ARAGONITE DEPOSITED FROM BROADLANDS GEOTHERMAL DRILLHOLE WATER
- 1 December 1973
- journal article
- research article
- Published by Taylor & Francis in New Zealand Journal of Geology and Geophysics
- Vol. 16 (4) , 927-933
- https://doi.org/10.1080/00288306.1973.10555232
Abstract
Aragonite has deposited from waters discharged from Broadlands geothermal drillhole, Br6. Waters from the drillhole, in contrast with others from the geothermal field, are highly supersaturated with CaCO3 and contain relatively high concentrations of Mg2+, Ca2+, Sr2+ and HCO3-. The formation of aragonite instead of calcite results from the rapid precipitation rate and the stabilising effect of the Ba2+, Sr2+, and possibly Mg2+ on the orthorhombic structure.Keywords
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