Nielsen, Ole Bjorslev; Cremer, Michel; Stein, Ruediger; Thiébault, Francois; Zimmerman, Herman (1989): Sedimentary facies, clay mineralogy and geochemistry of the Paleogene sediments of ODP Site 105-647 [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.745194, Supplement to: Nielsen, OB et al. (1989): Analysis of sedimentary facies, clay mineralogy, and geochemistry of the Paleogene sediments of Site 647, Labrador Sea. In: Srivastava, SP; Arthur, M; Clement, B; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 105, 101-110, https://doi.org/10.2973/odp.proc.sr.105.116.1989
Always quote citation above when using data! You can download the citation in several formats below.
Abstract:
Claystones immediately overlying the early Eocene age ocean-floor basalt, cored at Ocean Drilling Program (ODP) Site 647, underwent hydrothermal and thermal alterations originating from the basalt, which resulted in changes in both the mineralogical and chemical composition of the sediments. Chlorites and higher magnesium and iron concentrations were found in the lowermost sediment sequence. Upcore, changes in the bulk chemical composition of the sediments become smaller, when compensated for variations in the carbonate content originating from biogenic and authigenic components. Chlorite disappears upcore, but still only part of the swelling clay minerals have survived the thermal influence. Thirty meters above the basalt, the clay mineralogy and chemical composition become uniform throughout the Paleogene section. Iron-rich smectites (i.e., nontronitic types), totally dominate the clay mineral assemblage. Biogenic components, responsible for the dominant part of the calcite and cristobalite contents, vary in amount in the upper part, and so do the authigenic carbonate and sulfide contents. Detrital components, such as kaolinite, illite, quartz, and feldspars, make up a very small proportion of the sediment record. The nontronitic smectites are believed to be authigenic, formed by a supply of iron from the continuous formation of ocean-floor basalt in the ridge area that reacted with the detrital and biogenic silicates and alumina silicates.
Project(s):
Ocean Drilling Program (ODP)
Coverage:
Latitude: 53.331300 * Longitude: -45.262000
Date/Time Start: 1985-10-15T00:00:00 * Date/Time End: 1985-10-25T00:00:00
Event(s):
105-647 * Latitude: 53.331300 * Longitude: -45.262000 * Date/Time Start: 1985-10-15T00:00:00 * Date/Time End: 1985-10-25T00:00:00 * Elevation: -3870.0 m * Penetration: 839.3 m * Recovery: 537.8 m * Location: South Atlantic Ocean * Campaign: Leg105 * Basis: Joides Resolution * Method/Device: Composite Core (COMPCORE) * Comment: 86 cores; 819.9 m cored; 0 m drilled; 65.6% recovery
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
6 datasets
Download Data
Datasets listed in this publication series
- Nielsen, OB; Cremer, M; Stein, R et al. (1989): (Table 4) Chemical composition of bulk sediments of ODP Site 105-647. https://doi.org/10.1594/PANGAEA.745191
- Nielsen, OB; Cremer, M; Stein, R et al. (1989): (Table 5) Chemical composition of the noncarbonate mineral content of ODP Site 105-647. https://doi.org/10.1594/PANGAEA.745192
- Nielsen, OB; Cremer, M; Stein, R et al. (1989): (Table 6) Chemical composition of the carbonate- and quartz-free content of ODP Site 105-647. https://doi.org/10.1594/PANGAEA.745193
- Nielsen, OB; Cremer, M; Stein, R et al. (1989): (Table 1) Grain size distribution of ODP Site 105-647. https://doi.org/10.1594/PANGAEA.745188
- Nielsen, OB; Cremer, M; Stein, R et al. (1989): (Table 2) Mineralogy of bulk sediments of ODP Site 105-647. https://doi.org/10.1594/PANGAEA.745189
- Nielsen, OB; Cremer, M; Stein, R et al. (1989): (Table 3) Mineralogy of clay fraction of ODP Site 105-647. https://doi.org/10.1594/PANGAEA.745190