Accession Number : ADA266893


Title :   LFASE Report: Crustal Study


Descriptive Note : Final rept. 1 Oct 88-31 Mar 91,


Corporate Author : SCRIPPS INSTITUTION OF OCEANOGRAPHY LA JOLLA CA INST OF GEOPHYSICS AND PLANETARY PHYSICS


Personal Author(s) : Posiolova, Liliya V ; Orcutt, John A


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a266893.pdf


Report Date : 12 Jul 1993


Pagination or Media Count : 37


Abstract : The data set described in this report was collected on 150-154 Ma oceanic crust during the DARPA/Navy Low Frequency Acoustic Seismic Experiment (LFASE). This is some of the oldest lithosphere remaining in the modern oceans. The experiment used an array of airguns as a source and ocean bottom seismographs (OBS) and a borehole array as receivers. our final model of the seismic structure of oceanic crust at the LFASE Site was obtained using travel times along with general characteristics of amplitudes and waveforms of the crustal P-wave arrivals. In this paper we discuss the results of the LFASE seismic data interpretation and compare our results to those of Purdy (1983) for 140 Ma lithosphere.... Airgun refraction profiles, North Atlantic, Oldest oceanic lithosphere, Oceanic crust, WKBJ Synthetic seismograms.


Descriptors :   *SEISMIC DATA , *OCEANIC CRUST , *LITHOSPHERE , FREQUENCY , MODELS , SITES , STRUCTURES , ACOUSTICS , AMPLITUDE , LOW FREQUENCY , TRAVEL TIME , SEISMOGRAPHS , OCEAN BOTTOM , NORTH ATLANTIC OCEAN , REFRACTION , RECEIVERS , WAVEFORMS , ARRAYS , BOREHOLES


Subject Categories : Physical and Dynamic Oceanography
      Acoustics


Distribution Statement : APPROVED FOR PUBLIC RELEASE