AndreaBozzo/ceres-open-data-index huggingface dataset:
National Gravity Compilation 2019 - CSCBA 0.5VD 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 - CSCBA 0.5VD grid is derived 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). This gravity anomaly grid is 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 Airborne Gravity surveys totaling 345,000 line km and 106,000 line km of Airborne Gravity Gradiometry 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 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. Terrain corrections to gravity were calculated using both offshore bathymetry and onshore topography data. The grid shows half derivative of the complete Bouguer anomalies over Australia and its continental margins. A half vertical derivative was calculated by applying a fast Fourier transform (FFT) process to the complete spherical cap Bouguer anomaly grid of the 2019 Australian National Gravity Grids A series to produce this grid.

Tags: 05vd, A series, Australia, Bouguer, EARTH SCIENCES, Earth sciences, GADDS2.0, NCI, None, Published_External, complete, geophysical survey, geophysics, grav, gravity, grid, ground digital data, half vertical derivative, marine, national, raster, satellite, spherical cap, survey 202008
Organization: Geoscience Australia Data
Australia's Maritime Jurisdiction off Central Western Australia

Map showing Australia's Maritime Jurisdiction off Central Western Australia.
One of the 27 constituent maps of the "Australia's Maritime Jurisdiction Map Series" (GeoCat 71789).
Depicting Australia's extended continental shelf approved by the Commission on the Limits of the Continental Shelf in April 2008 and various maritime zones.  Background bathymetric image is derived from a combination of the 2009 9 arc second bathymetric and topographic grid by GA and a grid by Smith and Sandwell, 1997. Background land imagery derived from Blue Marble, NASA's Earth Observatory.
A0 sized .pdf downloadable from the web.

Tags: AU-WA, Administrative Boundary, Earth Sciences, Published_External, Thematic Map, administrative boundaries, bathymetry, marine, marine jurisdiction
Organization: Geoscience Australia Data
Jervis Bay Infaunal species level data

Geoscience Australia carried out marine surveys in Jervis Bay (NSW) in 2007, 2008 and 2009 (GA303, GA305, GA309, GA312) to map seabed bathymetry and characterise benthic environments through co-located sampling of surface sediments (for textural and biogeochemical analysis) and infauna, observation of benthic habitats using underwater towed video and stills photography, and measurement of ocean tides and wave-generated currents. Data and samples were acquired using the Defence Science and Technology Organisation (DSTO) Research Vessel Kimbla. Bathymetric mapping, sampling and tide/wave measurement were concentrated in a 3x5 km survey grid (named Darling Road Grid, DRG) within the southern part of the Jervis Bay, incorporating the bay entrance. Additional sampling and stills photography plus bathymetric mapping along transits was undertaken at representative habitat types outside the DRG. 

Sample/species matrix of infaunal taxa derived from Van Veen  grab samples taken on the HMS Kimbla surveys GA0312 and GA0315 in Jervis Bay.

Tags: AU-NSW, Bathymetry Grid, CERF, Marine Data, Marine Geoscience, Published_External, marine, marine biodiversity
Organization: Geoscience Australia Data
Stresses in the Australian crust: evidence from earthquakes and in-situ stress measurements

Evidence from earthquake focal mechanisms, in situ stress measurements, and surface deformations indicate that the Australian continent is in a state of substantial horizontal compression. Reliable focal mechanism determinations are now available from eight earthquakes that have occurred in several parts of the continent since 1967. Each of these mechanisms indicates that the faulting associated with the earthquakes was caused by compressive stress acting close to horizontal. In situ measurements made in mines and tunnels, and close to the surface in quarry floors or on rock outcrops, also indicate horizontal compressive stress in all areas. Near the epicentres of the 1968 Meckering and 1970 Calingiri earthquakes, shallow over-coring measurements (&lt;10 m) were carried out to compare the in situ observations with the earthquake focal mechanisms and surface faulting. The measurements were made in competent granite at seven locations along a 200 km north-south traverse. The results indicate a high regional compressive stress acting about 77Â°E of N. This agrees well with the 91Â° and 102Â°E of N directions for the pressure axes obtained respectively from the earthquake focal mechanisms. The highest stress (23 MPa) was measured at the site farthest north from the Meckering epicentre, and the lowest stress was close to that epicentre where the maximum principal stress was about 4 MPa. During 1978 and 1979 several sites in NSW were tested at depths ranging from 3 to 9 m. At each site the stress measured was compressive. In the eastern part of the State at Buckleys Lake, Jindabyne, Milton, and Moruya the axes of maximum compression were north-south, but in the west at Ardlethan, Mirrool, Berrigan, and Tocumwal the stresses are close to east-west, agreeing with the earlier results at Broken Hill and Cobar. The highest values of about 20 MPa were obtained in Silurian granite at Tocumwal. The results give principal stress orientation in different directions for different regions of the continent; it is therefore clear that simple models derived from plate tectonic concepts cannot be applied directly to explain the high observed stresses or their directions.

Tags: AUS, Earth Sciences, GA Publication, Journal, Published_External, marine
Organization: Geoscience Australia Data
Videos, images, and bathymetry from GA0337 (Flinders Commonwealth Reserve survey)

A survey of the Flinders Commonwealth Marine Reserve (GA survey 0337) was conducted aboard the R.V. Challenger between Tuesday, August 7th 2012 and Thursday, August 16th 2012, in collaboration with CSIRO Hobart and the University of Tasmania as part of GA's commitment to the National Environmental Research Programme (NERP)'s Marine Biodiversity Hub (Theme 1).  The survey collected video using a lightweight towed camera system, as well as footage from a camera mounted on the Smith-MacIntyre sediment grab. Bathymetry data was collected using GA's EM3002 system running in single head mode.

The aims of the survey were to characterize benthic habitat in the Flinders Commonwealth Marine Reserve using a Generalized Random Tessellation Stratified (GRTS) sample design.

The camera files are organized according to date collected and are labelled using the camera shot number and GRTS sample number.

Tags: Earth Sciences, HVC_144640, Multimedia, NERP, Published_External, marine
Organization: Geoscience Australia Data
The Mesozoic Carpentaria Basin and the Cainozoic Karumba Basin, north Queensland

The Jurassic - Cretaceous Carpentaria Basin of northern Queensland and eastern Northern Territory and adjacent marine areas approximates to the Gulf of Carpentaria and its eastern and southern hinterland (Fig. 1). The Cainozoic Karumba Basin overlies the Carpentaria Basin; its boundaries are the watersheds of the Gulf of Carpentaria drainage basin (Fig. 18). This Bulletin and its maps are a summary and a synthesis of geological information collected during field surveys which began in 1969 by combined parties of the Bureau of Mineral Resources (BMR) and the Geological Survey of Queensland (GSQ), and of all other geological investigations in the area. It also includes a review of geophysical surveys of both Basins. Local detail can be found in the Progress Reports. Explanatory Notes, and papers listed in Tables 1 and 2. Geological mapping was based on the use of aerial photographs of the RC9 Series (1:80 000) except in the northeast of Cape York Peninsula where the older K17 series (1:48 000) and other aerial photographs were used to obtain complete coverage. Landsat imagery was used to supplement aerial photographs. Mapping was supplemented by shallow stratigraphic drilling and augering (see Table 1) and by wire-line logging of water and other bores under contract (Down Under Well Services Pty Ltd) and by personnel from Geophysical Branch, BMR. Smart &amp; others (1974) list details of holes logged; copies of logs are held by BMR, GSQ. and the Irrigation and Water Supply Commission (IWSC), Brisbane.

Tags: AU-QLD, Bulletin, Earth Sciences, GA Publication, Published_External, geology
Organization: Geoscience Australia Data
Coastal and Estuarine Studies: Interactions between Macro- and Microorganisms in Marine Sediments

Marine sediments support complex interactions between macro- and microorganisms.  What is the state of the science on such interactions from costal and estuarine environments to the deep sea? How does such knowledge effect environmental management? And what does future research hold in store for scientists, engineers, resource managers, and educators?

Marine Sediments: Interactions between Macro- and Microorganisms responds to these questions, and more, by focusing on: 

-Interactions between plants, microorganisms, and marine sediment 
  -Interactions between animals, microorganisms, and marine sediment 
  -Interactions between macro- and microorganisms and the structuring of benthic communities 
  -Impact of animal and plant activity on sediment geochemistry 
  -Conceptual and numeric models of interactions between macro- and microorganisms  

Here is an authoritative overview of the research, experimentation and modeling approaches now in use in our rapidly evolving understanding of life in marine sediments.

Tags: Earth Sciences, External Publication, Monograph, Published_External, marine
Organization: Geoscience Australia Data
Numerical techniques applied to the geochemistry of some estuarine sediments from Broad Sound, Queensland

Q-mode factor analysis classified the estuarine samples from Broad Sound into two main geologically distinct groups representing intertidal and supratidal deposition. This classification was supported statistically by stepwise discriminant analysis, and mathematically by Q-technique canonical correlation analysis. Analysis of variance was useful in identifying significant error with some of the measured variables, and proving the stability of the pH and Eh readings over time. Using R-mode factor analysis, with the associated correlation coefficients, and stepwise regression analysis, the various processes controlling the concentration of P2O5, Cu, Pb and Zn, in the supratidal and intertidal sediments are identified. Although Cu, Pb, and Zn are mainly deposited in both supratidal and intertidal zones adsorbed onto iron hydroxide colloids, the three trace elements (but especially Pb) are released with decreasing pH and Eh in the intertidal zone and form metal sulphides or metallo-organic complexes. The reduced iron is also redeposited as iron sulphide. Under supratidal oxidizing conditions the Cu and Zn remain attached to the iron colloids but Pb is released with increasing acidity. The absorption of P2O5 on clay particles increases with acidity in the intertidal zone, but P2O5 is mainly associated with organic carbon in the supratidal sediments.

Tags: Earth Sciences, GA Publication, Journal, Published_External, QLD, marine
Organization: Geoscience Australia Data
Marine Seismic Surveys Shape files and Kml files

Geoscience Australia has been updating its collection of navigation for marine seismic surveys in Australia. These include original navigation files, the 2003 SNIP navigation files and digitised survey track maps. The result will be an updated cleansed navigation collection.

The collection is based on the SNIP format P190 navigation file which follows the UKOOA standard. Industry standard metadata associated with a seismic survey is preserved.

To assist industry, Geoscience Australia is making available its updated version of cleansed navigation. Although the process of updating the navigation data is ongoing and there is still legacy data to check, the navigation data is at a point where a significant improvement has been achieved and it is now usable. Users should be aware that this navigation is not final and there may be errors. Geoscience Australia (email - AusGeodata@ga.gov.au) appreciates being notified of any errors found.

The data is available in both KML and Shape file formats.

The KML file can be viewed using a range of applications including Google Earth, NASA WorldWind, ESRI ArcGIS Explorer, Adobe PhotoShop, AutoCAD3D or any other earth browser (geobrowser) that accepts KML formatted data.

Alternatively the Shape files can be downloaded and viewed using any application that supports shape files.

Disclaimer: Geoscience Australia gives no warranty regarding the data downloads provided herein nor the data's accuracy, completeness, currency or suitability for any particular purpose. Geoscience Australia disclaims all other liability for all loss, damages, expense and costs incurred by any person as a result of relying on the information in the data downloads.

Tags: Earth Sciences, GIS Dataset, National, National dataset, Published_External, marine, marine survey, navigation, seismics
Organization: Geoscience Australia Data
Australia's Maritime Jurisdiction off the Australian Antarctic Territory (West)

Map showing Australia's Maritime Jurisdiction off the western portion of the Australian Antarctic Territory.
One of the 27 constituent maps of the "Australia's Maritime Jurisdiction Map Series" (GeoCat 71789).
Depicting Australia's extended continental shelf approved by the Commission on the Limits of the Continental Shelf in April 2008 and various maritime zones.  Background bathymetric image is derived from a  grid by Smith and Sandwell, 1997.  Background land imagery derived from Blue Marble, NASA's Earth Observatory.
A0 sized .pdf downloadable from the web.

Tags: AQ, Administrative Boundary, Earth Sciences, Published_External, Thematic Map, administrative boundaries, bathymetry, continental shelf, marine jurisdiction
Organization: Geoscience Australia Data
Report on the geology of Manus Island, Territory of Papua and New Guinea with reference to the occurrence of bauxite

During a geological reconnaissance of Manus Island, nodular bauxite deposits were observed in three widely separated localities. The occurrences are not laterally connected. Two are derived from basaltic flows and the third is formed over a medium-grained rock probably of tuffaceous origin. These volcanic rocks are products of a comparatively recent vulcanism and they unconformably overlie recrystallised limestones and marine tuffaceous sediments deposited on a plutonic basement. Palaeontological evidence of the age of these sediments is lacking but it is probable that they are Miocene or younger. The volcanics are sub-horizontal or possess a low primary dip determined by the underlying surfaces. The process of bauxitization has been more rapid than usual indicating that physiographic and petrographic conditions have been particularly favourable. Present day conditions of high temperatures, high rainfall and slow drainage are recognised as favourable. It is probable that these conditions have prevailed since the volcanics were laid down and that bauxitization is still proceeding. Regional considerations suggest that the bauxites will be widespread, particularly over the western end of the island. The deposits described were only observed as residual concentrations of bauxite nodules at the surface. They have not been tested as depth. The results of analyses of individual nodules from two of the deposits show a high available alumina content. Further prospecting and testing at depth, particularly in the west, is strongly recommended.

Tags: GA Publication, Geology, PG, Published_External, Record, geology, mineral deposits, stratigraphy, structural geology, topography
Organization: Geoscience Australia Data
SI 1005 Torres Strait Under Keel Clearance Management Area, Torres Strait, QLD (HIPP) Bathymetry Acquisition (20210012S)

The Torres Strait Under Keel Clearance Management Area bathymetry survey was acquired for the Australian Hydrographic Office (AHO) onboard the MV Sea Ranger and SMB White Shark during the period 1 Dec 2021 – 24 Jan 2022. This was a contracted survey conducted for the Australian Hydrographic Office by EGS Survey Pty. Ltd. as part of the Hydroscheme Industry Partnership Program. The survey area encompases an area in Torres Strait, Queensland. Bathymetry data was acquired using a Kongsberg EM2040D and a Kongsberg EM 2040C, and processed using QPS Qimera processing software. The dataset was then exported as a 30m resolution, 32 bit floating point GeoTIFF grid of the survey area.

This dataset is not to be used for navigational purposes.

Tags: AusSeabed, EARTH SCIENCES, Earth Science | Oceans | Bathymetry/Seafloor Topography | Bathymetry, HVC_144641, Oceans, Published External, Published_External, bathymetric grids, bathymetry, marine, multibeam
Organization: Geoscience Australia Data
Seismic Velocity Models of the Sediments and Upper Crust of the Capel and Faust Basins, Lord Howe Rise

This report is a description of velocity data acquired during the summer of 2006/07 on Geoscience Australia's seismic marine reflection, refraction and potential field survey GA302 over the Capel and Faust Basins, Lord Howe Rise. 

The survey was the final phase of the Australian Government's Big New Oil initiative commenced in 2003 to support acreage release in frontier basins. Previous data over the region are sparsely located, and the present survey will provide explorers with high quality data acquired and processed to modern standards.

The Lord Howe Rise is thought to be a continental fragment detached from Australia during the formation of the Tasman Sea. The Capel and Faust Basins are of interest as possible frontier petroleum provinces, and the present work is aimed at improving the confidence of sediment thickness estimation, a critical parameter in evaluating of prospectivity.

The study reviews the seismic reflection data from survey GA302, the sonobuoy refraction data acquired, and the stacking velocities from the seismic reflection processing.

Tags: Earth Sciences, GA Publication, Published_External, Record, petroleum exploration, sedimentary basins, seismic sections, seismics
Organization: Geoscience Australia Data
Seamounts, Canyons and Reefs of the Coral Sea Marine Park

This flythrough video highlights deep and mesophotic seabed environments within the Coral Sea Marine Park, offshore northeastern Australia. The mesophotic zone, commonly referred to as the ‘twilight zone’ represents the depth range below the brightly lit shallow waters down to the maximum depth that sunlight can penetrate for photosynthesis to occur (~ 30 to 150 meters beneath the sea surface). The featured Malay and North Flinders Reefs represent mid-ocean platform reefs and Cairns Seamount hosts a thriving coral reef community atop what is likely an extinct volcanic cone. These locations represent a range of benthic communities, which vary with depth and substrate type. Soft-sediments (sands, muds and oozes) dominate the deep seafloor, with evidence of water currents that produce bedforms showing active sediment transport at these depths. The walls and flanks of the platform reefs are very steep, with evidence of slope failure where rocky head walls have collapsed and deposited large blocks and boulders on the seafloor, which provide important habitat for sessile and mobile invertebrates including soft corals and sponges as well as cryptic octopus. 

Typical mesophotic habitats included vast Halimeda algal meadows and rhodolith beds interspersed with soft corals and sponges on soft-sediment. Hard substrates were typically colonised by plate and encrusting hard Scleractinian corals (e.g. Leptoseris and Montipora species), sponges and ascidians. Many large black corals (Antipatharia) and gorgonians (Octocorallia) also featured, with several black coral and carnivorous sponge observations representing new species. The reef community atop Cairns Seamount was highly diverse and included many demersal and pelagic fish species. A high abundance and diversity of gelatinous zooplankton were observed in the deep waters between reefs in the Coral Sea, with several new range extensions recorded.

Bathymetry data and seafloor imagery for this flythrough were collected on RV Falkor, owned and operated by the Schmidt Ocean Institute (SOI), during surveys FK200830 and FK200902 in August and October 2020. These surveys were led by Geoscience Australia and James Cook University. Collaborative research partners included the Japan Agency for Marine-Earth Science and Technology, The University of Tokyo, Queensland University of Technology, Queensland Museum, The University of Sydney, University of Tasmania and the University of Wollongong.

Tags: Coral Sea, EARTH SCIENCES, Geomorphology and Regolith and Landscape Evolution, Published_External, bathymetry, biota, marine, mesophotic
Organization: Geoscience Australia Data
Topographic Aspect Grid of Darwin Harbour

The topographic Aspect grid represents the angle of aspect of the seabed in the Darwin Harbour survey area. The Aspect grid was created from the bathymetry grid of Darwin Harbour obtained from the survey onboard the Matthew Flinders. Please see the Metadata of the bathymetry grid for details (GeoCat: 74915).

Tags: AU-NT, Bathymetry Grid, Marine Data, Marine Geoscience, Published_External, bathymetry, marine
Organization: Geoscience Australia Data