| Title | Mineralogical and Microbial Characteristics of an Acid-Derived Siliceous Sinter from a Thermal Outflow at Parariki Stream, Rotokawa Geothermal Field, New Zealand |
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| Authors | R. Schinteie, K.A. Campbell, P.R.L. Browne & S.J. Turner |
| Year | 2004 |
| Conference | New Zealand Geothermal Workshop |
| Keywords | |
| Abstract | Unusual deposits of siliceous sinter form around hot (>75oC) vents on a thermal outflow at Parariki Stream, in the Rotokawa geothermal field. The sinter forms subaerially on pumice clasts and pine cones from silica rich acid-sulphide-chloride waters (pH 2.3). The main mineral phase is noncrystalline opal-A silica with full width at half maximum intensity (FWHM) values of 1.34-1.42 |