AndreaBozzo/ceres-open-data-index huggingface dataset:
The geology of the Machattie 4-mile sheet area, Queensland

The Machattie 4-mile Sheet area in western Queensland was mapped in 1960. Surface mapping and examination of water bore logs established a sequence of at least 2750 feet of Cretaceous rocks, which are, in places, unconformably overlain by up to 55 feet of Tertiary sediments. Possible basement rocks were struck in Cluny No. 1 and Coorabulka No. 10 bores. The Cretaceous rocks form the main aquifer and impermeable cap of the western portion of the Great Artesian Basin. The Lower Cretaceous shales of the Wilgunya Formation are possible source rocks for petroleum. Source rocks also occur in the Lower Palaeozoic succession to the north, in the Boulia 4-mile Sheet area. The sandstones of the Lower Cretaceous Longsight Sandstone are possible reservoir rocks in the Machattie area. Neither oil nor gas has been recorded from any of the bores (11 artesian, 2 sub-artesian). Showings were reported from the Bedourie Bore, 5 miles west of the area, and from Delhi-Frome-Santos Betoota No. 1 Well , 50 miles south of the Machattie area. A major north-east trending structure is present in the north-east corner of the area. It is possibly a continuation of the structure against which the Burke River Structure terminates in the Springvale 4-mile Sheet area, north of the Machattie area. No economic mineral deposits are present in the area

Tags: AU-QLD, Earth Sciences, GA Publication, Published_External, Record, geology
Organization: Geoscience Australia Data
Light Hydrocarbon Geochemistry of the WA-28-P Area, Dampier Sub-basin, Western Australia : Rig Seismic Survey 97 : Project 121.19

As part of its geochemical research program, the Marine Geoscience and PetroleumGeology Group (Australian Bureau Of Mineral Resources) is evaluating the usefulness ofthe Direct Hydrocarbon Detection (DHD) method. The data for this DHD program wereacquired during a co-operative high resolution seismic reflection program with WoodsidePetroleum Pty Ltd in the Dampier Sub-Basin. The data acquisition phase took placebetween October 22-28, 1990, with a total of 531 km (25 lines) of DHD data beingcollected between the Angel gas field in the north-east and the Madeleine 1 well in thesouth-west of Woodside Petroleum exploration permit WA-28-P in the Dampier Sub-Basin, on the North-West shelf, Australia.
No significant hydrocarbon anomalies were detected on any of the lines, in spite of the factthat many lines traversed known oil and gas accumulations, such as the Wanaea, Cossackand Angel accumulations. The lack of anomalies indicates that the major reservoirhorizons in this part of the Dampier Sub-Basin are well-sealed, and that little opportunityfor the vertical migration of hydrocarbons exists.
While no significant anomalies were detected, very minor increases in total hydrocarbonwere, however, observed over some of the wells/fields. The largest increase in THC wasobserved over the Montague 1 well location, where the value increased from abackground level of 16ppm to a high of 22.8ppm. There was no increase in any of thelight hydrocarbon gases.

Tags: AU-WA, Earth Sciences, GA Publication, Published_External, Record, geochemistry, hydrocarbons
Organization: Geoscience Australia Data
National Gravity Compilation 2019 Ausdrape elevation geoid image (hillshade HSI)

Digital Elevation data record the terrain height variations from the processed SRTM surface elevation 3 second grid data with a drape surface overlain. This National Gravity Compilation 2019 Ausdrape elevation geoid image (hillshade HSI) is elevation data for the 2019 Australian National Gravity Grids B series. These data are used in the project No. 202008. The grid used to produce this image has a cell size of 0.00417 degrees (approximately 435m). All data (i.e., ground, airborne and marine derived from satellite altimetry) were vertically continued to this surface during processing. The surface was generated to mimic a smooth airborne survey drape surface with a minimum surface clearance of 250 m and an isotropic maximum climb and descent rates of 25 m per km. The ground surface data were derived from SRTM data with 3 second grid cell size. The data are given in units of meters. The data are given in units of meters.

Tags: Australia, DEM, EARTH SCIENCES, Earth sciences, Elevation, GADDS2.0, NCI, None, Published_External, airborne, digital data, geoid, geophysical survey, geophysics, grid, image, raster, survey 202008, terrain
Organization: Geoscience Australia Data
Videos from Jervis Bay surveys

Several surveys to Jervis Bay, NSW were conducted between 2008 and 2009 to trial newly acquired Multibeam and video equipment, and to collect bathymetry and backscatter data, and characterise the benthic habitats and biota of Jervis Bay. During this time, two video surveys were conducted during the 17-20th June 2008 (GA survey #0312) and 25-26th August 2008 (GA survey #0309) in the south-eastern corner of Jervis Bay, NSW (off Darling Road) in water depths of 5-30 m.  Video transects were run alongshore (4 x 6 km transects) and offshore (6 x 3 km transects) to map the spatial distributions of benthic habitats and biota. Video footage was recorded to mini DV tapes, and copied to digital format.  For further information on this survey please refer to the post-survey report (GA Record 2009/10 - Geocat #68383).  In addition, a drop-camera survey was conducted during 23 - 26 November 2009 to collect still colour photographs on the seabed at 24 stations throughout Jervis Bay (bounding coordinates 35.0045Â°S, 150.6884Â°E to -35.1262Â°S, 150.7868Â°E. MISSING Tara's main video files.

Tags: AU-NSW, CERF, Earth Sciences, HVC_144640, Multimedia, Published_External, marine
Organization: Geoscience Australia Data
Tectonic geomorphology and Holocene uplift rates of the Lae Urban Area, Papua New Guinea

The city of Lae is Papua New Guinea (PNG)’s second largest, and is the home of PNG’s largest port. Here, a convergence rate of ~50 mm/yr between the South Bismarck Plate and the Australian Plate is accommodated across the Ramu-Markham Fault Zone (RMFZ). The active structures of the RMFZ are relatively closely spaced to the west of Lae. However, the fault zone bifurcates immediately west of the Lae urban area, with one strand continuing to the east, and a second strand trending southeast through Lae City and connecting to the Markham Trench within the Huon Gulf.

 

The geomorphology of the Lae region relates to the interaction between riverine (and limited marine) deposition and erosion, and range-building over low-angle thrust faults of the RMFZ. Flights of river terraces imply repeated tectonic uplift events; dating of these terraces will constrain the timing of past earthquakes and associated recurrence intervals. Terrace riser heights are typically on the order of 3 m, indicating causative earthquake events of greater than magnitude 7.



Future work will expose the most recently active fault traces in trenches to assess single event displacements, and extend the study to the RMFZ north of Nadzab Airport. These results will inform a seismic hazard and risk assessment for Lae city and surrounding region.

Presented at the 2023 Australian Earthquake Engineering Society (AEES) Conference

Tags: Hazard Response, Lae, Natural Hazards, Pacific Nations, Papua New Guinea - PNG, Published_External, Structural geology and tectonics, earthquakes, paleoseismology, seismic hazard, tectonic geomorphology
Organization: Geoscience Australia Data
5028 Block 4 (Northeast) Grid of equivalent air-absorbed dose rate with NASVD and standard reductions applied

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 total dose rate is due to natural sources of radiation and is computed by adding estimates of cosmic dose at ground level to the terrestrial dose. 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 total dose rate grid.
This 5028 Block 4 (Northeast) Grid of equivalent air-absorbed dose rate with NASVD and standard reductions applied has a cell size of  degrees (approximately 20m) and shows the total dose rate of the Narryer survey. The data used to produce this grid was acquired in 2024 by the WA Government, and consisted of 415090 line-kilometres of data at 100m line spacing and 50m terrain clearance.

Tags: Australia, EARTH SCIENCES, Earth sciences, GADDS2.0, K, NASVD, NCI, Published_External, Th, U, WA, airborne digital data, dose rate, gamma-ray, geophysical survey, geophysics, grid, potassium, rad, radiometrics, raster, rate, spectrometry, survey 5028, thorium, total dose, uranium
Organization: Geoscience Australia Data
National Gravity Compilation 2019 DGIR tilt grid

Gravity data measure 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 National Gravity Compilation 2019 DGIR tilt grid is produced from the 2019 Australian National Gravity Grids A series. These gravity data were acquired under the project No. 202008. The grid has a cell size of 0.00417 degrees (approximately 435m). The data are derived from ground observations stored in the Australian National Gravity Database (ANGD) as at September 2019, supplemented by offshore data sourced from v28.1 of the Global Gravity grid developed using data from the Scripps Institution of Oceanography, the National Oceanic and Atmospheric Administration (NOAA), and National Geospatial-Intelligence Agency (NGA) at Scripps Institution of Oceanography, University of California San Diego. Out of the approximately 1.8 million gravity observations, nearly 1.4 million gravity stations in the ANGD together with marine data were used to generate this grid. The ground gravity data used in the national grid has been acquired by the Commonwealth, State and Territory Governments, the mining and exploration industry, universities and research organisations from the 1940's to the present day. Station spacing for ground observations varies from approximately 11 km down to less than 1 km, with major parts of the continent having station spacing between 2.5 and 7 km. The DGIR was obtained by subtracting 3 quantities (i.e., the near-field isostatic correction, the far-field isostatic correction, and a first order trend correction) from Complete Bouguer Anomaly data (CBA) of the 2019 Australian National Gravity Grids A series. The grid shows a tilt of the de-trended global isostatic residual (DGIR) anomalies (A series) over Australia and its continental margins. A tilt filter was calculated by applying a fast Fourier transform (FFT) process to the DGIR grid of the 2019 Australian National Gravity Grids A series. A tilt filter is a ratio of the vertical derivative to the total horizontal derivative and is used for detection of edges of geological units.

Tags: A series, Australia, EARTH SCIENCES, Earth sciences, GADDS2.0, NCI, None, Published_External, de-trended, geophysical survey, geophysics, grav, gravity, grid, ground digital data, isostatic, marine data, national, raster, residual, satellite data, survey 202008, tilt
Organization: Geoscience Australia Data
Cyclone-induced Net Sediment Transport Pathway on the Continental Shelf of Tropical Australia Inferred from Reef Talus Deposits

Tropical cyclones affect storm-dominated sediment transport processes that characterise Holocene shelf deposits in many shelf environments. In this paper, we describe the geomorphology of reef talus deposits found in the Gulf of Carpentaria and Arafura Sea, Australia,that we attribute to tropical cyclones. The orientation of these deposits is also indicative of a consistent, along-coast transport pathway.

Tags: AU-NT, AU-QLD, Earth Sciences, External Publication, Published_External, Scientific Journal Paper, marine, marine survey
Organization: Geoscience Australia Data
Australia's Identified Mineral Resources 2009

Australia's Economic Demonstrated Resources (EDR) for the following 18 mineral commodities increased during 2008 - black coal, copper, gold, iron ore, lead, lithium, manganese ore, molybdenum, nickel, niobium, rare earth oxides, silver, tantalum, tungsten, uranium, vanadium, zinc and zircon. In the same period, EDR of nine commodities decreased - brown coal, cobalt, diamonds (gem and industrial), mineral sands (ilmenite and rutile), platinum group elements, shale oil and tin. EDR for antimony, bauxite, cadmium, magnesite, and phosphate rock remained at levels similar to those reported in 2007.

World ranking: Australia's EDR of brown coal, mineral sands (rutile and zircon), nickel, silver, uranium, zinc and lead remain the world's largest, while antimony, bauxite, black coal, copper, gold, industrial diamond, iron ore, ilmenite, lithium, manganese ore, niobium, tantalum and vanadium all rank in the top six worldwide.

Resource life: Ratios of accessible Economic Demonstrated Resources (AEDR) to current mine production provide indicative estimates of the resource life.  AEDR of most of Australia's major commodities can sustain current rates of mine production for many decades.  Resource life based on ore reserves is lower, reflecting a shorter term commercial outlook.

Over the decade 1997 to 2008 there has been a significant trend towards lower AEDR/production ratio for coal and iron ore, which was the nett result of major increases in production and reassessment of resources.

Commodities with resource life of less than 50 years are diamonds (about 10 years at current rates of production), manganese ore (20 years), gold (30 years), zinc (35 years) and lead (40 years). 

The severe world financial crisis in late 2008 highlighted the fact that a long resource life for a particular commodity is not a guarantee that such resources will continue to be exploited in Australia. In an increasingly globalised and competitive commodity market, multinational mining companies are continually in search of mineral deposits that will offer attractive returns on their investment. Such returns are influenced by the quality of the resources (grade and tonnage) as well as environmental, social and political factors, land access and even the location and scale of the competitor projects - individual mine projects in Australia will be ranked by multinational corporations against the investment returns from other deposits worldwide. 

Australia's continuing position as a premier mineral producer is dependent on continuing investment in exploration to locate high quality resources and/or to upgrade known deposits in order to make them competitive on the world market, and investment in beneficiation processes to improve metallurgical recoveries.

Australia's Identified Mineral Resources 2009 provides information on and analysis of mineral exploration expenditures in Australia for the calendar year 2008. Trends in expenditure are presented and discussed.

Tags: AU, Earth Sciences, GA Publication, Published_External, Report, geoscience, marine, mineral deposits, resource assessment
Organization: Geoscience Australia Data
Youngest Permian marine macrofossil fauna from the Bowen and Sydney Basins, eastern Australia

The marine invertebrate macrofauna from the upper part of the Blenheim Subgroup of the Bowen Basin and the Kulnura Marine Tongue of the Sydney Basin is described. The fauna is assigned to 12 genera, one of which - Pseudonucula - is newly recognised, and to 13 species, of which one is new. On the basis of these descriptions and existing published information, three zones are recognised in the Blenheim subgroup, in ascending order, the Martiniopsis magna, the Martiniopsis pelicanensis and the Martiniopsis havilensis zones. An explanation is given of the conclusions of Waterhouse and Jell (1983) about the lower part of the subgroup. From the fauna, particularly the occurrence of Martiniopsis havilensis, it is concluded that a hiatus occurs in the Blenheim Subgroup between the Black Alley Shale and the Peawaddy Formation in the southwestern part of the Bowen Basin, and that the Black Alley Shale is equivalent to the MacMillan Formation in the central part of the basin and the Exmoor Formation in the northeastern part. The upper part of the Blenheim Subgroup (zone of Martiniopsis havilensis) seems to be younger than the Mulbring Shale of the Sydney Basin, and the Kulnura Tongue is not likely to be significantly younger than the Blenheim Subgroup. The faunas described appear to be younger than Kungurian, but are not likely to be younger than the Kazanian. They are rather low in diversity relative to older Permian faunas in the two basins, and this probably reflects the rather restricted marine conditions at the end of the open sea in the two basins.

Tags: Earth Sciences, GA Publication, Journal, Published_External
Organization: Geoscience Australia Data
Diatoms Control Nutrient Cycles in a Temperate, Wave-dominated Estuary (Southeast Australia)

Diatoms are important primary producers within pelagic, benthic end epiphytic communities and their siliceous frustule leads to rapid sinking to the sediment. As a consequence, diatoms play a critical role in nutrient and carbon cycles in shallow and deep water environments. In this study, benthic nutrient and gas fluxes, water column and sediment properties were studied in a coastal lagoon of south-eastern Australia to identify control mechanisms coupling benthic and pelagic processes, in particular, how nutrients become fractionated by processes affecting benthic nutrient fluxes. During late spring, the water column of St. Georges Basin was oligotrophic, primary production was likely P limited and the phytoplankton community was dominated by cyanophytes. Molar ratios of TCO2 : Si benthic fluxes, however, were equal to the molar composition of diatoms suggesting that diatoms preferentially sink and deliver the most labile organic matter fraction to the sediment. The congruent release of Si and C implies a coupling of processes mobilizing Si and C. It is argued that extracellular polymeric substances surrounding the silicious frustule are the primary labile organic matter fraction and their rate of mineralization limits the dissolution of the silicious frustule. As decomposing biomass in sediments lead to net N2-production and very efficient burial of P, the fate of diatoms significantly contribute to the removal of bioavailable nutrients. High DIN:DIP benthic flux ratios of 290 to 900 promote P limitation particularly in shallow water bodies with long water residence times.

Tags: AEM, AU-QLD, Earth Sciences, External Publication, Published_External, Scientific Journal Paper, geochemistry, marine
Organization: Geoscience Australia Data
5028 Block 3 (Northwest) Grid of Total Magnetic Intensity (TMI) with Reduction to Pole (RTP) and a First Vertical Derivative (1VD) applied

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 5028 Block 3 (Northwest) Grid of Total Magnetic Intensity (TMI) with Reduction to Pole (RTP) and a First Vertical Derivative (1VD) applied is the first vertical derivative of the TMI RTP grid of the Narryer survey.
This grid has a cell size of  degrees (approximately 20m) , and given in units of nT per metre (nT/m).  The data used to produce the TMI grid was acquired in 2024 by the WA Government, and consisted of 415090 line-kilometres of data at 100m line spacing and 50m terrain clearance. 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. A first vertical derivative was calculated by applying a fast Fourier transform (FFT) process to the TMI RTP grid of the Narryer survey to produce this grid. This grid was calculated using an algorithm from the INTREPID Geophysics software package. This grid shows the magnetic response of subsurface features with contrasting magnetic susceptibilities. The grid can also be used to locate structural features such as dykes.

Tags: 1VD, Australia, EARTH SCIENCES, Earth sciences, GADDS2.0, NCI, Published_External, RTP, TMI, WA, airborne digital data, first vertical derivative, geophysical survey, geophysics, greyscale, grid, image, mag, magnetics, magnetism, palaeomagnetism, reduced to the pole, survey 5028, total magnetic intensity
Organization: Geoscience Australia Data
AusBathyTopo (Northern Australia) 30m 2018 - A regional-scale depth model (20180020C)

This dataset contains bathymetry (depth) products from the compilation of all available source bathymetry data within Northern Australia into a 30 m-resolution Digital Elevation Model (DEM).

The Northern Australia region includes a broad continental shelf over 400 km wide extending out from Western Australia and the Northern Territory, and stretching over a distance of ~1500 km.

This region encompasses numerous shallow coral reefs including the offshore Sahul Banks, sand cays, drowned ancient river valleys, broad inner-shelf banks and a rugged coastline.

Bathymetry mapping of the seafloor is vital for the protection of Northern Australia, allowing for the safe navigation of shipping and improved environmental management.

Shallow- and deep-water multibeam surveys have revealed the highly complex seafloor of the continental shelf and adjacent slope canyons draining into the Indian Ocean and Timor Sea.

Airborne LiDAR bathymetry acquired by the Australian Hydrographic Office cover most of the Sahul Banks reefs, with some coverage gaps supplemented by satellite derived bathymetry.

The Geoscience Australia-developed Intertidal Elevation Model DEM improves the source data gap along Northern Australia’s vast intertidal zone.

All source bathymetry data were extensively edited as point clouds to remove noise, given a consistent WGS84 horizontal datum, and where possible, an approximate MSL vertical datum.

Tags: AusSeabed, Compilation, DEM, HVC_144641, HVC_146413, Lidar bathymetry, Published_External, SRTM, bathymetry, bathymetry grid, continental shelf, elevation, marine, marine data
Organization: Geoscience Australia Data