Major and trace element analyses of Cretaceous plutonic rocks in the Fairbanks mining district, Alaska

TL;DRAbstract

Cretaceous granitic rocks comprise a small, but important part of the Fairbanks mining district, as they are spatially and temporally associated with much of the lode mineralization (Newberry et al., 1995). Rb/Sr, K-Ar, Ar-Ar and U-Pb dating of the quartz-rich plutonic rocks indicates that they were intruded at about 92 Ma; a small syenite plug on 07Connor Creek has a U-Pb age of 110 Ma (Newberry et al., 1996). As part of a continuing study of the geology of the Fairbanks mining district, granitic rocks have been collected and analyzed since 1975, but there has been no systematic compilation of major and trace element data. This report presents all available public sector analyses performed between 1980 and 1996, together with rock descriptions and locations.

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