AndreaBozzo/ceres-open-data-index huggingface dataset:
Conductivity Model Derived from Magnetotelluric Data in the East Tennant Region, Northern Territory

The footprint of a mineral system is potentially detectable at a variety of scales, from the ore deposit to the Earth’s crust and lithosphere. In order to map these systems, Geoscience Australia has undertaken a series of integrated studies to identify key regions of mineral potential using new data from the Exploring for the Future program together with legacy datasets. 
The recently acquired long-period magnetotellurics (MT) data under the national-scale AusLAMP project mapped a lithospheric scale electrical conductivity anomaly to the east of Tennant Creek. This deep anomaly may represent a potential source region for mineral systems in the crust. 
In order to refine the geometry of this anomaly, high-resolution broadband and audio MT data were acquired at 131 stations in the East Tennant region and were released in Dec 2019 (http://dx.doi.org/10.26186/5df80d8615367). We have used these high-resolution MT data to produce a new 3D conductivity model to investigate crustal architecture and to link to mineral potential. The model revealed two prominent conductors in the resistive host, whose combined responses link to the deeper lithospheric-scale conductivity anomaly mapped in the broader AusLAMP model. 
The resistivity contrasts coincide with the major faults that have been interpreted from seismic reflection and potential field data. Most importantly, the conductive structures extend from the lower crust to near-surface, strongly suggesting that the major faults are deep penetrating structures that potentially act as pathways for transporting metalliferous fluids to the upper crust where they can form mineral deposits. Given the geological setting, these results suggest that the mineral prospectivity for iron oxide copper-gold deposits is enhanced in the vicinity of the major faults in the region.
This release package includes the 3D conductivity model produced using ModEM code in sGrid format and Geo-referenced depth slices in .tif format.

Tags: EARTH SCIENCES, EFTF, East Tennant, Exploring For The Future, HVC_144686, Published_External, geophysics, magnetotellurics
Organization: Geoscience Australia Data
Nanango 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
Maret 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-WA, Published_External, Topographic Map, Topology, topography
Organization: Geoscience Australia Data
Australia-wide 3D Density and Magnetic Susceptibility Models - Reducing the search space for Iron Oxide Copper-Gold deposits

Three-dimensional models of density and magnetic susceptibility were produced for a volume covering onshore Australia. The models were produced as part of the Australian government’s Exploring for the Future (EFTF) program and were designed to provide the mineral exploration industry with new information that would help reduce the search space for Iron Oxide Copper-Gold (IOCG) deposits.
&nbsp;
The density and magnetic susceptibility models were produced by the inversion of gravity and magnetic data, respectively, using the University of British Columbia - Geophysical Inversion Facility’s MAG3D and GRAV3D programs on the National Computational Infrastructure supercomputer. The inversions were constrained with geological information including layers for sediments, undifferentiated crust, upper mantle and depth of magnetisation (Curie depth).
&nbsp;
The work presented here is a continuation of previous studies which have shown a strong relationship between regions of coincident high density (>2.83 g/cm3) and high magnetic susceptibility (>0.0125 SI) with known IOCG deposits. Specific examples include the Tennant Creek (Northern Territory), Cloncurry (Queensland) and Gawler (South Australia) regions. 
&nbsp;
With a horizontal cell size of 800 m, the models are unlikely to image any anomalous physical properties directly associated with IOCG mineralisation itself. However, hydrothermal alteration systems containing IOCG deposits, are much larger and can extend over hundreds of square kilometres in lateral dimensions. It is suggested that these regions of high density and high-magnetic susceptibility are related to ultramafic rocks and the magnetite-forming hydrothermal alteration stages of potentially fertile IOCG systems.
&nbsp;
As the largest and most detailed models of their type in the world, these models will play a critical part in de-risking districts across the continent at the concept to greenfield stages of exploration for IOCG deposits.&nbsp;They form part of Geoscience Australia’s pre‑competitive national datasets that make Australia a preferred investment destination for mineral exploration and resource development.

Presented at the 2024 Australian Society of Exploration Geophysicists (ASEG) Discover Symposium

Tags: Applied geophysics, EFTF – Exploring for the Future, Geophysical Acquisition and Processing (GAP) section, Gravity, IOCG, Inversion, Magnetics, Mineral Potential, Published_External
Organization: Geoscience Australia Data
AUSGeoid98 v.1.0 data files:  (sl51-03)

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
Surface rupture and distributed deformation revealed by optical satellite imagery: The intraplate 2016 Mw 6.0 Petermann Ranges earthquake, Australia

High‐resolution optical satellite imagery is used to quantify vertical surface deformation associated with the intraplate 20 May 2016 Mw 6.0 Petermann Ranges earthquake, Northern Territory, Australia. The 21 ± 1‐km‐long NW trending rupture resulted from reverse motion on a northeast dipping fault. Vertical surface offsets of up to 0.7 ± 0.1m distributed across a 0.5‐to‐1‐km‐wide deformation zone are measured using the Iterative Closest Point algorithm to compare preearthquake and postearthquake digital elevation models derived from WorldView imagery. The results are validated by comparison with field‐based observations and interferometric synthetic aperture radar. The pattern of surface uplift is consistent with distributed shear above the propagating tip of a reverse fault, leading to both an emergent fault and folding proximal to the rupture. This study demonstrates the potential for quantifying modest (&lt;1 m) vertical deformation on a reverse fault using optical satellite imagery.

Tags: EARTH SCIENCES, InSAR, Intraplate earthquake, Published_External, earthquake hazard
Organization: Geoscience Australia Data
Albany-Fraser (Esperance, Malcolm), WA, 1981 (P463), 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 Albany-Fraser (Esperance, Malcolm), WA, 1981 survey were acquired in 1981 by the WA Government, and consisted of 20797 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, Published_External, WA, airborne digital data, geophysical survey, geophysics, line, magnetic, magnetics, magnetism and palaeomagnetism, survey 463, vector
Organization: Geoscience Australia Data
Stratigraphic significance of a discovery of Lower Proterozoic tuff in the Pine Creek Geosyncline

Recent investigations in the Pine Creek Geosyncline in the northern part of the Northern Territory have revealed the presence of tuff within the Lower Proterozoic metasediments (Needham and others, 1978). The tuff is confined to one horizon, and crops out in the central and eastern parts of the Geosyncline, enabling stratigraphic correlations to be made between formations previously believed to have been deposited in two separate basins. Previous workers believed different kinds of sediment were laid down in each basin, and that only limited correlation was possible between the basins (Walpole and others, 1968). The regional stratigraphic concept of earlier workers was dominated by lateral and lesser vertical facies inter-fingering of units (formations), which were placed into groups, each of which contained a number of laterally disposed, lithogenetically related formations (Walpole and others, 1968). Tuff, by its depositional nature, is a time-stratigraphic indicator, so its regional conformity with metasedimentary units in the Geosyncline suggests that they are also time-stratigraphic in character, and not facies equivalents or time-transgressive as proposed previously.

Tags: Earth Sciences, GA Publication, Journal, NT, Published_External
Organization: Geoscience Australia Data
Coonarie 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-SA, Published_External, Topographic Map, Topology, topography
Organization: Geoscience Australia Data
Banjo Creek 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
Pittsworth 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
Dalea 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-WA, Published_External, Topographic Map, Topology
Organization: Geoscience Australia Data
A strontium isoscape of southwestern Australia

Strontium isotopes (87Sr/86Sr) are useful in the earth sciences (e.g. recognising geological provinces, studying geological processes) as well in archaeological (e.g. informing on past human migrations), palaeontological/ecological (e.g. investigating extinct and extant taxa’s dietary range and migrations) and forensic (e.g. validating the origin of drinks and foodstuffs) sciences. Recently, Geoscience Australia and the University of Wollongong have teamed up to determine 87Sr/86Sr ratios in fluvial sediments selected mostly from the low-density National Geochemical Survey of Australia (NGSA; www.ga.gov.au/ngsa). The present study targeted the Yilgarn geological region in southwestern Australia. The samples were mostly taken from a depth of ~60-80 cm (Bottom Outlet Sediments, BOS) in floodplain deposits at or near the outlet of large catchments (drainage basins). A small number of surface (0-10 cm) samples (Top Outlet Sediments, TOS) were also included in the study. For all, a coarse grain-size fraction (<2 mm) was air-dried, sieved, milled then digested (hydrofluoric acid + nitric acid followed by aqua regia) to release total strontium. Overall, 107 NGSA BOS < 2 mm and 13 NGSA TOS < 2 mm were analysed for Sr isotopes. Given that there are ~10 % field duplicates in the NGSA, all those samples originate from within 97 NGSA catchments, which together cover 533 000 km2 of southwestern Australia. Preliminary results for the BOS samples demonstrate a wide range of strontium isotopic values (0.7152 < 87Sr/86Sr 100 km) patterns that appear to be consistent, in many places, with surface geology, regolith/soil type and/or nearby outcropping bedrock. For instance, catchments in the western and central Yilgarn dominated by felsic intrusive basement geology have radiogenic 87Sr/86Sr signatures in the floodplain sediments consistent with published whole-rock data. Similarly, unradiogenic signatures in sediments in the eastern Yilgarn are in agreement with published whole-rock data. Our results to-date indicate that incorporating soil/regolith strontium isotopes in regional, exploratory geoscience investigations can help identify basement rock types under (shallow) cover, constrain surface processes (e.g. weathering, dispersion), and, potentially, recognise components of mineral systems. Furthermore, the resulting strontium isoscape and model derived therefrom can also be utilised in archaeological, paleontological and ecological studies that aim to investigate past and modern animal (including humans) dietary habits and migrations.&nbsp; The new spatial dataset is publicly available through the Geoscience Australia portal https://portal.ga.gov.au/.

Tags: Australia’s Resources Framework, EFTF, EFTF – Exploring for the Future, Exploration geochemistry, Isotope geochemistry, Isotopic Atlas of Australia, Mineral exploration, National Database of Archived Samples, Published_External, Soil chemistry and soil carbon sequestration (excl. carbon sequestration science), Sr isotopes, regolith
Organization: Geoscience Australia Data
Phase 1 data release for infill areas within the Woolner Granite and Rum Jungle AEM surveys, 2010

During 2008 and 2009, and under the Australian Government's Onshore Energy Security Initiative, Geoscience Australia acquired airborne electromagnetic (AEM) data over the Pine Creek Orogen of the Northern Territory. The survey area was split into three areas for acquisition. VTEM data was acquired in the Kombolgie area east of Kakadu National Park between August and November 2008. TEMPEST data was acquired west of Kakadu National Park with the area split in two to facilitate the use of two aircraft: the Woolner Granite area in the north  was acquired between October and December 2008; and the Rum Jungle area (this data set) adjoining to the south, which was acquired between October 2008 and May 2009. The main purpose of the surveys was to provide additional geophysical/geological context for unconformity style uranium mineral systems and thereby promote related exploration. The survey data will also provide information on depth to Proterozoic/Archean basement, which is of general interest to explorers, and will be used as an input into ground water studues in the region.

Tags: AEM, AU-NT, Airborne Digital Data, Airborne Electromagnetics, Geophysics, Point Located /Grid, Published_External, geophysics
Organization: Geoscience Australia Data
The storage and retrieval system for hydrogeological data from the Great Artesian Basin

This Record describes the scope of the Great Artesian Basin (GAB) Automatic Data Processing System and outlines Stage 1(Data Transcription), and describes Stage 2, the checking of coded data.
The subject of this record is the permanent storage, updating, and retrieval for processing of the data passed through Stages 1 and 2. The system described was developed for application to drill stem test (DST; Formation Test) data by G.E. Seidel (BMR) and then extended to suit the general GAB data by G. Krebs (BRGM).

Tags: Earth Sciences, GA Publication, Published_External, Record, hydrogeology, information management
Organization: Geoscience Australia Data
Vulcan Tertiary Tie (VTT) Basin Study: Vulcan Sub-basin, Timor Sea, Northwestern Australia

As part of its ongoing investigations into the basin evolution and petroleum systems of the Australian continental margin, the Australian Geological Survey Organisation (AGSO) carried out two high resolution seismic acquisition programs (the VTT and VTX surveys) in the Vulcan Sub-basin (and surrounds), Timor Sea. In this report, the 5000 km of VTT and VTX seismic data have been interpreted and integrated with well and other data to provide a regional structural and sequence stratigraphic framework for this highly prospective, but geologically complex, region. It is hoped that this study will both provide AGSO with a sound interpretative framework for its ongoing regional studies, as well as providing an important data base for companies exploring in this area.

Tags: Earth Sciences, GA Publication, Published_External, Record, seismics
Organization: Geoscience Australia Data
Late Carboniferous and Early Permian palynostratigraphy of the Joe Joe Group, southern Galilee Basin, Queensland, and implications for Gondwanan stratigraphy

Five new Carboniferous to Permian palynological Oppel-zones have been identified through detailed analyses of core samples taken from the Joe Joe Group sediments of the Galilee Basin.  In ascending stratigraphic order, and in relation to their host formations , the Oppel-zones are: the Verrucosisporites basiliscutis Oppel-zone (A), spanning the Lake Galilee Sandstone and the basal Jericho Formation; the Brevitriletes leptoacaina Oppel-zone (B), in the mid-Jericho Formation ; the Diatomozonotriletes birkheadensis Oppel-zone (C), in the upper Jericho Formation; the Asperispora reticulatispinosus Oppel-zone (D), encompassing much of the Jochmus Formation and the uppermost part of Jericho Formation (including the Oakleigh Siltstone Member); and the Microbaculispora tentula Oppel-zone (E), in the upper part of the Jochmus Formation.  The three oldest Oppel-zones are grouped to form the Carboniferous (Namurian A-upper Westphalian D) Spelaeotriletes queenslandensis Superzone, which correlates with the Spelaeotriletes ybertii Assemblage of earlier workers. The overlying Asperispora reticulatispinosus Oppel-zone (D) (upper Westphalian D-Upper Autunian, or early Asselian) mostly correlates with the Potonieisporites Assemblage. The uppermost Microbaculispora tentula Oppel-zone (E), late Autunian (late Carboniferous) to early Tastubian (Early Permian), correlates with the Upper Stage 2.  Application of the Oppel-zones has clarified relationships between outcrop sections of the earlier defined Joe Joe Formation of the Galilee Basin and lithological units subsequently identified in the sub-surface.  Stratigraphic interpretation of the Oppel-zones with their lithostratigraphic equivalents suggests that late Palaeozoic glaciation began in the Westphalian D and continued until the late Asselian/earliest Tastubian, when climatic warming resulted in sea level rise associated with continental glacial melting. The palynological record shows the impact of this glacial episode, which caused significant global compositional changes in palynofloras in the Late Carboniferous/Early Permian. These changes may allow correlations between Gondwana and Laurasia.  Eleven new species of miospore are described.

Tags: Earth Sciences, GA Publication, Journal, Published_External, QLD
Organization: Geoscience Australia Data
AUSGeoid98 v.1.0 data files:  (sj50-04)

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