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Title: Volcanic hazards of the Idaho National Engineering Laboratory and adjacent areas

Potential volcanic hazards are assessed, and hazard zone maps are developed for the Idaho National Engineering Laboratory (INEL) and adjacent areas. The basis of the hazards assessment and mapping is the past volcanic history of the INEL region, and the apparent similarity of INEL volcanism with equivalent, well-studied phenomena in other regions of active volcanism, particularly Hawaii and Iceland. The most significant hazards to INEL facilities are associated with basaltic volcanism, chiefly lava flows, which move slowly and mainly threaten property by inundation or burning. Related hazards are volcanic gases and tephra, and ground disturbance associated with the ascent of magma under the volcanic zones. Several volcanic zones are identified in the INEL area. These zones contain most of the volcanic vents and fissures of the region and are inferred to be the most probable sites of future INEL volcanism. Volcanic-recurrence estimates are given for each of the volcanic zones based on geochronology of the lavas, together with the results of field and petrographic investigations concerning the cogenetic relationships of INEL volcanic deposits and associated magma intrusion. Annual probabilities of basaltic volcanism within the INEL volcanic zones range from 6.2 {times} 10{sup {minus}5} per year (average 16,000-year interval between eruptions)more » for the axial volcanic zone near the southern INEL boundary and the Arco volcanic-rift zone near the western INEL boundary, to 1 {times} 10{sup {minus}5} per year (average 100,000-year interval between eruptions) for the Howe-East Butte volcanic rift zone, a geologically old and poorly defined feature of the central portion of INEL. Three volcanic hazard zone maps are developed for the INEL area: lava flow hazard zones, a tephra (volcanic ash) and gas hazard zone, and a ground-deformation hazard zone. The maps are useful in land-use planning, site selection, and safety analysis.« less
Authors:
 [1] ;  [2]
  1. WRH Associates, Salt Lake City, UT (United States)
  2. Lockheed Idaho Technologies Co., Idaho Falls, ID (United States)
Publication Date:
OSTI Identifier:
653932
Report Number(s):
INEL--94/0276
ON: DE98052557; TRN: 98:010153
DOE Contract Number:
AC07-94ID13223
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: Dec 1994
Research Org:
Lockheed Martin Idaho Technologies Co., Idaho National Engineering Lab., Idaho Falls, ID (United States)
Sponsoring Org:
USDOE Office of Environmental Restoration and Waste Management, Washington, DC (United States)
Country of Publication:
United States
Language:
English
Subject:
05 NUCLEAR FUELS; 54 ENVIRONMENTAL SCIENCES; IDAHO NATIONAL ENGINEERING LABORATORY; VOLCANISM; SITE CHARACTERIZATION; HAZARDS; PROBABILISTIC ESTIMATION; MAPS