Equilibrium modeling of the formation of zeolites in fractures at Yucca Mountain, Nevada [electronic resource].
- Published:
- Washington, D.C. : United States. Dept. of Energy, 1993.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy. - Physical Description:
- 28 pages : digital, PDF file
- Additional Creators:
- Los Alamos National Laboratory
United States. Department of Energy
United States. Department of Energy. Office of Scientific and Technical Information - Access Online:
- www.osti.gov
- Summary:
- Yucca Mountain, in southern Nevada, is currently being investigated to determine its suitability to host the first US high-level nuclear waste repository. One of the reasons that Yucca Mountain was chosen for study is the presence of thick sequences of zeolite-rich horizons. In as much as fractures may serve as potential pathways for aqueous transport, the minerals that line fractures are of particular interest. Zeolites are common in fractures at Yucca Mountain and consist mainly of clinoptilolite/heulandite and mordenite although sporadic occurrences of chabazite, erionite, phillipsite, and stellrite have been identified using X-ray powder diffraction. To understand better the conditions under which the observed zeolite species were formed, thermodynamic data were estimated and calculations of log a((K⁺)²/Ca{sup ++}) versus log a((Na⁺)²/Ca{sup ++}) were conducted at various temperatures and silica activities. Using present-day Yucca Mountain water chemistries as a lower constraint on silica activity, clinoptilolite/heulandite and mordenite are still the zeolite species that would form under present conditions.
- Subject(s):
- Note:
- Published through SciTech Connect.
08/01/1993.
"la-ur--93-2761"
" conf-9306100--4"
"DE93018290"
Zeolite 93: 4th international conference on the occurrence, properties, and utilization of natural zeolites, Boise, ID (United States), 20-28 Jun 1993.
Bish, D.L.; Chipera, S.J.; Carlos, B.A. - Funding Information:
- W-7405-ENG-36
View MARC record | catkey: 14380812