AndreaBozzo/ceres-open-data-index huggingface dataset:
North Pilbara National Geoscience Mapping Accord project (1995-2000) - Scientific highlights

This paper describes the highlights of AGSO's work in the North Pilbara Project, a joint AGSO-Western Australia Geological Survey (GSWA) effort conducted under the National Geoscience Mapping Accord (NGMA) between 1995 and 2000. One of the principal drivers for AGSO's research in the Pilbara was the possible inapplicability of exploration models and genetic interpretations of Archaean mineral deposits because these models were commonly based upon late Archaean examples. One of our goals was to document the differences between the late Archaean and the early-mid Archaean mineral systems, and to develop regional thematic synthesis datasets so that more robust models could be developed to encompass the entire Archaean era. These datasets, together with our research into new exploration tools, have, and continue to assist exploration in the Pilbara. Our results also have applications to other terranes.

Tags: AU-WA, Earth Sciences, GA Publication, Published_External, Research Newslttr Paper, economic geology, marine
Organization: Geoscience Australia Data
A New High-resolution Depth Model for the Terre AdÃ©lie and George V Shelf and Margin, East Antarctica

Abstract: The Collaborative East Antarctic Marine Census (CEAMARC) surveys to the Terre AdÃ©lie and George V shelf and margin highlight the requirement for a revised high resolution depth model that can be used as a spatial tool for improving physical models of the region. We have combined available shiptrack and multibeam bathymetry, coastline
and land topographic data to develop a new high-resolution depth model, called GVdem. GVdem spans an area 138Â°E to 148Â°E longitude and 63Â°S to 69Â°S latitude, with a choice of three ESRI grids with cell pixel sizes: 15 arcsec, 9 arcsec and 3.6 arcsec. The revised depth model is an improvement over previously available regional-scale grids, and highlights seabed physiographic detail not previously observed for this part of East Antarctica. In particular, the extent and complexity of the inner-shelf depressions are revealed and their relationship with large shelf basins and adjacent flat-topped banks.

Tags: AQ, Antarctic data, Earth Sciences, External Publication, Published_External, Scientific Journal Paper, bathymetry, geomorphology, marine, multibeam
Organization: Geoscience Australia Data
A Review of Petroleum Exploration and Prospects in the Gippland Basin

Petroleum exploration carried out in the Gippsland Basin up to February 1976 has been reviewed to provide a current assessment of knowledge of the basin and to determine the need for further exploration.

The Gippsland Basin is a Late Mesozoic to Cainozoic Basin located mainly offshore in the northeastern portion of Bass Strait, between the mainland of Australia and Tasmania. It is roughly triangular in shape, being narrowest onshore in Victoria to the northwest and broadening towards the edge of the continental slope to the southeast. It contains up to 4500 in of fluvio-deltaic and marine sediments, which have been subjected to faulting, drape folding and channel erosion.

To date, the Gippsland Basin has been by far the most prolific petroleum producing basin in Australia, with initial reserves of more than 300 x 106 m3 of oil and 200 x 109 m3 of natural gas. The basin has been actively explored geophysically since the early 1960s and all of the larger and more obvious structures have been drilled. The basin still has some exploration potential at deeper levels than the main Eocene producing zones, but detailed seismic mapping of deeper horizons is difficult and
requires the best seismic technology available.

It seems likely that the greater part of the recoverable petroleum in the basin has already been found, but there is some potential for further discoveries.

Tags: Earth Sciences, GA Publication, Published_External, Record
Organization: Geoscience Australia Data
Influence of Climate Fluctuations and Changes in Catchment Land Use on Late Holocene and Modern Beach-ridge Sedimentation on a Tropical Macrotidal Coast: Keppel Bay

Beach ridges at Keppel Bay, central Queensland, Australia, preserve a record of sediment accumulation from the historical period back to middle Holocene times. The ridges comprise fine, well-sorted, feldspar-rich quartz sand that was eroded from the Fitzroy River catchment, deposited in Keppel Bay during floods of the Fitzroy River, and reworked onshore into beach and foredune deposits by the prevailing currents, waves and wind. These floods have an average recurrence interval of at least 7 yr and are induced by the passage of cyclones onshore into the large Fitzroy catchment. The youngest series of beach ridges sit sub-parallel to the modern beach and comprise six accretional units, each unit formed by a set of ridges and delineated by prominent swales. Optically stimulated luminescence (OSL) ages of beach ridges in these units indicate they were deposited in periods of rapid progradation approximately 1500, 1000, 450 and 230 yr BP, when there was an enhanced supply of sediment to the beach from the Fitzroy River via Keppel Bay. Estimates of the mass of sediment stored in the beach-ridge strandplain show that it represents a significant sediment store, potentially trapping the equivalent of 79% of the estimated long-term (100 yr) average annual bedload of the Fitzroy River that is deposited in Keppel Bay. There has been a reduction in the rate of sediment accumulation in the strandplain since around 1000 yr BP, which is consistent with other coastal records in eastern Australia of a relatively wetter phase of climate in the late Holocene compared to the present. The youngest beach ridges (OSL ages &lt; 100 yr BP) are tall relict foredunes that reflect a low rate of sediment accumulation. These ridges have a distinctive trace-element composition produced by a greater contribution from catchment areas with basaltic soils. The change in catchment provenance has likely been a consequence of erosion that followed clearing of native vegetation in these areas. Our findings demonstrate the important insights that beach-ridge deposits proximal to a river sediment source can provide into processes of sediment accumulation and the response to variations in climate in tropical coastal sedimentary systems.

Tags: AU-QLD, Earth Sciences, External Publication, Published_External, Scientific Journal Paper, climate, coasts, marine, palaeoclimatology, stratigraphy
Organization: Geoscience Australia Data
National Gravity Compilation 2019 DGIR 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 DGIR 0.5VD 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 this 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 grid shows the half vertical derivative of the de-trended global isostatic residual anomalies (A series) over Australia and its continental margins. The original 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. A half vertical derivative was calculated by applying a fast Fourier transform (FFT) process to the DGIR grid of the 2019 Australian National Gravity Grids to produce this grid.

Tags: 05vd, A series, Australia, EARTH SCIENCES, Earth sciences, GADDS2.0, NCI, None, Published_External, de-trended, geophysical survey, geophysics, grav, gravity, grid, ground digital data, half vertical derivative, isostatic, marine data, national, raster, residual, satellite data, survey 202008
Organization: Geoscience Australia Data
Bynoe Harbour Habitat Mapping Survey 2016: Chlorins and porosity data for seabed sediments

This resource contains surface sediment data for Bynoe Harbour collected by Geoscience Australia (GA), the Australian Institute of Marine Science (AIMS) and Department of Land Resource Management (Northern Territory Government) during the period from 2-29 May 2016 on the RV Solander (survey SOL6432/GA4452). This project was made possible through offset funds provided by INPEX-led Ichthys LNG Project to Northern Territory Government Department of Land Resource Management, and co-investment from Geoscience Australia and Australian Institute of Marine Science. The intent of this four year (2014-2018) program is to improve knowledge of the marine environments in the Darwin and Bynoe Harbour regions by collating and collecting baseline data that enable the creation of thematic habitat maps that underpin marine resource management decisions. The specific objectives of the survey were to: 
1. Obtain high resolution geophysical (bathymetry) data for outer Darwin Harbour, including Shoal Bay; 
2. Characterise substrates (acoustic backscatter properties, grainsize, sediment chemistry) for outer Darwin Harbour, including Shoal Bay; and 
3. Collect tidal data for the survey area. Data acquired during the survey included: multibeam sonar bathymetry and acoustic backscatter; physical samples of seabed sediments, underwater photography and video of grab sample locations and oceanographic information including tidal data and sound velocity profiles.

This dataset comprises total chlorin concentrations, chlorin indices and porosity measured on seabed sediments. 

A detailed account of the survey is provided in Siwabessy, P.J.W., Smit, N., Atkinson, I., Dando, N., Harries, S., Howard, F.J.F., Li, J., Nicholas W.A., Picard, K., Radke, L.C., Tran, M., Williams, D. and Whiteway, T., 2016. Bynoe Harbour Marine Survey 2017: GA4452/SOL6432 Post-survey report. Record 2017/04. Geoscience Australia, Canberra. 

Thanks to the crew of the RV Solander for help with sample collection, Matt Carey, Craig Wintle and Andrew Hislop from the Observatories and Science Support at Geoscience Australia for technical support and Jodie Smith for reviewing the data. This dataset is published with the permission of the CEO, Geoscience Australia

Tags: Earth Sciences, Published_External, baseline information, continental shelf, geochemistry, marine, seabed
Organization: Geoscience Australia Data
Remotely Sensed Seasonal Shoreward intrusion of the East Australian Current: Implications for Coastal Ocean Dynamics

The East Australian Current (EAC) onshore encroachment drives coastal upwelling and shelf circulations, changes slope-shelf bio-physical dynamics, and consequently exerts significant influence on coastal marine ecosystem along the south-eastern Australian margin. The EAC is a highly dynamic eddy-current system which exhibits high-frequency intrinsic fluctuations and eddy shedding. As a result, low-frequency variability in the EAC is usually overshadowed and rarely detectable. For decades, despite many efforts into the ocean current observations, the seasonality of EAC’s shoreward intrusion remains highly disputable. In this study, for the first time we use a long-term (26 years) remotely sensed AVHRR Sea Surface Temperature (SST) dataset spanning 1992-2018 to map the EAC off the coast of northern New South Wales (NSW), between 28°S - 32.5°S. A Topographic Position Index (TPI) image processing technique was applied to conduct the quantitative mapping. The mapping products have enabled direct measurement (area and distance) of the EAC’s shoreward intrusion. Subsequent spatial and temporal analyses have shown that the EAC move closer to the coast in austral summer and autumn than in austral winter, with the mean distance-to-coast ~6 km shorter and occupying the shelf area ~12% larger. This provides quantitative and direct evidence of the seasonality of the EAC’s shoreward intrusion. Such seasonal migration pattern of the EAC thus provides new insights into the seasonal upwelling and shelf circulations previously observed in this region. As a result, we were able to confirm that the EAC is a driving force of the seasonal ocean dynamics for the northern NSW coast.

Tags: EARTH SCIENCES, New South Wales - NSW, Published_External, coastal upwelling, quantitative mapping, satellite remote sensing, shelf circulation, spatial analysis, the East Australian Current - EAC
Organization: Geoscience Australia Data
National Gravity Compilation 2019 includes airborne DGIR 1VD 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 includes airborne DGIR 1VD grid is produced from the 2019 Australian National Gravity Grids B 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. Airborne gravity and gravity gradiometry data were also included to provide better resolution to areas where ground gravity data was not of a suitable quality. 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 and airborne gravity data used in this 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. Airborne surveys have a line spacing ranging from 0.5 km to 2.5 km. The grid shows the first vertical derivative of the de-trended global isostatic residual (DGIR) anomalies over Australia and its continental margins. The DGIR grid 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 B series. A first vertical derivative was calculated by applying a fast Fourier transform (FFT) process to the DGIR grid of the 2019 Australian National Gravity Grids to produce this grid.

Tags: 1vd, Australia, B series, EARTH SCIENCES, Earth sciences, GADDS2.0, NCI, None, Published_External, airborne data, de-trended, first vertical derivative, geophysical survey, geophysics, grav, gravity, grid, ground digital data, isostatic, marine data gravity gradiometry, national, raster, residual, satellite data, survey 202008
Organization: Geoscience Australia Data
FK150301 Henderson Perth Canyon to Henderson Bathymetry 2015 (4441/20150012S)

The FK150301 bathymetry Survey/Acquisition was acquired by University of Western Australia onboard the Research Vessel Falkor during the period 1st of March 2015 to 12th March 2015 using the Sensor/Instrument Kongsberg EM302 (30 kHz), EM710 (30 kHz) 

A primary goal for the mission was to run ROV (Remotely Operated Vehicle) surveys at various depths to assess what animals might be found, their abundance, and the best sites for more focused research. The researchers expected to find a range of species including corals, sponges, sea fans, sea pens, urchins, sea stars, and large fish including sharks. While researchers had ideas of what they would see, having never actually explored the canyon there was no telling what they might find. Species new to science are always a possibility, especially during deeper dives. 

Appropriate acknowledgment must be given to both the original scientists (Professor Malcolm McCulloch)(https://www.marine-geo.org/tools/search/DataSets.php?data_set_uids=22296,22297) and to the Marine Geoscience Data System (www.marine-geo.org).

This dataset is published with the permission of the CEO, Geoscience Australia.

Not to be used for navigational purposes

Tags: AusSeabed, Australia-wide geoscience data, Bathymetry, EARTH SCIENCES, Indian Ocean, Marine, Offshore Mapping, Published_External, RV Falkor, Resourcing Australia’s Prosperity, multi-beam echosounders
Organization: Geoscience Australia Data
Offshore Petroleum and Greenhouse Gas Storage Act 2006 - Australian Maritime Boundaries 2014a (AMB2014a) - Geodatabase

Geoscience Australia has the primary role in the delineation of Australia's domestic and international maritime limits and boundaries. An output of this activity is the development of the Australian Maritime Boundaries (AMB) data. AMB2014 is a GIS data product, replacing AMBIS 2006, providing access to the data for Australia's maritime zones. Offshore Petroleum and Greenhouse Storage Act 2006 - Australian Maritime Boundaries Dataset 2014 is a digital representation of the scheduled and offshore areas defined under this Act. In the event of an inconsistency between AMB data and the limits under any legislation, the latter prevails. The data have been published by Geoscience Australia in consultation with other relevant Commonwealth Government agencies including the Attorney-General's Department, the Department of Foreign Affairs and Trade and the Australian Hydrographic Office. 

This version contains a number of technical amendments made on the basis of user feedback. These include:
- Harmonisation of maritime boundaries, scheduled area and graticular block datasets in block SC51

Offshore Petroleum and Greenhouse Storage Act 2006 - Australian Maritime Boundaries Dataset 2014 comprise the scheduled and offshore areas defined under the Act. AMB Data can also be viewed on-line via AMSIS (http://www.ga.gov.au/marine/jurisdiction/amsis.html). Product Specifications Coverage: Australia including all external territories Currency: May 2014. Coordinates: Geographical Datum: GDA94 (functionally equivalent to WGS84). Format: ESRI Geodatabase and REST web service - free online.

The area of coverage of the AMB data is for the whole of the Australian marine jurisdiction which includes waters adjacent to the mainland, offshore islands and External Territories.  The geographical extent is approximately between the latitude limits of 8 S to 70 S and the longitude limits 39 E to 174 E.

This dataset includes the following disclaimers:
AMB data is a digital representation of the territorial sea baseline and of the outer limits of Australia's maritime zones.  The baseline and zones are established under the Offshore Petroleum and Greenhouse Storage Act 2006.  In the event of an inconsistency between AMB data and the areas under the legislation, the latter prevails.

Tags: AU, GIS Dataset Thematic, Geospatial Information Systems, HVC_144653, Published_External, marine
Organization: Geoscience Australia Data
The Cretaceous of the Eromanga and Surat Basins

Little deformed Cretaceous sedimentary rocks underlie 1 500 000 km^2 of eastern Australia. Depositional environments in them range from freshwater to shallow marine. The Neocomian and Aptian sequences are quartz-rich, and the Albian and Cenomanian sequences are quartz-poor. The older sequences were derived largely from nearby basement rises, while the younger sequences were probably derived from Cretaceous volcanics forming a mountain range to the northeast. Glauconie is common in marine and paralic sequences. An epicontinental sea, with seaways to the north and east, covered the basins in the late Aptian, but the eastern seaway closed during an early Albian regression. A second transgressive-regressive cycle, in the late Albian, was virtually confined to the Eromanga Basin. Collectively the two transgressions and regressions were spread over about 20 million years. The present Baltic Sea is thought to provide a small-scale depositional model for the sequences under consideration: of an epicontinental sea in a cool climate, in which the salinity, the number of planktonic organisms, and the variety of benthonic organisms, decrease away from the ocean. The shallowness of the sea and its entrances mean that it is very susceptible to major environmental changes, caused by such factors as eustatic changes of sea level. The area had a gentle northwesterly regional tilt during the Cretaceous, but mid-Tertiary movements changed this to southwesterly. Despite subsequent erosion, as much as 2000 m of Cretaceous sediment is preserved in the Eromanga Basin, and 700 min the Surat Basin.

Tags: Earth Sciences, GA Publication, Journal, Published_External
Organization: Geoscience Australia Data
Lord Howe Island feeding guild spreadsheet

Geoscience Australia carried out a marine survey on Lord Howe Island shelf (NSW) in 2008 (SS06_2008) to map seabed bathymetry and characterise benthic environments through colocated sampling of surface sediments and infauna, rock coring, observation of benthic habitats using underwater towed video, and measurement of ocean tides and wave generated currents. Subbottom profile data was also collected to map sediment thickness and shelf stratigraphy. Data and samples were acquired using the National Facility Research Vessel Southern Surveyor. Bathymetric data from this survey was merged with other preexisting bathymetric data (including LADS) to generate a grid covering 1034 sq km. As part of a separate Geoscience Australia survey in 2007 (TAN0713), an oceanographic mooring was deployed on the northern edge of Lord Howe Island shelf. The mooring was recovered during the 2008 survey following a 6 month deployment.

Feeding guild counts per sample.  Aggregated from species level data in LHI_Infauna_species (27Oct10).csv using the information in LHI_taxa_info.xls

Tags: AU-NSW, Bathymetry Grid, CERF, Marine Data, Marine Geoscience, Published_External, marine, marine biodiversity
Organization: Geoscience Australia Data