AndreaBozzo/ceres-open-data-index huggingface dataset:
Arc-continent collision and orogenesis in western Tasmanides: insights from reactivated basement structures and formation of an ocean-continent transform boundary off western Tasmania

Crustal architecture in formerly contiguous basement terranes in SE Australia, Tasmania and northern Victoria Land is a legacy of late Neoproterozoic-Cambrian subduction-related processes, culminating in formation of the Delamerian-Ross orogen. Structures of Delamerian-Ross age were subsequently reactivated during late Mesozoic-Cenozoic Gondwana breakup, strongly influencing the geometry of continental rifting and providing clues about the origins and configuration of the pre-existing basement structures. An ocean-continent transform boundary developed off western Tasmania follows the trace of an older Paleozoic strike-slip structure (Avoca-Sorell fault) optimally oriented for reactivation during final separation of Australia from Antarctica. This boundary cuts across rocks preserving an earlier record of arc-continent collision during the course of which continental crust was subducted to mantle depths and Cambrian mafic-ultramafic island arc rocks were emplaced westwards over late Neoproterozoic passive margin sequences deposited during Rodinia breakup. Following a change to transcurrent motion along the Gondwana margin, Tasmania migrated northward along the Avoca fault system. This process arrested with entry of continental crust (Selwyn block) into a subduction zone located along the Heathcote-Governor fault systems, precipitating a second collision event accompanied by south-vergent thrusting, blueschist facies metamorphism and tectonic reworking of the already accreted Cambrian arc-forearc complex and underlying passive margin sequences.

Tags: AU-NSW, AU-TAS, AU-VIC, Article, Earth Sciences, External Publication, Published_External, continental margins, cultural boundaries, marine, structural geology
Organization: Australian Ocean Data Network
Seabed imagery from IN2017_V01, Sabrina Seafloor survey, East Antarctica

Six camera tow transects were completed during survey IN2017-V01 on the RV Investigator in January to March 2017. This survey focussed on the upper slope and outer continental shelf on the Sabrina Coast seafloor in East Antarctica. Camera tows targeted seafloor depths between 480 and 1680 m. Imagery was collected using the Marine National Facilities Deep Tow Camera. This system collects oblique downward facing still images with a Canon 1DX and high definition video with a Canon C300. Four DSP&amp;L 3150 High Output SeaLite Sphere lights were used, with MicroSeaLasers providing a 10cm scale guide on the images. Several sensors are also attached to the towed body, including a SBE 37 for CTD measurements, a Kongsberg Mesotech – 1007D altimeter, a Druck PMP 5074 pressure sensor and two Sonardyne USBLs for locational accuracy of the towed body. The USBL failed for tow A008CAM02, with locations recorded as ship’s position instead and camera position based on layback calculations. Images failed to record on A004CAM01, with only 2 images saved. Due to a timing error between the images and the other sensors, there is an offset between the CTD, altimeter and pressure data and the images. This is currently being resolved by the MNF. Tows were designed to run down slope to reduce potential for colliding with the bottom. All tows were run with a ship speed over the ground of approximately 2 kt. All still images were saved in jpeg format with video footage recorded to HD1080i50 format. The video data is unclipped and includes descent and ascent in the water column. Following collection still images were colour corrected in Adobe Photoshop to remove the blue bias. 

Images are available on the NCI with the following file structure:
MARINE IMAGERY COLLECTION
└─ PLATFORM_NAME
   └── CAMPAIGN_NAME
      └─── DEPLOYMENT_NAME
         ├───── images/
         └────── metadata.csv
Where
- PLATFORM_NAME is the name of the platform (e.g. Towed still imagery, Towed video imagery)
- CAMPAIGN_NAME is the name of a campaign (e.g. IN2017_V01)
- DEPLOYMENT_NAME is the name of the deployment or dive (e.g. IN2017_V01_A04_CAM01 is the voyage name, following by station number, followed by camera tow number)
- images/ is a directory containing video and still image files
- metadata.csv is a file containing position info and references to image files (e.g. timestamp, image_filename, depth from sensor on camera frame, altitude, CTD temperature, conductivity, pressure, dissolved oxygen, salinity, latitude, longitude and depth from USBL unless otherwise specified, comments)

We thank the Marine National Facility, the IN2017-V01 scientific party-led by the Chief Scientists L.K. Armand and P. O’Brien, MNF support staff and ASP crew members led by Capt. M. Watson for their help and support on board the RV Investigator. This dataset is published with the permission of the CEO, Geoscience Australia and according to MNF data policy.

Tags: Earth Sciences, East Antarctica, HVC_144640, Landscape Ecology, Published_External, marine ecology, seafloor
Organization: Australian Ocean Data Network
BRUVS (TM) - Fish and Benthic survey of Myrmidon Reef and Bowling Green Bay 2001-09-01 to 2001-09-06

The dataset comprises 1311 individuals from 33 species of fishes, sharks, rays and sea snakes observed at around Myrmidon Reef and Bowling Green Bay using 3 baited remote underwater video stations (BRUVS(TM)). 79 images were captured from these cameras.

Approximately 3500 of the best images from all BRUVS (TM) projects are stored in a reference library.

Data recorded concern:
- classification of the habitat in the field of view (topography, sediments, benthos)
- the identity of fish and CAABCODES
- their time of arrival
- their behaviour (8 categories, including feeding on the bait)
- their maturity (adult or juvenile)
- their relative abundance (as MaxN = the maximum number visible at one time, or distinguishable at different times as separate individuals e.g. much larger/smaller, male/female)
- the time elapsed before MaxN and feeding occurs.

A custom interface has been developed by AIMS staff, using Microsoft Access, for reading and analysis of BRUVS(TM) tapes.

Organization: Australian Ocean Data Network
RV Investigator Voyage IN2021_V01 EM710 MKII Multibeam Echosounder Data

This record describes multibeam echosounder data collected on RV Investigator voyage IN2021_V01,  titled: "Quantifying krill abundance for krill monitoring and management off the Australian Antarctic Territory," which departed Hobart on the 29th January 2021 and returned to Hobart on the 24th March 2021 (AEST).

The Kongsberg EM710 MKII multibeam echosounder was used to acquire seafloor bathymetry, backscatter information and watercolumn backscatter for only a short duration at the beginining of the voyage, followed by two short periods to assess mooring deployment locations. Mooring deployment site surveys carried out with the EM710 MKII were in the vicinity of the Antarctic shelf-break region with locations of approx. 66°57.2'S, 75°00.5'E &amp; 66°32'S, 62°13'E.

The EM710 MKII provides a 0.5° by 1° transmit and receive angular resolution respectively. The echosounder's nominal frequency range is from 40 to 100 kHz.

Data are stored in .all raw format for bathymetry and backscatter and .wcd format for watercolumn backscatter at CSIRO. There are 47 files totalling 15.82GB of raw data in this dataset.

Sound velocity profiles were applied to this data during data acquisition. Bathymetry data contained in *.all format are corrected for motion and position.

The data have been reduced to approximate Mean Sea Level (MSL) using the Earth Gravitation Model 2008 (EGM2008) 1 arc-minute grid. Tide corrections were not applied to the processed data. Processed data has had outliers removed. Processed line data are available in *.gsf and ascii format, and processed bathymetry and backscatter grids in geotiff format.

Additional information regarding this dataset, including further information on processing streams, is contained in the GSM data acquisition and processing report. Additional data products may be available on request.

Organization: Australian Ocean Data Network
Making knowledge of Geoscience Australia's data and information assets accessible to the external community

The role of Geoscience Australia (GA) is to provide first class geoscientific information and knowledge which enables government and community to make informed decisions about:
- the exploitation of resources
- the management of the environment
- the safety of critical infrastructure and
- the resultant wellbeing of all Australians.
GA has two internal catalogues which hold metadata of significant value to external researchers.  The catalogues include national collections of satellite images/datasets; geological and topographical maps of various scales; Maritime, Aboriginal Commission and Postcode boundary datasets, plus other geoscientific thematic maps and collections.  Staff from GA and ANDS worked together to analyse the catalogues, map them to the ISO19115 metadata schema and provide a gap analysis to inform further development.  The original intention was to cross walk the 19115 profile to RIF-CS and install an OAI-PMH harvest point.  ANDS, however, was able to utilise funded work by AuScope by having an instance of GeoNetwork deployed in GA, which provides this capability and can be leveraged to expose this data at the same time. This mapping also allows data of relevance to other disciplines such as that relevant to marine research to be identified and appropriate feeds established. 
The more significant achievement for GA was that it is now able to dynamically map from two existing independent internal catalogues to a single standards compliant instance, without having to first create a single internal catalogue and then migrate metadata from various catalogues into it. This approach will be used for other data types where GA has several internal databases of the same data type. 
This poster explores the issues that confronted the team, the solutions developed and the opportunities that have arisen.

Tags: Earth Sciences, GA Publication, Poster/Image, Published_External, data, data standards, geoscience databases, information management, metadata
Organization: Australian Ocean Data Network
WITHDRAWN: eReefs GBR1 biogeochemistry and sediments v3.2

This dataset was retired by its authors in February 2026 because the model used to generate it was discovered to have an error which lead to abnormally high/unrealistic Chlorophyll-a levels on the shelf edge and reef matrix. The values in the results dataset are not only inconsistent with the more recent GBR4_H4p0_ABARRAr2_OBRAN2020_FG2Gv3_B4p2_Cq5b_Dhnd dataset, but also scientifically unreasonable for these areas, where Chla should generally be ≤0.5 mg m⁻³ based on coral sea observations. Researchers should discontinue any use of this dataset as soon as possible.

Results from version 3.2 of the 1km-resolution regional-scale biogeochemistry and sediments model of the Great Barrier Reef (GBR1), forced by version 2.0 of the 1km-resolution hydrodynamic model and with Furnas relationships for wet and dry tropics rivers as catchment inputs.

This model configuration and associated results dataset may be referred to as "GBR1_H2p0_B3p2_Cfur_Dnrt" according to the eReefs biogeochemical simulation naming protocol.

The model ran in near-real-time mode, updating daily, until January 2024 when the 2023/24 monsoon season caused damage to sensors in the catchments, and we lost access to the critical river-flow forcing dataset.

Organization: Australian Ocean Data Network
Late Cretaceous-Palaeogene nannofossil biostratigraphy of Challenger No. 1 well (Challenger Formation type section), offshore Perth Basin, Western Australia

Late Cretaceous-Palaeogene calcareous nannofossil assemblages from the mainly carbonate section in Challenger No. 1 well, above the 780m level, have some similarities with the recently described succession of carbonates in the Perth Canyon, south Perth Basin. The continuity of the marine Palaeogene in these two sections contrasts with the single marine unit (the hemipelagic Kings Park Formation) known in the onshore Perth Basin. In both offshore sections, it is impracticable to subdivide the Palaeogene carbonates into mappable lithostratigraphic units, and identification of known Paleocene and Eocene hemipelagic rock units is evidently not possible although their age equivalents (or partial equivalents) can be detected biostratigraphically.  Marine Oligocene sediments, recently identified (for the first time in the Perth Basin) in the Perth Canyon, are shown to occur in Challenger No. 1. The age of the type section of the Challenger Formation is revised (from Late Eocene) to Middle Eocene-Oligocene. Sediments immediately underlying the type Challenger Formation in Challenger No. 1 are Middle Eocene in age, and consequently are not the Kings Park Formation as previously reported. They probably equate with the basal type section of the hemipelagic Porpoise Bay Formation, suggesting a possibly significant age overlap between the type sections of the Challenger and Porpoise Bay Formations; the latter is probably a more terrigenous facies of part of the former. Lower Eocene beds similar to those discovered recently in the Perth Canyon also occur in Challenger No. 1. The Late Cretaceous assemblages identified in Challenger No. 1 are probably representatives of both the upper Campanian Lancelin beds (lower part) and the upper Santonian-lower Campanian Gingin Chalk.  Three major disconformities (or condensed sections) are detected in Challenger No. 1: at the Eocene/Oligocene boundary (lowermost Oligocene is missing) within the upper part of the Challenger Formation; at the Cretaceousrrertiary  boundary (Maastrichtian and Lower Paleocene are missing), and within the Campanian section. The Late Cretaceous-Palaeogene section in Challenger No. 1 is more complete than coeval sections at nearby Deep Sea Drilling Project sites in the Perth Abyssal Plain and on the Naturaliste Plateau.

Tags: Earth Sciences, GA Publication, Journal, Published_External, WA, marine
Organization: Australian Ocean Data Network
Environmental Management of Clastic Coastal Depositional Environments: Inferences from an Australian Geomorphic Database

Simple, conceptual geomorphic models can assist environmental managers in making informed decisions regarding management of the coast at continental and regional scales. This basic information, detected from aerial photographs and/or satellite images, can be used to ascertain the relative significance of several common environmental issues, including: sediment trapping efficiency, turbidity, water circulation, and habitat change due to sedimentation for different types of clastic coastal depositional environments.

Tags: AU-EEZ, Earth Sciences, External Publication, Published_External, Scientific Journal Paper, marine
Organization: Australian Ocean Data Network
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 MV 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: Australian Ocean Data Network
Stratigraphy and palynology of Mesozoic sediments from the Great Australian Bight area, southern Australia

The offshore Mesozoic Bight and Duntroon Basins formed through rifting and separation of the Australian and Antarctic plates.  Palynological investigation of samples dredged from the continental slope and submarine canyon walls in these basins during BMR Rig Seismic Cruise 66 showed that the bulk of the palynofloras correlate with the Maastrichtian to possibly earliest Paleocene Forcipites (al. Tricolpites) longus spore/pollen Zone and the Manumiella druggii microplankton Zone.  The zones are characteristic of the upper Potoroo Formation, thus this part of the Formation is widespread in the Bight and Duntroon Basins.  Environments of deposition ranged from paralic to marine.  Two samples from each of the Bight and western Duntroon Basins contain palynofloras ranging in age from Santonian to Maastrichtian, indicating a lower Potoroo/Wigunda Formation source, and one sample from the Duntroon Basin with an Early Cretaceous palynoflora points to a Ceduna Formation source.  Recycled Permian, Neocomian-Aptian and Albian-Cenomanian palynomorphs are common in the Potoroo and Wigunda Formations.  These imply the provenance of the Maastrichtian sequences was via streams flowing from the east and north into the Great Australian Bight area.  Palynological evidence indicates that lowland temperate rainforests were widespread on the Australian side of the rift at least during the Campanian-Maastrichtian.

Tags: Earth Sciences, GA Publication, Journal, Published_External, SA, WA
Organization: Australian Ocean Data Network
Geology of the Proterozoic Davenport province, central Australia

The Davenport province, situated between the Proterozoic Tennant Creek Au-Cu- Bi metalliferous province and Arunta Inlier, consists of sedimentary, volcanic and intrusive rocks which are overlapped by flat-lying Palaeozoic sediments of the Georgina and Wiso Basins. The oldest rocks seen are turbiditic sediments and subordinate chert and felsic volcanics of the 1870 Ma-old Warramunga Group. This group, which is exposed only in the north, was folded, weakly metamorphosed, intruded by granite, and eroded before being overlain by the Hatches Creek Group, the main component of the Davenport province. The Hatches Creek Group is a folded sedimentary and bimodal volcanic sequence, at least 10 km thick, comprising three subgroups, twenty formations, and two named members; felsic volcanics in the oldest subgroup were probably erupted 1810-1820 Ma ago. The group is correlated with part of the Tomkinson Creek beds north of Tennant Creek and probably with Division 3 of the Arunta Inlier. The sedimentary rocks include quartz-rich to lithic and feldspathic sandstone, conglomerate, siltstone, finer-grained rocks, and minor carbonates, some of which are stromatolitic. Environments were mainly fluvial (alluvial fan, braided stream, meandering stream) in the lower part of the group and shallow marine (including tidal) in the middle and upper parts. Felsic and mafic volcanism, comagmatic sill emplacement, and probably faulting accompanied sedimentation, which kept pace with subsidence. An extensional ensialic tectonic setting is envisaged. The sequence was deformed, regionally metamorphosed to mainly greenschist facies, and subsequently intruded by 1660 Ma-old granite. The deformation was of thick-skinned type, and involved two episodes of tight, upright, concentric folding. Chemically, the felsic volcanics of the Hatches Creek Group differ from those of the Warramunga Group (which resemble the 1865 Ma-old Leichhardt Volcanics in the Mount Isa Inlier) in having higher contents of Ti, P, Th, U and especially Zr, Nb and Y, and lower Ca, AI, Sr and V. The mafic volcanics of the Hatches Creek Group are continental tholeiites. Geophysical data show that the younger granites of the province correspond to marked gravity lows; that units within the Hatches Creek Group can be traced in the subsurface using contoured aeromagnetics; and that the felsic igneous rocks are moderately radioactive. Mineralisation is largely restricted to the lower part of the Hatches Creek Group, where there are quartz veins with wolframite and scheelite probably related to granite intrusions, and auriferous quartz veins that may have formed during regional metamorphism. Total recorded production amounts to about 4500 t tungsten concentrates, mainly from the Hatches Creek and Wauchope tungsten fields, and 15 kg gold. Small quantities of copper, silver-lead, bismuth, and uranium have also been mined.

Tags: AU-NT, Bulletin, Earth Sciences, GA Publication, Published_External, geology
Organization: Australian Ocean Data Network
Assessment of Tropical Cyclone Risk in the Pacific Region: Analysis of Changes to Key Tropical Cyclone Parameters

The Assessment of Tropical Cyclone Risks in the Pacific Region project represents a collaboration between DIICCSRTE and Geoscience Australia with PCRAFI and AIR Worldwide. Building on the expertise of each organisation, the project will deliver an assessment of the financial risks to buildings, infrastructure and agriculture arising from tropical cyclones (TCs) under current and future climate regimes. This extends previous risk assessments undertaken by incorporating the influence of climate change on the hazard (TCs) into the assessment process. The output of this study is a set of peril matrices, which detail the relative change in parameters describing TC behaviour: e.g. annual mean frequency, mean maximum intensity and mean latitude of genesis. The relative changes are evaluated as the fractional change between TC behavior in current climate GCM simulations and future climate GCM simulations.

Tags: GA Publication, Hazard Response, Natural Hazards, Pacific Nations, Published_External, Record, Tropical Cylone
Organization: Australian Ocean Data Network
First record of Tethyan palynomorphs from the Late Triassic of East Antarctica

A well-preserved Late Triassic palynoflora from the upper Flagstone Bench Formation, Prince Charles Mountains, East Antarctica, contains taxa that are also widely distributed in coeval Tethyan Laurasian assemblages. The most common and distinctive of these elements in the present assemblage are: Enzonalasporites vigens, E. densus, cf. Ellipsovelatisporites sp., Minutosaccus crenulatus, cf. Rimaesporites aquilonalis, Ovalipollis ovalis, Samaropollenites speciosus, and Duplicisporites scurrilis. The assemblage is assigned to the Australian Minutosaccus crenulatus Zone, and considered to be of Norian age. Gondwanan palynofloras containing these Laurasian elements are assigned to the Onslow Microflora, which is represented by Middle and Late Triassic palynomorph assemblages from Madagascar, western and northern Australia, East Africa, and Peninsular India. Occurrences of the Onslow Microflora appear to be confined to sediments deposited in palaeolatitudes between about 40o-30oS. As well as climatic controls, we suggest that other factors influenced the distribution of the parent floral communities. In particular, availability of migration pathways along Tethyan coastal plains, that were exposed during periods of sealevel regression, was an important factor controlling the rapid dispersal of certain Triassic plants.  Marine influence on the present assemblage is evident by the rare spinose acritarchs, and one specimen of a dinocyst of the Shublikodinium-Rhaetogonyaulax plexus; this is the first record of a Triassic dinocyst from Antarctica.

Tags: AAT, Earth Sciences, GA Publication, Journal, Published_External
Organization: Australian Ocean Data Network