Regional magnetic depth estimates for Eastern Resources Corridor (ERC), Officer Basin, Tasmania and Northeast Queensland

As part of the Australia's Resources Framework Project, in the Exploring for the Future Program, Geoscience Australia and CSIRO have undertaken a magnetic source depth study across four areas. These are: 1) the western part of Tasmania that is the southernmost extension of the Darling-Curnamona-Delamerian (DCD) project area; 2) northeastern Queensland; 3) the Officer Basin area of western South Australia and southeastern West Australia; and 4) the 'Eastern Resources Corridor' (ERC) covering eastern South Australia, southwest Queensland, western New South Wales and western Victoria. This study has produced 2005 magnetic estimates of depth to the top of magnetization. The solutions are derived by a consistent methodology (targeted magnetic inversion modelling, or TMIM; also known as ‘sweet-spot’ modelling). The magnetic depth estimates produced as part of this study provide depth constraints in data-poor areas. They help to construct a better understanding of the 3D geometry of the Australian continent, and aid cover thickness modelling activities. A supplementary interpretation data release is also available through Geoscience Australia's enterprise catalogue (ecat) at https://pid.geoscience.gov.au/dataset/ga/149499.Geoscience Australia’s Exploring for the Future program provides precompetitive information to inform decision-making by government, community and industry on the sustainable development of Australia's mineral, energy and groundwater resources. By gathering, analysing and interpreting new and existing precompetitive geoscience data and knowledge, we are building a national picture of Australia’s geology and resource potential. This leads to a strong economy, resilient society and sustainable environment for the benefit of all Australians. This includes supporting Australia’s transition to net zero emissions, strong, sustainable resources and agriculture sectors, and economic opportunities and social benefits for Australia’s regional and remote communities. The Exploring for the Future program, which commenced in 2016, is an eight year, $225m investment by the Australian Government. This work contributes to building a better understanding of the Australian continent, whilst giving the Australian public the tools they need to help them make informed decisions in their areas of interest.

本研究作为澳大利亚资源框架项目的一部分，隶属于“未来勘探（Exploring for the Future）”计划，由澳大利亚地球科学局（Geoscience Australia）与澳大利亚联邦科学与工业研究组织（CSIRO）针对四大区域开展了磁源深度研究。这四大区域分别为：1）塔斯马尼亚州西部，即达令-克纳莫纳-德拉梅里安（Darling-Curnamona-Delamerian, DCD）项目区的最南端延伸区域；2）昆士兰州东北部；3）南澳大利亚州西部及西澳大利亚州东南部的奥弗尔盆地（Officer Basin）区域；4）覆盖南澳大利亚州东部、昆士兰州西南部、新南威尔士州西部及维多利亚州西部的“东部资源走廊（Eastern Resources Corridor, ERC）”。
本研究共生成2005份磁化顶面深度磁法估算结果，所有解均采用统一方法推导得到，即靶向磁反演建模（targeted magnetic inversion modelling, TMIM），也被称为“甜点区”建模。本研究生成的磁法深度估算结果可为数据匮乏区域提供深度约束，有助于深化对澳大利亚大陆三维几何形态的认知，并可辅助盖层厚度建模相关工作。配套的解译数据可通过澳大利亚地球科学局的企业目录（ecat）获取，链接为https://pid.geoscience.gov.au/dataset/ga/149499。
澳大利亚地球科学局的“未来勘探”计划可提供预竞争性信息，为政府、社区及行业在澳大利亚矿产、能源与地下水资源可持续开发方面的决策提供支撑。通过收集、分析与解读新的及现有的预竞争性地球科学数据与相关认知，我们正逐步构建澳大利亚地质与资源潜力的全国性图景，以此助力打造强劲的经济体、韧性的社会与可持续的环境，惠及全体澳大利亚民众。这其中包括助力澳大利亚实现净零排放转型，推动资源与农业部门实现强劲且可持续的发展，并为澳大利亚偏远及乡村社区创造经济机遇与社会福祉。
“未来勘探”计划始于2016年，是澳大利亚政府投入2.25亿澳元开展的为期8年的项目。本项研究工作有助于深化对澳大利亚大陆的认知，同时为澳大利亚民众提供所需的工具，助力其在各自关注的领域做出明智决策。