Resistivity Model Derived from Magnetotelluric Data in the Curnamona and Delamerian Region

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.We present a 3-D resistivity model derived from magnetotelluric data collected by two recent surveys in the Curnamona and Delamerian Region: the Curnamona Cube survey led by the University of Adelaide and funded by AuScope and the Curnamona Cube Extension survey (https://doi.org/10.26186/147904) by Geoscience Australia as part of Exploring for the Future Program. In total, data from 231 sites were used to produce 3-D models using the ModEM code. Details of data inversion are provided in the Readme.pdf file. The resistivity model can be used to enhance the understanding of the geodynamics and mineral potential in the Curnamona Province and Delamerian Orogen.We greatly appreciate that Prof. Graham Heinson from the University of Adelaide has made the Curnamona Cube survey data available for this work. The modelling work was undertaken with the assistance of resources from the National Computational Infrastructure (NCI Australia).This release package contains the preferred 3-D resistivity model in SGrid format and geo-referenced depth slices in .tif format.

澳大利亚地质科学局（Geoscience Australia）的“未来勘探”（Exploring for the Future）项目提供非竞争性地质科学信息，为政府、社区与行业开展澳大利亚矿产、能源及地下水资源可持续开发的决策提供支撑。通过收集、分析与解读全新及现有的非竞争性地质科学数据与知识，我们正构建全国性的澳大利亚地质与资源潜力图景。这将助力打造强劲经济、韧性社会与可持续环境，惠及全体澳大利亚民众，其中包括支撑澳大利亚向净零排放转型，推动强劲且可持续的资源与农业产业发展，同时为澳大利亚区域与偏远社区创造经济机遇与社会福祉。“未来勘探”项目始于2016年，是澳大利亚政府投入2.25亿澳元、为期8年的投资项目。

本次发布的三维电阻率模型，源自近期在库纳莫纳（Curnamona）与德拉梅里安（Delamerian）地区开展的两项大地电磁（magnetotelluric）调查所采集的数据：一项是由阿德莱德大学主导、澳大利亚地球科学设施（AuScope）资助的库纳莫纳立方体（Curnamona Cube）调查，另一项是澳大利亚地质科学局作为“未来勘探”项目组成部分开展的库纳莫纳立方体扩展调查（https://doi.org/10.26186/147904）。研究总计采用231个测点的数据，通过ModEM代码构建三维电阻率模型。数据反演的详细信息可参见Readme.pdf文件。该电阻率模型可用于深化对库纳莫纳省及德拉梅里安造山带的地球动力学与矿产潜力的认知。

我们衷心感谢阿德莱德大学的格雷厄姆·海因森（Graham Heinson）教授为本项工作提供库纳莫纳立方体调查的数据。本次建模工作依托澳大利亚国家计算基础设施（NCI Australia）的资源完成。

本次发布的数据包包含SGrid格式的优选三维电阻率模型，以及.tif格式的地理参考深度切片。