Yathong, Forbes, Dubbo, and Coonabarabran, Airborne Electromagnetic Survey Blocks. HELITEM airborne electromagnetic data and GALEI conductivity estimates

Yathong, Forbes, Dubbo, and Coonabarabran Airborne Electromagnetic Survey Blocks.Geoscience Australia (GA), in collaboration with the Geological Survey of New South Wales (GNSW), conducted an airborne electromagnetic (AEM) survey from April to June 2023. The survey spanned from the north-eastern end of the Yathong-Ivanhoe Trough and extended across the Forbes, Dubbo, and Coonabarabran regions of New South Wales. A total of 15, 090-line kilometres of new AEM and magnetic geophysical data were acquired. This survey was entirely funded by GSNSW and GA managed acquisition, quality control, processing, modelling, and inversion of the AEM data.The survey was flown by Xcalibur Aviation (Australia) Pty Ltd using a 6.25 Hz HELITEM® AEM system. The survey blocks were flown at 2500-metre nominal line spacings, with variations down to 100 metres in the Coonabarabran block. It was flown following East-West line directions. Xcalibur also processed the acquired data. This data package includes the acquisition and processing report, the final processed AEM data, and the results of the contractor's conductivity-depth estimates. The data package also contains the results and derived products from a 1D inversion by Geoscience Australia with its own inversion software.The survey will be incorporated and become part of the national AusAEM airborne electromagnetic acquisition program, which aims to provide geophysical information to support investigations of the regional geology and groundwater.The data release package contains:1.    A data release package summary PDF document2.    The survey logistics and processing report and HELITEM® system specification files3.    Final processed point located line data in ASEG-GDF2 format for the five areas    -final processed dB/dt electromagnetic, magnetic and elevation data    -final processed B field electromagnetic, magnetic and elevation data    Conductivity estimates generated by Xcalibur’s inversion     -point located conductivity-depth line data output from the inversion in ASEG-GDF2 format    -graphical (PDF) multiplot conductivity stacks and section profiles for each flight line    -graphical (PNG) conductivity sections for each line    -grids generated from the Xcalibur’s inversion in ER Mapper® format (layer conductivities slices, DTM, X & Z component for each of the 25 channels, time constants, TMI)4.    ESRI shape and KML (Google Earth) files for the flight lines and boundary5.    Conductivity estimates generated by Geoscience Australia's inversion     -point located line data output from the inversion in ASEG-GDF2 format    -graphical (pdf) multiplot conductivity sections for each line    -georeferenced (PNG) conductivity sections (suitable for pseudo-3D display in a 2D GIS)    -GoCAD™ S-Grid 3D objects (suitable for various 3D packages)    -Curtain image conductivity sections in log & liner colour stretch (suitable 3D display in GA’s EarthSci)Directory structure├── 01_Report├── 02_XCalibur_delivered│   ├── * survey_block_Name│         ├── cdi│         │    ├── sections│         │    └── stacks│         ├── grids│         │    ├── cnd│         │    ├── dtm│         │    ├── emxbf│         │    ├── emxdb│         │    ├── emxff│         │    ├── emxzbf│         │    ├── emzdb│         │    ├── time_constant│         │    └── tmi│          ├── located_data│         ├── maps│     └── waveform│              ├── 03_Shape&kml└── 04_GA_Layer_Earth_inversion     ├── * survey_block_Name         ├── GA_georef_sections         │    ├── linear-stretch         │    └── log-stretch         ├── GA_Inverted_conductivity_models         ├── GA_multiplots         └── GA_sgrids Final Processed point located line data is available on request from [e-mail] - Quote eCat# 149118

亚松（Yathong）、福布斯（Forbes）、达博（Dubbo）和库纳巴拉布兰（Coonabarabran）航空电磁测量区块。澳大利亚地质调查局（Geoscience Australia, GA）与新南威尔士州地质调查局（Geological Survey of New South Wales, GNSW）合作，于2023年4月至6月开展了航空电磁（airborne electromagnetic, AEM）测量。本次测量覆盖亚松-艾凡霍槽（Yathong-Ivanhoe Trough）东北端，延伸至新南威尔士州的福布斯、达博与库纳巴拉布兰地区，共获取15090测线公里的新型航空电磁与磁法地球物理数据。本项目由GNSW全额资助，GA负责航空电磁数据的采集、质量控制、处理、建模与反演工作。

测量由澳大利亚Xcalibur航空私人有限公司（Xcalibur Aviation (Australia) Pty Ltd）使用6.25 Hz的HELITEM®航空电磁系统执行，测量区块采用2500米的标称测线间距，库纳巴拉布兰区块测线间距可缩减至100米，飞行方向为东西向。Xcalibur同时负责了采集数据的处理工作。

本数据包包含采集与处理报告、最终处理后的航空电磁数据，以及承包商的电导率-深度估算结果。此外，数据包还涵盖澳大利亚地质调查局使用自研反演软件开展的一维反演结果及其衍生产品。本测量项目将被纳入澳大利亚国家航空电磁采集计划（AusAEM airborne electromagnetic acquisition program），该计划旨在提供地球物理数据以支撑区域地质与地下水调查研究。

本次数据发布包包含以下内容：
1. 数据发布包摘要PDF文档
2. 测量后勤与处理报告，以及HELITEM®系统规格文件
3. 五个区域的最终处理后点位定位测线数据（ASEG-GDF2格式）：
- 最终处理后的dB/dt电磁、磁法与高程数据
- 最终处理后的B场电磁、磁法与高程数据
Xcalibur反演生成的电导率估算结果：
- 反演输出的点位定位电导率-深度测线数据（ASEG-GDF2格式）
- 每条飞行测线的图形化（PDF格式）电导率堆叠多图与剖面
- 每条测线的图形化（PNG格式）电导率剖面
- Xcalibur反演生成的栅格数据（ER Mapper®格式，包含各25个通道的层电导率切片、数字地形模型、X与Z分量、时间常数、总磁异常TMI）
4. 飞行测线与边界的ESRI形状文件与KML（Google Earth）文件
5. 澳大利亚地质调查局反演生成的电导率估算结果：
- 反演输出的点位定位测线数据（ASEG-GDF2格式）
- 每条测线的图形化（PDF格式）电导率剖面多图
- 地理配准（PNG格式）电导率剖面（适用于2D GIS中的伪3D展示）
- GoCAD™ S-Grid三维对象（适用于各类三维软件）
- 对数与线性色彩拉伸的幕式图像电导率剖面（适用于GA的EarthSci软件中的三维展示）

目录结构：
├── 01_Report
├── 02_XCalibur_delivered
│ ├── * survey_block_Name
│ │ ├── cdi
│ │ │ ├── sections
│ │ │ └── stacks
│ │ ├── grids
│ │ │ ├── cnd
│ │ │ ├── dtm
│ │ │ ├── emxbf
│ │ │ ├── emxdb
│ │ │ ├── emxff
│ │ │ ├── emxzbf
│ │ │ ├── emzdb
│ │ │ ├── time_constant
│ │ │ └── tmi
│ │ ├── located_data
│ │ ├── maps
│ │ └── waveform
│ │ ├── 03_Shape&kml
└── 04_GA_Layer_Earth_inversion
├── * survey_block_Name
│ ├── GA_georef_sections
│ │ ├── linear-stretch
│ │ └── log-stretch
│ ├── GA_Inverted_conductivity_models
│ ├── GA_multiplots
│ └── GA_sgrids

最终处理后的点位定位测线数据可通过[e-mail]申请获取，请引用eCat编号149118。