Origins of Igneous Layering

火成岩层的起源

• 批准号: 9217664
• 负责人: A. Boudreau
• 金额: $ 6.2万
• 依托单位: Duke University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1993
• 资助国家: 美国
• 起止时间: 1993-01-15 至 1995-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9217664&HistoricalAwards=false
• 关键词: Origins; Igneous; Layering

The objective of the proposed research is to use numerical models of crystallization processes to further understand the origins of layering in igneous rocks. The emphasis is on a post-nucleation process termed crystal aging (Ostwald ripening) that can give rise to fine-scale layering as a result of rhythmic long-range order related to dissolution of small crystals and growth of larger crystals. The results of this research should increase understanding of the petrogenesis and origin of layered mafic and ultramafic intrusions, which are the major source of the platinum group elements.

本研究的目的是利用结晶过程的数值模型进一步了解火成岩层状的起源。 重点是称为晶体老化（奥斯特瓦尔德熟化）的成核后过程，该过程可以由于与小晶体溶解和较大晶体生长相关的有节奏的长程有序而产生精细尺度的分层。 这项研究的结果应该会增加对层状镁铁质和超镁铁质岩体的岩石成因和起源的了解，而层状镁铁质和超镁铁质岩体是铂族元素的主要来源。