Annual report for Cox Peninsula 1987.

Abstract

This report is submitted to the Northern Territory Department of Mines and Energy and details exploration carried out by Greenex and behalf of Barbara Mining Corporation and Greenbushes Ltd on EL 3491 during the period August 1986 -August 1987. Exploration Licence 3491 is located on Cox Peninsula south-west of Darwin. This licence is one of a number held in the region by the Bynoe Joint Venture. These licences are actively being explored for tin/tantalum mineralised pegmatite and alluvial deposits. Samples of weathered pegmatite and alluvium were collected from auger drill holes and backhoe trench samples. Samples were collected at 1.5 m intervals from auger drill holes and stored in plastic bags. Aluminium tags stapled to the bags designated the hole co-ordinates and the interval sampled. Generally the drill holes were continued until the drill bit could no longer penetrate or if unfavourable rock units were encountered the hole was abandoned. Often veins of quartz would halt penetration of the drill. Each hole was geologically logged. The visible mineral assemblage was noted, the clay content, the consistency of the clay (its stickiness), the moisture content, colour, degree of weathering and the interval designated a rock type. The trenches were channel sampled and logged. Approximately 10 litres of sample was collected from each interval. Care was taken in digging and the sampling of the trenches to get below the enriched eluvial zone. All samples were hauled to a central processing facility by the main camp site. A total of 190 in of costeaning was completed over the old workings. Auger drilling totalled 134.5 m.