The quantitative mineralogy of ceramic grade kaolin from the St. Austell Granite and its relationship to chemistry and physical properties

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Authors:Scott, P. W.; Hart, F. W.; Smith, D.
Author Affiliations:Primary:
University of Exeter, Camborne School of Mines, Redruth, United Kingdom
Other:
Goonvean and Rostowrack China Clay Company, United Kingdom
Volume Title:Proceedings of the Ussher Society; research into the geology and geomorphology of South-West England
Volume Authors:Williams, Brian J., editor
Source:Proceedings of the Ussher Society, Vol.9(Part 1), p.91-96; 1996 annual conference of the Ussher Society, Plymouth, United Kingdom, Jan. 1996, edited by Brian J. Williams. Publisher: Ussher Society, Bristol, United Kingdom. ISSN: 0566-3954
Publication Date:1996
Note:In English. 13 refs.; illus., incl. 6 tables, sketch map
Summary:The variation in physical properties of different kaolin products from this granite can be explained by quantitative variations in mineralogy. Quartz, K-feldspar, smectite and mica occur in varying amounts with occasional tourmaline. The mica is a Li- and F-rich dioctahedral type. An increase in smectite content corresponds with an increase in strength in the clay as measured by the modulus of rupture (MOR), and the c.e.c determined by the methylene blue index. The particle size distribution of the clay, particularly the 2 µm fraction, is not a reliable indicator of the likely MOR of clay bodies. Kaolin with a high smectite content occurs adjacent to partly kaolinized areas, where there is also a significant amount of K-feldspar in the refined clay products. The smectite is a dioctahedral montmorillonite. [R.E.S.]
Subjects:Ceramic materials; Chemical properties; Clay mineralogy; Granites; Igneous rocks; Kaolin deposits; Kaolinization; Metasomatism; Mineral composition; Mineral deposits, genesis; Physical properties; Plutonic rocks; Cornwall England; England; Europe; Great Britain; United Kingdom; Western Europe; Clays; Saint Austell Granite
Coordinates:N502000 N503000 W0043000 W0050000
Abstract Numbers:97M/2431
Record ID:1997029809
Copyright Information:GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom
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