The Yenberrie uranium prospect is 3.5 miles east of the Stuart Highway, and 4.5 miles in a direction 15 degrees east of north from the bridge across the Edith River, which is 33 miles by road northward from Katherine, and 137 miles southward from Darwin. The prospect is 1.5 miles slightly north of west from the old Yenberrie wolfram and molybdenite mines. Geophysical investigations at the prospect during 1953 consisted of brief radiometric, self-potential and magnetic surveys.

During the 1950 Field Season three radiometric anomalies were located by geophysical methods on a low hill situated between 1,300 and 2,000 feet east of White's Deposit. This area is known as White's Extended Prospect. In 1951 geological mapping on a scale of 40 feet to an inch was undertaken and this was followed by costeaning and diamond drilling. Owing to other commitments in the Rum Jungle area the explanatory programme and mapping in the White's Extended area has not been completed.

The prospect is an existing cooper lease (M.L.69B) held by Messrs. J.W. Watson and K. Cooper who carried out some mining in the area in 1950. The area was first visited in 1953 by I.A. Mumme whose interest was aroused by the pre-existing copper prospects and the close proximity of the Shoobridge granite. Further examination was carried out by Mumme and the writer early in November, and detailed mapping was done on a scale of 100 feet to the inch by the writer and D.N. Smith. Radioactive rocks and the secondary uranium mineral torbernite were discovered at this prospect, which is a copper mine, on October 25th 1953 by I.A. Mumme. A survey plan of the mine shafts, pits and costeans and lines of mineralization was prepared by I.A. Mumme on the 5th and 6th of November so that a suitable base line could be chosen for magnetic and self-potential test traversing. Three magnetometer traverses were completed. P. Rosenhain visited the area on the 5th November and inspected the shafts, stopes and costeans and carried out geological mapping from the 16th November to the 19th November. Further magnetic and self-potential traversing and some reconnaissance radiometric field work was carried out during the two periods 16th November to 20th November, and 24th November to 28th November.

The Waterhouse Uranium Prospect No. 1 is situated in a sequence of siltstone, quartzite and shales of Lower Proterozoic Age, occurring on the south east flank of the Rum Jungle domal structure. Detailed geological and radiometric surveying were done, and these show a small but significant radiometric high in the siltstone. Mineralization is indicated in the area by two zones of limonitic casts disseminated through favourable beds, one in the shale and the other in the siltstone in the vicinity of the anomaly. Weak copper mineralization is indicated in the north east sector of the area in silicified shale. Sampling was done for 100 feet over the area of greatest radioactivity. Further work by diamond drilling has been recommended to determine the effects of leaching, and as a guide to the interpretation of other anomalies of similar type in the area.

Madigan's uranium prospect is situated in a Lower Proterozoic sequence of interbedded sandy shales, sandstone and grits. It is located near the headwaters of the Charlotte River, near the crest and on the eastern side of a northerly trending ridge. Detailed geological and radiometric surveys were carried out and significant radioactivity was outlined over an area of approximately 300 feet by 400 feet. Some channel sampling was done over 50 feet in the zone of highest radioactivity. The greatest radioactivity appears to be associated with hematitic material occurring sporadically in a system of flat joints in a grit bed. Some fluorescent minerals were observed in this material.

The airborne scintillometer survey made in the latter half of 1952 revealed a number of anomalies in the Brodribb area. Detailed geological and geophysical work was carried out on this prospect during 1952 (Frankovich 1953) and some costeans were excavated by bulldozer. In 1953 diamond drilling and further geological and geophysical work was undertaken. During 1953, six diamond drill holes, with a total footage of 1583 feet, were drilled in the Brodribb area and were arranged to make an exhaustive test for the occurrence of a primary uranium deposit of importance in the area.

Morstone Station is situated approximately 50 miles north-east of Camooweal, on the Camooweal 4-mile sheet, North-west Queensland. The owners of the property, Western Grazing Co. Pty. Ltd., have experienced difficulties in obtaining underground water on part of their property for many years, and have asked for this report because the Bureau's 'Camooweal Party' has spent a considerable time during the present field season (1953) completing the mapping of the Camooweal sheet. A number of geologists have contributed to the mapping of the area, notably Dr. F.W. Whitehouse, but the more detailed mapping and investigation are largely the work of Dr. A.A. Opik, Senior Palaeontologist, Bureau of Mineral Resources, who is at present expending the work of previous field seasons. A number of bores were sited for the Company by K.A. Townley, Bureau of Mineral Resources during a short visit in 1951. Three of his proposed sites correspond reasonably closely to our sites A, B and C. Recent investigations, in which the writers have shared, throw some new light on problems of underground water supply on Morstone property, but as the work is still in progress the present report deals only with the specific problems on which the Company's representatives have requested urgent advice.

Gold Mining Lease 1075 is situated at the head of Rowlands Creek, a tributary of Barola Creek. The workings are on the hillside just south of the head of Rowlands Creek and approximately five miles west-south-west from Kainantu Sub-District Office and Airstrip in the Eastern Highlands of New Guinea. The elevation of the workings is approximately 6,200 feet above sea-level. The area was examined by the writer in April, 1953. [The history and development of the lease, transport and resources, general geology, ore geology, the occurrence of the gold, and further prospects, are discussed in this report].

Part of 4th March, as well as 5th March, were spent at Carcoar, New South Wales, in inspecting the radioactive deposits in that locality and in observing the use of a helicopter, loaned by the R.A.A.F., as a means of prospecting for radioactive minerals. The writer was accompanied by R.S. Matheson of the Geological Section of the Bureau, and J. Daly and a party of geophysicists were also present at Carcoar at the time of this inspection. The present note is supplementary to the report by R.S. Matheson (1952/65) which includes plans of the Carcoar area and the radioactive deposits, and should be read in conjunction with that report.

During 1951 three separate sets of La Cour pattern Quartz Horizontal Magnetometers were received from the Danish Meteorological Institute. These instruments which are only semi-absolute, were calibrated at the Rude Skov Magnetic Observatory against the standard adopted by that observatory. As the Australian observatories are based on the International Magnetic Standard housed at Cheltenham near Washington, U.S.A. (hereinafter referred to as I.M.S.) it was decided to compare them against the Toolangi magnetometer as soon as possible after their arrival in Australia. Moreover, as the stability of these instruments depends on the torsion properties of a quartz fibre and on the magnetic moment of a magnet, regular comparisons should be made with an absolute magnetometer and the results used to control drift that might occur. The comparisons made immediately after the arrival of the instruments in Australia would thus constitute a starting point in the future control of the Q.H.Ms. [An account is given of work done between 1951 and 1952. Results are appended.]