nohara, Masato Ishizuka, Toshio Gieskes, Joris M |
| author_facet | Nohara, Masato Ishizuka, Toshio Gieskes, Joris M |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | 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. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_810236 |
| institution | PANGAEA |
| language | en |
| publishDate | 1984 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | (Table 1) Organic carbon isotopic composition in Cretaceous sediments at DSDP Hole 75-530A Nohara, Masato Ishizuka, Toshio Gieskes, Joris M 75-530A; Carbon, organic, total; Deep Sea Drilling Project; DRILL; Drilling/drill rig; DSDP; DSDP/ODP/IODP sample designation; Glomar Challenger; Leg75; Lithology/composition/facies; Mass spectrometer Varian MAT 250; Sample code/label; see reference(s); South Atlantic/RIDGE; Stage; δ13C, organic carbon 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. |
| title | (Table 1) Organic carbon isotopic composition in Cretaceous sediments at DSDP Hole 75-530A |
| topic | 75-530A; Carbon, organic, total; Deep Sea Drilling Project; DRILL; Drilling/drill rig; DSDP; DSDP/ODP/IODP sample designation; Glomar Challenger; Leg75; Lithology/composition/facies; Mass spectrometer Varian MAT 250; Sample code/label; see reference(s); South Atlantic/RIDGE; Stage; δ13C, organic carbon |
| url | https://doi.org/10.1594/PANGAEA.810236 |