Palygorskite in the Regolith from the Mokau District, North Island, New Zealand
| Autor: | J. H. Kirkman, R. C. Wallace |
|---|---|
| Rok vydání: | 1994 |
| Předmět: |
Palygorskite
Mineralogy 020101 civil engineering Weathering 02 engineering and technology 010502 geochemistry & geophysics 01 natural sciences Regolith 0201 civil engineering Geochemistry and Petrology medicine Carbonate rock Sedimentary rock Sillimanite Clay minerals Paleogene Geology 0105 earth and related environmental sciences medicine.drug |
| Zdroj: | Clay Minerals. 29:265-272 |
| ISSN: | 1471-8030 0009-8558 |
| DOI: | 10.1180/claymin.1994.029.2.12 |
| Popis: | A B S T R A C T: 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~ intervals to 700~ Palygorskite 'anhydride' formed at 400~ and sillimanite formed at 500~ The palygorskite is believed to have formed in joints in limestone of Upper Oligocene age (Dnntroonian) prior to uplift and subsequent weathering. It is highly crystalline, and appears not to have altered or weathered since precipitation. Small deposits of palygorskite have been reported from North Island, New Zealand locations by Henderson (1921), Lowry (1964) and Soong and Perrin (1983). Henderson (1921) described white material in veinlets in sandy limestone near Mahoenui which is located in the Mokau district (Fig. 1). On the basis of a chemical analysis, Henderson suggested that the material was probably sepiolite. Lowry (1964) recorded palygors |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|