Type (b) Pegmatites of type (b) occur in swarms close to their parent granite....Economic minerals associated with the cassiterite
are tantalite, monazite (with a high content of rare earths) and gadolinite. Some fluorite is occasionally seen, but beryl and lithium minerals are absent. These pegmatites are richest in tin where they intrude the more mafic gneisses, or migmatites with an appreciable content of amphibolite and biotite rock. The placer deposits of Moolyella, Cooglegong, Eley's, Pinga Creek and Coondina were derived from pegmatites of type (b).
I found this in a 1969 WA mines doc, did make me pause, but then again that is a long time ago and maybe lithium has been uncovered since. Your post only reinforces the doubt for me though, Waelly! Keeping away from this for now.
Type (b) Pegmatites of type (b) occur in swarms close to their...
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