Accession Number : ADA319279

Title :   Implications of Fine-Scale Magnetics for the Structure and Evolution of Slowly Accreted Oceanic Crust.

Descriptive Note : Final rept. 1 Feb 94-31 May 96,

Corporate Author : WOODS HOLE OCEANOGRAPHIC INSTITUTION MA DEPT OF GEOLOGY AND GEOPHYSICS

Personal Author(s) : Tivey, Maurice A.

PDF Url : ADA319279

Report Date : 02 JAN 1997

Pagination or Media Count : 4

Abstract : The long range objective of this program is to understand the structure of oceanic crust created at slow-spreading ridges by investigating the patterns of magnetization that reside in the crust. The project seeks to investigate how crustal magnetic fields are related to the structural deformation history of oceanic crust formed in slow spreading environments and how magnetization may be used to predict the properties of the underlying crust. Scientific Objectives are: (1) Investigate the relationship between crustal magnetization and the tectonic structure and architecture of oceanic crust by comparing the magnetization patterns of crust created at 'inside corners' versus 'outside corners' of ridge segment offsets. (2) Investigate the relationship between crustal magnetization and cyclic magmatic and tectonic processes involved in crustal formation and how this magnetization signal varies with age. (3) Investigate along-axis variability in crustal magnetization within a ridge segment and compare with the ridge axis signal. (4) Map magnetic isochrons to provide temporal framework for other related studies e.g. investigate how crustal structure and seafloor morphology change with spreading rate.

Descriptors :   *MAGNETIZATION, *SEDIMENTATION, *OCEANIC CRUST, MAGNETIC FIELDS, STRUCTURAL PROPERTIES, MORPHOLOGY, LONG RANGE(TIME), PATTERNS, OCEAN BOTTOM, OCEAN RIDGES, TECTONICS.

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

Distribution Statement : APPROVED FOR PUBLIC RELEASE