WARM SPRINGS, SOUTH ISLAND, NEW ZEALAND, AND THEIR POTENTIALS TO YIELD LAUMONTITE.

Abstract

Warm springs (40 degree to 65 degree C) of the South Island, New Zealand, are all supersaturated with laumontite and with few exceptions are either in equilibrium with or are unsaturated with calcite and albite. Two gels with cation-oxygen-silicon links were found as deposits forming from the waters. The isotopic measurements show the waters to be meteoric in origin. From isotopic compositions, dissolved CO//2 species are in part from organic carbon and in part from the solution of calcite, although there may be a magmatic CO//2 contribution.