Petrologic studies of drill cores USW-G2 and UE25b-1H, Yucca Mountain, Nevada

Technical Report · Thu Jul 01 00:00:00 EDT 1982

DOI:https://doi.org/10.2172/59138· OSTI ID:59138

Caporuscio, F; Vaniman, D; Bish, D; Broxton, D; Arney, B; Heiken, G; Byers, F; Gooley, R; Semarge, E

The tuffs of the Nevada Test Site are currently under investigation as a possible deep geologic site for high-level radioactive waste disposal. This report characterizes tuff retrieved in core from two drill holes, USW-G2 and UE25b-1H, at the Yucca Mountain block. The USW-G2 drill core is from the northernmost extent of the block, whereas UE25b-1H is adjacent to an earlier drill hole, UE25a-1. The drill cores USW-G2 and UE25b-1H bottomed at 6000 and 4200 ft, respectively. Petrographic and x-ray diffraction studies of the two drill cores are presented in this report and indicate that tuffs (composed primarily of variably welded ash flows) are partially recrystallized to secondary minerals. Correlations of stratigraphy are also made with previous drill cores from Yucca Mountain.

• Research Organization: Los Alamos National Lab., NM (United States)
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 59138
• Report Number(s): LA--9255-MS; ON: DE82021846
• Country of Publication: United States
• Language: English

Related Subjects

05 NUCLEAR FUELS
58 GEOSCIENCES
CORRELATIONS
DRILL CORES
EXPERIMENTAL DATA
GEOLOGIC DEPOSITS
HIGH-LEVEL RADIOACTIVE WASTES
NEVADA TEST SITE
PETROLOGY
RADIOACTIVE WASTE DISPOSAL
STRATIGRAPHY
TUFF
UNDERGROUND DISPOSAL
X-RAY DIFFRACTION
Yucca Mountain Project