The quartz in Echassieres area is genetically related to the La Bosse granite, and the later Beauvoir granite penetrating the stockwork has di- vided it into two parts; the upper part and the lower part. Wolframite has the composition of ferberite which contains Mn0 1 .2- 10.4% and is rich in Nb (Nb2O5=0.1-5.1%)but poor in Ta
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王汝成,1991,法国Echassieres地区石英网脉中黑钨矿及其共生矿物的固溶体研究[J].岩石矿物学杂志,10(4):369~378.,1991,Solid Solutions in Wolframite and Associated Minerals from the Quartz Stockwork of Echassieres·Area, France[J]. Acta Petrologica et Mineralogica,10(4):369~378.
