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Palygorskite—by direct precipitation from a hydrothermal solution

Published online by Cambridge University Press:  09 July 2018

W. J. Furbish  and
T. W. Sando
W. J. Furbish
Affiliation:
Department of Geology, Duke University, Durham, North Carolina, U.S.A.
T. W. Sando
Affiliation:
Department of Geology, Duke University, Durham, North Carolina, U.S.A.
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Abstract

Palygorskite, associated with aragonite, occurs as a fracture filling in a dunite body that has been intruded by felsic pegmatites. The palygorskite formed by direct precipitation from solutions given off by the pegmatite. Aluminium, calcium and silicon were provided by the pegmatite solutions while magnesium was derived from the serpentinization of the dunite along the host fractures. No direct replacement took place.

Sommaire

Sommaire

La palygorskite associée avec l'aragonite se présente cornine une cassure remplie par de la dunnite qui a été introduite de force par des pegmatites felsiques. La palygorskite est formée par la precipitation directe de solutions produites par la pegmatite. Les aluminium, calcium et silicium ont été fournis par les solutions de pegmatite tandis que le magnesium était derive de la serpentinisation de la dunite le long des nombreuses cassures. Aucan remplacement direct n'a eu lieu.

Kurzreferat

Kurzreferat

Palygorskit in Verbindung mit Aragonit kommt als Bruchstellenfullung in einem Dunitkòrper vor, in den Felsit-Pegmatiten eingedrungen sind. Das Palygorskit beruht auf direckter Fàllung aus von dem Pegmatit abgegebenen Lòsungen. Aluminium, Kalzium und Silizium wurden durch die Pegmatitlosungen geliefert, wahrend Magnesium durch die Serpentinisation des Dunits entlang der Wirtbruchstellen gewonnen wurde. Es fand kein unmittelbarer Ersatz statt.

Referata

Referata

La paligorskita, asociada con la aragonita, se presenta comò un relleno de disyuncion en un macizo de dunita que ha sido objeto de intrusion por pegmatitas felsicas. La paligorskita se formo por precipitacion directa de soluciones desprendidas por la pegmatita. Aluminio, calcio y silicio fueron aportados por las soluciones de la pegmatita, mientras que se derivo magnesio de la serpentinizacion de la dunita a lo largo de las fisuras hospedantes. No tuvo lugar ningin reemplazo directo.

Type
Research Article
Information
Clay Minerals , Volume 11 , Issue 2 , June 1976 , pp. 147 - 152
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1976

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