(Table 2) Physical properties at DSDP Holes 44-391 and 76-534


Autoria(s): Shipley, Thomas H
Cobertura

MEDIAN LATITUDE: 28.286050 * MEDIAN LONGITUDE: -75.497200 * SOUTH-BOUND LATITUDE: 28.228800 * WEST-BOUND LONGITUDE: -75.612700 * NORTH-BOUND LATITUDE: 28.343300 * EAST-BOUND LONGITUDE: -75.381700 * DATE/TIME START: 1975-09-02T00:00:00 * DATE/TIME END: 1980-10-21T00:00:00 * MINIMUM DEPTH, sediment/rock: 0.0 m * MAXIMUM DEPTH, sediment/rock: 1635.3 m

Data(s)

10/04/1983

Resumo

Laboratory measurements on sediment samples and density well logs run at DSDP Site 534 in the Blake-Bahama Basin were used to establish an in situ velocity and density structure. Synthetic seismograms were generated for comparison to reprocessed seismic reflection data in the vicinity of the Site. Uncertainties in the relative positions of the hole and seismic reflection data, velocity corrections, and the composition of the unrecovered section were evaluated. In light of the errors and compressed section, no unique correlation of the seismic reflection data to the drill hole is completely defensible either in this chapter or elsewhere. The preferred correlation resulting from this exercise is as follows, with the Site 534 report correlation shown in parentheses where different. Horizon beta', 887 m; Horizon beta, 950 m (975 m); Horizon C , 1202 m (1250 m); Horizon C, 1268 m (1340 m); Horizon D', 1342 m (1432 m); Horizon D, 1550 m (1552 m). The major differences in these correlations arise from the use of slightly different velocities and hole location relative to the seismic profiles. The Site 534 report results rely on hole placement on a basement flank, whereas in this chapter we locate it within a basement depression still within the uncertainty of the navigation. The Site 534 report also uses drilling rates, CDP velocity analyses, sonobuoy data, and previous similar drilling correlation methods used at Site 391, along with other geologic considerations in arriving at differing results. Although the correlation method used in this investigation is more objective and the hole location uncertainties better defined, in order to have confidence in any results we will require drilling in areas where reflections are either more widely spaced or where we have better vertical velocity control in the hole.

Formato

text/tab-separated-values, 518 data points

Identificador

https://doi.pangaea.de/10.1594/PANGAEA.809942

doi:10.1594/PANGAEA.809942

Idioma(s)

en

Publicador

PANGAEA

Direitos

CC-BY: Creative Commons Attribution 3.0 Unported

Access constraints: unrestricted

Fonte

Supplement to: Shipley, Thomas H (1983): Physical properties, synthetic seismograms, and seismic reflections: correlations at Deep Sea Drilling Project Site 534, Blake-Bahama Basin. In: Sheridan, RE; Gradstein, FM; et al. (eds.), Initial Reports of the Deep Sea Drilling Project (U.S. Govt. Printing Office), 76, 653-666, doi:10.2973/dsdp.proc.76.129.1983

Palavras-Chave #44-391; 76-534; Deep Sea Drilling Project; Density, wet bulk; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP; Event label; Glomar Challenger; Leg44; Leg76; Lithologic unit/sequence; Lithology/composition/facies; North Atlantic/BASIN; Percentage; Porosity; see reference(s); Velosity, vertical
Tipo

Dataset