The laboratory albitization of mid-ocean ridge basalt
Journal of Geology
By: Robert J. Rosenbauer, James L. Bischoff, and Robert A. Zierenberg
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Abstract
Complete alteration of fresh mid-ocean ridge basalt to albite + actinolite + smectite took place in the presence of quartz and 3.4m NaCl at 350°C and 400 bars. Significant Na-metasomatism occurred in exchange for Ca + Fe + Mn. In contrast, alteration of the basalt/quartz mixture with a synthetically prepared "natural brine," and basalt with 3.4m NaCl or "natural brine" did not produce significant albitization. Based on these and previous experiments that reacted basalt with a variety of fluids, it is concluded that excess silica, a high Na/Ca ratio, and an absence of strong acidity (dissolved Mg) in the altering fluid are important for the albitization of basalt.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | The laboratory albitization of mid-ocean ridge basalt |
| Series title | Journal of Geology |
| DOI | 10.1086/629213 |
| Volume | 96 |
| Issue | 2 |
| Year Published | 1988 |
| Language | English |
| Publisher | University of Chicago Press |
| Contributing office(s) | Pacific Coastal and Marine Science Center |
| Description | 8 p. |
| First page | 237 |
| Last page | 244 |