CASE 16 expedition: Does the Wegener Fault exist in the southern part of the Nares Strait region (Canadian Arctic)?

CASE 16 探险：内雷斯海峡地区（加拿大北极）南部是否存在韦格纳断层？

• 批准号: 262011051
• 负责人: Professor Dr. Werner von Gosen
• 金额: --
• 依托单位: Bundesanstalt für Geowissenschaften und Rohstoffe (BGR)
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2014
• 资助国家: 德国
• 起止时间: 2013-12-31 至 2015-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/262011051?language=en
• 关键词: CASE; 16; expedition; Does; Wegener

The Wegener Fault in the Nares Strait between Greenland and Ellesmere Island (Canadian Arctic) is interpreted as a sinistral transform fault that connected the Early Tertiary spreading systems of northern Baffin Bay and the Eurasian Basin. An entirely contrasting opinion, however, suggests that this fault does not exist and, therefore, cannot be used for plate tectonic reconstructions and interpretations. A critical area to solve this Wegener Fault problem is the Smith Sound in the southern part of Nares Strait. Interpreted results of aeromagnetic studies in this area have shown that magmatic dykes cross the strait and end just at the east coast of Ellesmere Island. Based on results from two expeditions, structural analyses during the CASE 16 expedition in this eastern segment of Ellesmere Island intend to find evidence for the existence of the Wegener Fault in the southern Nares Strait area. The results can contribute to solve the problem of the Wegener Fault and with that can either confirm or reject present plate tectonic interpretations. By this they can provide an important contribution to the interpretation of the development of the Arctic in the Early Tertiary.

格陵兰-埃尔斯米尔岛(加拿大北极)之间的Nares海峡的Wegener断层被解释为连接巴芬湾北部早第三纪扩张系统和欧亚盆地的左行转换断层。然而，一种完全相反的观点表明，该断层并不存在，因此不能用于板块构造的重建和解释。解决韦格纳断层问题的一个关键地区是纳尔斯海峡南部的史密斯海峡。这一地区的航空磁学研究的解释结果表明，岩浆堤坝穿过海峡，就在埃尔斯米尔岛的东海岸结束。根据两次探险的结果，在埃尔斯米尔岛东段进行的Case 16探险期间进行的构造分析旨在找到纳尔斯海峡南部地区存在韦格纳断层的证据。这一结果有助于解决韦格纳断裂的问题，并据此可以肯定或否定目前的板块构造解释。据此，可以为解释早第三纪北极的发展做出重要贡献。