AndreaBozzo/ceres-open-data-index huggingface dataset:
Airborne Electromagnetic Go-Map for the Paterson Region, WA and Pine Creek, NT

Geoscience Australia (GA) has recently completed two regional-scale Airborne Electromagnetic (AEM) surveys: one in the Paterson Region, WA; and the other in the Pine Creek region, NT. These surveys provide AEM data at line spacings of 200 m to 6 km covering an area greater than 110 000 km2. The surveys were designed to promote more detailed investigations by the mineral exploration industry. An inherent risk in using AEM surveys is that the depth of penetration of the primary electromagnetic field is highly variable. Although forward modelling is undertaken before the AEM campaign, the depth to which we can reliably invert the AEM signal to generate conductivity models is not known until after the survey is flown. 
In order to estimate the penetration depth of the AEM surveys, we calculate the depth of investigation (DOI) based on the GA layered-earth inversion algorithm, which is influenced by both conductivity measurements and reference model assumptions. We define the DOI as the maximum depth at which the inversion is influenced more by the conductivity data than the reference model. We present the DOI as a 2D grid across both the Paterson and Pine Creek AEM surveys. Labelled the 'AEM go-map', the DOI grid helps to promote AEM exploration by decreasing risk when industry undertakes follow-up surveys within these regions.

Tags: AEM, AU-NT, AU-WA, Airborne Electromagnetics, Conference Paper, Earth Sciences, External Publication, Published_External, geophysics, mineral exploration
Organization: Geoscience Australia Data
AUSGeoid98 v.1.0 data files: Waterloo (se52-03)

AUSGeoid98 data files contain a 2 minute grid of AUSGeoid98 data covering the Australian region, which you can use to interpolate geoid-ellipsoid separations for the positions required.You can use your own interpolation software, or you can use Geoscience Australia's Windows Interpolation software (Winter). The data files are text files in a standard format that cover the same area as standard topographic map areas. Files covering both 1:250,000 (approximately 100 x 150 km) and 1:1,000,000 (approximately 400 x 600 km) map areas are available. There is a 4 minute overlap on all sides of each area. Data format: AUSGeoid98 data files have a header record at the start of each file, to distinguish them from the superseded AUSGeoid93 data files. AUSGeoid98 data files show the geoid-ellipsoid separation to 3 decimal places, while the superseded AUSGeoid93 data files showed only 2 decimal places. AUSGeoid98 deflections of the vertical were computed from the geoid-ellipsoid separation surface, while the AUSGeoid93 deflections of the vertical were computed from OSU91A.

Tags: AU, AUSGeoid98, Geodesy, Geodetic Data, Published_External, dataset, geodesy
Organization: Geoscience Australia Data
Yardea 1:250 000 topographic map

This map is part of the series that covers the whole of Australia at a scale of 1:250 000 (1cm on a map represents 2.5 km on the ground) and comprises 513 maps. This is the largest scale at which published topographic maps cover the entire continent. Each standard map covers an area of 1.5 degrees longitude by 1 degree latitude or about 150 kilometres from east to west and 110 kilometres from north to south. There are about 50 special maps in the series and these maps cover a non-standard area. Typically, where a map produced on standard sheet lines is largely ocean it is combined with its landward neighbour. These maps contain natural and constructed features including road and rail infrastructure, vegetation, hydrography, contours (interval 50m), localities and some administrative boundaries. The topographic map and data index shows coverage of the sheets. Product Specifications Coverage: The series covers the whole of Australia with 513 maps. Currency: Ranges from 1995 to 2009. 95% of maps have a reliability date of 1994 or later. Coordinates: Geographical and either AMG or MGA (post-1993) Datum: AGD66, GDA94, AHD. Projection: Universal Traverse Mercator (UTM) Medium: Paper, flat and folded copies.

Tags: 250K scale, AU-SA, Published_External, Topographic Map, Topology, topography
Organization: Geoscience Australia Data
Cooper Basin region: Other resource potential data guide

Publicly available geological data in the Cooper Basin region are compiled to produce statements of existing knowledge for natural hydrogen, hydrogen storage, coal and mineral occurrences. This data guide also contains assessment of the potential for carbon dioxide (CO2) geological storage and minerals in the basin region.
Geochemical analysis of gas samples from petroleum in the basin shows various concentrations of natural hydrogen. However, the generation mechanism of the observed natural hydrogen concentration is still unknown.
The mineral occurrences are all found in the overlying basins and are small and of little economic significance. The Cooper Basin has some potential for base metal and uranium deposits due to somewhat suitable formation conditions, but the depth of the basin makes exploration and mining difficult and expensive. This also applies to coal, where there are no identified occurrences or resources in the Cooper Basin. However, if some were identified, the depth of the basin would probably make extraction uneconomic, with the potential exception of coal seam gas extraction.
CO2 geological storage assessment in the overlying Eromanga Basin suggests that most areas over the Cooper Basin (except over the Weena Trough in the south-west) are prospective for geological storage CO2.

Tags: Australia, CCS, Coal, Cooper Basin, EARTH SCIENCES, Hydrocarbons, Hydrogen, Minerals, Published_External, TEGI, Trusted environmental and geological information, Undiscovered resources
Organization: Geoscience Australia Data
Collara Mountains 1:50 000 topographic map

Product Specifications Coverage: Partial coverage, predominantly in northern Australia, along major transport routes, and other selected areas. About 1000 maps have been published to date. Currency: Ranges from 1968 to 2006. Coordinates: Geographical and UTM. Datum: AGD66, new edition WGS84; AHD. Projection: Universal Transverse Mercator UTM. Medium: Paper, flat copies only.

Tags: 50K scale, AU-NT, Published_External, Topographic Map, Topology, topography
Organization: Geoscience Australia Data
GSNSW Southern Darling Basin ppm uranium grid geodetic

The radiometric, or gamma-ray spectrometric method, measures the natural variations in the gamma-rays detected near the Earth's surface as the result of the natural radioactive decay of potassium (K), uranium (U) and thorium (Th). The data collected are processed via standard methods to ensure the response recorded is that due only to the rocks in the ground. The results produce datasets that can be interpreted to reveal the geological structure of the sub-surface. The processed data is checked for quality by GA geophysicists to ensure that the final data released by GA are fit-for-purpose.
This radiometric uranium grid has a cell size of 0.00082 degrees (approximately 84m) and shows uranium element concentration of the Southern Darling Basin Airborne Survey, NSW, 2005 in units of parts per million (or ppm). The data used to produce this grid was acquired in 2005 by the NSW Government, and consisted of 18763 line-kilometres of data at 400m line spacing and 60m terrain clearance.

Tags: Australia, EARTH SCIENCES, Earth sciences, GADDS2.0, NASVD, NCI, NSW, Published_External, U, airborne digital data, gamma-ray, geophysical survey, geophysics, grid, rad, radiometrics, raster, spectrometry, survey 1104, uranium
Organization: Geoscience Australia Data
The differential weathering of granitic rocks in Victoria, Australia

Landscape features such as positive relief and negative relief plutons and stepped topography are a result of differential weathering of granites.  Features of the granitic bedrock that may influence its differential weathering include fracturing, mineralogical composition, crystal size, and hydrothermal alteration.  A high modal biotite content and micro-fracturing increase susceptibility of granite to weathering in this region.  Granites that are more susceptible to weathering tend to form less prominent landscape features (such as negative relief plutons) and are usually covered by deep weathering profiles and fluvial sediments.  More resistant granites tend to form prominent landscape features, such as positive relief plutons and the crests of topographic steps.  Examples of differential weathering are taken from plutons throughout the state, although particular emphasis is given to examples from the Wilsons Promontory Batholith and the west Victorian Highlands.

Tags: Earth Sciences, GA Publication, Journal, Published_External, VIC
Organization: Geoscience Australia Data
Galiwinku Special 1:250 000 GIS Dataset

This data is part of the series of maps that covers the whole of Australia at a scale of 1:250 000 (1cm on a map represents 2.5km on the ground) and comprises 513 maps. This is the largest scale at which published topographic maps cover the entire continent. 
Data is downloadable in various distribution formats.

Tags: 250K scale, AU-NT, Earth Sciences, GIS Dataset, Published_External, dataset, topography
Organization: Geoscience Australia Data
Australian National Magnetic Data Collection

This data collection are comprised of magnetic surveys acquired across Australia by Commonwealth, State and Northern Territory governments and the private sector with project management and quality control undertaken by Geoscience Australia. 
Magnetic surveying is a geophysical method for measuring the intensity (or strength) of the Earth's magnetic field, which includes the fields associated with the Earth's core and the magnetism of rocks in the Earth's crust. 
Measuring the magnetism of rocks, in particular, provides a means for the direct detection of several different types of mineral deposits and for geological mapping. The magnetism of rocks depends on the volume, orientation and distribution of their constituent magnetic minerals (namely magnetite, monoclinic pyrrhotite, maghaemite and ilmenite). The instrument used in magnetic surveys is a magnetometer, which can measure the intensity of the magnetic field in nanoteslas (nT). 
Magnetic surveys in this collection have been acquired using aircraft or ship-mounted magnetometers and are a non-invasive method for investigating subsurface geology.

Tags: Australia-wide Airborne Geophysical Survey (AWAGS), GEOPHYSICS, Geophysics, HVC, HVC - High Value Collection, HVC_144635, Published_External, airborne, geomagnetism, gridded data, line data, magnetic anomaly, magnetic field, magnetics, magnetism, point located data, potential field, ship-borne, total magnetic intensity (TMI)
Organization: Geoscience Australia Data
Short Range 1:100 000 unpublished topographic map

At this scale 1cm on the map represents 1km on the ground. Each map covers a minimum area of 0.5 degrees longitude by 0.5 degrees latitude or about 54 kilometres by 54 kilometres. The contour interval is 20 metres.

Tags: 100K unpublished, AU-NT, Published_External, Topographic Map, Topology
Organization: Geoscience Australia Data
Fitzroy Crossing 1:50 000 topographic map

Product Specifications Coverage: Partial coverage, predominantly in northern Australia, along major transport routes, and other selected areas. About 1000 maps have been published to date. Currency: Ranges from 1968 to 2006. Coordinates: Geographical and UTM. Datum: AGD66, new edition WGS84; AHD. Projection: Universal Transverse Mercator UTM. Medium: Paper, flat copies only.

Tags: 50K scale, AU-WA, Published_External, Topographic Map, Topology, topography
Organization: Geoscience Australia Data
Australian petroleum accumulations report Bonaparte Basin, Northern Territory and Western Australia 1st edition

As at 1 January 1988 the Bonaparte Basin in northwestern Australia contained two economic, nine subeconomic and twenty two uneconomic petroleum accumulations, all of which were discovered since 1959 - all reservoired in sequences ranging from late Palaeozoic to Tertiary in age.
The petroleum accumulations of most relevance to petroleum exploration are those located within the Territory of Ashmore and Cartier Islands which are reservoired in rocks of Triassic and Jurassic age.  Other less significant accumulations located in the Petrel Sub-basin and Sahul Platform areas of the basin are reservoired in the Permian and Jurassic sequences.
The basin's estimated recoverable petroleum reserves as at 31 December 1987 comprised 5.992 x 106m3 of oil, 18.60 x 106m3 of natural gas liquids, and 111.189 x 109m3 of sales gas.  Production from the Jabiru oil accumulation commenced in August 1986 via the Jabiru Venture, a floating production facility.  A total of 1.528 x 106m3 of oil had been produced from the Jabiru accumulation up until 31 December 1988.
Development of the Challis oil accumulation is currently under consideration via a similar but slightly larger floating production facility.  Development of the Petrel and Tern gas accumulations have been the subject of detailed technical assessment but no firm commitment to proceed with development has been made.

Tags: AU-NT, AU-WA, Earth Sciences, GA Publication, Published_External, Report, petroleum exploration, petroleum geology
Organization: Geoscience Australia Data
SI 1010 Northern Approaches to Broome, WA. (HIPP) Bathymetry Acquisition (20200020S)

The Northern Approaches to Broome multibeam survey was acquired for the Australian Hydrographic Office (AHO) onboard the MV Bhagwan K  during the period 05 August– 02 October 2020. This was a contracted survey conducted by EGS as part of the Hydroscheme Industry Partnership Program. The survey area encompasses the northern approaches to Broome, WA located between the Talboys Rock and Gantheaume Point, Western Australia. Bathymetry data was acquired using a Kongsberg EM2040D 200-400 kHz and processed using QPS QINSy 9.2.3 processing software. The dataset was then exported as a 30m resolution, 32 bit floating point GeoTIFF grid of the survey area. This dataset is not to be used for navigational purposes.

Tags: AusSeabed, Bathymetric grids, Bathymetry, EARTH SCIENCES, Earth Science | Oceans | Bathymetry/Seafloor Topography | Bathymetry, HIPP, HVC_144641, Marine, Multibeam, Published_Internal
Organization: Geoscience Australia Data
Australian Tropical Cyclone Hazard Assessment Collection

The national Tropical Cyclone Hazard Assessment (TCHA) defines the severe wind hazard posed to Australia based on the frequency and intensity of tropical cyclones making landfall around the Australian coastline. 
Contact us at hazards@ga.gov.au if you need further information. 
URL: https://www.ga.gov.au/about/projects/safety/tcha 
Value: The TCHA provides vital information to emergency managers, town planners and infrastructure owners to plan and reduce the threat of tropical cyclone hazard on the Australian coast, and for the insurance industry to understand the tropical cyclone risk as an input to pricing insurance premiums. 
The TCHA is a key data source to calculate local cyclone impact models for the development of evidence-based disaster management plans, evacuation plans or inform infrastructure planning or mitigation strategies. High risk areas can be identified and prioritised for further analysis, or to extract scenarios to explore risk mitigation and community safety at a local and regional level. 
The TCHA includes a catalogue of synthetic tropical cyclone events (including tracks and wind fields), hazard profiles for selected locations across Australia, and maps of annual recurrence interval (ARI) wind speeds due to tropical cyclones. 
Geoscience Australia provides essential evidence based information to government and emergency managers around Australia to improve our communities' ability to prepare for, mitigate against and respond to natural disasters.
Scope: Continental scale.

Tags: DC2020, Data Package, EARTH SCIENCES, HVC - High Value Collection, HVC_144680, Hurricane, Natural Hazards, Published_External, Tropical Cyclone, Wind
Organization: Geoscience Australia Data
SA Gravity Survey 2004A4 (P200454), gravity point data

Gravity data measures small changes in gravity due to changes in the density of rocks beneath the Earth's surface. The data collected are processed via standard methods to ensure the response recorded is that due only to the rocks in the ground. The results produce datasets that can be interpreted to reveal the geological structure of the sub-surface. The processed data is checked for quality by GA geophysicists to ensure that the final data released by GA are fit-for-purpose.
 This SA Gravity Survey 2004A4 (P200454) contains a total of 118 point data values acquired at a spacing between 50 and 500 metres. The data is located in SA and were acquired in 2004, under project No. 200454 for None.

Tags: Australia, EARTH SCIENCES, Earth sciences, GADDS2.0, NCI, Published_External, SA, geophysical survey, geophysics, gravity, ground digital data, point, point located data, survey 200454
Organization: Geoscience Australia Data
Seabed environments, shallow sub-surface geology and connectivity, Petrel Sub-basin, Bonaparte Basin, Timor Sea: Interpretative report from marine survey GA0335/SOL5463

This report provides an analysis and evaluation of fluid seepage and habitats in two targeted areas of the Petrel Sub-basin, Bonaparte Basin, northern Australia, and provides scientific information on the seabed and shallow sub-surface geology as part of a study on the potential of this area for CO2 sequestration.
The Petrel Sub-basin, located beneath the modern Joseph Bonaparte Gulf, has been assessed by Geoscience Australia as part of the Australian Government funded National Low Emissions Coal Initiative (NLECI) to accelerate the development and deployment of low emissions coal technologies including geological sequestration of CO2.
This study is the first undertaken by Geoscience Australia that integrates seafloor and shallow sub-surface geology data to provide information on the potential to sequester CO2 in sub-surface geological reservoirs and their suitability for purpose.
In particular, this work involved the integration of data from seabed habitat characterisation studies and sub-surface geological studies to determine if evidence for fluid seepage from depth to the seabed exists at the two study sites within the Petrel Sub-basin.
No evidence for hydrocarbons from depth were found. However, fluid seepage at the seabed has been and potentially is occurring; this result stemming from observations on seabe geomorphology, sedimentology, chemistry, and acoustic sub-bottom profiles.

Tags: GA Publication, Marine Geoscience, Published_External, Record, geological storage of CO2, geology, habitat, marine, marine environmental baselines, seabed
Organization: Geoscience Australia Data
Fergusson River 1:250 000, R502 historical topographic map

The R502 series of maps has been replaced by the National Topographic Map Series (NTMS). The R502 series consists of 542 map sheets and covers Australia at a scale of 1:250,000. It was compiled from aerial photography, but only about one quarter of the series was contoured. The standard sheet size is 1 degree of latitude by 1.5 degrees of longitude. Transverse Mercator map projection and Clark 1858 datum were used. Coverage of the country was completed in 1968.

Tags: 250K scale, AU_NT, Published_External, Topographic Map, Topology
Organization: Geoscience Australia Data
Practical uses of chemical modelling-defining new exploration targets in sedimentary basins

Numerical simulations of geochemical processes can help in the design of exploration programs for a variety of geological environments.  Chemical modelling can be used to predict (i) the maximum metal-carrying capacity of hydrothermal fluids, (ii) the alteration and vein assemblages that will form during fluid flow along faults and aquifers, and (iii) the likely sequence of mineral deposition and relative abundance of mineral phases precipitated in the trap environment.  We have numerically modelled the transport and deposition of 20 chemical components in 4 high-temperature (250Â°C) metalliferous brines (10 wt% eq. NaCl), focusing on processes that may occur in sedimentary basins. The results show that sign ificant amounts of base metals (&gt; 1 ppm) can be transported in acidic oxidised, alkaline oxidised, and acidic reduced brines. Alkaline, reduced brines are predicted to be incapable of carrying sufficient quantities of base metals to be important in the formation of sediment-hosted base-metal deposits. Hematite-bearing quartz sandstones can be unreactive aquifers for oxidised metalliferous brines, allowing metals to remain in solution during transport. Potassic and/or propylitic alteration assemblages are predicted to form when the brines interact with mafic volcanics. High-temperature mineralised brines can potentially migrate long distances (&gt; 1 km) along faults without dumping their base-metal load, provided the fluids remain chemically isolated from the surrounding wall rocks (e.g. silica mantling). Cooling and/or boiling of metal-rich brines during cross-stratal transport may result in the precipitation of barren quartz veins with traces of hematite or pyrite, depending on the oxidation state of the initial fluid.  For the trap environment, mixing of metalliferous brines with anoxic seawater is predicted to be efficient at precipitating Zn-Pb-rich massive sulphide mineralisation. Mixing of the same brines with oxidised seawater can result in the formation of siliceous Cu-Ag-rich exhalites. Replacement-style Zn-Pb-rich sulphide mineralisation is predicted to precipitate when reduced acidic brines interact with pyritic dolomitic sediments. Complex alteration assemblages are predicted to form concurrently with base-metal sulphide deposition when the replacement process involves oxidised brines.  Our chemical modelling technique allows rapid testing of various hypotheses about trap sites and depositional mechanisms. It is probably most useful in the project generation stage of a regional exploration program.

Tags: Earth Sciences, GA Publication, Journal, Published_External
Organization: Geoscience Australia Data
Auvergne 1:250 000 GIS Dataset

This data is part of the series of maps that covers the whole of Australia at a scale of 1:250 000 (1cm on a map represents 2.5km on the ground) and comprises 513 maps. This is the largest scale at which published topographic maps cover the entire continent. 
Data is downloadable in various distribution formats.

Tags: 250K scale, AU-NT, Earth Sciences, GIS Dataset, Published_External, dataset, topography
Organization: Geoscience Australia Data
Mt Barker, WA, 2011 (P1245), magnetic line data, AWAGS levelled

Total magnetic intensity (TMI) data measures variations in the intensity of the Earth's magnetic field caused by the contrasting content of rock-forming minerals in the Earth crust. Magnetic anomalies can be either positive (field stronger than normal) or negative (field weaker) depending on the susceptibility of the rock. The data are processed via standard methods to ensure the response recorded is that due only to the rocks in the ground. The results produce datasets that can be interpreted to reveal the geological structure of the sub-surface. The processed data is checked for quality by GA geophysicists to ensure that the final data released by GA are fit-for-purpose.
 These line dataset from the South West (Mt Barker and Lake Muir), WA, 2011 survey were acquired in 2012 by the WA Government, and consisted of 126090 line-kilometres of data at a line spacing between 200m and 200m, and 50m terrain clearance. To constrain long wavelengths in the data, an independent data set, the Australia-wide Airborne Geophysical Survey (AWAGS) airborne magnetic data, was used to control the base levels of the survey data. This survey data is essentially levelled to AWAGS.

Tags: AWAGS, Australia, EARTH SCIENCES, Earth sciences, GADDS2.0, Published_External, WA, airborne digital data, geophysical survey, geophysics, line, magnetic, magnetics, magnetism and palaeomagnetism, survey 1245, vector
Organization: Geoscience Australia Data