Abstract

Strontium isotopic analyses have been made on strontium-rich, rubidium-poor gangue minerals from several vein-type hydrothermal deposits. These minerals were from deposits in which: (1) Tertiary mineralization occurs within rocks of Tertiary age, (2) Tertiary mineralization occurs within rocks of Precambrian age, and (3) the mineralization is Precambrian. The results of these analyses show that the strontium was derived, at least to a very large extent, from the rocks of the host environment.

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