Variability within a saprolite deposit near Quebec City, Canada

Autor:	Chang Wang, M. R. Laverdiere, Christian De Kimpe, Pierre LaSalle
Rok vydání:	1985
Předmět:	Mineral Geochemistry General Earth and Planetary Sciences Kaolinite Mineralogy Spatial variability Mica Saprolite Clay minerals Geology Mylonite Gneiss
Zdroj:	Canadian Journal of Earth Sciences. 22:781-785
ISSN:	1480-3313 0008-4077
DOI:	10.1139/e85-083
Popis:	Samples were collected in two trenches opened in a saprolite developed in a mylonite derived from biotite–garnet gneiss near Quebec City in order to investigate the spatial variability from the points of view of morphological, physical, mineralogical, and chemical properties. Phyllosilicate assemblages were: (a) kaolinite, (b) mica, (c) kaolinite + mica, and (d) mica + interstratified minerals (+ smectite). Grouping of the samples according to prominent colour in the matrix showed a relation between chroma and kaolinite content. Total chemical analyses were in good agreement with mineral assemblages. The spatial distribution of these assemblages corresponded to the degree of transformation of the gneiss into mylonite.
Databáze:	OpenAIRE
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