Hydrothermal alteration of graywacke and basalt by 4 m NaCl
Economic Geology
By: R.J. Rosenbauer, J. L. Bischoff, and A. S. Radtke
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Abstract
Separate experiments at 350 degrees C and 500 bars at a rock/fluid ratio of 1/10. Illite, dolomite, and quartz amounting to 67 percent of the original graywacke, were converted to albite and smectite. The rock gained Na and released Ca, K, heavy metals, and CO 2 to solution. In sharp contrast, the reaction of 4 m NaCl with basalt produced only minor alteration. Albitization of graywacke produces H (super +) whereas albitization of basalt apparently consumes H (super +) . All experiments to date that have reacted basalt with sea water, natural brine, and fully saturated NaCl over a variety of conditions have been unsuccessful in producing a spilite alteration assemblage.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Hydrothermal alteration of graywacke and basalt by 4 m NaCl |
| Series title | Economic Geology |
| DOI | 10.2113/gsecongeo.78.8.1701 |
| Volume | 78 |
| Issue | 8 |
| Year Published | 1983 |
| Language | English |
| Publisher | Society of Economic Geologists |
| Description | 10 p. |
| First page | 1701 |
| Last page | 1710 |
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