J. L. Bischoff A. S. Radtke R.J. Rosenbauer 1983 <p><span>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&nbsp;</span>₂<span>&nbsp;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.</span></p> application/pdf 10.2113/gsecongeo.78.8.1701 en Society of Economic Geologists Hydrothermal alteration of graywacke and basalt by 4 m NaCl article