AndreaBozzo/ceres-open-data-index huggingface dataset:
Tasmanian Tiers Airborne Magnetic, Radiometric and Digital Elevation Survey, TAS, 2021, (P5003), Block 5, magnetic line data

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 Tasmanian Tiers Magnetic and Radiometric Survey, 2021 survey were acquired in 2021 by the TAS Government, and consisted of 32951 line-kilometres of data at 200m line spacing and 80m terrain clearance.

Tags: Australia, EARTH SCIENCES, Earth sciences, GADDS2.0, Published_External, TAS, airborne digital data, geophysical survey, geophysics, line, magnetic, magnetics, magnetism and palaeomagnetism, survey 5003, vector
Organization: Geoscience Australia Data
Age and nature of calcrete accumulations in fluvial sediments: implications for regional groundwater dynamics and landscape evolution

In this study, petrographic and geomorphic analysis of unconsolidated river bank sediments was carried out to provide new insights into groundwater dynamics and lateral bank processes in the Lower Darling Valley. Quaternary geomorphology was mapped in 3D using LIDAR, AEM and temporal Landsat, validated by drilling and field observations. Riverbank calcrete distribution was mapped using boat-mounted photography; petrographic analysis used standard optical microscopy; calcrete ages were determined by radiocarbon dating. Three-dimensional mapping of the Quaternary fluvial systems has demonstrated that calcrete accumulations occur where the river incises relatively coarser-grained sediments in abandoned meander point bars, aeolian dunes or buried paleochannels. Petrographic study suggests that calcrete forms during groundwater discharge localised at river bank sites. Solutional features in calcrete and overprinting relationships with oxides and oxyhydroxides indicate that these discharge sites may also act as recharge sites for the alluvial aquifer. This supposition is supported by bore hydrograph data (Lawrie et al., 2012). The age of calcrete accumulations cluster in periods of river migration identified by OSL dating of quartz grains. This study of the distribution of calcrete in the landscape demonstrates that groundwater-surface water interactions are discontinuous. This has implications for groundwater processes. Calcrete ages cluster in phases of river migration due to the greater likelihood of relatively coarser-grained sediments being exposed on the riverbank during periods of channel migration. Due to the resistance of calcrete to erosion, calcrete formation may play a significant role in controlling the morphology of the Darling River. The relationship between river morphology and calcrete accumulation in the river bank may assist in mapping and predicting sites of lateral bank recharge and groundwater discharge.
Presented at the Australiasian Groundwater Conference 2017 (AGC2017)

Tags: EARTH SCIENCES, Published_External, Quaternary fluvial systems, groundwater, petrographic and geomorphic analysis
Organization: Geoscience Australia Data
Continental slope and rise geomorphology seaward of the Totten Glacier, East Antarctica (112°E-122°E)

The continental slope seaward of the Totten Glacier  and Sabrina Coast displays a suite of submarine canyons separated by ridges. The ridges show a range of morphological features that indicate they form by accretion of pelagic and hemipelagic sediment which can be remobilised by mass movement. The study area can be divided into two areas with distinct geomorphological features. Canyons in the eastern part of the study area have concave thalwegs and are linked to the shelf edge and upper slope and show signs of erosion and deposition along their beds suggesting cycles of activity controlled by climate cycles. The major canyon in the western part of the area has a convex thalweg. It is likely fed predominantly by mass movement from the flanks of the adjacent ridges with less input sediment from the shelf edge. The ridges between canyons in the Eastern part of the study area are asymmetric with crests close to the west bank of adjacent canyons and are mostly formed by westward advection of fine sediment lofted from turbidity currents and deposition of pelagic sediment. The ridges in the western part of the study area are more likely fully contourites, formed by accretion of suspended sediment with their associated canyons fed by flows derived predominantly from slumping on the adjacent ridge flanks. Canyons and ridges in the eastern part of the study area lie to the east of the Totten Glacier and are seaward of small ice drainage basins feeding the Moscow University Ice Shelf. Ridges and canyons in the western part of area formed from sediment transported along the margin and from detritus originating from the Totten Glacier.  Higher sediment supply produced larger, shallower ridges that interact with ocean currents and coincide with a long-lived depocenter. The overall geomorphology of the Sabrina Coast slope is part of a continuum of mixed contourite-turbidite systems identified on the Antarctic margin. These ridges are thus prime locations to sample for sedimentary records of the Totten Glacier’s interaction with the adjacent ocean.
Citation: E. O'Brien, A.L. Post, S. Edwards, T. Martin, A. Caburlotto, F. Donda, G. Leitchenkov, R. Romeo, M. Duffy, D. Evangelinos, L. Holder, A. Leventer, A. López-Quirós, B.N. Opdyke, L.K. Armand, Continental slope and rise geomorphology seaward of the Totten Glacier, East Antarctica (112°E-122°E), Marine Geology, Volume 427, 2020, 106221, ISSN 0025-3227,
https://doi.org/10.1016/j.margeo.2020.1062

Tags: Antarctica, Continental slope and rise, EARTH SCIENCES, ENVIRONMENTAL SCIENCES, Published_External, Ridges, Submarine cnayons, Totten Glacier
Organization: Geoscience Australia Data
Mawson Geophysical Observatory annual report, 1994

Mawson is an Australian National Antarctic Research Expedition base on the Antarctic mainland managed by the Australian Antarctic Division. Geomagnetic and seismological recording and processing equipment was maintained and calibrated by an observer provided by the Australian Geological Survey Organisation (AGSO) during 1994.
Earthquake phase data was reported weekly to AGSO and to the National Earthquake Information Service (Boulder, Colorado) via email. Magnetic results were reported monthly to AGSO, and to the French Department de Geomanetisme et Paleomagnetism for use in the Oersted magnetic satellite project.
Magnetic results indicate the secular variation of the field at Mawson was relatively unchanged over the year, with a three nanoteslas decrease in total intensity and a 5.5 minute increase in westerly  declination. Magnetic data recorded at the Casey and Davis Antarctic bases was processed by the Mawson observer and indicated similar relative stability.

Tags: AQ, Earth Sciences, GA Publication, Published_External, Record, geomagnetism, geophysics
Organization: Geoscience Australia Data
Mount Billroth 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
Holroyd Special 1:250 000 topographic map

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

Tags: 250K scale, AU-QLD, Published_External, Topographic Map, Topology, topography
Organization: Geoscience Australia Data
Archaean and Proterozoic geological relationships in the Vestfold Hills-Prydz Bay area, Antarctica

The Archaean cratonic block of the Vestfold Hills, Princess Elizabeth Land is one of only three well-documented examples in East Antarctica. It is characterised by tectonically interlayered tonalitic to granitiC orthogneisses (Mossel gneiss) and garnetiferous paragneisses (Chelnok supracrustal assemblage) as well as sub- ordinate units of predominantly mafic granulite (Tryne meta-volcanics). This sequence is cut by a second suite of orthogneisses (Crooked Lake gneiSS), ranging in composition from gabbro-diorite to tonalite and granite, which was emplaced synchronously with the last major phase of deformation. Cutting the gneisses are several suites of Proterozoic tholeiitic dykes, including a high-Mg suite, which range in age from about 2350 Ma to 1300 Ma. Most dykes are unmetamorphosed, but, in the southwestern part of the VestfoldHills, high-pressure garnet-bearing assemblages developed during a late Proterozoic (about 1100 Ma) thermal event. Granulite facies gneisses that crop out southwest of the Vestfold Block, along the coast of Prydz Bay, show the regional effect of this younger metamorphism and form part of an extensive late Proterozoic high-grade terrain, which makes up much of the East Antarctic Shield.  Gneisses in the Rauer Group of Islands, within 30 km of the Vestfold Hills, are lithologically similar (predominantly orthogneisses) to those of the Vestfold Block, and contain metamorphosed relics of Vestfold dykes; however, they include only a minor component derived by remetamorphism of Archaean continental crustal rocks.  In contrast, gneisses further to the southwest were mainly derived from aluminous sedimentary protoliths, and are quite different in composition to those of the Vestfold Block and Rauer Group. They do not appear to have been intruded by mafic dykes (mafic granulite is very rare) and apparently represent a Proterozoic cover sequence of similar age to metasedimentary sequences in MacRobertson Land. Intrusion of locally fayalite- bearing granitic rocks took place about 500 Ma ago.

Tags: AAT, Earth Sciences, GA Publication, Journal, Published_External
Organization: Geoscience Australia Data
Helen Springs - Helen, NT, 1993 (P611), 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 Helen Springs/Beetaloo, NT, 1993 survey were acquired in 1993 by the NT Government, and consisted of 117753 line-kilometres of data at a line spacing between 300m and 300m, and 100m 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, NT, Published_External, airborne digital data, geophysical survey, geophysics, line, magnetic, magnetics, magnetism and palaeomagnetism, survey 611, vector
Organization: Geoscience Australia Data
Mapdat: a program for plotting spatial data from a relational database onto maps

MAPDAT is a program for plotting spatial data held in the ORACLE relational database onto any map within the Australian region at any scale. MAPDAT also includes a system for defining geological structures, thus any geological structure can be stored in the database and plotted.
The program enables the plotting of sample locations along with infomration specific to each location. The information can be displayed beside each point or in a list to the side of the map.  The symbols can be sized proportionally to the value of a column in a table or a SQL expression.  Town locations, survey paths, gridlines, survey areas, coastlines and other geographical lines can be plotted.  
The program does not compete with geographical information systems but fills a niche at a much lower level of complexity.  As a result of its simplicity a minimum in setting up of data is required and using the program is very straight forward with the user always aware of the database operations being performed.

Tags: Earth Sciences, GA Publication, Published_External, Record, geoscience databases
Organization: Geoscience Australia Data
Sixth BMR Symposium

The BMR Symposia are annual events stressing work relevant to industry. The Sixth Symposium was held in Canberra between 3 and 5 May 1977, and was officially opened by the Minister for Science, Senator the Hon. J.J. Webster. On 3 and 4 May, sessions were held at the Academy of Science Building. Talks presented, abstracts of which are given below, included results of completed projects, of work in progress, and some more general topics. A panel discussion, entitled What maps are needed now? was held on earth-science maps in Australia. The contributions of the members of the panel, and an edited version of the discussion, will be published in the December Issue of this Journal. An innovation this year was a one-day workshop, held at the Administration Building of CSIRO on 5 May 1977; the subject was the Pine Creek Geosyncline. Specific topics were discussed under broad headings of regional studies, uranium mineralization, and mapping and exploration techniques. 140 were present at the workshop, many of whom took part in discussion.

Tags: Earth Sciences, GA Publication, Journal, Published_External
Organization: Geoscience Australia Data
L062 & L064 Thargomindah-Noccundra seismic reflection and refraction survey, Eromanga Basin, QLD, 1962 1963

Several seismic surveys were made by the Bureau of Mineral Resources, Delhi Australian Petroleum Ltd, -Phillips Petroleum Company, and L. H. Smart Oil Exploration Company Ltd during the period from 1959 to 1963 between Eula and the Queensland/South Australia border area of the Eromanga Basin. This report covers the seismic work done by the Bureau of Mineral Resources in 1962 and 1963 and also incorporates
the results of the work done by the private oil exploration companies. It aims at providing information on the nature and structure of the rocks underlying the Mesozoic sediments of the Eromanga Basin. The seismic results have been interpreted with reference to the geology as known from the Delhi-Santos Orientos No. 1 and Dullingari No.1 wells near the Queensland/South Australia border and the Smart Oil Orient No. 2 well on the Grey Range.

Tags: AU-QLD, HVC_144637, Published_External, Seismic Data seismic survey, Seismology and Seismic Exploration, geophysics, seismic reflection, seismic refraction, seismic velocity
Organization: Geoscience Australia Data
Robinson Range Belele 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 88m) and shows thorium element concentration of the Robinson Range - Belele, WA, 2003 in units of parts per million (or ppm). The data used to produce this grid was acquired in 2003 by the WA Government, and consisted of 53021 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 1035, thorium
Organization: Geoscience Australia Data
L193 Southern Delamerian Seismic Survey, VIC & SA, 2009. Stack and Migrated SEG-Y Seismic Data and Images for Lines 09GA-SD1 and 09GA-SD2

Processed seismic data (SEG-Y format) and TIFF images for the 2009 Southern Delamerian Seismic Survey (L193) acquied by Geoscience Australia, in conjunction with AuScope, Victoria Department of Primary Industries, and Primary Industries and Resources, SA (PIRSA). Stack and migrated data are included for lines 09GA-SD1 and 09GA-SD2, as well as CDP coordinates.
Raw data for this survey are available on request from clientservices@ga.gov.au

Tags: AU-SA, AU-VIC, HVC_144637, Published_External, Seismic Data seismic survey, Seismology and Seismic Exploration, geophysics, mineral exploration, seismic reflection, seismic sections
Organization: Geoscience Australia Data
Y2 November 2003 CRC Reviewpdf is a presentation made to sponsors and the review panel in November 2003

Y2 November 2003 CRC Review.pdf is a presentation made to sponsors and the review panel in November 2003.

Tags: AU-WA, Earth Sciences, PMD*CRC Publication, Project Y2 - Appendix 9, Published_External, pmd*CRC
Organization: Geoscience Australia Data
Rudall 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
Relation of Bouguer anomalies to crustal structure in southwestern and central Australia

An analysis of the gravity field in two largely Precambrian metamorphic rock areas of Australia, one in the southwestern and the other in the central part, indicates that the regional Bouguer anomalies may be explained by models of the crust and upper mantle consistent with the other geophysical and geological observations. In the southwestern part, the longer wavelength component of the anomalies is consistent with a crust which has been determined by seismic measurements to be greater than normal in thickness and density in the west owing to the presence of a high-velocity basal layer that thins out eastwards. The shorter wave-length components show excellent correlation with the near-surface geology. In central Australia, where no comparable seismic measurements have been made, the Bouguer anomaly field, which is dominated by large amplitude (up to 150 mGal) and long wavelength (about 150 to 200 km) components, is interpreted in terms of thickness and structure of a two-layer crust. The derived crustal model is based on the concept of folding and faulting that involves the entire crust and upper mantIe, and is compatible with the broad aspects of surface geology and structure. The crustal upwarps in the model, with the intermediate and Mohorovicic discontinuities at depths as shallow as 15 and 27 km, are associated with the Arunta and Musgrave Blocks, where deep crustal rocks are exposed against large thrust faults. The crustal downwarps, with the discontinuities as deep as 31 and 43 km, are associated with basins containing substantial thicknesses of sediments. Depths to these discontinuities are in agreement with those estimated from the only two isolated deep seismic reflection probes in the basin areas.

Tags: Earth Sciences, GA Publication, Journal, NT, Published_External, SA, WA
Organization: Geoscience Australia Data