Abstract
Samples of till, stream sediment and water, and lake sediment and water were collected over an 800-km 2 area in the vicinity of a 6 × 8 km peralkaline granite which hosts a large-tonnage deposit of Zr-Y-Nb-Be-REE. The samples were analyzed for up to 28 elements. Erosion of the granite during continental glaciation has formed a geochemical dispersion pattern at least 40 km in length in all sample media. Dispersion patterns in till are strong, linear and narrow; those in streams somewhat broader while those in lake data provide the widest exploration target. The best indicator elements in till and stream sediment data include Be, Pb, Nb, La and Y. Yttrium and F in stream water are also very useful. Lake sediment and water samples were analyzed for fewer elements; of these Be and Pb in sediment and F in water best reflect the mineralized granite.
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