AndreaBozzo/ceres-open-data-index huggingface dataset:
Emplacement ages of granitic rocks in the Coen Inlier (Cape York): implications for local geological evolution and regional correlation

New zircon ion-microprobe U-Pb analyses define two major, short-lived episodes of Palaeozoic magmatism within the Coen Inlier, north Queensland.  The younger occurred at about 284 Ma, when the Weymouth Granite and Twin Humps Adamellite were emplaced.  Previously published younger K-Ar ages for this event are probably a consequence of radiogenic Ar loss from chlorite-rich biotite concentrates.  Most of the granites in the inlier were emplaced during a brief intrusive episode in the Late Silurian - Early Devonian: ages for previously defined units include 402Â±7 Ma (Flyspeck Granodiorite), 408Â±6 Ma (Blue Mountains Adamellite), 406Â±7 Ma (Kintore Adamellite), 407Â±8 Ma (Morris Adamellite) and 407Â±5 Ma (Lankelly Adamellite).  Restitic (or xenocrystic) zircon ages and Sm-Nd isotopic data are consistent with the derivation of both generations of granites from Precambrian crustal components similar to those which produced granites of closely similar ages in the Georgetown Inlier.  Tectonothermal activity at ~1600 Ma was probably part of quasi-continuous activity extending over several hundred million years. A 2500 Ma crustal component is also identified. Despite the similarities in the ages of the Palaeozoic granites in the Coen and Georgetown Inliers, and their closely comparable isotopic characteristics, it is not possible to conclude that the two terranes are part of a single geological entity. This will only be possible if Precambrian metamorphic or igneous rocks, which are so widespread in the Georgetown region, are identified in the Coen Inlier. Although the metasedimentary rocks of the Coen Inlier were derived from weathering and erosion of a Precambrian terrane, the current isotopic data cannot discriminate between Proterozoic, Early Palaeozoic and even Middle Palaeozoic ages of deposition for the metamorphosed sedimentary rocks.

Tags: Earth Sciences, GA Publication, Journal, Published_External, QLD
Organization: Geoscience Australia Data
Goulburn dose rate 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. The terrestrial dose rate grid is derived as a linear combination of the filtered K, U and Th grids. A low pass filter is applied to this grid to generate the filtered terrestrial dose rate grid.
This Goulburn dose rate grid geodetic has a cell size of 0.00052 degrees (approximately 53m) and shows the terrestrial dose rate of the Goulburn, NSW, 1996. The data used to produce this grid was acquired in 1996 by the NSW Government, and consisted of 69424 line-kilometres of data at 250m line spacing and 80m terrain clearance.

Tags: Australia, EARTH SCIENCES, Earth sciences, GADDS2.0, K, NASVD, NCI, NSW, Published_External, Th, U, airborne digital data, dose, dose rate, gamma-ray, geophysical survey, geophysics, grid, potassium, rad, radiometrics, raster, rate, spectrometry, survey 650, thorium, uranium
Organization: Geoscience Australia Data
SA Gravity Survey 1995A7 (P199558), 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 1995A7 (P199558) contains a total of 128 point data values acquired at a spacing of 450 metres. The data is located in SA and were acquired in 1995, under project No. 199558 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 199558
Organization: Geoscience Australia Data
Glenhaughton 1:100 000 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. Many maps are supplemented by hill shading. These maps contain natural and constructed features including road and rail infrastructure, vegetation, hydrography, contours, localities and some administrative boundaries. Product Specifications Coverage: Australia is covered by more than 3000 x 1:100 000 scale maps, of which 1600 have been published as printed maps. Unpublished maps are available as compilations. Currency: Ranges from 1961 to 2009. Average 1997. Coordinates: Geographical and either AMG or MGA coordinates. Datum: AGD66, GDA94; AHD Projection: Universal Transverse Mercator UTM. Medium: Printed maps: Paper, flat and folded copies. Compilations: Paper or film, flat copies only.

Tags: 100K scale, AU-QLD, Published_External, Topographic Map, Topology, topography
Organization: Geoscience Australia Data
Port Phillip Bay-Underwater Gravity (P197134), 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 Port Phillip Bay-Underwater Gravity (P197134) contains a total of 11 point data values acquired at a spacing between 1000 and 4000 metres. The data is located in VIC and were acquired in 1970, under project No. 197134 for Geosurveys Australia Pty Ltd.

Tags: Australia, EARTH SCIENCES, Earth sciences, GADDS2.0, NCI, Published_External, VIC, geophysical survey, geophysics, gravity, ground digital data, point, point located data, survey 197134
Organization: Geoscience Australia Data
Waldoona 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: AU-SA, Orthophoto Map, Published_External, Topographic Map, Topology, topography
Organization: Geoscience Australia Data
L157 Batten Trough (McArthur Basin) seismic survey, NT, 2002

Trace Energy Services was contracted by the Australian National Seismic Imaging Resource (ANSIR) to conduct the Batten Trough Seismic Survey in the Northern Territory. The survey consisted of two lines totalling 127.60 kms. The data were collected in late 2002 as part of a study to examine the fundamental basin architecture of the Southern McArthur Basin and the nature of underlying basement. Much of the seismic program was designed to test geometric models in this area, including tectonostratigraphy, fault systems and basement structure. The results have wider applicability because the basin is considered to be a little deformed analogue of the Western Succession of Mt Isa.

Tags: AU-NT, HVC_144637, Published_External, Seismic Data seismic survey, Seismology and Seismic Exploration, geophysics, mineral exploration, petroleum exploration, seismic reflection, seismic sections
Organization: Geoscience Australia Data
GSWA Hickman Crater Potassium 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 potassium grid has a cell size of 5e-05 degrees (approximately 5m) and shows potassium element concentration of the South Pilbara, Hickman Crater, WA, 2011 in units of percent (or %). The data used to produce this grid was acquired in 2012 by the WA Government, and consisted of 134742 line-kilometres of data at 400m line spacing and 60m terrain clearance.

Tags: Australia, EARTH SCIENCES, Earth sciences, GADDS2.0, K, NCI, Published_External, WA, airborne digital data, gamma-ray, geophysical survey, geophysics, grid, potassium, rad, radiometrics, raster, spectrometry, survey 1233
Organization: Geoscience Australia Data
Mount Peake-Crawford - ground elevation geoid grid (laser)

Digital Elevation data record the terrain height variations from the processed point- or line-located data recorded during a geophysical survey. This Mount Peake-Crawford - ground elevation geoid grid (laser) is elevation data for the NTGS Mount Peake-Crawford Magnetic, Radiometric and Elevation Survey, NT 2019. This survey was acquired under the project No. 1319 for the geological survey of NT. The grid has a cell size of 0.00019 degrees (approximately 20m).  This grid contains the ground elevation relative to the geoid for the NTGS Mount Peake-Crawford Magnetic, Radiometric and Elevation Survey, NT 2019. It represents the vertical distance from a location on the Earth's surface to the geoid. The data are given in units of meters. The processed data is checked for quality by GA geophysicists to ensure that the final data released by GA are fit-for-purpose.

Tags: Australia, DEM, EARTH SCIENCES, Earth sciences, Elevation, GADDS2.0, NCI, NT, Published_External, digital data, geoid, geophysical survey, geophysics, grid, raster, survey 1319, terrain
Organization: Geoscience Australia Data
Shady Camp 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
Cootamundra, NSW, 1975 (P422), 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 Cootamundra, NSW, 1975 survey were acquired in 1975 by the NSW Government, and consisted of 12490 line-kilometres of data at 1500m line spacing and 150m 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, NSW, Published_External, airborne digital data, geophysical survey, geophysics, line, magnetic, magnetics, magnetism and palaeomagnetism, survey 422, vector
Organization: Geoscience Australia Data
AUSGeoid98 v.1.0 data files: Millungera (se54-15)

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
Mount Whelan 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-QLD, Earth Sciences, GIS Dataset, Published_External, dataset, topography
Organization: Geoscience Australia Data
On the connection of the apparent proper motion and the VLBI structure of compact radio sources

Many of the compact extragalactic radio sources that are used as fiducial points to define the celestial reference frame are known to have proper motions detectable with long-term geodetic/astrometric very long baseline interferometry (VLBI) measurements. These changes can be as high as several hundred microarcseconds per year for certain objects. When imaged with VLBI at milliarcsecond (mas) angular resolution, these sources (radio-loud active galactic nuclei) typically show structures dominated by a compact, often unresolved “core” and a one-sided “jet.” The positional instability of compact radio sources is believed to be connected with changes in their brightness distribution structure. For the first time, we test this assumption in a statistical sense on a large sample rather than on only individual objects. We investigate a sample of 62 radio sources for which reliable long-term time series of astrometric positions as well as detailed 8 GHz VLBI brightness distribution models are available. We compare the characteristic direction of their extended jet structure and the direction of their apparent proper motion. We present our data and analysis method, and conclude that there is indeed a correlation between the two characteristic directions. However, there are cases where the ∼1–10 mas scale VLBI jet directions are significantly misaligned with respect to the apparent proper motion direction.
Citation: Moór, A., Frey, S., Lambert, S. B., Titov, O. A., &amp; Bakos, J. (2011). On the connection of the apparent proper motion and the VLBI structure of compact radio sources. The Astronomical Journal, 141(6), 178. 
https://doi.org/10.1088/0004-6256/141/6/178

Tags: BL Lacertae objects: individual (OJ 287), Earth Sciences, External Publication, Published_External, galaxies: active, geodesy, interferometric, quasars: general, radio continuum: galaxies, reference systems
Organization: Geoscience Australia Data
Galloway 1:100 000 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. Many maps are supplemented by hill shading. These maps contain natural and constructed features including road and rail infrastructure, vegetation, hydrography, contours, localities and some administrative boundaries. Product Specifications Coverage: Australia is covered by more than 3000 x 1:100 000 scale maps, of which 1600 have been published as printed maps. Unpublished maps are available as compilations. Currency: Ranges from 1961 to 2009. Average 1997. Coordinates: Geographical and either AMG or MGA coordinates. Datum: AGD66, GDA94; AHD Projection: Universal Transverse Mercator UTM. Medium: Printed maps: Paper, flat and folded copies. Compilations: Paper or film, flat copies only.

Tags: 100K scale, AU-QLD, Published_External, Topographic Map, Topology, topography
Organization: Geoscience Australia Data
Lake Eyre - TMI RTP grid (AWAGS)

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.
This magnetic grid has a cell size of 0.0004 degrees (approximately 41m).The data are in nanoTesla (or nT). The data used to produce this grid was acquired in 2017 by the SA Government, and consisted of 92215 line-kilometres of data at 200m line spacing and 60m terrain clearance. To constrain long wavelengths in the grid, an independent data set, the Australia-wide Airborne Geophysical Survey (AWAGS) airborne magnetic data, was used to control the base levels of the survey grid. This survey grid is essentially levelled to AWAGS.The data has had a variable reduction to the pole applied to centre the magnetic anomaly over the magnetised body. The VRTP processing followed a differential reduction to pole calculation up to 5th order polynomial. Magnetic inclination and declination were derived from the IGRF-11 geomagnetic reference model using a data representative date and elevation representative of the survey.

Tags: AWAGS, Australia, EARTH SCIENCES, Earth sciences, GADDS2.0, NCI, Published_External, RTP, SA, TMI, airborne digital data, geophysical survey, geophysics, grid, mag, magnetics, magnetism, palaeomagnetism, raster, reduced to the pole, survey 1302, total magnetic intensity
Organization: Geoscience Australia Data
From National to Local: GA's Tropical Cyclone Hazard Assessment in Action

"History provides a limited picture of what can happen from tropical cyclones (TCs).  Take the example of Port Hedland or Townsville, with limited numbers of close TC impacts, especially in recent decades, where many communities have gone through rapid growth. 
How could emergency services in these towns prepare adequately for a major TC strike with no recent experience?  How do they know if they have sufficient resources?  Will they need to call in resources from other regions or further afield? 
In this presentation, we will discuss two parts of this problem – developing plausible scenarios of TCs for use in exercises and then evaluating the impacts of a selection of these events to guide planning and response actions for emergency services. 
GA’s Tropical Cyclone Hazard Assessment (TCHA) provides the backbone of impact scenario modelling – a stochastic catalogue of 10,000 years of plausible TC events that users can delve into. 
We connect the scenarios to our extensive built environment data collection and the corresponding vulnerability modelling capability to deliver tangible information on the impacts that as-yet unseen events could deliver to communities around our northern coastline.

Tags: EARTH SCIENCES, Published_External, Wednesday Seminar, cyclones, natural hazards
Organization: Geoscience Australia Data
AUSGeoid98 v.1.0 data files:  (sj57-10)

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