Gruetzner, J. and Mienert, J. (1999): Lateral changes of mass accumulation rates derived from seismic reflection profiles; an example from the Western Atlantic
Leg/Site/Hole:
Related Expeditions:
Identifier:
ID:
2000-020963
Type:
georefid
Creator:
Name:
Gruetzner, J.
Affiliation:
GEOMAR, Forschungszentrum fuer Marine Geowissenschaften, Kiel, Federal Republic of Germany
Role:
author
Name:
Mienert, J.
Affiliation:
Alfred-Wegener-Institute for Polar and Marine Research, Federal Republic of Germany
Role:
author
Identification:
Title:
Lateral changes of mass accumulation rates derived from seismic reflection profiles; an example from the Western Atlantic
Year:
1999
Source:
In: Bruns, P. (editor), Hass, H. C. (editor), On the determination of sediment accumulation rates
Publisher:
Trans Tech Publications, Zurich, Switzerland
Volume:
5
Issue:
Pages:
87-107
Abstract:
Lateral changes of mass accumulation rates (MAR) can be calculated and mapped only in areas where well dated seismic horizons have been identified in seismic reflection profiles. We demonstrate a method of deriving MAR from seismics using a suite of profiles from the western Atlantic (30-40 degrees N, 65-80 degrees W) where prominent isochronous reflectors have been identified. The uncertainty of the MAR calculations is higher in deeper burial depth and for thinner layers. Mass accumulation rates vary through time from 500 g (super *) cm (super -2*) my (super -1) for Upper Cretaceous sedimentation below the CCD up to more than 100000 g (super *) cm (super -2*) my (super -1) for Pliocene turbidite sedimentation at the continental slope. Furthermore MAR in the study area are controlled by contour currents, tectonics, and sea level fluctuations. Following the individual horizons from the margin to the Western Bermuda Rise lateral variations in MAR of more than 300% have been found.
Language:
English
Genre:
Serial
Rights:
URL:
Coverage: Geographic coordinates: North:40.0000 West:-80.0000 East:
-65.0000 South:30.0000
Keywords: Sedimentary petrology; Applied geophysics; Atlantic Ocean; Bermuda Rise; carbonate compensation depth; cartography; Cenozoic; continental slope; cores; correlation; Cretaceous; Deep Sea Drilling Project; density; geophysical profiles; geophysical surveys; isochrons; magnetic anomalies; Mesozoic; Neogene; North Atlantic; Ocean Drilling Program; Pliocene; porosity; reflection; sea-level changes; sedimentation; sedimentation rates; seismic profiles; surveys; Tertiary; turbidite; Upper Cretaceous; West Atlantic; western Bermuda Rise;
.