Physics
Scientific paper
Jul 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002georl..29m..17m&link_type=abstract
Geophysical Research Letters, Volume 29, Issue 13, pp. 17-1, CiteID 1639, DOI 10.1029/2001GL013819
Physics
Seismology: Continental Crust (1242), Tectonophysics: Continental Contractional Orogenic Belts, Tectonophysics: Continental Tectonics-General (0905)
Scientific paper
Seismic reflection data show ~40° S-dipping reflectors that extend from the Cheyenne belt (CB-Archean-Proterozoic suture) to 20 km depths, and profound differences in crustal reflectivity across the suture zone, which is itself imaged as an interwedging boundary. Archean crust has a Moho reflection (at 40 km) and abundant upper crustal reflectivity; Proterozoic crust has no Moho reflection and is distinctly less reflective. Reflective zones south of the Cheyenne belt include 40° S- and N-dipping reflections that extend from the Farwell Mountain zone to 20 km depths; these are interpreted to be a complex cryptic suture zone between the 1.78-1.76 Ga Green Mountain block and 1.75-1.72 Ga Rawah block.
Boyd Nickolas K.
Chamberlain Kevin R.
Foster Thomas C.
Johnson Roy A.
Karlstrom Karl E.
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