Composition of Lower Cretaceous sandstones of the Galicia margin
| Cobertura |
MEDIAN LATITUDE: 42.093544 * MEDIAN LONGITUDE: -12.309736 * SOUTH-BOUND LATITUDE: 42.016700 * WEST-BOUND LONGITUDE: -12.463300 * NORTH-BOUND LATITUDE: 42.155000 * EAST-BOUND LONGITUDE: -12.181700 * DATE/TIME START: 1985-05-06T00:15:00 * DATE/TIME END: 1985-06-15T13:30:00 |
|---|---|
| Data(s) |
04/08/1988
|
| Resumo |
The composition of 31 samples of Lower Cretaceous (Valanginian to Aptian) sandstone from ODP Sites 638 through 641 was analyzed using the Gazzi-Dickinson point-counting method. The results show that the source of the Valanginian to Hauterivian sand was a continental block, dominated by granitic and/or high-grade-metamorphic rocks. Although these petrologic results do not allow discrimination between various potential continental block provinces, they suggest, in conjunction with seismic profiles and regional considerations, that the source was the Galicia margin or western Iberia. In contrast, the Barremian and Aptian sand is dominated by carbonate grains that were derived from a carbonate platform, probably on Galicia Bank. |
| Formato |
application/zip, 2 datasets |
| Identificador |
https://doi.pangaea.de/10.1594/PANGAEA.743858 doi:10.1594/PANGAEA.743858 |
| Idioma(s) |
en |
| Publicador |
PANGAEA |
| Direitos |
CC-BY: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted |
| Fonte |
Supplement to: Johnson, Jeffrey A (1988): Composition of Lower Cretaceous sandstone, Galicia margin. In: Boillot, G; Winterer, EL; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 103, 505-512, doi:10.2973/odp.proc.sr.103.127.1988 |
| Palavras-Chave | #103-638B; 103-638C; 103-639D; 103-640A; 103-641C; Carb; Carb frac; Carbonate, fractionated; Carbonates; DRILL; Drilling/drill rig; Event; Feldspar; Fels fragm; Felsitic fragments; Fragm; Fragments; framework replacement carbonate; Fsp; Joides Resolution; Kalifeldspar; Kfs; Label; Lathwork; Lathwork fragments; Leg103; Lithic fragments; Metasediments; Metavolcanic; Metavolcanic fragments; Microlitic; Microlitic fragments; Microlitic volcanic lithic fragments; Min dense; Minerals, dense; MonoQz; nontectonite; North Atlantic Ocean; Ocean Drilling Program; ODP; ODP sample designation; of carbonate lithic fragments to total lithic fragments (volcanic, metamorphic, and sedimentary); of total metavolcanic and metasedimentary lithic fragments to total metamorphic and sedimentary lithic fragments; Organic remains; Org rem; Phyllosilicate; Pl; Pl/Fsp; Plagioclase; Plagioclase/Feldspar ratio; PolyQz; PolyQz/Qz; Quartz; Quartz, monocrystalline; Quartz, polycrystalline; Quartz, polycrystalline/quartz, total ratio; Qz; Ratio; Sample code/label; Sed fragm; Sedimentary fragments; Sedimentary lithic fragments; Shell debris; Shells; Siliciclast; Siliciclastics; Stage; tectonite; Vitric; Vitric fragments; volcanic; Volcanic fragments; Volcanic lithic fragments; Volc fragm |
| Tipo |
Dataset |
