Magnetostratigraphic age-depth tie points of ODP Leg 208 sites
Cobertura |
MEDIAN LATITUDE: -28.287811 * MEDIAN LONGITUDE: 2.315958 * SOUTH-BOUND LATITUDE: -28.835017 * WEST-BOUND LONGITUDE: 1.577000 * NORTH-BOUND LATITUDE: -27.185833 * EAST-BOUND LONGITUDE: 2.845483 * DATE/TIME START: 2003-03-24T00:00:00 * DATE/TIME END: 2003-04-26T00:00:00 |
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Data(s) |
17/02/2006
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Resumo |
We report the paleomagnetic and rock magnetic results from discrete sample analysis of sediments from Walvis Ridge, Leg 208 of the Ocean Drilling Program. In an effort to refine the shipboard magnetostratigraphy, alternating field and thermal demagnetization of discrete samples were carried out, predominantly on samples from Sites 1262 and 1267. Results are generally consistent with the shipboard pass-through cryomagnetometer data, though in some cases the discrete samples resolved ambiguities in the reversal record. Significantly, the C24r/C24n reversal boundary was identified at Sites 1262 and 1267, and most boundaries in the Paleocene and Upper Cretaceous sections are now identified to within 10-30 cm. Magnetic mineralogy results show that prior to the late Miocene, the predominant detrital magnetic component was coarse-grained magnetite and that after the late Miocene, titanomagnetite has also been present. This suggests a possible change in detrital source at that time. |
Formato |
application/zip, 6 datasets |
Identificador |
https://doi.pangaea.de/10.1594/PANGAEA.776196 doi:10.1594/PANGAEA.776196 |
Idioma(s) |
en |
Publicador |
PANGAEA |
Direitos |
CC-BY: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted |
Fonte |
Supplement to: Bowles, Julie (2006): Data report: Revised magnetostratigraphy and magnetic mineralogy of sediments from Walvis Ridge, Leg 208. In: Kroon, D., Zachos, J.C., and Richter, C. (Eds.), Proceedings of the Ocean Drilling Program, Scientific Results, 208: College Station, TX (Ocean Drilling Program), 208, 1-24, doi:10.2973/odp.proc.sr.208.206.2006 |
Palavras-Chave | #208-1262; 208-1263; 208-1264; 208-1265; 208-1266; 208-1267; Age model; Age model, ATNTS2004, Lourens et al., 2004; Age model, GPTS (geomagnetic polarity timescale), Cande and Kent (1995); Age model, optional; Age model opt; bottom; Chronozone; COMPCORE; Composite Core; Depth; Depth, bottom/max; Depth, composite bottom; Depth, composite top; DEPTH, sediment/rock; Depth, top/min; Depth bot; Depth c bot; Depth c top; Depth top; Joides Resolution; Label 2; Leg208; o = onset, t = termination; * = new and/or revised boundaries compared to Zachos et al. (2004, doi:10.2973/odp.proc.ir.208.2004); Chron C13n (t) and (o) are a lower confidence picks; o = onset, t = termination; * = new and/or revised boundaries compared to Zachos et al. (2004, doi:10.2973/odp.proc.ir.208.2004); Chrons C1n-C12n are lower confidence picks; o = onset, t = termination; * = new and/or revised boundaries compared to Zachos et al. (2004, doi:10.2973/odp.proc.ir.208.2004); Chrons C20n (t)-C21n are lower confidence picks; o = onset, t = termination; all boundaries are lower confidence picks; Ocean Drilling Program; ODP; ODP sample designation; Sample code/label; Sample code/label 2; South Atlantic Ocean; top; Walvis Ridge, Southeast Atlantic Ocean |
Tipo |
Dataset |