Report on EL 220 for the year ended 31st December 1972.

Abstract

Ranger 44 - The Ranger 44 locality is on the flood plain of Magela Creek 11km west-south-west of Cahill's Crossing on the East Alligator River. Ranger 44 is a small isolated magnetic anomaly detected by an airborne survey. The grid origin (00/00) is at AMG co-ordinates 269800E/862290ON approximately. An auger drill hole at 300W/00 near the edge of the flood plain was terminated at 23.3m in alluvial sand. A ground magnetic survey was carried. Cannon Hill - The Cannon Hill traverse is on an Arnhem Highway survey 9km south-west of Cannon Hill. Surface scree was mapped and auger cuttings were geologically logged. Auger drilling was carried out at 75 to 100 feet spacings along the highway survey. Samples collected from the B horizon were analysed for Uranium, Copper, Lead, Phosphorus, Manganese, Titanium and Nickel. Gravity and magnetics were read along the traverse. Ranger 9 - The Ranger 9 traverse origin (00/00) is located 13km south of Ramil Waterhole at AMG coordinates 248400E/8617400N approximately. The traverse extends along that northing from 24200E to 250000E. Auger drilling was carried out on the western two-thirds of the traverse. Drilling was suspended following heavy rain. B horizon samples were analysed for Uranium, Copper Lead, Phosphorus, Titanium and Manganese. Gravity and magnetics were read along the traverse. Ramil Waterhole - The Ramil Waterhole grid origin is located at AMG coordinates 249700E/8634600N 5km north-north-east of Ramil Waterhole. Geological mapping of scree was carried out on the grid. On traverse 00N, auger cuttings were geologically logged. Auger drilling was carried out on the 00N traverse. B horizon samples were assayed for Uranium, Copper, Lead, Phosphorus, Titanium and Nickel. five auger/diamond drill holes were completed. The holes were drilled with 4 inch augers, cased off', and core was taken from the bottom of the hole. Magnetics and gravity were read on traverse 00N. A diamond drill hole was sited to test the positive magnetic feature which occurs immediately east of' the grid origin.

Coolaborrie Stratigraphic Waterhole - Diamond drill hole MBS1 is located 6km north-north-west of Ramil Waterhole, at AMG coordinates 245350E/8636100N approximately. The hole was designed to test the stratigraphic sequence in the basin of probable Lower Cretaceous Mullaman Beds.