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Title: Quaternary faults near the proposed Eagle Flat low-level radioactive waste repository, Trans-Pecos Texas

Abstract

The Eagle Flat basin, an intermontane basin in Trans-Pecos Texas, is being considered as a possible site for the Texas repository of low-level radioactive wastes. Intermontane basins and associated normal faults formed in response to Basin and Range tectonism that began about 24 Ma ago. The most active late Tertiary and Quaternary faults occur within the Hueco Bolson (HB) and the Salt Basin/Salt Flat/Lobo Valley, west and east, respectively, of the proposed repository. Several faults of the southeast HB which are within 50 km of the site, displace middle Pleistocene deposits 10 to 24 m. The most recent surface rupture in the southeast HB probably occurred on the Amargosa fault during the Holocene. Upper Pleistocene deposits are offset 2.5 to 4.5 m, and middle Pleistocene deposits are displaced 24 m. Fault scarps within 50 km east of the proposed repository are associated with faults bounding the Salt Basin/Salt Flat/Lobo Valley. In the southern Salt Basin and northern Salt Flat, faults offset probable upper Pleistocene to Holocene deposits as much as 1.5 m. A scarp in Red Light Bolson, 13.5 km south of the site, is the closest Quaternary fault scarp to the proposed site. Only 7 km long, this scarpmore » is part of a mostly covered, probably multisegmented, 40-km-long fault that bounds the northeastern margin of Red Light Bolson. Offsets associated with single-rupture events range from 0.6 to 3 m, and average recurrence intervals between surface ruptures since middle Pleistocene are about 10,000 to 100,000 yr. The largest historical earthquake of the region, the 1931 Valentine earthquake, which had a magnitude of 6.4 and no reported surface rupture, occurred about 95 km southeast of the proposed repository.« less

Authors:
;  [1]
  1. Univ. of Texas, Austin, TX (United States). Bureau of Economic Geology
Publication Date:
OSTI Identifier:
6101460
Report Number(s):
CONF-921058-
Journal ID: ISSN 0016-7592; CODEN: GAAPBC
Resource Type:
Conference
Journal Name:
Geological Society of America, Abstracts with Programs; (United States)
Additional Journal Information:
Journal Volume: 24:7; Conference: 1992 annual meeting of the Geological Society of America (GSA), Cincinnati, OH (United States), 26-29 Oct 1992; Journal ID: ISSN 0016-7592
Country of Publication:
United States
Language:
English
Subject:
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES; 54 ENVIRONMENTAL SCIENCES; RADIOACTIVE WASTE FACILITIES; GEOLOGIC FAULTS; TEXAS; EARTHQUAKES; LOW-LEVEL RADIOACTIVE WASTES; QUATERNARY PERIOD; RADIOACTIVE WASTE DISPOSAL; SEISMICITY; SITE CHARACTERIZATION; TECTONICS; CENOZOIC ERA; DEVELOPED COUNTRIES; GEOLOGIC AGES; GEOLOGIC FRACTURES; GEOLOGIC STRUCTURES; MANAGEMENT; MATERIALS; NORTH AMERICA; NUCLEAR FACILITIES; RADIOACTIVE MATERIALS; RADIOACTIVE WASTE MANAGEMENT; RADIOACTIVE WASTES; SEISMIC EVENTS; USA; WASTE DISPOSAL; WASTE MANAGEMENT; WASTES; 052002* - Nuclear Fuels- Waste Disposal & Storage; 540250 - Environment, Terrestrial- Site Resource & Use Studies- (1990-)

Citation Formats

Collins, E W, and Raney, J A. Quaternary faults near the proposed Eagle Flat low-level radioactive waste repository, Trans-Pecos Texas. United States: N. p., 1992. Web.
Collins, E W, & Raney, J A. Quaternary faults near the proposed Eagle Flat low-level radioactive waste repository, Trans-Pecos Texas. United States.
Collins, E W, and Raney, J A. Wed . "Quaternary faults near the proposed Eagle Flat low-level radioactive waste repository, Trans-Pecos Texas". United States.
@article{osti_6101460,
title = {Quaternary faults near the proposed Eagle Flat low-level radioactive waste repository, Trans-Pecos Texas},
author = {Collins, E W and Raney, J A},
abstractNote = {The Eagle Flat basin, an intermontane basin in Trans-Pecos Texas, is being considered as a possible site for the Texas repository of low-level radioactive wastes. Intermontane basins and associated normal faults formed in response to Basin and Range tectonism that began about 24 Ma ago. The most active late Tertiary and Quaternary faults occur within the Hueco Bolson (HB) and the Salt Basin/Salt Flat/Lobo Valley, west and east, respectively, of the proposed repository. Several faults of the southeast HB which are within 50 km of the site, displace middle Pleistocene deposits 10 to 24 m. The most recent surface rupture in the southeast HB probably occurred on the Amargosa fault during the Holocene. Upper Pleistocene deposits are offset 2.5 to 4.5 m, and middle Pleistocene deposits are displaced 24 m. Fault scarps within 50 km east of the proposed repository are associated with faults bounding the Salt Basin/Salt Flat/Lobo Valley. In the southern Salt Basin and northern Salt Flat, faults offset probable upper Pleistocene to Holocene deposits as much as 1.5 m. A scarp in Red Light Bolson, 13.5 km south of the site, is the closest Quaternary fault scarp to the proposed site. Only 7 km long, this scarp is part of a mostly covered, probably multisegmented, 40-km-long fault that bounds the northeastern margin of Red Light Bolson. Offsets associated with single-rupture events range from 0.6 to 3 m, and average recurrence intervals between surface ruptures since middle Pleistocene are about 10,000 to 100,000 yr. The largest historical earthquake of the region, the 1931 Valentine earthquake, which had a magnitude of 6.4 and no reported surface rupture, occurred about 95 km southeast of the proposed repository.},
doi = {},
url = {https://www.osti.gov/biblio/6101460}, journal = {Geological Society of America, Abstracts with Programs; (United States)},
issn = {0016-7592},
number = ,
volume = 24:7,
place = {United States},
year = {1992},
month = {1}
}

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