ngu bull 436 2000 page 67 the geology exploration and characterisation of graphite deposits in the jennestad area vesteralen northern norway havard gautneb einar tveten gautneb h tveten e 2000 ...
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...Ngu bull page the geology exploration and characterisation of graphite deposits in jennestad area vesteralen northern norway havard gautneb einar tveten h e norges geologiske undersokelse bulletin this paper reviews nordland as a result helicopter aeromagnetic surveying subsequent ground geophysics mapping trenching some variously sized bodies schist were identified bearing occurs associated with dolomite marbles amphibolites pyroxene gneisses all which are intruded by charnockites granites is coarse fully ordered crystalline flaky grades up to carbon found gangue minerals ore quartz plagioclase k feldspar biotite orthopyroxene largest contain about tonnes each an average grade bench scale beneficiation tests shown that can be upgraded maximum c recovery it believed schists originally sediments rich organic matter wase converted during granulite facies metamorphism geological survey n trondheim introduction oldest rocks lofoten migmatitic intermediate andesitic composi has been major e...