P-wave velocities and applied bed thickness and velocity changes for synthetic seismograms, ODP Leg 188 and Leg 119 sites


Autoria(s): Handwerger, David A; Cooper, Alan K; O'Brien, Philip E; Williams, Trevor; Barr, Samantha R; Dunbar, Robert B; Leventer, Amy; Jarrard, Richard D
Cobertura

MEDIAN LATITUDE: -66.542956 * MEDIAN LONGITUDE: 72.471689 * SOUTH-BOUND LATITUDE: -67.696283 * WEST-BOUND LONGITUDE: 67.218733 * NORTH-BOUND LATITUDE: -64.379583 * EAST-BOUND LONGITUDE: 75.409000 * DATE/TIME START: 1988-01-28T00:00:00 * DATE/TIME END: 2000-02-22T00:00:00

Data(s)

07/05/2004

Resumo

Synthetic seismograms provide a crucial link between lithologic variations within a drill hole and reflectors on seismic profiles crossing the site. In essence, they provide a ground-truth for the interpretation of seismic data. Using a combination of core and logging data, we created synthetic seismograms for Ocean Drilling Program Sites 1165 and 1166, drilled during Leg 188, and Site 742, drilled during Leg 119, all in Prydz Bay, Antarctica. Results from Site 1165 suggest that coring penetrated a target reflector initially thought to represent the onset of drift sedimentation, but the lithologic change across the boundary does not show a change from predrift to drift sediments. The origin of a shallow reflector packet in the seismic line across Site 1166 and a line connecting Sites 1166 and 742 was resolved into its constituent sources, as this reflector occurs in a region of large-scale, narrowly spaced impedance changes. Furthermore, Site 1166 was situated in a fluvio-deltaic system with widely variable geology, and bed thickness changes were estimated between the site and both seismic lines.

Formato

application/zip, 3 datasets

Identificador

https://doi.pangaea.de/10.1594/PANGAEA.780548

doi:10.1594/PANGAEA.780548

Idioma(s)

en

Publicador

PANGAEA

Direitos

CC-BY: Creative Commons Attribution 3.0 Unported

Access constraints: unrestricted

Fonte

Supplement to: Handwerger, David A; Cooper, Alan K; O'Brien, Philip E; Williams, Trevor; Barr, Samantha R; Dunbar, Robert B; Leventer, Amy; Jarrard, Richard D (2004): Synthetic seismograms linking ODP sites to seismic profiles, continental rise and shelf of Prydz Bay, Antarctica. In: Cooper, AK; O'Brien, PE; Richter, C (eds.) Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 188, 1-28, doi:10.2973/odp.proc.sr.188.010.2004

Palavras-Chave #119-742; 150 psi; 188-1165; 188-1166; atmospheric; Change; COMPCORE; Composite Core; cruise where profile was taken; AGSO = Australian Geological Survey Organization; Depth; Depth, reconstructed; DEPTH, sediment/rock; Diff; Difference; Event; index; Indian Ocean; in original velocity; in situ; Joides Resolution; Layer thickness; Leg119; Leg188; Lithologic unit/sequence; logging unit; mbsf; modified, to base of unit; modified lower boundary; Ocean Drilling Program; ODP; of unit; of unit, modified; Prydz Bay; Ratio; Reconstr depth; Samp com; Sample comment; SampleID; Sample ID; TD = total depth; Thickness; thickness change; thickness change in m; to base of unit; Two-way traveltime; TWT; Unit; Velocity, compressional wave; Vp; Vp(in situ)/Vp(150 psi); Vp(in situ)/Vp(atmospheric); Vp(in situ)/Vp(index)
Tipo

Dataset