Consequent upon instructions received from the Superintending Geologist, Mr. C.J. Sullivan, the copper-gold deposit at Yeuralba was visited and inspected on the 9th, 10th, and 11th May, 1950. This geological report gives an overview of the inspection and its findings. The situation, history, workings, general geology, orebody, mineralisation, and production history of the deposit are briefly described.

Producing petreoleum fields and potential petreoleum producers, oil and gas pipelines (current and proposed)

Three widely separated scout holes totalling 566 feet of drilling were drilled to investigate the possibilities of open-cut mining sites on the Australasian Seam immediately to the west and south-west of West Wallsend, a suburb of the city of Newcastle. Only one hole intersected the Australasian Seam. This hole indicated that the seam was much banded and of inferior quality - below present open-cut coal standard. Analyses suggested that it may be possible to mine a section of coal 8 feet 7 inches thick excluding non-coal bands, and that this coal would have an ash content of about 29% and calorific value of 10,000 B.Th.U. per lb. after the exclusion of bands.

Geoscience Australia provides information on the nation's future capacity to produce mineral resources. Australia's Identified Mineral Resources is an annual nation-wide assessment of Australia's ore reserves and mineral resources. All major and a number of minor mineral commodities mined in Australia are assessed. Australia's economic demonstrated resources (EDR) of the following mineral commodities increased during 2005 - bauxite, cobalt, diamond (gem and industrial), iron ore, manganese, nickel, rutile, silver, uranium, zinc and zircon. EDR of black coal, copper, gold and tantalum decreased in the same period. EDR for brown coal, magnesite, molybdenum, niobium, platinum group metals, shale oil, and vanadium remained at levels similar to those reported in 2005. Increases in EDR were due to on-going drilling and evaluation of known deposits resulting in the transfer (re-assessment) of resources from inferred or sub-economic categories into EDR, and discoveries of new deposits or extensions of known deposits. A few mining companies re-estimated ore reserves and mineral resources more conservatively, notably in regard to black coal, to comply with the requirements of the Australasian Code for Reporting of Mineral Resources and Ore Reserves (JORC Code).

Australia's Identified Mineral Resources is an annual nation-wide assessment of Australia's ore reserves and mineral resources.

In 1996, Australia's Economic Demonstrated Resources (EDR) of cobalt, gold, nickel, phosphate rock and tantalum increased substantially, while EDR of bauxite, lead, lithium, platinum group metals (PGM), silver and zinc rose slightly. There was a significant reduction in EDR of gem and near gem diamond and industrial diamond due to ongoing high levels of production. Magnesite and tin EDR were also significantly reduced as a result of depletion due to production and reassessment of deposits. EDR of all other commodities remained unchanged or had minor reductions. Australia continues to rank highly as one of the world's leading mineral resource nations. It has the world's largest EDR of bauxite, lead, mineral sands (ilmenite, rutile and zircon), silver, tantalum, uranium and zinc. In addition, its EDR is in the top six worldwide for black coal, brown coal, cobalt, copper, gold, iron ore, lithium, manganese ore, nickel, rare earth oxides, gem and near gem diamond and industrial diamond. Mineral exploration expenditure rose by 7.5% in 1995-96 to $960.2 million from $893.3 million in the previous year. Increases were recorded in all states and the Northern Territory. Gold was again the main target, accounting for 57% of the total expenditure. In 1995-96 mineral resources exports increased to a new record of $34.7 billion (thousand million), a rise of 12.7% over the previous fiscal year. These export earnings comprised 60% of Australia's commodity exports, 45% of merchandise exports and 35% of the country's total exports of goods and services. The Australian Bureau of Agricultural and Resource Economics (ABARE) forecast export earnings to set a further record in 1996-97, rising by nearly 4% to over $36 billion.

Geological investigation by the Bureau commenced late in July, 1948, and continued until the end of October of that year. The objects of the survey were to lay the foundation for future detailed studies of the mining field, to study the factors controlling ore localization, to assess the quantity and value of ore exposed to date, and to estimate the potential value of the field. In the search for orebodies, a knowledge of the geological factors can be of great assistance, and it is felt that the information given in this report and in the accompanying plans should be of considerable help in this respect. However, the prospector's methods - loaming, dollying, panning etc. are still quite fundamental to success in a prospecting field such as Tennant Creek and the suggestions made in this report are intended to supplement this type of work. The climate, topography, vegetation, gold production, general geology, and gold deposits of the area are described in this report. Detailed descriptions are given of the individual mines examined to date.

Legacy product - no abstract available

This statement supplements Record 1952/3 by H.B. Owen, which recorded the preliminary results of drilling for open-cut coal in the northern part of Portion 11, Ph. Stockrington near Newcastle, N.S.W. A further 33 holes, entailing 3,220 feet of drilling, were sunk in an area of about 430 acres immediately south of the area reported on by Owen. The majority of the holes were drilled into the Borehole Seam: two encountered only the beds below the Borehole Seam, and a number of holes encountered seams which may be the Australasian, Dudley, Yard, and Sandgate Seams. The results of the drilling indicate that the Borehole Seam is not suitable in this area for open-cut mining because of present high quality coal standards; however the lower plies of the seam, averaging 3 feet 6 inches in total thickness may be suitable for underground mining over a limited area of at least 25 acres. Total indicated reserves in this area are only 130,000 long tons (calculated on the basis of 1,500 tons per acre foot); the quality of the coal would be only fair: calorific value of about 11,500 B.Th.U/lb., ash content about 20%, and the coal would have some coking properties. Further drilling may increase this as workable area. It is considered that the preliminary results did not justify extensive prospecting of the Australasian(?), Dudley(?), Yard(?), or Sandgate Seams.

This statement sets out the results of drilling in part of the Minmi Area, Newcastle District. The area covered by the drilling grid totals about 390 acres and includes parts of Portion 130, Ph. of Teralba and Portions 15 and 26, Ph. of Hexam. This statement refers to the western and central blocks of the area. Proximate analyses and calorific value determinations of the coal cores were made by the New South Wales Mines Department laboratory in Sydney. The analyses here quoted indicate a composition roughly equivalent to that which might be expected for cleaned or hand-picked coal from this area.