High-resolution bathymetry of the East Pacific Rise axial summit trough 9°49'-51'N: A compilation of Alvin scanning sonar and altimetry data from 1991-1995

Details High-resolution bathymetry of the East Pacific Rise axial summit trough 9°49'-51'N: A compilation of Alvin scanning sonar and altimetry data from 1991-1995 High-resolution bathymetry of the East Pacific Rise axial summit trough 9°49'-51'N: A compilation of Alvin scanning sonar and altimetry data from 1991-1995

Apr 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998georl..25.1209k&link_type=abstract

Geophysical Research Letters, Volume 25, Issue 8, p. 1209-1212

Physics

Geophysics

3

Marine Geology And Geophysics: Midocean Ridge Processes, Marine Geology And Geophysics: Seafloor Morphology And Bottom Photography, Marine Geology And Geophysics: Instruments And Techniques

Scientific paper

Bathymetric data acquired during six cruises to the East Pacific Rise crest 9°49'-51'N are compiled into a single bathymetric database and used to create high-resolution bathymetry maps of two geologically and biologically active areas. Scanning sonar and Alvin altimetry were collected during 23 Alvin dives to the P-vent/Bio9 and Biomarker-141 areas during 1991-95. Bathymetry data were filtered, edited, and processed as individual dives then combined into a single database for each cruise and statistically evaluated. Cruise data sets were numerically and visually compared and cross-correlated to known bottom features and fixed seafloor reference markers, then horizontally shifted to establish a consistent database with 3 m vertical and 5 m horizontal resolutions. The compiled and corrected bathymetry was used to produce bathymetric maps of two areas within the axial summit collapse trough; a 2×104m2 area around P and Bio9 vents, and a 1.1×103m2 area around Biomarker 141. The resulting detailed bathymetry maps reveal topography dominated by low-relief volcanic constructional features and post-eruptive collapse of lobate and sheet lava surfaces.

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