Report on Cockburn Sound Field Survey March 2004: Coastal Water Habitat Mapping Project - Coastal Geomorphology and Classification Subproject Milestone Report CG3-02

This report describes the field survey carried out in Cockburn Sound, Western Australia by Geoscience Australia (GA) staff for the Coastal Geomorphology and Classification Subproject (CG) of the Coastal Water Habitat Mapping Project (CWHM). It documents the various sampling techniques and procedures used to collect surface and subsurface samples from the Sound; details of the vibracores and grab samples recovered and the proposed analyses to be performed on these samples.

The results of the analysis of the grab samples will be used to classify the various surface sediment types encountered as well as map their distribution within Cockburn Sound. The analysis and interpretation of the vibracores will allow the reconstruction of the stratigraphic framework of Cockburn Sound. This information will be used in conjunction with the findings of the other subprojects in the CWHM Project. For example, it will assist in ground-truthing the results of the both the single and multi-beam sonar surveys that have and are to be carried out within Cockburn Sound by Curtin University. It will also provide key substrate information for incorporation into a more comprehensive benthic habitat classification for the sound.

本报告详述了澳大利亚地球科学局（Geoscience Australia, GA）工作人员于西澳大利亚州科伯恩湾（Cockburn Sound）开展的野外调查工作，该调查隶属于海岸水栖息地制图项目（Coastal Water Habitat Mapping Project, CWHM）下属的海岸地貌与分类子项目（Coastal Geomorphology and Classification Subproject, CG）。报告记录了用于采集该海湾表层与次表层样品的各类采样技术与操作流程，详述了所获取的振动岩芯（vibracores）与抓斗样品（grab samples）的相关细节，以及针对这些样品的拟开展分析方案。

抓斗样品的分析结果将用于对该海湾内发现的各类表层沉积物类型进行分类，并绘制其空间分布图谱。对振动岩芯的分析与解译，则可重建科伯恩湾的地层框架。上述信息将与CWHM项目其他子项目的研究成果结合使用：例如，其将助力验证科廷大学（Curtin University）已开展及拟在科伯恩湾内实施的单波束声呐（single-beam sonar）与多波束声呐（multi-beam sonar）勘测成果的地面真实性。此外，该成果还将提供关键的基底基质信息，用于构建该海湾更全面的底栖栖息地（benthic habitat）分类体系。