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Reconnaissance ??13C and ??18O data from Trench 14, Busted Butte, and drill hole G-4, Yucca Mountain, Nevada test site

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Abstract

Trench 14 was excavated to investigate the extent of Quaternary movement on the Bow Ridge fault, a north-south structure on the east side of Yucca Mountain. The trench exposes calcite and opaline silica as fault breccia cements, veinlike fault fillings, and slope-parallel calcretes. Although the latter are clearly similar to calcretes of pedogenic origin, the cementing and fault-filling mineralization is enigmatic and has been variously attributed to deposition from ascending ground waters (warm or cool), from shallow-sourced (possibly perched) ground water, or from descending soil-zone waters ('recharge'). Preliminary ??13C and ??18O values of calcite from Trench 14, from sand-ramp calcretes and veinlike fault fillings at Busted Butte, and from drill core in the unsaturated zone of Yucca Mountain reveal some interesting trends and variations and provide some constraints on the temperature of calcite precipitation.

Additional Publication Details

Publication type:
Conference Paper
Publication Subtype:
Conference Paper
Title:
Reconnaissance ??13C and ??18O data from Trench 14, Busted Butte, and drill hole G-4, Yucca Mountain, Nevada test site
ISBN:
0872627519
Year Published:
1990
Language:
English
Publisher:
Publ by ASCE
Publisher location:
Boston, MA, United States
First page:
930
Last page:
933
Conference Title:
Proceedings of the 1st International Topical Meeting on High Level Radioactive Waste Management. Part 1
Conference Location:
Las Vegas, NV, USA
Conference Date:
8 April 1990 through 12 April 1990