In 1935 Mr. F. Blake of the Geological Survey of Tasmania visited Cape Barren Island in connection with the underground water supply at Franklin Village which is situated on Sanford Bay in the northwest part of the island. He collected a small sample of fossiliferous limestone which he forwarded to the late Mr. F. Chapman who was then Commonwealth Palaeontologist. No examination of the material was made at the time. Recently it came under the notice of the writer who has made a detailed microscopic examination of it. The results of the examination are recorded in this report.

The Mont Murphy reefs occur in sedimentary rocks, which strike northwest and dip southwest at 45 degrees, about 31/44 mile north from an intrusive granite contact. The reefs, which strike north to northeast and dip steeply east, can be divided into three groups - the No. 1 reef, the No. 2 reef, and the Upper Mount Murphy group. Total positive plus probable ore on present mine exposures adds up to 1,132 tons, containing 18 tons tungstic oxide worth £9,900. Possible additional ore is about 2,500 tons with a tungstic oxide content of perhaps 41 tons. There is little prospect of capital invested being returned but the mine may pay operating costs if working expenses are kept to a minimum.

On June 20th King Island Scheelite N.L. asked for advice on the location of suitable drill holes north of their present 150 and 170ft. faces to determine the geology along the No. 3 fault. In this report a scheme of drilling is set out, which would determine the geological structure of the area and indicate tonnage of ore and overburden. A plan is attached to the report which shows the bench limits, the main geological features and selected diamond drill hole sites.

An examination of a small area flanking the Molonglo River at Acton was undertaken at the request of the Department of Works and Housing. The construction of the weir across the river within the area examined to raise the water level to 1825' is proposed, and the geological investigation was carried out in connection with this proposed work. Aspects of general geology and engineering geology are discussed. A geological plan and sketch sections are included.

The Northern Australian Development Committee nominated the region of the Ord and Victoria rivers to be surveyed by the Northern Australian Regional Survey, when the Barkly Region had been completed. The immediate objectives of the Survey are "to accurately record the nature of the country, to establish a sound basis upon which the production possibilities of the Region may be appraised and to make general recommendations concerning development and further investigations." It was decided that the region should include the Army Four Mile Map Sheets of Delamere, Victoria River Downs, Wave Hill, Birrundudu, Limbunya, Waterloo, Auvergne, Port Keats, Medusa Banks, Cambridge Gulf, Lissadell, Dixon Range, and Gordon Downs, and that the field work would be commenced during the 1949 dry season. The techniques and methods used to complete this survey work are noted. The stratigraphy, pedology, and economic geology of the area are described in some detail.

Evaporites comprise all deposits formed by the evaporation of water and the precipitation of its constituents, such as calcium sulphate, sodium chloride, and potassium compounds. They may be found as rock-gypsum, anhydrite, rock-salt or potash-salt deposits at depth in pre-Recent geological series, or as Recent formations of gypsum and salt on the surface. The main object of this report is to show the conditions under which evaporite sediments are formed, what salt deposits are to date known in Australia, where rock-gypsum, rock-salt and potash-salt deposits may be expected within pre-Recent formations, and how further investigations should be carried out.

This Record contains a shipboard interpretation of the data acquired on Geoscience Australia Survey 229 off the Australian Antarctic Territory from January-April 2002. The survey acquired deep-seismic and potential field data along 8600 km of profiles as part of the Australian Antarctic and Southern Profiling Project.

Old molybdenite-wolfram-bismuth workings in the Stanthorpe-New England area were tested for radioactivity by means of a Geiger-Muller Counter. This report is intended to furnish some notes on the geology of the areas examined, and only general remarks are given on the results of testing for radio-activity.

The practical CO2 storage capacity and injectivity of the Caswell Fan reservoir, Upper Campanian, Caswell Sub-basin, Browse Basin has been studied through dynamic reservoir simulation using CMG-GEMTM. The three major trapping mechanisms of CO2 storage have been studied in this study are hydrodynamic/structural/stratigraphic trapping, solubility trapping and residual gas trapping. Two different-sized grid models (coarse and fine), upscaled from the Caswell Reservoir geological model were used to complete the dynamic simulation. The coarse grid model was mainly used on the simulation tests and sensitivity analysis. The modified Peng-Robinson equation of state was employed to model the CO2 solubility and brine density. A gas-water relative permeability hysteresis model was used to study the residual trapping mechanism during the migration process of CO2 in the porous reservoir rocks. The main findings in this study are summarised as follows: - The CO2 gas bubble displaces formation water with an immiscible behaviour. During and after the displacement, the gravitational effects of water and CO2 (buoyancy-driven) cause the CO2 to rise and accumulate under the caprock. - The solubility of CO2 is controlled by the reservoir conditions, including reservoir pressure, temperature and formation water salinity through changing Henry's law constant. The brine density is increased due to the dissolution of CO2 and at saturation with CO2, the brine water has a higher mass density and tends to move downward or sink. - With a decrease of residual gas saturation, more CO2 migrates throughout the reservoir and is dissolved into brine water, and less CO2 is trapped as a residual gas in the reservoir. - There is no significant change in the bottom hole pressure and injection rates at the injection well with different residual gas saturation concentrations during the simulation process. - The increase of vertical and horizontal permeability (Kv/Kh) ratio makes CO2 easier to migrate and move upwards, and the bottom hole pressure at the injection well decreases with the same injection rate. The change of the Kv/Kh ratio does not affect the distribution of CO2 between the gas and aqueous phase. - Reservoir heterogeneity and the dip angle of the reservoir clearly control the migration of CO2 plume and the accumulation of CO2. - The CO2 injectivity is controlled by reservoir characteristics, such as reservoir porosity, absolute and relative permeability and ratio of Kv/Kh. - The total injection amount of CO2 within the fine grid model is higher than that of the coarse grid model due to the design of more perforations. More supercritical CO2 gas exists in the post-injection period in the fine grid model. - The CO2 migration rate is affected by the reservoir properties, including reservoir permeability and the vertical to horizontal permeability ratio. - The practical storage capacity of the Caswell Fan is more than 50.28 million tonnes for one horizontal well, more than 99.34 million tonnes for two horizontal wells, and more than 171.06 million tonnes for six vertical injection wells. - The compositional simulator, CMG-GEMTM, is suitable to carry out the full-physics dynamic simulation of CO2 migration and storage.

Natural hazards pose a serious threat to the lives and livelihoods of people living in developing countries throughout the Asia-Pacific region. One of the key mechanisms for reducing the impact of these events is to build capacity in these countries to mitigate for natural hazards. An improved understanding of natural hazards and the implementation of reliable, widely-tested computational models for assessing hazard will ultimately assist in disaster preparedness and response. Geoscience Australia (GA) in collaboration with the Australian Agency for International Development (AusAID) conducted a six day pre-IGC natural hazard modelling workshop for ASEAN and Pacific country delegates. The aim of the workshop was to improve their understanding of computational modelling techniques for volcanic ash, earthquake, tsunami and tropical cyclone hazards. The outcomes and lessons learnt will be discussed. Forty delegates from ASEAN and Pacific countries were invited to attend and receive training in one of four hazard modelling software programs relevant to the region: python-FALL3D (volcanic ash), ANUGA (tsunami), OpenQuake (earthquake) or TCRM (tropical cyclone). Relevance to their current employment area and the capacity to share the knowledge obtained through the training with colleagues were key criteria in selecting participants. Take home versions of the modelling software on USB stick and access to ongoing technical assistance from GA staff ensure that participants will be able to continue utilising the modelling software after the workshop. The knowledge gained will ultimately build the capacity of participants who have the responsibility of planning for potential natural hazards in their home countries.