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The AAPG/Datapages Combined Publications Database
Journal of Sedimentary Research (SEPM)
Abstract
Authigenic Pectolite, Stevensite, and Pyroaurite in a Quaternary Debris Flow, Southland, New Zealand
David Craw, Charles A. Landis
ABSTRACT
Pectolite, stevensite, pyroaurite, calcite, and aragonite are described from cavities, veins, and groundmass of an ophiolite-derived late Quaternary debris flow deposit. The debris flow occurs in an area devoid of hydrothermal activity and therefore the authigenic minerals must have formed under essentially surficial P-T conditions.
Pectolite formed in the debris flow appears to be more fibrous than pectolite formed at higher temperatures. Stevensite occurs as veins and as a replacement of pectolite. Pyroaurite occurs as fibrous mats.
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