Starlight

Summary

Kimberlite-hosted Diamond/ Sapphire/ Spinel Prospect. Minfile 082N089 790 acres. ARIS Reports 13596, 15151, 17753, 20580 Property is accessed via a short 45km Helicopter ride North from Golden, BC. Relief in the area is steep and the elevation reaches nearly 2900m. Last results in 1990 may be found in Report 20580, pages 23&24. Alkaline diatremes and dikes of probable Paleozoic age occur in the central Golden cluster. The cluster of diatremes and associated crosscutting dikes northeast of Golden is situated within a Cambro-Ordovician stratigraphic and structural unit and may be coeval. Altered brown olivines and dark green spinels each make up about 2% of the rock. The two northern diatremes are narrow and smaller, and do not exhibit the variety of clast types that characterize the larger southern ones. They are well foliated with angular clasts comprising 20% of the rock volume. Dark green spinels are sparsely distributed. The groundmass is composed of a dusty carbonate, spinels and pyrite A dozen dikes, 1 to 2m wide, outcrop in the area. The dikes are porphyritic in hand sample with characteristic sieve-textured brown olivine pseudomorphs, altered euhedral clinopyroxenes, fine-grained micas and rare spinels.

Previous Work

In 1983, a 30kg portion of a 160kg bulk sample of a diatreme produced one ilmenite and thirteen chromites and one 0.00015820-carat microdiamond.