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Title: Predicted Geology of the Pahute Mesa-Oasis Valley Phase II Drilling Initiative

Abstract

Pahute Mesa–Oasis Valley (PM-OV) Phase II drilling will occur within an area that encompasses approximately 117 square kilometers (45 square miles) near the center of the Phase I PM-OV hydrostratigraphic framework model area. The majority of the investigation area lies within dissected volcanic terrain between Pahute Mesa on the north and Timber Mountain on the south. This area consists of a complex distribution of volcanic tuff and lava of generally rhyolitic composition erupted from nearby calderas and related vents. Several large buried volcanic structural features control the distribution of volcanic units in the investigation area. The Area 20 caldera, including its structural margin and associated caldera collapse collar, underlies the northeastern portion of the investigation area. The southern half of the investigation area lies within the northwestern portion of the Timber Mountain caldera complex, including portions of the caldera moat and resurgent dome. Another significant structural feature in the area is the west-northwest-trending Northern Timber Mountain moat structural zone, which bisects the northern portion of the investigation area and forms a structural bench. The proposed wells of the UGTA Phase II drilling initiative can be grouped into four generalized volcanic structural domains based on the stratigraphic distribution and structural positionmore » of the volcanic rocks in the upper 1,000 meters (3,300 feet) of the crust, a depth that represents the approximate planned total depths of the proposed wells.« less

Authors:
Publication Date:
Research Org.:
National Security Technologies, LLC (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NA)
OSTI Identifier:
961537
Report Number(s):
DOE/NV/25946-705
TRN: US0903364
DOE Contract Number:  
DE-AC52-06NA25946
Resource Type:
Conference
Resource Relation:
Conference: UGTA Technical Information Exchange Meeting; Desert Research Institute, Las Vegas, NV; April 20, 2009
Country of Publication:
United States
Language:
English
Subject:
58 GEOSCIENCES; 12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES; CALDERAS; DISTRIBUTION; DRILLING; GEOLOGY; LAVA; MOUNTAINS; TUFF; VOLCANIC ROCKS; UGTA, Pahute Mesa, drilling, volcanic rocks

Citation Formats

NSTec Environmental Restoration. Predicted Geology of the Pahute Mesa-Oasis Valley Phase II Drilling Initiative. United States: N. p., 2009. Web.
NSTec Environmental Restoration. Predicted Geology of the Pahute Mesa-Oasis Valley Phase II Drilling Initiative. United States.
NSTec Environmental Restoration. Mon . "Predicted Geology of the Pahute Mesa-Oasis Valley Phase II Drilling Initiative". United States. https://www.osti.gov/servlets/purl/961537.
@article{osti_961537,
title = {Predicted Geology of the Pahute Mesa-Oasis Valley Phase II Drilling Initiative},
author = {NSTec Environmental Restoration},
abstractNote = {Pahute Mesa–Oasis Valley (PM-OV) Phase II drilling will occur within an area that encompasses approximately 117 square kilometers (45 square miles) near the center of the Phase I PM-OV hydrostratigraphic framework model area. The majority of the investigation area lies within dissected volcanic terrain between Pahute Mesa on the north and Timber Mountain on the south. This area consists of a complex distribution of volcanic tuff and lava of generally rhyolitic composition erupted from nearby calderas and related vents. Several large buried volcanic structural features control the distribution of volcanic units in the investigation area. The Area 20 caldera, including its structural margin and associated caldera collapse collar, underlies the northeastern portion of the investigation area. The southern half of the investigation area lies within the northwestern portion of the Timber Mountain caldera complex, including portions of the caldera moat and resurgent dome. Another significant structural feature in the area is the west-northwest-trending Northern Timber Mountain moat structural zone, which bisects the northern portion of the investigation area and forms a structural bench. The proposed wells of the UGTA Phase II drilling initiative can be grouped into four generalized volcanic structural domains based on the stratigraphic distribution and structural position of the volcanic rocks in the upper 1,000 meters (3,300 feet) of the crust, a depth that represents the approximate planned total depths of the proposed wells.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Mon Apr 20 00:00:00 EDT 2009},
month = {Mon Apr 20 00:00:00 EDT 2009}
}

Conference:
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