Tectonometamorphic evolution of the Western Rhodope complex - a record of multiple continent collision?

西罗多彼杂岩的构造变质演化——多个大陆碰撞的记录？

• 批准号: 19657490
• 负责人: Professor Dr. Nikolaus Froitzheim
• 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: 2006
• 资助国家: 德国
• 起止时间: 2005-12-31 至 2011-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/19657490?language=en
• 关键词: Tectonometamorphic; evolution; Western; Rhodope; complex

The Rhodope Complex in Bulgaria and Greece represents a stack of metamorphic thrust nappes recording a long history of Alpine orogenic deformation from Jurassic to present, including periods of thrusting and of extensional shearing and faulting. Previous work suggested that high- and ultrahigh-pressure metamorphism occurred at several times during the Alpine cycle (Jurassic, Cretaceous, and Tertiary). Our working hypothesis is that these metamorphic events resulted from multiple collisions of microcontinents, and that the exhumation of the high- and ultrahigh-pressure rocks resulted from processes inherent in multiple continent collision. We intend to study the kinematics, timing, and plate tectonic setting of these events by analysing the structural and metamorphic evolution of the western Rhodope complex (Rila, Pirin, West Rhodopes) in Bulgaria and Greece, using a combination of field mapping, kinematic analysis of shear zones (structures, microstructures and textures), metamorphic petrology (P-T-determi nation), and geochronology (U-Pb SHRIMP dating of zircon). The study area in the western part of the Rhodope complex is ideally suited for investigating the effects of multiple continent collision because of the presence of important shear zones, both compressional and extensional, of ophiolitic sutures, of pre-, syn- and posttectonic granitoid intrusions allowing to date the shear zones, and of Tertiary, detachment-related basins whose position and sediment fill record the late stages of extensional deformation and the unroofing of the metamorphic complexes.

保加利亚和希腊的Rhodope复合物代表了一堆变质的推力，记录了从侏罗纪到现在的高山造型变形的悠久历史，包括推力时期和延伸性剪切和断层。先前的工作表明，高山周期（侏罗纪，白垩纪和第三纪）的高压变质发生了几次。我们的工作假设是，这些变质事件是由微接合人的多次碰撞引起的，而高压和超岩石岩石的发掘是由多个大陆碰撞固有的过程产生的。我们打算通过分析保加利亚和希腊中西方罗德波群复合物（Rila，Pirin，West Rhodopes）的结构和变质演化的这些事件的运动学，时机和板块构造设置，并使用现场映射的组合，shear zone（shearology of shear zone）（Micros of traperers，perterers threm threm threm threm threm offerers，pertermenters and persrim and trpherers gromant ins gromanters gromant in Methorm offiens，pirin，pirin，west Rhodopes）。国家）和年代学（锆石的U-PB虾约会）。在罗渡波复合体西部的研究区域非常适合研究多个大陆碰撞的影响，因为存在重要的剪切区，无论是压缩和延伸的，蛇质缝合线的，胶合缝线的，前，综合和后传感器后的花岗岩进攻，允许造成的剪切量和固定底座的固定型和固定的固定剂，并构成固定的底座和固定型，并固定在固定的底座上，并置于固定的底座和固定的固定层。以及变质络合物的不屋顶。