PALYGORSKITE IN THE REGOLITH FROM THE MOKAU DISTRICT, NORTH-ISLAND, NEW-ZEALAND

被引：4
|
作者：
KIRKMAN, JH
WALLACE, RC
机构：
来源：
CLAY MINERALS | 1994年 / 29卷 / 02期
关键词：
D O I：
10.1180/claymin.1994.029.2.12
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Corrugated mats of palygorskite occurring in regolith overlying a fissured limestone were examined by X-ray diffraction, infrared spectroscopy. and electron optical techniques after heating at 50-degrees-C intervals to 700-degrees-C. Palygorskite 'anhydride' formed at 400-degrees-C and sillimanite formed at 500-degrees-C. The palygorskite is believed to have formed in joints in limestone of Upper Oligocene age (Duntroonian) prior to uplift and subsequent weathering. It is highly crystalline, and appears not to have altered or weathered since precipitation.
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页码：265 / 272
页数：8
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