Investigation of the exhumation mechanisms of the axial core of a collisional orogen, by means of structural analysis of brittle deformation and of thermochronology in the Eastern Alps.

通过东阿尔卑斯山脆性变形和热年代学的结构分析，研究碰撞造山带轴心的折返机制。

• 批准号: 70408000
• 负责人: Professor Dr. Mark R. Handy, since 11/2011
• 金额: --
• 依托单位: Institut für Geologie
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2008
• 资助国家: 德国
• 起止时间: 2007-12-31 至 2014-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/70408000?language=en
• 关键词: Investigation; exhumation; mechanisms; axial; core

Tertiary exhumation of the Eastern Alps remained localised within a restricted area (Tauern Window) from the early Tertiary to the Late Miocene. Based on previous and new thermo-chronological investigations the cooling patterns of this area will be constructed, with special attention to the relationship between the 3-D geometry of the isochrones, the 3-D geometry of the extensional fault planes, and the 3-D geometry of the large scale folds. These spatial relationships will be used to constrain the mechanisms of exhumation, i.e. the contribution of extensional unroofing vs. folding and erosion. The comparison of thermal models of endmember- types of exhumation by extensional unroofing and by folding and erosion, in addition to mixed-type models, will allow us to quantify the contribution of each mechanism to the bulk exhumation.Considering that brittle deformation generally starts after the rocks passed through the brittle-ductile transition, whose temperature is approximately defined by the annealing temperature of zircon fission tracks, we will define the maximum age of brittle structures by measuring zircon fission tracks. These ages combined with a structural analysis of brittle deformation will allow us to reconstruct the middle- to late Miocene kinematics and paleostress fields of the axial core of the Eastern Alps, and to constrain the late mechanisms of exhumation.

东阿尔卑斯的第三纪发掘仍然局限于早第三纪到晚中新世的一个有限区域（陶恩窗口）。在以往和新的热年代学研究的基础上，将构建该地区的冷却模式，特别关注等时线的三维几何形状、伸展断面的三维几何形状和大型褶皱的三维几何形状之间的关系。这些空间关系将被用来限制挖掘的机制，即伸展拆顶与褶皱和侵蚀的贡献。除了混合类型模型外，通过拉伸拆顶和折叠侵蚀的端元挖掘类型的热模型的比较，将使我们能够量化每种机制对整体挖掘的贡献。考虑到岩石脆性变形一般发生在脆性-韧性转变之后，其温度由锆石裂变径迹的退火温度近似确定，我们将通过测量锆石裂变径迹来确定脆性结构的最大年龄。这些年龄结合脆性变形的结构分析，将使我们能够重建中新世中晚期东阿尔卑斯轴核的运动学和古应力场，并约束发掘的晚期机制。

项目成果

Fault slip analysis and late exhumation of the Tauern Window, Eastern Alps

• DOI: 10.1016/j.tecto.2015.01.002
• 发表时间: 2015-05-09
• 期刊: TECTONOPHYSICS
• 影响因子: 2.9
• 作者: Bertrand, Audrey;Rosenberg, Claudio;Garcia, Sebastian
• 通讯作者: Garcia, Sebastian

Reply to the comment of Fügenschuh et al. on the paper ‘Estimating displacement along the Brenner Fault and orogen-parallel extension in the Eastern Alps’ by Rosenberg and Garcia, Int J Earth Sci (Geol Rundsch) (2011) 100:1129–1145

回复 Fügenschuh 等人对 Rosenberg 和 Garcia 撰写的论文“估计沿布伦纳断层的位移和东阿尔卑斯山造山带平行延伸”的评论，Int J Earth Sci (Geol Rundsch) (2011) 100:1129â 1145

• DOI: 10.1007/s00531-011-0726-3
• 发表时间: 2011
• 期刊: International Journal of Earth Sciences
• 影响因子: 2.3
• 作者: Rosenberg;Garcia
• 通讯作者: Garcia

Estimating displacement along the Brenner Fault and orogen-parallel extension in the Eastern Alps

估计沿布伦纳断层和东阿尔卑斯山造山带平行延伸的位移

• DOI: 10.1007/s00531-011-0645-3
• 发表时间: 2011
• 期刊: International Journal of Earth Sciences
• 影响因子: 2.3
• 作者: Rosenberg;Garcia
• 通讯作者: Garcia

Relating collisional kinematics to exhumation processes in the Eastern Alps

• DOI: 10.1016/j.earscirev.2017.10.013
• 发表时间: 2018
• 期刊: Earth-Science Reviews
• 影响因子: 12.1
• 作者: C. Rosenberg;S. Schneider;A. Scharf;A. Bertrand;K. Hammerschmidt;A. Rabaute;J. Brun

Exhumation mechanisms of the Tauern Window (Eastern Alps) inferred from apatite and zircon fission track thermochronology

• DOI: 10.1002/2016tc004133
• 发表时间: 2017-02-01
• 期刊: TECTONICS
• 影响因子: 4.2
• 作者: Bertrand, Audrey;Rosenberg, Claudio;Fuegenschuh, Bernhard
• 通讯作者: Fuegenschuh, Bernhard