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Surface studies of feldspar dissolution using surface replication combined with electron microscopic and spectroscopic techniques

Abstract

The replica of a microcline cleavage surface was examined before and at various stages of interaction with water and acid solutions at 70/sup 0/C, as part of basic geochemical research for the Canadian Nuclear Fuel Waste Management Program to investigate the feasibility of disposal of these wastes in repositories mined in crystalline rocks. The objective of the report presented was to investigate the mechanism for Al and Si removal during incongruent dissolution of feldspars and its effect on dissolution rate. It was found that phase transformation, like dissolution occured preferentially along crystal defects on the surfaces of the feldspars. Secondary minerals always occured as discrete particles occupying only a very small fraction of the total parent surface, and hence, their presence would not affect the bulk composition or, in this regard, the overall dissolution rate of the feldspars by the formation of diffusion barriers.
Authors:
Fung, P C; [1]  Sanipelli, G G
  1. Petro-Canada, Calgary, Alberta
Publication Date:
Apr 01, 1982
Product Type:
Journal Article
Reference Number:
EDB-82-153124
Resource Relation:
Journal Name: Geochim. Cosmochim. Acta; (United Kingdom); Journal Volume: 46:4
Subject:
58 GEOSCIENCES; 12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES; 15 GEOTHERMAL ENERGY; FELDSPARS; DISSOLUTION; ALUMINIUM; GEOCHEMISTRY; MINERALOGY; PHASE TRANSFORMATIONS; RADIOACTIVE WASTE DISPOSAL; SILICON; UNDERGROUND DISPOSAL; CHEMISTRY; ELEMENTS; MANAGEMENT; METALS; MINERALS; SEMIMETALS; WASTE DISPOSAL; WASTE MANAGEMENT; 580400* - Geochemistry- (-1989); 052002 - Nuclear Fuels- Waste Disposal & Storage; 152003 - Geothermal Data & Theory- Rock-Water-Gas Interactions
OSTI ID:
5067338
Country of Origin:
United Kingdom
Language:
English
Other Identifying Numbers:
Journal ID: CODEN: GCACA
Submitting Site:
HEDB
Size:
Pages: 503-512
Announcement Date:
Aug 01, 1982

Citation Formats

Fung, P C, and Sanipelli, G G. Surface studies of feldspar dissolution using surface replication combined with electron microscopic and spectroscopic techniques. United Kingdom: N. p., 1982. Web. doi:10.1016/0016-7037(82)90154-5.
Fung, P C, & Sanipelli, G G. Surface studies of feldspar dissolution using surface replication combined with electron microscopic and spectroscopic techniques. United Kingdom. https://doi.org/10.1016/0016-7037(82)90154-5
Fung, P C, and Sanipelli, G G. 1982. "Surface studies of feldspar dissolution using surface replication combined with electron microscopic and spectroscopic techniques." United Kingdom. https://doi.org/10.1016/0016-7037(82)90154-5.
@misc{etde_5067338,
title = {Surface studies of feldspar dissolution using surface replication combined with electron microscopic and spectroscopic techniques}
author = {Fung, P C, and Sanipelli, G G}
abstractNote = {The replica of a microcline cleavage surface was examined before and at various stages of interaction with water and acid solutions at 70/sup 0/C, as part of basic geochemical research for the Canadian Nuclear Fuel Waste Management Program to investigate the feasibility of disposal of these wastes in repositories mined in crystalline rocks. The objective of the report presented was to investigate the mechanism for Al and Si removal during incongruent dissolution of feldspars and its effect on dissolution rate. It was found that phase transformation, like dissolution occured preferentially along crystal defects on the surfaces of the feldspars. Secondary minerals always occured as discrete particles occupying only a very small fraction of the total parent surface, and hence, their presence would not affect the bulk composition or, in this regard, the overall dissolution rate of the feldspars by the formation of diffusion barriers.}
doi = {10.1016/0016-7037(82)90154-5}
journal = []
volume = {46:4}
journal type = {AC}
place = {United Kingdom}
year = {1982}
month = {Apr}
}