EL 3040 Cosmo Annual report for year ending January 1983.

Abstract

During the year 33 auger drill holes were completed, using the company's tractor-mounted auger drill, for an aggregate depth of 157 metres (average 4.76m.) with depths varying between l.5m. and 7.8m. The drill holes were mainly concentrated on the western side of the highway where outcropping rock types comprise banded ferruginous quartz chlorite schists, tuffaceous arenites, slates, cherts and siltstones of the South Alligator Group. Drill holes averaged approximately 50 metres apart and were close to old gold diggings and over alluvial flats. The old diggings occur along a line sub-parallel to and west of the highway. Samples were taken at one metre intervals in the holes, placed into large plastic bags, dried, weighed and panned to concentrate. The concentrates were colour counted and are retained in the company's possession at Howard Springs. Generally values were fairly low in overall samples, varying from approximately 0.1 to 2.5 gin. Au/tonne. Sampling along an old trench approximately 32 metres long and 1.5 to 2 m. wide showed gold colours after panning. Five trenches were dug to a depth of 3.5 to 4 metres in alluvial gravels by back-hoe and vertical side wall samples were panned,