1887
Volume 8, Issue 6
  • ISSN: 1569-4445
  • E-ISSN: 1873-0604

Abstract

ABSTRACT

The Kilmichael dome structure is a circular feature exposed in unconsolidated early Tertiary sediments of north‐central Mississippi, USA. The structural complexity of the area, including zones of intense faulting and uplifted strata, has led to several suggested origins for the formation of the Kilmichael dome, including meteorite impact and regional tectonics; however, the origin remains unknown. As part of an undergraduate student research project, we acquired shallow shear‐wave seismic reflection data over a complex zone of surface faults on the northern flank of the Kilmichael dome, with the goal of imaging the subsurface expression of deformation associated with faulting expressed along an exposed road cut. We also collected multi‐component downhole seismic data in a nearby borehole to analyse the shear‐wave velocity structure of the shallow sediments and observe possible anisotropy. Polarization analysis of the downhole data identified shear‐wave anisotropy consistent with structural alignments in the area. Interpretation of the reflection profile and particle motion plots from the downhole data allowed correlation with shallow structural features of the Kilmichael dome.

Loading

Article metrics loading...

/content/journals/10.3997/1873-0604.2010046
2010-08-01
2020-04-05
Loading full text...

Full text loading...

References

  1. AlfordR.M.1986. Shear data in the presence of azimuthal anisotropy: Dilley, Texas.56th SEG meeting, Houston, Texas, USA, Expanded Abstracts.
    [Google Scholar]
  2. CrampinS.1985. Evaluation of anisotropy by shear‐wave splitting. Geophysics50, 142–152.
    [Google Scholar]
  3. HarrelsonD.W. and IngramS.L.1999. Regional tectonics as an explanation for the Kilmichael structure.Journal of the Mississippi Academy of Sciences44, 48–49.
    [Google Scholar]
  4. HarrisJ.B.1996. Shear‐wave splitting in Quaternary sediments: Neotectonic implications in the central New Madrid seismic zone.Geophysics61, 1871–1882.
    [Google Scholar]
  5. HarrisJ B.2005. Observations of shear‐wave splitting in Quaternary sediments of the New Madrid seismic zone: An indicator of in‐situ stress conditions?SAGEEP Proceedings, 952–958.
    [Google Scholar]
  6. HarrisJ. B.2009. Hammer‐impact SH‐wave seismic reflection methods in neotectonic investigations: General observations and case histories from the Mississippi Embayment, U.S.A.Journal of Earth Science20, 513–525.
    [Google Scholar]
  7. HunterJ.A., PullanS.E., BurnsR.A., GoodR.L., HarrisJ.B., PuginA., SkvortsovA. and GoriainovN.N.1998. Downhole seismic logging for high‐resolution reflection surveying in unconsolidated overburden.Geophysics63, 1371–1384.
    [Google Scholar]
  8. IngramS.L.1998. Kilmichael Dome, Montgomery County, Mississippi.Journal of the Mississippi Academy of Sciences43, 37.
    [Google Scholar]
  9. PriddyR.R. and McCutcheonT.E.1943. Montgomery County mineral resources.Mississippi State Geological Survey51, 9–49.
    [Google Scholar]
  10. PuginA.J.M., LarsonT.H., SargentS.L., McBrideJ.H. and BexfieldC.E.2004. Near‐surface mapping using SH‐wave and P‐wave seismic land‐streamer data acquisition in Illinois, U.S.The Leading Edge23, 677–682.
    [Google Scholar]
  11. RobertsonP.B. and ButlerM.D.1982. The Kilmichael structure Mississippi: Evidence for a meteorite impact origin.Journal of Geology90, 589–601.
    [Google Scholar]
  12. SemkoA.J. and CoxR.T.2002. More field data from the Kilmichael Structure, Montgomery County, Mississippi. 2002 North‐Central Section and Southeastern Section, GSA Joint Annual Meeting, Expanded Abstracts.
    [Google Scholar]
  13. WintersteinD.F., DeG.S. and MeadowsM.A.2001. Twelve years of vertical birefringence in nine‐component VSP data.Geophysics66, 582–597.
    [Google Scholar]
  14. WooleryW.W., StreetR.L., WangZ. and HarrisJ B.1993. Near‐surface deformation in the new Madrid seismic zone as imaged by high‐resolution SH‐wave seismic methods.Geophysical Research Letters20, 1615–1618.
    [Google Scholar]
http://instance.metastore.ingenta.com/content/journals/10.3997/1873-0604.2010046
Loading
/content/journals/10.3997/1873-0604.2010046
Loading

Data & Media loading...

  • Article Type: Research Article
This is a required field
Please enter a valid email address
Approval was a Success
Invalid data
An Error Occurred
Approval was partially successful, following selected items could not be processed due to error