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Clay mineralogy of a sequence of andesitic tephra beds of western Taranaki, New Zealand

Published online by Cambridge University Press:  09 July 2018

J. H. Kirkman
J. H. Kirkman*
Affiliation:
Department of Soil Science, Massey University, Palmerston North, New Zealand
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Abstract

The clay mineralogy of a sequence of 36 andesitic tephra and associated paleosols dating from 320 to > 100,000 years BP has been studied using XRD, IR, DTA and TEM techniques. The mineralogy and weathering sequence is compared with that of rhyolitic tephra of central North Island, New Zealand.

Résumé

Résumé

La minéralogie de l'argile d'une suite de 36 téphrites andésitiques et des paléosols associés datant de 320 à plus de 100 000 ans a été étudiée en utilisant les techniques de diffraction des rayons X, infrarouge, d'analyse thermique différentielle et de microscopie électronique à transmission. La minéralogie et la séquence de désagrégation sont compareées avec celles des téphrites rhyolitiques du centre de North Island, en Nouvelle Zélande.

Kurzreferat

Kurzreferat

Mit Hilfe der XRD, der IRS, der DTA und der TEM wird eine Folge von 36 anderitischen Tephra-Proben und der zugehörigen Palaoböden mit einem Alter von 320 bis 100 000 Jahren BP tonmineralogisch untersucht. Die Mineralogie und die Verwitterungsfolge wird mit der von rhyolitischer Tephra des zentralen North Island, Neuseeland, verglichen.

Resumen

Resumen

Se ha estudiado la mineralogía de la arcilla de una serie de 36 tefras andesíticas y paleosuelos conexos que datan desde 320 hasta >100 000 años BP empleando técnicas de difractometría de rayos X, rayos infrarrojos, análisis térmico diferencial y TEM. Se compara la serie de mineralogía y meteorización con la de las tefras riolíticas del centro de la Isla del Norte de Nueva Zelandia.

Type
Research Article
Information
Clay Minerals , Volume 15 , Issue 2 , June 1980 , pp. 157 - 163
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1980

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