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A Ferroan Nontronite from the Red Sea Geothermal System

Published online by Cambridge University Press:  01 July 2024

James L. Bischoff
James L. Bischoff*
Affiliation:
Department of Geological Sciences, University of Southern California, Los Angeles, Calif. 90007, U.S.A.
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Abstract

A smectite rich in ferrous iron and low in aluminum occurs abundantly in the Red Sea Geothermal Deposits, and appear to be forming at present.

Chemical analyses and Mössbauer spectra indicate the mineral is intermediate in composition between nontronite and the as yet undescribed trioctahedral ferrous iron end member.

Résumé

Résumé

Une smectite riche en fer ferreux et pauvre en aluminium est abondamment rencontrée dans les dépôts géothermaux de la Mer Rouge, et il apparaît qu’elle se forme actuellement.

Les analyses chimiques et les spectres Mössbauer indiquent que ce minéral a une composition intermédiaire entre celle de la nontronite et celle du terme ultime de la série trioctaédrique à fer ferreux non encore décrit.

Kurzreferat

Kurzreferat

Ein Smectit (Seifenstein) reich an Ferro-Eisen und mit niedrigen Aluminiumgehalt kommt reichlich vor in den geothemischen Ablagerungen des Roten Meeres.

Chemische Analyse und Mössbauer Spektren zeigen an, dass das Mineral in seiner Zusammensetzung eine Mittelstellung zwischen Nontronit und dem bisher nicht beschriebenen trioktaedrischen Ferro-Eisen-Endglied einnimmt.

Резюме

Резюме

Смектит, богатый примесью двухвалентного железа и с низким содержанием алюминия, находится в изобилии в геотермических отложениях Красного моря и, кажется, образовывается даже в настоящее время.

Химические анализы и спектры Моссбауера указывают, что этот минерал является промежуточным продуктом между нонтронитом и еще неописанным конечным элементом решетки трех-октахедральным двухвалентным железом.

Type
Research Article
Information
Clays and Clay Minerals , Volume 20 , Issue 4 , August 1972 , pp. 217 - 223
Copyright
Copyright © Clay Minerals Society 1972

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References

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