Lowell, Robert P. and Stephen, Ralph A. (1991): Heat-flow and lateral seismic-velocity heterogeneities near Deep Sea Drilling Project-Ocean Drilling Program Site 504
Leg/Site/Hole:
Related Expeditions:
ODP 111
Identifier:
ID:
1991-047323
Type:
georefid
ID:
10.1130/0091-7613(1991)019<1141:HFALSV>2.3.CO;2
Type:
doi
Creator:
Name:
Lowell, Robert P.
Affiliation:
Ga. Inst. Technol., Sch. Earth and Atmos. Sci., Atlanta, GA, United States
Role:
author
Name:
Stephen, Ralph A.
Affiliation:
Woods Hole Oceanogr. Inst., United States
Role:
author
Identification:
Title:
Heat-flow and lateral seismic-velocity heterogeneities near Deep Sea Drilling Project-Ocean Drilling Program Site 504
Year:
1991
Source:
Geology (Boulder)
Publisher:
Geological Society of America (GSA), Boulder, CO, United States
Volume:
19
Issue:
11
Pages:
1141-1144
Abstract:
Both conductive heat-flow and seismic-velocity data contain information relating to the permeability of the oceanic crust. Deep Sea Drilling Project-Ocean Drilling Program Site 504 is the only place where both detailed heat-flow and seismic-velocity field studies have been conducted at the same scale. In this paper we examine the correlation between heat flow and lateral heterogeneities in seismic velocity near Site 504. Observed heterogeneities in seismic velocity, which are thought to be related to variations in crack density in the upper 500 m of the basaltic crust, show little correlation with the heat-flow pattern. This lack of correlation highlights some of the current difficulties in using seismic-velocity data to infer details of spatial variations in permeability that are significant in controlling hydrothermal circulation.
Language:
English
Genre:
Serial
Rights:
URL:
Coverage: Geographic coordinates: North:1.1335 West:-83.4356 East:
-83.4356 South:1.1335
Keywords: Solid-earth geophysics; Oceanography; Applied geophysics; body waves; boreholes; crust; Deep Sea Drilling Project; DSDP Site 504; East Pacific; elastic waves; Equatorial Pacific; fractures; geophysical surveys; heat flow; IPOD; lateral heterogeneity; Leg 111; Leg 137; Leg 140; Leg 148; Leg 69; Leg 70; Leg 83; Leg 92; mechanical properties; Ocean Drilling Program; oceanic crust; P-waves; Pacific Ocean; permeability; seismic logging; seismic waves; South American Pacific; South Pacific; Southeast Pacific; surveys; tectonophysics; thermomechanical properties; velocity structure; well-logging;
.