The Historical Bushfire Boundaries service represents the aggregation of jurisdictional supplied burnt areas polygons stemming from the early 1900's through to 2022 (excluding the Northern Territory). The burnt area data represents curated jurisdictional owned polygons of both bushfires and prescribed (planned) burns. To ensure the dataset adhered to the nationally approved and agreed data dictionary for fire history Geoscience Australia had to modify some of the attributes presented. The information provided within this service is reflective only of data supplied by participating authoritative agencies and may or may not represent all fire history within a state.

<div>The Abbot Point to Hydrographers Passage bathymetry survey was acquired for the Australian Hydrographic Office (AHO) onboard the RV Escape during the period 6 Oct 2020 – 16 Mar 2021. This was a contracted survey conducted for the Australian Hydrographic Office by iXblue Pty Ltd as part of the Hydroscheme Industry Partnership Program. The survey area encompases a section of Two-Way Route from Abbot Point through Hydrographers Passage QLD. Bathymetry data was acquired using a Kongsberg EM 2040, and processed using QPS QINSy. The dataset was then exported as a 30m resolution, 32 bit floating point GeoTIFF grid of the survey area.</div><div>This dataset is not to be used for navigational purposes.</div>

Australia's Identified Mineral Resources is an annual national assessment that takes a long-term view of Australian mineral resources likely to be available for mining. The assessment also includes evaluations of long-term trends in mineral resources, world rankings, summaries of significant exploration results and brief reviews of mining industry developments.

<div>The South Nicholson National Drilling Initiative (NDI) Carrara 1 stratigraphic drill hole was completed in late 2020, as a collaboration between Geoscience Australia, the Northern Territory Geological Survey (NTGS), and the MinEx CRC. The drilling aimed to gather new subsurface data on the potential mineral and energy resources in the newly identified Carrara Sub-basin. NDI Carrara 1 is located in the eastern Northern Territory, on the western flanks of the Carrara Sub-basin on the South Nicholson Seismic line, reaching a total depth of 1751 m, intersecting ca. 630 m of Cambrian Georgina Basin overlying ca. 1100 m of Proterozoic carbonates, black shales and minor siliciclastics (https://portal.ga.gov.au/bhcr/minerals/648482).</div><div>&nbsp;</div><div>Following a public data release of the borehole completion report, CSIRO was contracted by Geoscience Australia (GA) under the Exploring for the Future program to analyse samples from NDI Carrara 1 for quantitative bulk and clay fraction analysis. This report presents results for quantitative bulk and clay (<2 µm) fraction analysis by X-ray powder diffraction (XRD) on 32 bulk core samples from the NDI Carrara 1. Samples were prepared and analysed at the CSIRO’s Waite Laboratories in South Australia.</div><div><br></div>

Older unreinforced masonry (URM) buildings have been found to perform poorly in historical Australian earthquakes. Where these building are present in pedestrian precincts, they represent a significant risk to people and communities. Some towns and cities have a significant proportion of this type of building within business districts and Perth CBD is an example having 48% by number of URM construction ranging from pre-Federation to early-to-mid twentieth century in age. Further, these buildings are often of significant heritage value providing a sense of place to residents and contribute to visitor related business revenue. These factors all come to play in the town of York which is also in an area of elevated earthquake hazard. There is a need for information inform strategies and decision making around reducing the risk they represent. This project has had a focus on York and was designed as a three-year collaboration between researchers, industry and local stakeholders to improve the understanding of the vulnerability of older unreinforced masonry (URM) buildings. The building types considered are of the types found in York and other larger communities and the project has included methods of retrofit that can enhance the resilience of these buildings to earthquake hazard. It has further included the promotion of expertise with building design professionals and in the construction industry to undertake this work through a demonstration projects. Specifically, the project has been a collaboration between the Shire of York, the Department of Fire and Emergency Services, the University of Adelaide and Geoscience Australia. While not a direct project partner, the Department of Planning Lands and Heritage (DPLH) has also been a key stakeholder that has sought to facilitate the application for grant funding for the mitigation activity to be studied as part of this project.

<div>This report contains information about the operation of Geoscience Australia’s ten permanent geomagnetic observatories, repeat stations and other relevant information covering the period from 2017 to 2021.</div><div>Information regarding the activities and services of Geoscience Australia’s Geomagnetism program, distribution of geomagnetic data, geomagnetic instrumentation and data processing procedures is also provided.</div><div><br></div>

This Record presents data collected in July–August 2020 as part of the ongoing Northern Territory Geological Survey–Geoscience Australia SHRIMP geochronology project under the National Collaboration Framework agreement and Geoscience Australia's Exploring for the Future Program. New U–Pb SHRIMP zircon geochronological results derived from eight sedimentary samples from the western Amadeus Basin in the Northern Territory are presented herein. Detrital zircon U–Pb ages were determined from four samples of the Winnall Group: three samples of the Liddle Formation and one of the Puna Kura Kura Formation. Zircon U–Pb ages were also determined from two samples of the Pertaoorrta Group (Cleland Sandstone and Tempe Formation), one sample of the Larapinta Group (Stairway Sandstone) and one sample of the Mereenie Sandstone. <b>Bibliographic Reference:</b> Kositcin N, Verdel C, Normington VJ and Simmons JM, 2021. Summary of results. Joint NTGS–GA geochronology project: western Amadeus Basin, July–August 2020. <i>Northern Territory Geological Survey, Record</i> <b>2021-002</b>.

This Record presents data collected in March 2021 as part of the ongoing Northern Territory Geological Survey–Geoscience Australia (NTGS–GA) SHRIMP geochronology project under the National Collaborative Framework (NCF) agreement and Geoscience Australia's Exploring for the Future Program. New U–Pb SHRIMP zircon geochronological results derived from two drillhole samples of igneous and meta-igneous material from basement to the Amadeus Basin in the Northern Territory are presented herein. <b>Bibliographic Reference:</b> Kositcin N, Verdel C and Edgoose CJ, 2022. Summary of results. Joint NTGS–GA geochronology project: Crystalline basement intersected by the Mount Kitty 1 and Magee 1 drillholes south of Alice Springs, March 2021. <i>Northern Territory Geological Survey</i>, <b>Record 2022-002</b>.

This Record presents new Sensitive High Resolution Ion Micro Probe (SHRIMP) U–Pb geochronological results for six drill core samples from the Rover mineral field, an area of prospective Palaeoproterozoic rocks southwest of Tennant Creek that is entirely concealed below younger sedimentary cover rocks. The work is part of an ongoing collaborative effort between Geoscience Australia (GA) and the Northern Territory Geological Survey (NTGS) that aims to better understand the geological evolution and mineral potential of this region. SHRIMP U–Pb detrital zircon results from two samples, a meta-siltstone/mudstone from the Au–Cu–Bi Rover 1 deposit (drillhole WGR1D011; sample BW20PGF090) and a volcaniclastic sandstone from the Explorer 142 prospect (drillhole NR142D001; sample BW20PGF156) gave near identical maximum depositional ages of 1849.1 ± 3.1 Ma and 1848.9 ± 3.0 Ma respectively. The euhedral nature of the zircons in both samples and their unimodal age distributions, support the interpretation that the maximum depositional ages of these samples are good approximations for their true age of deposition. These results are a very close match with U–Pb zircon geochronology of some other drill core samples from the Rover mineral field. Two magmatic rocks from drillhole RVDD0002 (located in the East of the Rover field), gave ages of ca 1851–1850 Ma, while a volcaniclastic sandstone from RVDD0002 gave a maximum depositional age of 1854.0 ± 2.9 Ma (Cross et al 2021). Our new results from drillholes WGR1D011 and NR142D001 confirm the widespread presence of detrital zircons at ca 1854–1849 Ma across much of the Rover mineral field. SHRIMP U–Pb detrital zircon analysis was undertaken on four samples from the base metal Curiosity prospect drillhole, MXCURD002. The first sample analysed GS20PGF058 [520.0–525.7 m], has a maxima at ca 1842 Ma but youngest statistical grouping at 1729 ± 17 Ma (n = 6). This is in stark contrast with a previous sample from this drillhole (GS19DLH0056 [437.63–438.18 m]) that is 82 metres above GS20PGF058, and gave a MDA of 1854.0 ± 2.9 Ma (Cross et al 2021). In an effort to further investigate the ca 1729 Ma date given by GS20PGF058, three further samples were collected from drillhole MXCURD002, one sample below, GS20PGF190 [525.7–531.5 m] and two samples above, GS20PGF085 [515.0–520.0 m] and GS20PGF084 [468.1–473.45 m]. Additionally, samples GS20PGF190 and GS20PGF085 are continuations of the same meta-siltstone/mudstone unit sampled by GS20PGF058. These three samples returned maximum depositional ages of 1851.7 ± 3.9 Ma (GS20PGF085), 1846.6 ± 3.2 Ma (GS20PGF190) and 1841 ± 12 Ma (GS20PGF084). They are also indistinguishable within their uncertainties (MSWD = 0.71, POF = 0.49) and have an average date of ca 1848 Ma. Therefore, the evidence from SHRIMP U–Pb detrital zircon studies of four rocks from drillhole MXCURD002 (this study and that of Cross et al 2021), indicates that the metasedimentary rocks in MXCURD002 were probably deposited at ca 1850 Ma, similar to other metasedimentary units within the Rover mineral field. We suggest that the relatively younger statistical grouping in sample GS20PGF058 at ca 1730 Ma is possibly the result of isotopic re-setting due to a thermal and/or fluid event associated with lead–zinc–copper mineralisation at a similar time which has been recently reported by Farias et al (2022). Although other explanations to explain the ca 1730 Ma grains in this sample such as laboratory contamination or that the zircons have in fact preserved their original crystallisation age, cannot be ruled out. <b>Bibliographic Reference:</b> Cross AJ, Farias PG and Huston DL, 2022. Summary of results. Joint NTGS–GA geochronology project: Rover mineral field, Warramunga Province, July–December 2020. <i>Northern Territory Geological Survey</i>, <b>Record 2022-005</b>.

This Record presents new Sensitive High Resolution Ion Micro Probe (SHRIMP) U–Pb geochronological results for five drill core samples from the Rover mineral field, an area of prospective Palaeoproterozoic rocks southwest of Tennant Creek that is entirely concealed below younger sedimentary cover rocks. The work is part of an ongoing collaborative effort between Geoscience Australia (GA) and the Northern Territory Geological Survey (NTGS) that aims to develop better understanding of the geological evolution and mineral potential of this region. It is being undertaken as part of the Northern Territory Government’s Resourcing the Territory (RTT) initiative and the Federal Government’s Exploring for the Future (EFTF) program and was carried out under the auspices of the National Collaborative Framework (NCF) between GA and NTGS. The rocks studied were sampled from drill cores acquired under the Northern Territory Government’s Geophysics and Drilling Collaborations program; the drillholes sampled comprise RVDD0002 (Wetherley and Elliston 2019), MXCURD002 (Burke 2015) and R27ARD18 (Anderson 2010). <b>Bibliographic Reference:</b> Cross A, Huston D and Farias P, 2021. Summary of results. Joint NTGS–GA geochronology project: Rover mineral field, Warramunga Province, January–June 2020. <i>Northern Territory Geological Survey</i>, <b>Record 2021-003</b>.