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Title: Pen Branch fault program: Interim report on the High Resolution, Shallow Seismic Reflection surveys

Technical Report ·
DOI:https://doi.org/10.2172/7067100· OSTI ID:7067100
 [1]
  1. Westinghouse Savannah River Co., Aiken, SC (United States)

The Pen Branch fault was identified in the subsurface at the Savannah River Site in 1989 based upon the interpretation of earlier seismic reflection surveys and other geologic investigations. A program was initiated at that time to further define the fault in terms of its capability to release seismic energy. The High-Resolution, Shallow Seismic Reflection survey recently completed at SRS was initiated to determine the shallowest extent of the fault and to demonstrate the presence of flat-lying sediments in the top 300 feet of sediments. Conclusions at this time are based upon this shallow seismic survey and the Conoco deep seismic survey (1988--1989). Deformation related to the Pen Branch fault is at least 200 milliseconds beneath the surface in the Conoco data and at least 150 milliseconds in the shallow seismic reflection data. This corresponds to approximately 300 feet below the surface. Sediments at that depth are lower Tertiary (Danian stage) or over 60 million years old. This indicates that the fault is not capable.

Research Organization:
Savannah River Site (SRS), Aiken, SC (United States); Emerald Exploration Consultants, Inc., Austin, TX (United States)
Sponsoring Organization:
USDOE; USDOE, Washington, DC (United States)
DOE Contract Number:
AC09-89SR18035
OSTI ID:
7067100
Report Number(s):
WSRC-TR-91-30; ON: DE92016704; CNN: SA20207S
Country of Publication:
United States
Language:
English