Hydrothermal alteration of graywacke and basalt by 4 m NaCl
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.
Citation Information
Publication Year | 1983 |
---|---|
Title | Hydrothermal alteration of graywacke and basalt by 4 m NaCl |
DOI | 10.2113/gsecongeo.78.8.1701 |
Authors | R.J. Rosenbauer, J. L. Bischoff, A. S. Radtke |
Publication Type | Article |
Publication Subtype | Journal Article |
Series Title | Economic Geology |
Index ID | 70011221 |
Record Source | USGS Publications Warehouse |