Age determination of Paleogene sediments from the Prysz Bay
| Cobertura |
MEDIAN LATITUDE: -67.162000 * MEDIAN LONGITUDE: 74.951367 * SOUTH-BOUND LATITUDE: -67.285000 * WEST-BOUND LONGITUDE: 74.690500 * NORTH-BOUND LATITUDE: -66.916000 * EAST-BOUND LONGITUDE: 75.081800 * DATE/TIME START: 1988-01-18T00:00:00 * DATE/TIME END: 1988-02-03T20:00:00 |
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| Data(s) |
10/03/1991
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| Resumo |
Age dating of Paleogene diamictites from ODP Site 739 in Prydz Bay with marine microfossils (diatoms and calcareous nannofossils) suggests the build-up of a major East Antarctic ice shield in latest Eocene to earliest Oligocene time, about 35-38 m.y. ago. Strontium isotopic analyses of small mollusk remains found within these diamictites, however, yield younger ages ranging from 29 to 23 Ma (i.e., latest early Oligocene to earliest Miocene). These age discrepancies could be caused by repeated glacial reworking of microfossils, macrofossils, and sediment clasts through the late Oligocene or, alternatively, by ion exchange in the still aragonitic mollusk shells. |
| Formato |
application/zip, 3 datasets |
| Identificador |
https://doi.pangaea.de/10.1594/PANGAEA.758206 doi:10.1594/PANGAEA.758206 |
| Idioma(s) |
en |
| Publicador |
PANGAEA |
| Direitos |
CC-BY: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted |
| Fonte |
Supplement to: Thierstein, Hans R; MacDougall, J Douglas; Martin, Ellen E; Larsen, Birger; Barron, John A; Baldauf, Jack G (1991): Age determinations of Paleogene Diamictites from Prydz Bay (Site 739), Antarctica, using sr isotopes of mollusks and biostratigraphy of microfossils (diatoms and coccoliths). In: Barron, J; Larsen, B; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 119, 739-745, doi:10.2973/odp.proc.sr.119.178.1991 |
| Palavras-Chave | #119-739; 119-739C; 119-743A; 87Sr/86Sr; 87Sr/86Sr e; Age model; COMPCORE; Composite Core; d13C; d18O; delta 13C; delta 18O; Depth; DEPTH, sediment/rock; DRILL; Drilling/drill rig; Event; fill; Joides Resolution; Label; Leg119; Matrix descr; Matrix description; Minerals; Ocean Drilling Program; ODP; ODP sample designation; Prydz Bay; Samp com; Sample code/label; Sample comment; Sample ID; Sediment; Sediment type; Shell debris; Shells; Sr; Strontium; Strontium 87/Strontium 86, error; Strontium 87/Strontium 86 ratio; vs. PDB |
| Tipo |
Dataset |
