Middle to Late Paleozoic Extensional Development of the Lofoten Archipelago, North Norwegian Caledonides

挪威北部喀里多尼德群岛罗弗敦群岛中晚古生代的伸展发育

• 批准号: 9506698
• 负责人: Willis Hames
• 金额: $ 13.04万
• 依托单位: Auburn University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1995
• 资助国家: 美国
• 起止时间: 1995-06-15 至 1997-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9506698&HistoricalAwards=false
• 关键词: Middle; Late; Paleozoic; Extensional; Development

Current tectonic models for the Scandinavian Caledonides indicate the Lofoten archipelago contains crust from the western edge of the Baltic craton that was deeply subducted during Silurian collisions with Laurentia, however few studies have addressed either the evidence for deep burial or the timing of such burial and exhumation. This project will follow new data that suggests that these rocks were buried to depths of 30km, but returned to the surface much more slowly and in distinct episodic events. In addition to the significance for Caledonia tectonics, this study will be relevant to the diverse fields of tectonic work to evaluate the relationship between the original thickness and structure of an orogen, the duration and processes of unroofing orogenic and thick continental crust and attenuation of lithosphere along an evolving continental margin.

斯堪的纳维亚加里东地区的当前构造模型表明，罗弗敦群岛包含来自波罗的海克拉通西部边缘的地壳，该地壳在志留纪与劳伦提斯碰撞期间深深俯冲，但很少有研究涉及深埋的证据或这种埋葬和挖掘的时间。 该项目将遵循新的数据，这些数据表明这些岩石被埋在30公里深的地方，但返回地表的速度要慢得多，而且是在不同的事件中。 除了对喀里多尼亚构造学的意义外，这项研究还将与构造工作的不同领域有关，以评价造山带的原始厚度和结构、造山带和厚大陆地壳的去顶持续时间和过程以及岩石圈沿沿着不断演变的大陆边缘的衰减之间的关系。