Composition and distribution of feldspars in magmatic and metamorphic rocks

Forelesninger holdt ved Advanced Study Institute of Feldspar - Oslo 1962
Lectures held at Advanced Study Institute of Feldspar - Oslo 1962

With the aid of modern methods of rapid analysis it is possible to investigate the Composition of feldspars statistically, using a great number of rock samples. Distribution patterns can be established by means of isochemical or isomodal lines revealing the internal structure of the rock body. Quantitative chemical and mineralogical determinations concerning the feldspar content of magmatic, metamorphic and anatectic rocks recently published are summarized and the results are confronted with the problems of feldspar formation generally discussed in the symposium.