CHARACTERIZATION OF SECONDARY ALTERATION IN THE COLUMBIA RIVER BASALT BY BACKSCATTERED ELECTRON IMAGING AND ENERGY-DISPERSIVE X-RAY SPECTROSCOPY.
By: P.P. Hearn, W.C. Steinkampf, and Z. A. Brown
Edited by: Romig Alton D.Jr.Goldstein Joseph I.
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Abstract
The thick sequences of flood basalts which underlie the Columbia River basin are important aquifiers, providing water for both agricultural and domestic use. Secondary alteration in these rocks occurs primarily as coatings or fillings in fractures and vesicles; alteration is generally believed to have occurred at low temperatures ( less than 100 C) by reaction with meteroic waters. The distribution and compositional variation of secondary minerals are therefore of major interest. This paper focuses on the compositional variation of the major alteration products and on present formulas based on the mean composition of these phases, and suggests possible reactions for the observed sequence of alteration.
Suggested Citation
Hearn, P., Steinkampf, W., Brown, Z.A., 1984, CHARACTERIZATION OF SECONDARY ALTERATION IN THE COLUMBIA RIVER BASALT BY BACKSCATTERED ELECTRON IMAGING AND ENERGY-DISPERSIVE X-RAY SPECTROSCOPY., in Proceedings, Annual Conference - Microbeam Analysis Society, Bethlehem, PA, USA, p. 145-148.
| Publication type | Conference Paper |
|---|---|
| Publication Subtype | Conference Paper |
| Title | CHARACTERIZATION OF SECONDARY ALTERATION IN THE COLUMBIA RIVER BASALT BY BACKSCATTERED ELECTRON IMAGING AND ENERGY-DISPERSIVE X-RAY SPECTROSCOPY. |
| Year Published | 1984 |
| Language | English |
| Larger Work Title | Proceedings, Annual Conference - Microbeam Analysis Society |
| First page | 145 |
| Last page | 148 |
| Conference Title | Microbeam Analysis 1984, Proceedings of the 19th Annual Conference of the Microbeam Analysis Society. |
| Conference Location | Bethlehem, PA, USA |