New tools for old rocks: first cycle provenance information

老岩石的新工具：第一周期来源信息

• 批准号: LP180100199
• 负责人: Prof Christopher Kirkland
• 金额: $ 24.81万
• 依托单位: Curtin University
• 依托单位国家: 澳大利亚
• 项目类别: Linkage Projects
• 财政年份: 2019
• 资助国家: 澳大利亚
• 起止时间: 2019-07-01 至 2022-06-30
• 项目状态: 已结题
• 来源: https://dataportal.arc.gov.au/RGS/Web/Grants/LP180100199
• 关键词: New; tools; old; rocks; first

The aims of this research are to enhance stratigraphic understanding of sedimentary sequences in Western Australia through application of novel provenance fingerprinting tools in K-feldspar (Pb isotopes) & apatite (U-Pb, Sr isotopes and grain chemistry). While much stratigraphic characterization has been based on detrital zircon ages & their correlation to basement sources, two major limitations are apparent: a) zircon may be multicycle, blurring source-sink relationships, b) zircon may be absent in mafic lithologies thus biasing investigations. In this work K-feldspar & apatite provenance investigation will be undertaken on a state wide basis and include case studies in the Yilgarn Craton and Canning & Northern Carnarvon Basins.

这项研究的目的是通过在钾长石(铅同位素)和磷灰石(U-铅、锶同位素和颗粒化学)中应用新的物源指纹工具，加强对西澳大利亚沉积层序的地层学认识。虽然许多地层描述都是基于碎屑锆石年龄及其与基底来源的相关性，但两个主要限制是明显的：a)锆石可能是多旋回的，模糊了源汇关系；b)镁铁质岩性中可能没有锆石，从而影响了研究。在这项工作中，将在全州范围内进行钾长石和磷灰石来源调查，包括伊尔加恩克拉通和坎宁和北卡纳冯盆地的案例研究。