Accession Number:

ADP204481

Title:

Crustal Heterogeneity in the Basin and Range,

Descriptive Note:

Corporate Author:

TEXAS UNIV AT AUSTIN INST FOR GEOPHYSICS

Report Date:

1995-08-14

Pagination or Media Count:

10.0

Abstract:

We are investigating the fine-scale structure of the Earths crust in order to understand its influence on high frequency 0.5-30 Hz regional wave propagation. We have developed geologically based stochastic models of crustal heterogeneity for a number of different tectonic provinces and crustal levels. Here we have focused on examining geologic maps from extended terranes, and seismic data from the northern and southern Basin and Range. We have developed two different deterministicstochastic velocity models which produce synthetic seismograms showing many of the reflectivity patterns and crustal events Pg, PmP, Sg, SmS observed in Basin and Range near-vertical and wide-angle seismic data. We also have developed several ways to measure the lateral heterogeneity scale length from unstacked seismic data, and have tested them on synthetic data with promising results.

Subject Categories:

  • Government and Political Science
  • Geology, Geochemistry and Mineralogy
  • Seismology
  • Seismic Detection and Detectors
  • Nuclear Weapons

Distribution Statement:

APPROVED FOR PUBLIC RELEASE