Geological models for base and thickness of Carpentaria Basin derived from interpreted drillhole data for the Beetaloo GBA region

\n## **Abstract** \nThe dataset was compiled by the Geological and Bioregional Assessment Program from source data referenced within the dataset and/or metadata. Drillhole data was used to estimate the depth and thickness of the Carpentaria Basin where it overlies the Beetaloo GBA region. They were also used determine the occurrence of sand rich layers in the Carpentaria Basin. Models derived from drilhole data represent thickness and extent of Carpentaria basin sequence and overlying Cenozoic (when present). See Factsheet 6 for a comparison between AEM and drillhole data derived geological models for the Carpentaria and its implications for recharge potential. Fact sheets are available from https://www.bioregionalassessments.gov.au/gba.\n\n\n## **Attribution** \nGeological and Bioregional Assessment Program\n\n\n## **History** \nThe geological surface models were created by inteporlating point depth estimates from drillhole data using ArcGIS. Models derived from drillhole data represent the whole thickness of the Carpentaria basin sequence and overlying Cenozoic (when present). See fact sheet 5 for a comparison between AEM and drillhole data derived geological models for the Carpentaria and its implications for recharge potential. This grid was interpolated using the Natural Neighbour method.

## **摘要**
本数据集由地质与生物区域评估计划（Geological and Bioregional Assessment Program）基于数据集内部及/或元数据中引用的源数据编制而成。钻孔数据被用于估算覆盖于比塔罗奥GBA（Beetaloo GBA）区域之上的卡奔塔利亚盆地（Carpentaria Basin）的埋深与厚度，同时该数据也被用于确定卡奔塔利亚盆地内富砂层的赋存情况。基于钻孔数据构建的模型可反映卡奔塔利亚盆地层序及其上覆新生代（若存在）地层的厚度与分布范围。详情请参阅情况说明书6（Factsheet 6），以了解针对卡奔塔利亚盆地的航空电磁法（Airborne Electromagnetic, AEM）与钻孔数据衍生地质模型之间的对比结果，及其对补给潜力的指示意义。所有情况说明书均可从https://www.bioregionalassessments.gov.au/gba获取。

## **归属说明**
地质与生物区域评估计划（Geological and Bioregional Assessment Program）

## **历史沿革**
本地质表面模型通过使用ArcGIS对钻孔数据的点深度估算值进行插值构建而成。基于钻孔数据构建的模型可反映卡奔塔利亚盆地层序及其上覆新生代（若存在）地层的总厚度。详情请参阅情况说明书5（Fact Sheet 5），以了解针对卡奔塔利亚盆地的航空电磁法（AEM）与钻孔数据衍生地质模型之间的对比结果，及其对补给潜力的指示意义。本次网格插值采用自然邻域法（Natural Neighbour method）完成。