AndreaBozzo/ceres-open-data-index huggingface dataset:
Lock, stock and 42 smoking aquifers - unifying Australian groundwater data and knowledge in the National Hydrogeological Inventory

This presentation is about the National Hydrogeological Inventory, developed as part of Geoscience Australia's national-scale groundwater research efforts in the Exploring for the Future (EFTF) program. The presentation is part of the 2024 Distinguished Geoscience Australia Lecture (DGAL) series.

One of Geoscience Australia's strategic drivers is to Improve understanding of Australia's groundwater systems to support sustainable management and help to secure our water resources to optimise and sustain their use. Aligned with this key objective, and as part of the EFTF program, Geoscience Australia developed and delivered the first comprehensive update to the Hydrogeology of Australia map and supporting report since first published more than 35 years ago.
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Known as the National Hydrogeological Inventory (NHI), this new online mapping application delivers consistent national-scale synthesis of hydrogeological and related data and information for the nation's 42 major groundwater provinces. Accessible via the Geoscience Australia Data Discovery Portal, the NHI provides an enhanced and updated picture of groundwater systems across Australia, giving us a broader understanding of the communities, industries, and environments that rely on access to groundwater. This presentation uncovers the story behind the development of the inventory, looking at why it was developed, the type of information it contains, and plans for further improvements as part of the new Resourcing Australia's Prosperity Initiative.
 

Tags: Distinguished Geoscience Australia Lecture, EFTF – Exploring for the Future, Earth Sciences, National Groundwater Systems, National Hydrogeological Inventory, Outreach, Published_External, Wednesday Seminars, groundwater, hydrogeology
Organization: Geoscience Australia Data
On the isostatic compensation of Australia topography

The depth of isostatic compensation and the strength of the lithosphere are investigated by calculating isostatic anomalies for a range of isostatic models. The models are of three-dimensional topography on a spherical earth. In all areas compensation of topography appears to be complete at the level of the lowest part of the crust. In southeast Australia the preferred isostatic model is that of Airy, with a standard sea-level crust of thickness 35-45 km. For this model, isostatic anomalies in areas measuring 0.5Â° x 0.5Â° have a low standard deviation of 90 micro m s^-2; equivalent to 80 m in elevation. The crustal thicknesses calculated from this model agree well with thicknesses found from recent seismic-refraction work. In the southeastern highlands there is evidence from physiographic studies for uniform uplift of about 1 km during the last 90 Â± 30 m.y. The preferred model is for this uplift to be an isostatic response to underplating of the crust. The underplating is thought to have taken place at a constant rate since 90 m.y. ago; the underplated material is the 20 km of abnormally high velocity material that forms the basal part of the crust in this area. Away from southeast Australia no isostatic models could be found that gave small isostatic anomalies, and the best models are not consistent with crustal structure found by seismic methods. In these areas the topography varies gradually, and the gravity effect of this topography and its compensation seems to be masked by the effect of a correlation between altitude and mean crustal density. This correlation is partly the result of the lowlands usually being underlain by thicker, low-density sediments, and partly to the crust below sediments having a higher mean density in the high altitude areas.

Tags: AUS, Earth Sciences, GA Publication, Journal, Published_External
Organization: Geoscience Australia Data
L146 Eastern Lachlan seismic survey, NSW, 1997 Stacked seismic data and images for lines 97AGSEL1, 97AGSEL2, and 97AGSEL3

The Australian Geodynamics Cooperative Research Centre (AGCRC), through Geoscience Australia conducted a seismic reflection survey in various localities in the eastern Lachlan Orogen of NSW, from October to November 1997. The objectives of the project were to obtain a better understanding of sub-surface geology at a regional and local scale and, in particular, provide more information on: 1. basement control on basin development 2. regional crustal thickness and major features within the basement 3. stratigraphic architecture of the basins 4. structural architecture of the basins 5. the location of fluid flow pathways The seismic survey acquired 105 km of 10 fold CMP (common midpoint) deep (20 second TWT) reflection seismic data along three traverses over a 6 week acquisition period. In addition to the seismic data, gravity observations were made at 300 m intervals along the lines. Drill cutting samples were also collected for analysis.

Tags: AU-NSW, HVC_144637, Published_External, Seismic Data seismic survey, Seismology and Seismic Exploration, geophysics, seismic reflection, seismic sections
Organization: Geoscience Australia Data
GA Data Cube - Using data from the past and present to inform the future

This video explains the concept behind Geoscience Australia's Data Cube, a new way of organising, analysing and managing the large amounts of data collected from Earth Observation Satellites (EOS) studies over time. The Data Cube facilitates efficient data analysis and enables users to interrogate Australia's EOS data from the past and present. It is hoped that the Data Cube will become a useful tool used by remote sensing scientists and data analysts to extract information to support for informing future decision-making and policy development within Australia.

Tags: All, Environmental Science and Management, Movie, Multimedia, Published_External
Organization: Geoscience Australia Data
Wingilpin 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-SA, Published_External, Topographic Map, Topology, topography
Organization: Geoscience Australia Data
Marrilla 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
AUSGeoid98 v.1.0 data files:  (sb53)

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
Carbon and hydrogen isotopes of the wet gases produced by gamma-ray-induced polymerisation of methane: Insights into radiogenic mechanism and natural gas formation

The 60Co gamma ray radiolysis of methane was undertaken at room temperature and at a low proportion of methane conversion to observe initial polymerisation reactions in the formation of C2─C5 saturated hydrocarbon gases. The gamma ray radiolysis product follows a Schulz-Flory distribution model for the straight-chained C2+ alkane gases consistent with chain propagation by addition of C1 intermediates. The high relative concentration of branched isomers suggests the total product distribution is likely controlled by propagation reactions involving mainly radical intermediates. In particular, the pentane isomers show a relative dominance of the branched isomers with sub-equal amounts of iso-pentane and neo-pentane. Carbon isotopes of the C2─C5 wet gases are all depleted in 13C relative to δ13C methane reactant with δ13C C2 &lt; δ13C C3 and carbon isotope reversals in the C3─C5 gases while only ethane and neo-pentane are depleted in 2H compared to δ2H of the starting methane. As such, these molecular and isotopic features show similar characteristics to abiogenic wet gases found in terrestrial settings.
Bibliographic Citation: Boreham, C. J., &amp; Davies, J. B. (2020). Carbon and hydrogen isotopes of the wet gases produced by gamma-ray-induced polymerisation of methane: Insights into radiogenic mechanism and natural gas formation. Radiation Physics and Chemistry, 168, 108546.
https://doi.org/10.1016/j.radphyschem.2019.108546

Tags: Abiogenic hydrocarbons, Australian natural gas, Published_External, carbon and hydrogen isotope reversal, gamma radiolysi, helium, methane, neo-pentane
Organization: Geoscience Australia Data
Penola, SA, 1992 (P592), radiometric line data, AWAGS levelled

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 Penola, SA, 1992 (P592), radiometric line data, AWAGS levelled were acquired in 1992 by the SA Government, and consisted of 14160 line-kilometres of data at 1500m line spacing and 80m 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, NASVD, Published_External, SA, airborne digital data, gamma-ray, geophysical survey, geophysics, line, potassium, radiometrics, spectrometry, survey 592, thorium, uranium, vector
Organization: Geoscience Australia Data
An analysis of the geomagnetic diurnal variation during the International Geophysical Year

A spherical harmonic analysis has been made of the quiet-day diurnal variation of the geogmagnetic field during the IGY, based on mean hourly values from 64 observatories. Each of the 18 months has been analysed separately, and the coefficients have been averaged over each of four seasons. Fourier coefficients were expressed as functions of latitude and longitude by the Gram-Schmidt method, and non-significant coefficients of the orthogonal functions were discarded. The dependence on longitude was restricted so that only smooth departures from the local time dependence were allowed. The potential was derived by averaging that found from the east and north components. External and internal potentials were derived from the surface potential and vertical component. Ratios of, and phase differences between, the external and internal potentials were derived for each harmonic. They were also computed as functions of latitude and longitude, but no significant geographical distribution was found. The ratios and phase differences generally agree fairly well with those derived from earlier analyses. The amplitudes of the harmonics are generally about twice as great as those derived by Chapman for the 1905 data. This is probably because 1957 and 1958 were years of very high sunspot number. Tables of coefficients and maps of the elements and current functions are given.

Tags: Bulletin, Earth Sciences, GA Publication, Published_External, geophysics
Organization: Geoscience Australia Data
Barrow Island 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
Silvergrass Plains Hamersley Iron Province Gravity (P197731), 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 Silvergrass Plains Hamersley Iron Province Gravity (P197731) contains a total of 1763 point data values acquired at a spacing between 100 and 1200 metres. The data is located in WA and were acquired in 1977, under project No. 197731 for Hamersley Exploration Pty Ltd.

Tags: Australia, EARTH SCIENCES, Earth sciences, GADDS2.0, NCI, Published_External, WA, geophysical survey, geophysics, gravity, ground digital data, point, point located data, survey 197731
Organization: Geoscience Australia Data
Australia Minerals Article and Advert for AEGC 2018

Australia Minerals is a collaboration of Australia's federal, state and Northern Territory government geoscience agencies working together to offer ground-breaking information, unrivalled expertise and a record of innovation that supports mineral explorers to realise investment opportunities.
Australia is one of the world's biggest minerals exploration markets with huge remaining brownfields and greenfields discovery potential. With readily accessible geoscience expertise and research support, Australia Minerals enables investors to tap into Australia's diverse geological potential in a range of commodities to achieve one of the highest exploration returns.
Australia's business, policy and investment processes, proven record of environmental, social, financial, legal and political stability, and its proximity to Asia's fast-growing markets, make it the smart, secure choice for exploration investment.
Article for the AEGC 2018: First Australian Exploration Geoscience Conference

Tags: Australian Minerals, EARTH SCIENCES, Published_External, Realise the Opportunity, mineral investments
Organization: Geoscience Australia Data
Georgina-Arunta Magnetotelluric Survey Processed EDI files and support data from sites associated with 09GA-GA1 seismic traverse

Magnetotelluric survey  data acquired in association with the L192 Georgina-Arunta Deep Crustal Seismic Survey. This survey was funded through the Onshore Energy Security Program using the Auscope equipment from the ANSIR pool. The aim of the survey was to produce a two-dimensional image of electrical conductivity structure of the crust and upper mantle over the western Georgina Basin and the Arunta region of the Northern Territory. This information is complementary to the reflection seismic and gravity data acquired along the 09GA-GA1 traverse.
Data are supplied as EDI files with support information.

Tags: AU-NT, Geophysics, HVC_144686, Magnetotelluric, Published_External, cultural boundaries, geophysics, magneto-tellurics, mineral exploration, petroleum exploration
Organization: Geoscience Australia Data
Hogarth 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-SA, Published_External, Topographic Map, Topology, topography
Organization: Geoscience Australia Data
NTData (digital geology of the Northern Territory), Elkedra

These data are a digital representation of information depicted on printed maps from the Australia 1:250 000 Geological Series produced by AGSO and the Northern Territory Geological Survey (NTGS) between 1963 and 1998.  The data are in a tiled format 
and are not seamless, although basic edgematching has been done where possible.  Tiles are arranged according to the standard Australian 1:250 000 sheet breakup.  The complete dataset is comprised of the 90 tiles covering the Northern Territory.

Tags: AU-NT, Earth Sciences, GIS Dataset, Published_External, Regional, dataset, geology
Organization: Geoscience Australia Data
AUSGeoid98 v.1.0 data files: Yalgoo (sh50-02)

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
Forbes-Narrandera Gravity (P196539), 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 Forbes-Narrandera Gravity (P196539) contains a total of 66 point data values acquired at a spacing of 3200 metres. The data is located in NSW and were acquired in 1965, under project No. 196539 for Department of Mines (New South Wales).

Tags: Australia, EARTH SCIENCES, Earth sciences, GADDS2.0, NCI, NSW, Published_External, geophysical survey, geophysics, gravity, ground digital data, point, point located data, survey 196539
Organization: Geoscience Australia Data
Recharge and discharge estimation in data poor areas: Scientific reference guide

This project involved two phases, the first of which compiled reviews of recharge and discharge studies that have been undertaken in Australia. It also involved preliminary identification of the parameters (climate, soils, regolith, near-surface geology, landforms, vegetation etc.) that determine recharge and discharge rates along with a review of the appropriate scale mapping approaches available for these parameters. The second phase of the project utilised empirical relationships derived from data collected in Phase 1 of the project in a decision tree methodology that guides the user to the most appropriate estimate for recharge/discharge given the data availability.
This report documents the various methods of estimating recharge and/or discharge using specifically developed Excel spreadsheets and associated input GIS data.

Tags: AU, Earth Sciences, GA Publication, GIS, Published_External, Record, drainage, geoscience, groundwater, land cover
Organization: Geoscience Australia Data
GSNSW Exploration NSW Area F Brewarrina thorium 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 thorium grid has a cell size of 0.00121 degrees (approximately 125m) and shows thorium element concentration of the NSW DMR, Discovery 2000, 1994-95, AREA F, Brewarrina in units of parts per million (or ppm). The data used to produce this grid was acquired in 1995 by the NSW Government, and consisted of 51199 line-kilometres of data at 250m line spacing and 60m terrain clearance.

Tags: Australia, EARTH SCIENCES, Earth sciences, GADDS2.0, NASVD, NCI, NSW, Published_External, Th, airborne digital data, gamma-ray, geophysical survey, geophysics, grid, rad, radiometrics, raster, spectrometry, survey 736, thorium
Organization: Geoscience Australia Data
Roe River 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
Geoscience Australia Landsat Fractional Cover Collection 3

Fractional cover data can be used to identify large scale patterns and trends and inform evidence based decision making and policy on topics including wind and water erosion risk, soil carbon dynamics, land management practices and rangeland condition.
This information is used by policy agencies, natural and agricultural land resource managers, and scientists to monitor land conditions over large areas over long time frames.
Fractional Cover (FC), developed by the Joint Remote Sensing Research Program, is a measurement that splits the landscape into three parts, or fractions:

green (leaves, grass, and growing crops)
brown (branches, dry grass or hay, and dead leaf litter)
bare ground (soil or rock)
Digital Earth Australia (DEA) uses Fractional Cover to characterise every 30 m square of Australia for any point in time from 1987 to today.


Tags: EARTH SCIENCES, Published_External, bare soil, green vegetation, land and vegetation, non-green vegetation
Organization: Geoscience Australia Data