AndreaBozzo/ceres-open-data-index huggingface dataset:
Explosion seismic profiles, and implications for crustal evolution, in southeastern Australia

The interpreted velocity-depth structure in the crust of the Lachlan Fold Belt in southeastern Australia indicates that velocity gradients, rather than discontinuous velocity changes, characterise the region. The velocity-depth morphology varies across the region. In the upper crust at depths less than 12 km, there is evidence in three areas for velocity decreases within a general velocity increase from about 5.6 km/s to 6.3 km/s. In the middle crust (depth range 16 km to about 35 km) a low velocity zone is interpreted within a general increase in velocity from 6.3 km/s to greater than 7 km/s; the prominence of the low velocity zone varies throughout the region. The upper mantle velocity is in the range 8.02 to 8.05 km/s; this velocity is reached at a depth slightly greater than 50 km under the highest topography in Australia, and at depths between 40 and 50 km elsewhere.  There are similarities between the velocity-depth structure in southeastern Australia and that in the Appalachian Orogen of North America. Geochemical mixing and/or compositional inhomogeneity is a likely reason for the velocity-depth structures, and such inhomogeneity is probably still influencing current moderate earthquake activity and continuing highland uplift. In pre-Ordovician times the region of the Lachlan Fold Belt probably consisted of continental crust which was submerged and thickened by episodic crustal development similar to the processes which resulted in the Appalachian Orogen.

Tags: Earth Sciences, GA Publication, Journal, NSW, Published_External, VIC
Organization: Geoscience Australia Data
Preliminary post-cruise report : hydrocarbon gas geochemistry in sediments of the offshore Otway and Gippsland Basin: Project 9131.20 BMR Fossil Fuels Project

During April/May 1988, the BMR research vessel 'Rig Seismic' carried out a 21 day geochemical and sedimentological research program in the Otway (17 days) and Gippsland (4 days) Basins. Light hydrocarbon gases (C1-C6) were measured in sediments at 342 locations on thecontinental shelf and upper continental slope. Thermogenic hydrocarbons were identified in near-surface sediments at forty-two locations in the Otway (32) and Gippsland (10) Basins. The major results from the Otway Basin include:


Evidence of thermogenic hydrocarbon sediments was found at seven locations on the Crayfish Platform, seven locations on the Mussel Platform and eighteen locations in the VolutaTrough.


Wet gas contents ([C2-C4/C1-C4] x 100), which provide some indication of both hydrocarbon source type and maturity,are highest on the basin margins, i.e. the Crayfish and Mussel Platforms. Wet gas contents were consistently lower in the Voluta Trough.


Total C1-C4 gas concentrations were higher in the Voluta Trough than on the basin margins, probably because of more intense near-surface faulting in the trough.


The geochemical data, when integrated with thermal maturation modelling and well data, suggest that the principal liquidhydrocarbon source rocks are located at the base of the Early Cretaceous Otway Group (i.e. basal Pretty Hill Sandstone). The Late Cretaceous Sherbrook Group appears to be gas-prone.


Preliminary data from the Gippsland Basin identify ten locations which show evidence of thermogenic hydrocarbons in near-surface sediments.

Tags: AU-TAS, AU-VIC, Earth Sciences, GA Publication, Published_External, Record, geochemistry, hydrocarbons, marine, marine survey
Organization: Geoscience Australia Data
GSWA South Kimberley 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 0.00083 degrees (approximately 90m) and shows thorium element concentration of the South Kimberley, WA, 2008 in units of parts per million (or ppm). The data used to produce this grid was acquired in 2008 by the WA Government, and consisted of 166514 line-kilometres of data at 400m line spacing and 60m terrain clearance.

Tags: Australia, EARTH SCIENCES, Earth sciences, GADDS2.0, NASVD, NCI, Published_External, Th, WA, airborne digital data, gamma-ray, geophysical survey, geophysics, grid, rad, radiometrics, raster, spectrometry, survey 1149, thorium
Organization: Geoscience Australia Data
Gulgong 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-NSW, Published_External, Topographic Map, Topology, geology, mapping, topography
Organization: Geoscience Australia Data
Cobar magnetic and radiometric survey, NSW, 2021 (P5009), Extension 6, elevation line data

The Digital Elevation Model represents ground surface topography between points of known elevation. The elevation data was calculated using the altimeters and Global Positioning System (GPS) sensor used for the benefit of airborne magnetic and radiometric data on the same survey. The elevation is the height relative to the Australian Height Datum GDA94 (AUSGEOID09). The processed elevation 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 Cobar Magnetic and Radiometric Survey, 2021 survey were acquired in 2021 by the NSW Government, and consisted of  line-kilometres of data at 200m line spacing and 60m terrain clearance.

Tags: Australia, DEM, EARTH SCIENCES, Earth sciences, Elevation, GADDS2.0, NSW, Published_External, airborne digital data, geophysical survey, geophysics, line, survey 5009, terrain, vector
Organization: Geoscience Australia Data
Calcareous nannofossils from the Toolebuc Formation, Eromanga Basin, Australia

Calcareous nannofossils in the Toolebuc Formation reference section and in the lowermost Allaru Mudstone in BMR Boulia 3 suggest a middle to late Albian age. The evidence includes the presence of the key species Prediscosphaera columnata in assemblages overwhelmingly dominated by Tranolithus orionatus, the cool-water guide species Seribiscutum primitivum, and Watznaueria barnesae. Similar evidence is found in a core sample from BMR Tambo 38. Biostratigraphic subdivisions based on coeval foraminifera, dinoflagellates, spores and pollen are discussed. The nannofossil evidence points to deposition at high palaeolatitudes and/ or in a near-surface cool-water regime in an isolated basin with intermittent connection to the open sea. Indications of environmental stresses are thought to be linked mainly with changes in the salinity of the near-surface waters. The nannofossil record depended not only on the initial presence of the nannoflora in the surface waters, but also on the effect on preservation of fluctuating (reducing and oxidising) conditions at the water/ sediment interface, characteristic of epicontinental seas in high latitudes. A new calcareous nannofossil species, Tegumentum toolebucum, is described.

Tags: Earth Sciences, GA Publication, Journal, Published_External
Organization: Geoscience Australia Data
South Australian Seismic Monitoring Epicentre Location files, Phase worksheets Station Performance and Calibrations.

Detailed Earthquake Location files 2013-2016. Station Journals (Calibrations, logs and site visits) 1991-1993. "Scan Sheets" 1993-2016. Phase Worksheets, 1963-2016.

Tags: Calibrations, Earthquakes, Epicenter Locations, Event Data, Phase Data, Published_External, Seismic Data, Seismology, South Australia
Organization: Geoscience Australia Data
GSQ Ayr St Lawrence Qld magnetic vd1 grid geodetic

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 GSQ Ayr St Lawrence Qld magnetic vd1 grid geodetic is a first vertical derivative of the Total Magnetic Intensity grid for the Ayr-St Lawrence, QLD, AIRDATA, 1996.
This grid has a cell size of 0.00096 degrees (approximately 103m). The grid has units of nanoTesla per km (or nT/km). The data used to produce the TMI grid was acquired in 1995 by the QLD Government, and consisted of 108435 line-kilometres of data at 400m line spacing and 80m terrain clearance. A Fast Fourier Transform (FFT) process was applied to the original grid to calculate the first vertical derivative grid.

Tags: 1vd, Australia, EARTH SCIENCES, Earth sciences, GADDS2.0, NCI, Published_External, QLD, airborne digital data, first vertical derivative, geophysical survey, geophysics, grid, mag, magnetics, magnetism, palaeomagnetism, raster, survey 796
Organization: Geoscience Australia Data
GSWA Paterson Central doserate 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 GSWA Paterson Central doserate grid geodetic has a cell size of 0.00083 degrees (approximately 89m) and shows the terrestrial dose rate of the Paterson Central, WA, 2005. The data used to produce this grid was acquired in 2005 by the WA Government, and consisted of 94391 line-kilometres of data at 400m line spacing and 60m terrain clearance.

Tags: Australia, EARTH SCIENCES, Earth sciences, GADDS2.0, K, NASVD, NCI, Published_External, Th, U, WA, airborne digital data, dose, dose rate, gamma-ray, geophysical survey, geophysics, grid, potassium, rad, radiometrics, raster, rate, spectrometry, survey 1092, thorium, uranium
Organization: Geoscience Australia Data
SA Exploration Initiative - Area C3, SA, 1993 (P702), 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 SA Exploration Initiative - Area C3, SA, 1993 (P702), radiometric line data, AWAGS levelled were acquired in 1993 by the SA Government, and consisted of 44091 line-kilometres of data at 400m 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 702, thorium, uranium, vector
Organization: Geoscience Australia Data
Tanami NS 4NW - ground elevation geoid grid (radar)

Digital Elevation data record the terrain height variations from the processed point- or line-located data recorded during a geophysical survey. This Tanami NS 4NW - ground elevation geoid grid (radar) is elevation data for the NTGS Tanami NS 4NW Region Detailed Airborne Magnetic Radiometric and Digital Elevation Survey, NT, 2018. This survey was acquired under the project No. 1312 for the geological survey of NT. The grid has a cell size of 0.00018 degrees (approximately 20m).  This grid contains the ground elevation relative to the geoid for the NTGS Tanami NS 4NW Region Detailed Airborne Magnetic Radiometric and Digital Elevation Survey, NT, 2018. 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 1312, terrain
Organization: Geoscience Australia Data
Isa-Georgetown Block C,QLD, 2000, Prospectivity Plus Initiative (P828), 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 Isa-Georgetown Block C,QLD, 2000, Prospectivity Plus Initiative (P828), radiometric line data, AWAGS levelled were acquired in 2000 by the QLD Government, and consisted of 45601 line-kilometres of data at a line spacing between 200m and 400m, 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, QLD, airborne digital data, gamma-ray, geophysical survey, geophysics, line, potassium, radiometrics, spectrometry, survey 828, thorium, uranium, vector
Organization: Geoscience Australia Data
AUSGeoid98 v.1.0 data files: Perth (sh50-14)

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
Collie Area Gravity, 1982-1991 (P198259), 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 Collie Area Gravity, 1982-1991 (P198259) contains a total of 198 point data values acquired at a spacing between 50 and 200 metres. The data is located in WA and were acquired in 1982, under project No. 198259 for Geological Survey of Western Australia (GSWA).

Tags: Australia, EARTH SCIENCES, Earth sciences, GADDS2.0, NCI, Published_External, WA, geophysical survey, geophysics, gravity, ground digital data, point, point located data, survey 198259
Organization: Geoscience Australia Data
MkII Airborne Laser Fluorosensor Survey Reprocessing and Interpretation Report: Arafura Sea, Australia

The Arafura Sea airborne laser fluorosensor (ALF) MkII survey was flown in 1989 by BP. The survey was designed to detect natural oil seepage over a region of the Arafura Sea, Northern Australia, in an effort to refine the petroleum prospectivity assessment.
An area of about 400km by ~150km was surveyed at 5km line spacing. A total of 534,022 fluorosensor spectra were recorded.
This report is a re-interpretation of the BP data by Signalworks Pty Ltd using the ALF Explorer? software. A total of 1894 fluors were picked out of the 534,022 recorded spectra in the final interpretation. This is an average fluor density of 3.55 fluors per thousand spectra.
The fluorescence response over most of the survey area consisted mainly of relatively low confidence fluors (compared to the more reliable MkIII survey data).
While fluor density variations can be seen on the fluor map the geological implications are not clear. Because of its susceptibility to noise, the MkII ALF system produces less confident fluor maps than the MkIII system. Some mapped fluor density variations may be influenced by sea state or water property variations.

Tags: AU-NT, Earth Sciences, GA Publication, Published_External, Record, petroleum exploration, remote sensing
Organization: Geoscience Australia Data
Thornton Peak 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-QLD, Published_External, Topographic Map, Topology, topography
Organization: Geoscience Australia Data
Cobar Basin Seismic Survey 1989: Operational Report

A consortium consisting of the Bureau of Mineral Resources, Geology &amp;Geophysics (BMR) (now called the Australian Geological Survey Organisation (AGS0)),Department of Primary Industries &amp; Energy, Australian Government; the Department ofMineral Resources (DMR) (formerly the Department of Minerals and Energy), NSW StateGovernment; CRA Exploration Pty. Ltd.; Geopeko Pty. Ltd.; Pasminco Pty. Ltd.;conducted the Cobar Basin Seismic Survey during October to December 1989.
The main objectives of the Cobar Basin seismic survey were to acquire deep reflection seismic data along several seismic lines across the Cobar Basin and thebounding west and east margins, and acquire high resolution seismic data across zones of known mineralisation in the Cobar Basin and bounding margins. The BMR Sercel SN368seismic data acquisition system was used to record the deep reflection seismic data, and the DMR Sercel 338 seismic data acquisition system was used to record the high resolution seismic data. The acquisition of the seismic data would be used to test newtectonic models recently developed for the evolution of the region, and for genesis and control of mineralisation, especially in rock units of the Cobar Basin around Cobar. On aregional scale the acquisition of seismic data would be used to test models of basin formation in the Cobar region which perhaps could be applied elsewhere in the LachlanFold Belt.
The seismic reflection survey by the BMR, recorded 184 km of 8-fold CMP deepreflection seismic data to 20 seconds two-way travel time, along three seismic lines. The lines were positioned to investigate major structures defined by surface geology andpostulated in the recently proposed tectonic models. To provide seismic reflection data of the near surface geological rock units, 2.85 km of high resolution seismic data wererecorded along Line 2 by DMR, across a geological setting associated with mineralisation structures.

Tags: AU-NSW, Earth Sciences, GA Publication, Published_External, Record, seismics
Organization: Geoscience Australia Data
Engineering Ground-Motion Database for Western and Central Australia

A database of recordings from moderate-to-large magnitude earthquakes is compiled for earthquakes in western and central Australia. Data are mainly recorded by Australian National Seismograph Network (ANSN), complemented with data from temporary deployments, and covering the period of 1990 to 2019.  The dataset currently contains 1497 earthquake recordings from 164 earthquakes with magnitudes from MW 2.5 to 6.1, and hypocentral distances up to 1500 km. The time-series data are consistently processed to correct for the instrument response and to reduce the effect of background noise. A range of ground-motion parameters in the time and frequency domains are calculated and stored in the database. Numerous near-source recordings exceed peak accelerations of 0.10 g and range up to 0.66 g, while the maximum peak velocity of the dataset exceeds 27 cm/s. In addition to its utility for engineering design, the dataset compiled herein will improve characterisation of ground-motion attenuation in the region and will provide an excellent supplement to ground-motion datasets collected in analogue seismotectonic regions worldwide.
This paper was presented at the Australian Earthquake Engineering Society 2021 Virtual Conference, Nov 25 – 26.

Tags: EARTH SCIENCES, Earthquake Engineering, Earthquake Hazard, Ground-motion attenuation, Ground-motion database, Natural Hazards, Published_External, engineering parameters, waveform processing
Organization: Geoscience Australia Data