LFASE Report: Crustal Study

• Main Authors: Posiolova, Liliya V., Orcutt, John A.
• Other Authors: SCRIPPS INSTITUTION OF OCEANOGRAPHY LA JOLLA CA INST OF GEOPHYSICS AND PLANETARY PHYSICS
• Format: Text
• Language: English
• Published: 1993
• Subjects: Physical and Dynamic Oceanography; Acoustics; *SEISMIC DATA; *OCEANIC CRUST; *LITHOSPHERE; FREQUENCY; MODELS; SITES; STRUCTURES; AMPLITUDE; LOW FREQUENCY; TRAVEL TIME; SEISMOGRAPHS; OCEAN BOTTOM; NORTH ATLANTIC OCEAN; REFRACTION; RECEIVERS; WAVEFORMS; ARRAYS; BOREHOLES; LFASE(LOW FREQUENCY ACOUSTIC SEISMIC EXPERIMENT); Purdy; North Atlantic
• Online Access: http://www.dtic.mil/docs/citations/ADA266893; http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA266893

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.