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Title: Multiple episodes of zeolite deposition in fractured silicic tuff

Abstract

Fractures in silicic tuffs above the water table at Yucca Mountain, Nevada, USA contain two morphologies of heulandite with different compositions. Tabular heulandite is zoned, with Sr-rich cores and Mg-rich rims. Later prismatic heulandite is nearly the same composition as the more magnesian rims. Heulandite and stellerite may occur between layers of calcite, and calcite occurs locally between generations of heulandite. Thermodynamic modeling, using estimated thermodynamic data and observed chemical compositions for heulandite and stellerite, shows that stellerite is the favored zeolite unless Ca concentrations are reduced or Mg and/or Sr concentrations are significantly elevated above current Yucca Mountain waters.

Authors:
; ;
Publication Date:
Research Org.:
Los Alamos National Lab., NM (United States)
Sponsoring Org.:
USDOE, Washington, DC (United States)
OSTI Identifier:
62620
Report Number(s):
LA-UR-95-871; CONF-950888-1
ON: DE95009430
DOE Contract Number:  
W-7405-ENG-36
Resource Type:
Conference
Resource Relation:
Conference: International symposium on water-rock interaction, Vladivostok (Russian Federation), 13-28 Aug 1995; Other Information: PBD: [1995]
Country of Publication:
United States
Language:
English
Subject:
05 NUCLEAR FUELS; TUFF; FRACTURES; HIGH-LEVEL RADIOACTIVE WASTES; UNDERGROUND DISPOSAL; YUCCA MOUNTAIN; ZEOLITES; Yucca Mountain Project

Citation Formats

Carlos, B.A., Chipera, S.J., and Snow, M.G. Multiple episodes of zeolite deposition in fractured silicic tuff. United States: N. p., 1995. Web.
Carlos, B.A., Chipera, S.J., & Snow, M.G. Multiple episodes of zeolite deposition in fractured silicic tuff. United States.
Carlos, B.A., Chipera, S.J., and Snow, M.G. Sat . "Multiple episodes of zeolite deposition in fractured silicic tuff". United States. https://www.osti.gov/servlets/purl/62620.
@article{osti_62620,
title = {Multiple episodes of zeolite deposition in fractured silicic tuff},
author = {Carlos, B.A. and Chipera, S.J. and Snow, M.G.},
abstractNote = {Fractures in silicic tuffs above the water table at Yucca Mountain, Nevada, USA contain two morphologies of heulandite with different compositions. Tabular heulandite is zoned, with Sr-rich cores and Mg-rich rims. Later prismatic heulandite is nearly the same composition as the more magnesian rims. Heulandite and stellerite may occur between layers of calcite, and calcite occurs locally between generations of heulandite. Thermodynamic modeling, using estimated thermodynamic data and observed chemical compositions for heulandite and stellerite, shows that stellerite is the favored zeolite unless Ca concentrations are reduced or Mg and/or Sr concentrations are significantly elevated above current Yucca Mountain waters.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1995},
month = {4}
}

Conference:
Other availability
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