Background and Overview of Previous Controlled Source Seismic Studies

Claus Prodehl, Roy A. Johnson, G. Randy Keller, Catherine M. Snelson, Hanna Maria Rumpel

Research output: Chapter in Book/Report/Conference proceedingChapter

1 Scopus citations

Abstract

Controlled source seismic techniques offer useful tools to study the structure of the earth's crust and upper mantle in considerable detail. The seismic reflection technique uses source-receiver offsets that are relatively small in comparison to the intended maximum depth of penetration, and the goal is to form an image of the subsurface structure through sophisticated data processing. The seismic refraction technique uses source-receiver offsets that are large in comparison to the intended maximum depth of penetration. Sophisticated interpretation methods have been developed to derive velocity models from these data. Reflection and refraction data are traditionally gathered along profiles and produce 2-D results, but new instrumentation is making surveys with an element of 3-D coverage possible at a crustal scale. From the standpoint of seismic refraction and reflection surveys, coverage for the Southern Rocky Mountains and surrounding areas before the 1999 CD-ROM project was relatively poor. Reflection surveys targeting the deep crust were particularly sparse. Of the pre- 1999 refraction data, several profiles are at least partly unreversed, most have only a few widely spaced shotpoints, and for most profiles, the interval between recording stations is typically >10 km. The thickest crust in the region (~50 km) does not correlate directly with the highest topography. The Southern Rocky Mountains are bisected by the Rio Grande rift whose crust thins from north to south and is at least 5 km thinner than that of adjacent regions. There is also evidence for crustal thinning across southern Wyoming.

Original languageEnglish (US)
Title of host publicationThe Rocky Mountain Region
Subtitle of host publicationAn Evolving Lithosphere: Tectonics, Geochemistry, and Geophysics
PublisherAmerican Geophysical Union
Pages201-216
Number of pages16
ISBN (Electronic)9781118666326
ISBN (Print)0875904181, 9780875904191
DOIs
StatePublished - Mar 19 2013

Keywords

  • Core-mantle boundary
  • Geology, Structural-Rocky Mountains
  • Geophysics-Rocky Mountains
  • Orogeny-Rocky Mountains

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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  • Cite this

    Prodehl, C., Johnson, R. A., Randy Keller, G., Snelson, C. M., & Rumpel, H. M. (2013). Background and Overview of Previous Controlled Source Seismic Studies. In The Rocky Mountain Region: An Evolving Lithosphere: Tectonics, Geochemistry, and Geophysics (pp. 201-216). American Geophysical Union. https://doi.org/10.1029/154GM14