AusAEM Year 1 NT/QLD: TEMPEST® airborne electromagnetic data and Em Flow® conductivity estimates

The AusAEM Year 1 NT/QLD Airborne Electromagnetic Survey covers the Newcastle Waters and Alice Springs 1:1 Million map sheets in the Northern Territory and the Normanton and Cloncurry 1:1 Million map sheets in Queensland. CGG Aviation (Australia) Pty. Ltd. flew the 67,700-line kilometre survey between 2017 and 2018 using the TEMPEST® airborne electromagnetic system. Flown at 20-kilometre line spacing, data were acquired and processed under contract to Geoscience Australia.

This data package supersedes and replaces two earlier releases: June 11, 2018, and December 2018 (eCatID 120948) with revised calibrations and processing. Along with the regionally spaced (20 km) flight lines, it now includes 1,500 line kilometres of infill flying that was funded by private exploration companies and not previously released in view of time-bounded confidentiality agreements. The survey was commissioned by Geoscience Australia as part of the Exploring for the Future (EFTF) program. The EFTF program is led by Geoscience Australia (GA), in collaboration with the Geological Surveys of the Northern Territory, Queensland, South Australia and Western Australia, and is investigating the potential mineral, energy and groundwater resources in northern Australia and South Australia. The EFTF is a four-year $100.5 million investment by the Australian Government in driving the next generation of resource discoveries in northern Australia, boosting economic development across this region. This Data Release (Phase 1) Package contains the final survey deliverables produced by the contractor CGG, including:
a) The operations and processing report.
b) Final processed electromagnetic, magnetic and elevation point located line data.
c) Final processed electromagnetic, magnetic and elevation grids.
d) Conductivity estimates generated by the EM Flow® conductivity depth-imaging algorithm.
e) Graphical multi-plots of line data and EM Flow® conductivity sections.
f) Graphical stacked EM Flow® conductivity sections.
g) ESRI shape-files containing the flight line locations.

An updated release package (Phase 2), which contains results from our in-house inversion of the EM data (from this Phase 1 release), which includes the regional and infill areas are downloadable from the link provided in the Downloads tab.

澳大利亚航空电磁测量（AusAEM）第一年北领地/昆士兰州项目覆盖北领地的纽卡斯尔沃特斯与艾利斯斯普林斯1:100万比例尺图幅，以及昆士兰州的诺曼顿与克隆库里1:100万比例尺图幅。CGG航空（澳大利亚）私人有限公司（CGG Aviation (Australia) Pty. Ltd.）于2017至2018年间，采用TEMPEST®航空电磁系统完成了总长67700线千米的测量飞行。本次测量采用20千米的测线间距，数据由澳大利亚地质科学局（Geoscience Australia）委托采集并处理。
本数据集包取代了2018年6月11日及2018年12月发布的两个旧版本（eCatID：120948），本次发布采用了经过修订的校准与处理流程。除间距20千米的区域测线外，本数据集还包含1500线千米的加密测线数据——该部分测线由私人勘探公司资助，因受时效性保密协议约束此前未对外发布。本测量项目由澳大利亚地质科学局委托开展，隶属于“未来勘探（Exploring for the Future, EFTF）”计划。EFTF计划由澳大利亚地质科学局（GA）牵头，联合北领地、昆士兰州、南澳大利亚州与西澳大利亚州的地质调查局共同实施，旨在勘查澳大利亚北部及南澳大利亚州的矿产、能源与地下水资源潜力。EFTF计划是澳大利亚政府投入1.005亿澳元实施的四年期项目，旨在推动澳大利亚北部新一代矿产资源发现，助力该区域经济发展。
本次发布的第一阶段数据集包包含承包商CGG产出的最终测量交付成果，具体包括：
a) 测量作业与处理报告；
b) 最终处理后的电磁、磁测与高程点位测线数据；
c) 最终处理后的电磁、磁测与高程栅格数据；
d) 由EM Flow®电导率深度成像算法生成的电导率估算结果；
e) 测线数据与EM Flow®电导率剖面的图形多图；
f) 堆叠式EM Flow®电导率剖面图形；
g) 包含测线位置信息的ESRI形状文件（ESRI shape-files）。
第二阶段更新数据集包包含基于本第一阶段发布数据（覆盖区域测线与加密测区）的电磁数据内部反演结果，可通过“下载”标签页中的链接获取。