Thickness of Cenozoic weathering in the Great Artesian Basin

## **Abstract** \n\nThis dataset and its metadata statement were supplied to the Bioregional Assessment Programme by a third party and are presented here as originally supplied.\n\n\n\nThickness of Cenozoic weathering in the Great Artesian Basin. Data is available as isopachs and raster. Isopachs are in Shapefile format. Rasters are in both ESRI grid and ASCII grid formats. This GIS data set was produced for the Great Artesian Basin Water Resource Assessment and used in Figure 3.3 of Ransley TR and Smerdon BD (eds) (2012) Hydrostratigraphy, hydrogeology and system conceptualisation of the Great Artesian Basin. A technical report to the Australian Government from the CSIRO Great Artesian Basin Water Resource Assessment. CSIRO Water for a Healthy Country Flagship, Australia. This dataset and associated metadata can be obtained from www.ga.gov.au, using catalogue number 76539.\n\n## **Dataset History** \n\nSOURCE Thickness data sourced from GABLOG (Habermehl 2001), PIRSA (2007), QDEX (Queensland Department of Natural Resources and Mines, 2012), Gibson et al 1974 and Geoscience Australia's 1:250K Geological Map series (Geoscience Australia, 2010) REFERENCES 1. Geoscience Australia. 2010. 1:250 000 scale Geological Map series - Explanatory Notes (1960-1980). Geoscience Australia, Canberra 2.\tGibson, D. L., B. S. Powell, et al. (1974). Shallow stratigraphic drilling, northern Cape York Peninsula, 1973. Record 1974/76. Australia, Bureau of Mineral Resources. 3.\tHabermehl, M. A. (2001). Wire-line logged water bores in the Great Artesian Basin, Australia - digital data of logs and water bore data acquired by AGSO. Australian Geological Survey Organisation Bulletin 245. Canberra, Bureau of Rural Sciences: ix, 98 p. 4.\tPIRSA (2007). Petroleum and geothermal in South Australia. 19th Edition (DVD). Adelaide, Primary Industries and Resources South Australia, Division of Minerals and Energy Resources. 5.\tQueensland Department of Natural Resources and Mines (2012) "Queensland Digital Exploration Reports (QDEX)". http://mines.industry.qld.gov.au/geoscience/company-exploration-reports.htm METHOD For the western Eromanga Basin, an averaged weathering thickness for each 1:250 000 Sheet area was derived from the explanatory notes or published geological maps. For Central Eromanga Basin, Carpentaria Basin, Laura Basin and Surat Basin, weathering depth were derived from reports contained in descriptive lithological logs from Well Completion Reports. Weathering thicknesses were derived from the QPED stratigraphic database where the logged information reported the alluvium and weathering thickness. Thickness data were imported into ArcGIS as point sets and interpolated to create a surface using the Topo to Raster tool in the ArcGIS Spatial analyst toolset. The raster was clipped to the Great Artesian Basin Water Resource Assessment project boundary - offshore included (Ransley TR and Smerdon BD (eds) (2012) Hydrostratigraphy, hydrogeology and system conceptualisation of the Great Artesian Basin. A technical report to the Australian Government from the CSIRO Great Artesian Basin Water Resource Assessment. CSIRO Water for a Healthy Country Flagship, Australia). Isopachs were generated from the raster, using the Contour tool in the 3d analyst toolset in ArcGIS.\n\n## **Dataset Citation** \n\nGeoscience Australia (2013) Thickness of Cenozoic weathering in the Great Artesian Basin. Bioregional Assessment Source Dataset. Viewed 07 December 2018, http://data.bioregionalassessments.gov.au/dataset/788a990e-77d5-4341-954d-aae72fc3d8b6.

**摘要**

本数据集及其元数据声明由第三方提供给生物区域评估计划（Bioregional Assessment Programme），本文档按原始提交形式呈现。

大自流盆地（Great Artesian Basin）新生代风化层厚度数据。数据包含等厚线图与栅格数据两类：等厚线图采用形状文件（Shapefile）格式存储，栅格数据则同时支持ESRI栅格（ESRI grid）与ASCII栅格（ASCII grid）两种格式。本地理信息系统（GIS）数据集为大自流盆地水资源评估项目制作，被用于Ransley TR与Smerdon BD主编（2012年）的《大自流盆地水文地层学、水文地质与系统概念模型》报告的图3.3；该报告为澳大利亚联邦科学与工业研究组织（CSIRO）大自流盆地水资源评估项目提交给澳大利亚政府的技术报告，由CSIRO健康国家水资源旗舰项目（澳大利亚）发布。本数据集及关联元数据可通过目录编号76539在www.ga.gov.au获取。

**数据集历史**

#### 数据来源
厚度数据源自GABLOG数据库（Habermehl，2001）、PIRSA（2007）、昆士兰州数字勘探报告（QDEX，昆士兰州自然资源与矿产部，2012）、Gibson等人1974年的研究，以及澳大利亚地质调查局1:25万地质图系列（澳大利亚地质调查局，2010）

#### 参考文献
1. 澳大利亚地质调查局. 2010. 1:25万比例尺地质图系列——图说（1960-1980）. 堪培拉：澳大利亚地质调查局
2. Gibson DL, Powell BS, 等. (1974). 1973年约克角半岛北部浅层地层钻探. 1974/76号报告. 澳大利亚矿产资源局
3. Habermehl MA. (2001). 澳大利亚大自流盆地测井水井数据——澳大利亚地质调查局（AGSO）获取的测井与水井数字数据集. 澳大利亚地质调查局公报245. 堪培拉：农村科学局，ix, 98页
4. PIRSA. (2007). 南澳大利亚州石油与地热资源. 第19版（光盘）. 阿德莱德：南澳大利亚州 primary industries and resources 署矿产与能源资源分部
5. 昆士兰州自然资源与矿产部. (2012). "Queensland Digital Exploration Reports (QDEX)". http://mines.industry.qld.gov.au/geoscience/company-exploration-reports.htm

#### 数据制作方法
针对西埃罗曼加盆地，从图说或公开地质图中提取每幅1:25万图幅区域的平均风化层厚度；针对中埃罗曼加盆地、卡奔塔利亚盆地、劳拉盆地与苏拉特盆地，从完井报告的岩性测井描述报告中提取风化深度；对于QPED地层数据库中记录了冲积层与风化厚度的测点，直接提取其风化厚度数据。将厚度数据以点集形式导入ArcGIS，利用ArcGIS空间分析工具集中的"地形转栅格（Topo to Raster）"工具进行插值，生成连续的厚度表面栅格。将生成的栅格数据裁剪至大自流盆地水资源评估项目边界（包含近海区域），该边界定义参见Ransley TR与Smerdon BD主编（2012年）的《大自流盆地水文地层学、水文地质与系统概念模型》报告（澳大利亚联邦科学与工业研究组织大自流盆地水资源评估项目提交给澳大利亚政府的技术报告，CSIRO健康国家水资源旗舰项目，澳大利亚）。最后利用ArcGIS三维分析工具集中的"等值线（Contour）"工具，从栅格数据中生成等厚线图。

**数据集引用**

澳大利亚地质调查局. (2013). 大自流盆地新生代风化层厚度. 生物区域评估源数据集. 2018年12月7日查阅，http://data.bioregionalassessments.gov.au/dataset/788a990e-77d5-4341-954d-aae72fc3d8b6.