Accession Number : AD0755455

Title :   A Geophysical Study of the Central Aleutian Arc.

Descriptive Note : Doctoral thesis,

Corporate Author : SCRIPPS INSTITUTION OF OCEANOGRAPHY SAN DIEGO CALIF MARINE PHYSICAL LAB

Personal Author(s) : Grow,John Allen

Report Date : 15 OCT 1972

Pagination or Media Count : 117

Abstract : Seismic reflection, refraction and near bottom geophysical observations were made in the Aleutian trench near 173 degrees W. The near bottom observations showed that the undisturbed sediments which form the base of the trench floor terminate abruptly at the foot of the north slope which appears to be made up of complexly deformed sediments. The most active zone of deformation between the Pacific and North American plates appears to be localized within 1 km of the base of the north slope. No fault-type features were observed on the near bottom geophysical system. Two structural models for the downgoing lithospheric model are proposed. These two models satisfy constraints imposed by gravity, seismic, refraction and earthquake location data. (Author)

Descriptors :   (*OCEAN BOTTOM, *FAULTS(GEOLOGY)), MARINE GEOPHYSICS, LITHOSPHERE, EARTH MODELS, GEOMAGNETISM, GRAVITY, THESES

Subject Categories : Physical and Dynamic Oceanography
      Geology, Geochemistry and Mineralogy

Distribution Statement : APPROVED FOR PUBLIC RELEASE