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in subjects: "Solutes"  
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open access

Timescales of spherulite crystallization in obsidian inferred from water concentration profiles

Description: We determined the kinetics of spherulite growth in obsidians from Krafla volcano, Iceland. We measured water concentration profiles around spherulites in obsidian by synchrotron Fourier transform infrared spectroscopy. The distribution of OH? groups surrounding spherulites decreases exponentially away from the spherulite-glass border, reflecting expulsion of water during crystallization of an anhydrous paragenesis (plagioclase + SiO2 + clinopyroxene + magnetite). This pattern is controlled by a… more
Date: June 25, 2008
Creator: Castro, Jonathan M.; Beck, Pierre; Tuffen, Hugh; Nichols, Alexander R.L.; Dingwell, Donald B. & Martin, Michael C
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Field-scale in situ measurements of vadose zone flow and transport using multiple tracers at INEEL Vadose Zone Research Park (VZRP) - EMSP5-02-06

Description: This study is aimed at obtaining a better understanding of vadose zone flow and transport processes at the field scale and establishing defensible links between laboratory- and field-derived transport parameters for conservative and reactive elements in the vadose zone. The study site (Vadose Zone Research Park [VZRP] at INEEL) provides a three-dimensional instrumentation array strategically surrounding a new infiltration pond slated for initial use in the upcoming year, and the Big Lost River,… more
Date: June 25, 2003
Creator: Roback, Robert C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Field-scale in situ measurements of vadose zone flow and transport using multiple tracers at INEEL Vadose Zone Research Park (VZRP) - EMSP5-02-06

Description: This study is aimed at obtaining a better understanding of vadose zone flow and transport processes at the field scale and establishing defensible links between laboratory- and field-derived transport parameters for conservative and reactive elements in the vadose zone. The study site (Vadose Zone Research Park [VZRP] at INEEL) provides a three dimensional instrumentation array strategically surrounding a new infiltration pond slated for initial use in the upcoming year, and the Big Lost River,… more
Date: June 25, 2003
Creator: Roback, Robert C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

2002 Initial Assessments for B-BX-BY Field Investigation Report (FIR): Numerical Simulations

Description: IIn support of CH2M HILL Hanford Group, Inc.'s (CHG) preparation of a Field Investigative Report (FIR) for the Hanford Site Single-Shell Tank (SST) Waste Management Area (WMA) B-BX-BY, a set of numerical simulations of flow and solute transport was executed to predict the performance of surface barriers for reducing long-term risks from potential groundwater contamination at the B-BX-BY WMA. This report documents the simulation of 14 cases involving two-dimensional cross sections through the B-… more
Date: August 25, 2002
Creator: Freedman, Vicky L.; Williams, Mark D.; Cole, C. R.; White, Mark D. & Bergeron, Marcel P.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Summary of micrographic analysis of selected core samples from Well ER-20-6{number_sign}1 in support of matrix diffusion testing

Description: ER-20-6{number_sign}1 was cored to determine fracture and lithologic properties proximal to the BULLION test cavity. Selected samples from ER-20-6{number_sign}1 were subjected to matrix and/or fracture diffusion experiments to assess solute movement in this environment. Micrographic analysis of these samples suggests that the similarity in bulk chemical composition results in very similar mineral assemblages forming along natural fractures. These samples are all part of the mafic-poor Calico Hi… more
Date: September 25, 1998
Creator: IT Corporation, Las Vegas
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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