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The AAPG/Datapages Combined Publications Database

Journal of Sedimentary Research (SEPM)

Abstract


Journal of Sedimentary Petrology
Vol. 50 (1980)No. 2. (June), Pages 497-503

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 Previous HithydrothermalTop 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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