AndreaBozzo/ceres-open-data-index huggingface dataset:
BMR Cruise 107: Seabed Morphology and Offshore Resources around Christmas Island, Indian Ocean

The Australian Territory of Christmas Island, a raised atoll with a population of about 2000 people, lies on oceanic crust about 1600 km north- north west of Australia's Northwest Cape, and 350 km south of western most Java (Fig. 1). The Australian Cocos-Keeling Islands group is 1000 km further west. Christmas Island resembles a 'T', with its stem running east-west (Fig. 4), has an area of 140 km2, and is up to 20 km across. Australia has declared a 200 mile fisheries zone around Christmas Island. The island is on the Indo-Australian Plate, which is moving 'north at about 7cm/year, and is being uplifted on the bulge in front of the Java Trench 150km to the north. It has the form of a plateau at 200-300 m above sea level,bounded by a series of sea cliffs and terraces. The plateau slopes to the south; the highest point is Murray's Hill (361 m) on the western end of the island. The natural vegetation is tropical rain forest. The island is at the eastern end of the submarine Christmas Rise, which extends south-south west for 700 km (Fig. 1). The Java Trench to the north is more than 6500 m deep, and the abyssal plains around the Christmas Rise are 5000-6000 m deep. The rise sits on oceanic crust of presumed LateCretaceous age, and both it and the pedestal of the island consist largely of volcanics. On the island the volcanics are overlain by Eocene limestone, and an extensive Miocene limestone which is associated with extensive phosphate deposits. These deposits produced nearly 1,000,000 tonnes a year of phosphate rock until 1987 when mining ceased. Mining resumed at asmaller scale in 1991. In early 1991, the Australian Department of Foreign Affairs and Trade requested BMR to undertake a study of the non-living seabed resources of the area around Christmas Island, as an aid to seabed boundary delimitation negotiations. This work arose from the request, and started in January 1992, using RV. Rig Seismic. A cruise narrative is provided in Appendix 7

Tags: CX, Earth Sciences, GA Publication, Published_External, Record, marine
Organization: Australian Ocean Data Network
Geology and offshore petroleum prospects of the eastern New Ireland Basin, northeastern Papua New Guinea

The eastern part of the New Ireland Basin of Papua New Guinea is about 600 km long by 150 km wide and mostly offshore, northeast of New Hanover and New Ireland. Basin geology and petroleum prospects have been interpreted from onshore geology integrated with offshore seismic reflection data and limited geological sampling. Most of the basin is a structurally simple downwarp that formed as a fore-arc basin between an Eocene-early Miocene volcanic arc in the southwest and an outer-arc high in the northeast. The basin contains up to 5 km of strata interpreted as early Miocene and possibly Oligocene volcaniclastics, early- late Miocene shelf carbonates, late Miocene and Pliocene bathyal chalk s and volcaniclastics, and Pleistocene-Recent sediments ranging from terrestrial conglomerates to hemipelagic oozes. In the east, Plio-Pleistocene volcanism has formed islands and greatly disturbed the older strata. Petroleum prospects offshore appear to be moderate.  Early-late Miocene clastic and carbonate source rocks are thought to be present, and presumed reefal bodies may form traps within a thick and deeply buried early-late Miocene platform carbonate sequence, similar to the widespread Lelet Limestone exposed on New Ireland.

Tags: Earth Sciences, GA Publication, Journal, PNG, Published_External, marine
Organization: Australian Ocean Data Network
Aquafin CRC Salmon Project - Monthly Monitoring 2 - D'Entrecasteaux Channel and Huon Estuary - Sept 2004 - Oct 2005

The Aquafin CRC Salmon Project is being undertaken by CSIRO Marine and Atmospheric Research (CMAR) and Tasmanian Aquaculture and Fisheries Institute (TAFI). Monthly monitoring 2 (MM2) was undertaken in the Huon River and D Entrecasteaux Channel from 20 September 2004 until 19 October 2005, except that there was no sampling in May or July 2005. During MM2 samples were collected monthly from 11 sites for the analysis of nutrients, phytoplankton species identification, chlorophyll and carotenoid pigments and turbidity; samples were collected approximately every second month from 3-4 sites for dissolved oxygen (TAFI). Two depths were sampled (0 and 1 m from the bottom) for the nutrient analyses, dissolved oxygen and spectrophotometric chlorophyll (TAFI) and two depths were sampled for turbidity (1m and 5m). A 12 m integrated water column sample was collected for the CMAR HPLC pigment analysis and phytoplankton species identification. At each site prior to the collection of the samples a CTD profile to near bottom was collected using the SBE19-4550 and the Secchi depth measured. PLEASE NOTE - The phytoplankton results were updated in June 2012 with a correction. The original biovolume unit in column L and M was incorrect and should have been µL/L. The values in column M and L have been divided by 1000 and the unit mL/L left unchanged. Other values are not affected including CPL and Group CPL.

Organization: Australian Ocean Data Network
Second AGSO Petroleum Group Seminar, 17-18-19 November 1993 : Key Abstracts

REGIONAL DEEP SEISMIC of the NORTH WEST SHELF
by the AGSO North West Shelf Study Group (J.B. Colwell,N.F. Exon, P.J. Hill, G.W. O'Brien, C.J. Pigram, D.C. Ramsay, H.M.J. Stagg, H.I.M. Stracktneyer, P.A. Symonds, J.B. Wilcox)

PRE-JURASSIC RIFT ARCHITECTURE AND TECTONIC DEVELOPMENT, TIMOR SEA/ASHMORE
CARTIER REGION
by G.W. O'Brien, J.B. Wilcox, S. Baldwin, C.J. Pigram, M. Morsel &amp; J. Ostby

TECTONIC EVOLUTION OF THE BASS STRAIT REGION, AND ITS IMPLICATIONS FOR PETROLEUM POTENTIAL
by J. B. Wilcox &amp; J. Colwell THE OTWAY BASIN - A COMPLEX PASSIVE MARGIN IN SOUTHEASTERN AUSTRALIA
by D. M. Finlayson, G. W. O'Brien and C. V. Reeves

PHILIPPINE MARINE SEISMIC SURVEY PROJECT^10
by Chao-Shing Lee, Malcolm C. Galloway, Aidan Moore and Andrew Fraser

DEEP WATER PETROLEUM PROSPECTS IN THE^12
LORD HOWE RISE REGION
by P.A. Symonds &amp; J.B. Wilcox
EVOLUTION OF THE CANNING BASIN AND ITS PETROLEUM^14
SYSTEMS: PROGRESS REPORT
by M. J. Jackson, J. Kennard, K.. Romine, P. Southgate, M. Sexton, R. Shaw,
C. Foster, P. Jones, R. Nicoll, G. Young, I. Zeilinger

Tags: Earth Sciences, GA Publication, Published_External, Record, petroleum geology
Organization: Australian Ocean Data Network
Gravity, magnetic and bathymetry grids from levelled data for Southwest Australia : Southwest region

The Australian Geological Survey Organistaion (AGSO) has produced a set of digital bathymetry, gravity and magnetic grids for the southwest quadrant of Australia (24 - 46S, 106-140E), using all available land, marine and satellite data. The work was done in cooperation with Desmond Fitzgerald &amp; Associates (DFA), and with significant bathymetric data input from the Australian Hydrographic Office (AHO). The results were obtained by performing a network adjustment on marine ship-track data, and combining these with onshore and satellite-derived data.

Tags: AU-WA, Earth Sciences, GA Publication, Published_External, Record, bathymetry, geophysics, gravity, magnetics, marine
Organization: Australian Ocean Data Network
Rock Dredging Data from RV Investigator voyage IN2024_T01

This dataset provides an inventory of rock dredge samples collected during the Marine National Facility RV Investigator voyage IN2024_T01. It includes sample identifiers, collection metadata (location and water depth), and detailed macroscopic descriptions of recovered materials, along with links to associated photographic records and sample storage information.

Samples are primarily composed of mafic volcanic lithologies (predominantly porphyritic basalts), with additional manganese nodules and minor sediment (e.g., pelagic ooze). Each sample is described using standard geological attributes including colour, grain size, lithology, mineralogy, phenocryst abundance, groundmass texture, vesicularity, and degree of alteration. Supporting imagery (including high-resolution photographs and thin section data where available) provides visual context for sample characteristics.

This dataset enables discovery and reuse of physical samples by the broader research community by documenting sample availability, characteristics, and storage. Researchers interested in accessing physical samples or obtaining additional information are encouraged to contact the data custodian.

Organization: Australian Ocean Data Network
Recruit survival and growth under different light intensities and light spectra RRAP CAD 1-2

This study investigated how light quality and light intensity affect the survival and growth of coral spat that cooccur with algal communities typically used to induce larval settlement, but which might also outcompete spat and reduce survival during the grow-out period. The experiment used two light spectra, blue and full, at four maximum light intensities ranging from 5 to 160 &micro;mol m&minus;2 s&minus;1. Spat were photographed weekely for 12 weeks. Survival was measured by counting spat over time and growth was measured by tracking the area of individual recruits in the photographs.

Organization: Australian Ocean Data Network
World Bathymetry Base Map WMTS

World Bathymetry Base Map tile cache. The service includes world bathymetry data, and ocean, country, population and natural features. The information was derived from various sources, including Natural Earth and National Geophysical Data Center (NGDC) ETOPO2 Global 2 Elevations from the September 2001 data. The service contains layer scale dependencies.

Tags: Natural Earth, Published_External, WMTS, bathymetry, boundaries, marine, political, topography, web service, world
Organization: Australian Ocean Data Network
Australia's Maritime Jurisdiction in the Coral Sea (South)

Map showing Australia's Maritime Jurisdiction in the southern part of the Coral Sea.
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, treaties 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: Administrative Boundary, Earth Sciences, Published_External, Thematic Map, administrative boundaries, bathymetry, continental shelf, marine, marine jurisdiction
Organization: Australian Ocean Data Network
Quaternary Calcarenite Stratigraphy on Lord Howe Island, Southwestern Pacific Ocean and the Record of Coastal Carbonate Deposition

Lord Howe Island is a small, mid-ocean volcanic and carbonate island in the southwestern Pacific Ocean. Skeletal carbonate eolianite and beach calcarenite on the island are divisible into two formations based on lithostratigraphy. The Searles Point Formation comprises eolianite units bounded by clay-rich paleosols. Pore-filling sparite and microsparite are the dominant cements in these eolianite units, and recrystallised grains are common. Outcrops exhibit karst features such as dolines, caves and subaerially exposed relict speleothems. The Neds Beach Formation overlies the Searles Point Formation and consists of dune and beach units bounded by weakly developed fossil soil horizons. These younger deposits are characterised by grain-contact and meniscus cements, with patchy pore-filling micrite and mirosparite. The calcarenite comprises several disparate successions that contain a record of up to 7 discrete phases of deposition. A chronology is constructed based on U/Th ages of speleothems and corals, TL ages of dune and paleosols, AMS 14C and amino acid racemization (AAR) dating of land snails and AAR whole-rock dating of eolianite. These data indicate dune units and paleosols of the Searles Point Formation were emplaced during oxygen isotope stage (OIS) 7 and earlier in the Middle Pleistocene. Beach units of the Neds Beach Formation were deposited during OIS 5e while dune units were deposited during two major phases, the first coeval with or shortly after the beach units, the second later during OIS 5 (e.g. OIS 5a) when the older dune and beach units were buried.

Large-scale exposures and morphostratigraphical features indicate much of the carbonate was emplaced as transverse and climbing dunes, with the sediment source located seaward of and several metres below the present shoreline. The lateral extent and thickness of the eolianite deposits contrast markedly with the relatively small modern dunes.

Tags: AU-NSW, Earth Sciences, External Publication, Published_External, Scientific Journal Paper, isotopes, marine, stratigraphy
Organization: Australian Ocean Data Network
Geomorphological Evolution of Lord Howe Island and Carbonate Production at the Latitudinal Limit to Reef Growth

Lord Howe Island is a volcanic island, rising to over 800 m, draped with Late Quaternary submarine and subaerial carbonate sediments. The island and neighbouring islets lie within a chain of seamounts and is presently at or close to the latitudinal limit to coral reef growth. Lord Howe Island and adjacent Balls Pyramid, composed of the basalts erupted around 6 million years ago, sit near the middle of broad shelves on separate peaks of one major volcanic edifice. The central part of the Lord Howe Island is covered by calcarenite that was deposited primarily as dunes (eolianite), but with isolated beach units. Uranium-series, amino acid racemisation, and thermoluminescence dating indicate that many of these were deposited during marine oxygen isotope stage 5. Eolianite units stratigraphically below the beach deposits are of penultimate interglacial, or in places perhaps older, age. Different suites of erosional landforms are associated with different lithologies. Towering plunging cliffs characterise the resistant Mount Lidgbird Basalt, in some cases fringed with large talus slopes. On less resistant lithologies or where nearshore topography means greater wave force as a result of waves breaking, there are shore platforms. Slumping cliffs abut broad erosional platforms on the poorly lithified calcarenite. A fringing reef on the western side of Lord Howe Island, the southernmost coral reef in the Pacific, is dominated by coral and coralline algae.Carbonate sediments veneering the shelf around the islands contain a more temperate biota. Located at the southern limit of reef-forming seas, but apparently having undergone erosion for much of its history outside of reef seas, Lord Howe Island provides insights into marine planation of volcanic islands close to what has been termed the Darwin Point.  It represents the initial stages of fringing reef development on a volcanic island.

Tags: AU-NSW, Earth Sciences, External Publication, Published_External, Scientific Journal Paper, marine, marine survey
Organization: Australian Ocean Data Network
The Arrinthrunga Formation: Upper Cambrian epeiric carbonates in the Georgina Basin, central Australia

The Arrinthrunga Formation (Upper Cambrian) in the Georgina Basin, central Australia, is a complex carbonate and mixed carbonate-siliciclastic sequence deposited in an extensive and intermittently emergent epeiric sea. It accumulated on a low-relief substratum in very shallow water with restricted tidal movements; these factors and a warm arid climate contributed to high salinities and the local precipitation of evaporites. Filamentous algae proliferated in the warm hypersaline shallow waters, in which grazing organisms were virtually absent, and exerted a major control on the type and distribution of carbonate lithologies. At the close of the Middle Cambrian a peloid shoal or barrier bar prograded across a broad region of shallow-marine tidal carbonates, bordered in the west by intermittently emergent algal flats. A hypersaline lagoon developed in the lee of the shoal, and a thick sequence of algal-derived peloid lime-muds was deposited. Shoaling sedimentation and intermittent emergence favoured the establishment of gypsiferous algal mats in the northwest, and, with increasing emergence, laminated algal mats colonised much of the area. A transgression of the sea then flushed the stagnant waters, and a reticulate maze of algal bioherms and interbiohermal peloid-ooid sands was established across the whole of the depositional area. Under the influence of shoaling sedimentation and a stable sea level, nearshore environments migrated laterally, and quartz-ooid shoals, intermittently emergent algal mats, and terrigenous sands prograded across the western and central portion of the sea. The progressive shallowing led to local emergence, reduced circulation, and stagnation, so that sections of the sea became isolated and halite evaporite pans were formed. A second transgression of the sea again favoured the widespread growth of algal bioherms, and prograding ooid shoals then spread out across all but the eastern portion of the depositional area. Sedimentation ended as the sea regressed, and a karst erosion surface formed on the emergent landmass.

Tags: AU-NT, AU-QLD, Bulletin, Earth Sciences, GA Publication, Published_External
Organization: Australian Ocean Data Network
Small Angle Neutron Scattering Signature of Oil Generation in Artificially and Naturally Matured Hydrocarbon Source Rocks

We have demonstrated for the first time the application of a small angle neutron scattering (SANS) technique for the precise determination of the onset of hydrocarbon transport (primary migration) in shaly source rocks. We used a sequence of rocks pyrolysed in the laboratory under nitrogen at temperatures in the range 310-370Â°C. These rocks contained several percent of dispersed marine Type II organic matter. Geochemical analysis indicated a peak of the hydrocarbon generation in the middle of the temperature range (at 340Â°C). We observed a sharp decrease of SANS intensity in a narrow maturity range within the geochemically determined region of the onset of hydrocarbon generation. This decrease was a direct consequence of the SANS contrast variation caused by the invasion of the pore space by bitumen during the primary migration of hydrocarbons. A similar phenomenon was observed for a natural maturity sequence of source rocks originating from the same location.

Tags: Earth Sciences, External Publication, Published_External, Scientific Journal Paper, geochemistry, organic geochemistry
Organization: Australian Ocean Data Network
National Gravity Compilation 2019 DGIR image

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 image is produced from the 2019 Australian National Gravity Grids A series. These gravity data were acquired under the project No. 202008. The grid The grid represented in this image has a cell size of 0.00417 degrees (approximately 435m). The data are given in units of um/s^2, also known as 'gravity units', or gu. The %%MV_DATASETS/SURVEY_NAME% 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 image shows de-trended global isostatic residual anomalies (A series) over Australia and its continental margins. This National Gravity Compilation 2019 DGIR image (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.

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, image, isostatic, marine data, raster, residual, satellite data, survey 202008
Organization: Australian Ocean Data Network
RV Investigator Voyage IN2016_T02 Seabird Observations

Seabird and incidental cetacean and seal sightings were recorded during daylight hours during the transit from Hobart to Sydney, May 2016. This voyage was used as a trial of acquiring observations from the RV Investigator observation deck and testing the data recording system.

Observations were made every ten minutes in the forward quadrant.

There were 393 observations from  33 species of birds, 3 cetaceans and one seal. The commonest bird species were Pachyptila turtur, Thalassarche cauta, Sterna bergii and Morus serrator. Each species has been linked where possible to the World Register of Marine Species (WoRMS  https://www.marinespecies.org). The data has been published to the Ocean Biodiversity Information System (OBIS https://obis.org).

Organization: Australian Ocean Data Network
Reforming Planning Processes Trial: Rockhampton 2050: Technical Report on Current and Future Climate Hazards

Potential impacts of climate change present significant challenges for land use planning, emergency management and risk mitigation across Australia. Even in current climate conditions, the Rockhampton Regional Council area is subject to the impacts of natural hazards, such as bushfires, floods, and tropical cyclones (extreme winds and storm surge). All of these hazards may worsen with climate change.

To consider future climate hazard within council practices, the Rockhampton Regional Council received funding from the National Climate Change Adaptation Research Grants Program Project for a project under the Settlements and Infrastructure theme. This funding was provided to evaluate the ability of urban planning principles and practices to accommodate climate change and the uncertainty of climate change impacts. Within this project, the Rockhampton Regional Council engaged Geoscience Australia to undertake the modelling of natural hazards under current and future climate conditions.

Geoscience Australia's work, within the broader project, has utilised natural hazard modelling techniques to develop a series of spatial datasets describing hazards under current climate conditions and a future climate scenario. The following natural hazards were considered: tropical cyclone wind, bushfire, storm tide, coastal erosion and sea-level rise. Outputs of this project include a report, hazard maps and digital spatial data.

Tags: AU-QLD, Earth Sciences, GA Publication, Published_External, Record, climate, geohazards, marine
Organization: Australian Ocean Data Network