Accession Number : ADA317610

Title :   Development of a Lithospheric Model and Geophysical Data Base for North Africa.

Descriptive Note : Scientific rept. no. 1,

Corporate Author : TEXAS UNIV AT EL PASO DEPT OF GEOLOGICAL SCIENCES

Personal Author(s) : Doser, D. I. ; Keller, G. R. ; Harder, S. ; Miller, K. C.

PDF Url : ADA317610

Report Date : 19 JUL 1996

Pagination or Media Count : 45

Abstract : We have collected seismic, geologic, gravity and other potential field data to develop a model of the North African lithosphere via an integrated approach. We have constructed a gravity data base for the region, including over 5300 gravity readings for northern Libya. We have generated a Bouguer gravity map of northern Africa and are currently modeling gravity data along three transects across North Africa. These results were used as the basis on which to construct a preliminary map of crustal thickness for the region. The maps and interpreted transects are available through a World Wide Web site, and the gravity data base can also be accessed electronically, We have begun a collection of seismograms from Worldwide Standardized Seismograph Network stations located at regional distances from magnitude greater than 5.0 earthquakes occurring within North Africa (between 1963 and 1988) and their associated aftershocks. We have collected delay time, travel time, focal mechanisms, focal depth and magnitude information for these sequences for further analysis. At present, these data are being compiled into a database available on floppy diskette, but will eventually be transferred to a World Wide Web site.

Descriptors :   *DATA BASES, *SYSTEMS ENGINEERING, *GEOPHYSICS, *NORTH AFRICA, *LITHOSPHERE, *GEOLOGIC MODELS, LIBYA, THICKNESS, GLOBAL, SITES, DEPTH, TIME, SEISMIC DATA, EARTH CRUST, DATA ACQUISITION, DELAY, GRAVITY, MAPS, SYSTEMS APPROACH.

Subject Categories : Geology, Geochemistry and Mineralogy
      Computer Systems

Distribution Statement : APPROVED FOR PUBLIC RELEASE