Spatial and temporal relationships between Tethyan ophiolites and metamorphic soles

特提斯蛇绿岩与变质底的时空关系

• 批准号: 170705075
• 负责人: Dr. Matthias Barth
• 金额: --
• 依托单位: Institut für Geowissenschaften
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2010
• 资助国家: 德国
• 起止时间: 2009-12-31 至 2014-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/170705075?language=en
• 关键词: Spatial; temporal; relationships; between; Tethyan

Ophiolites are fragments of oceanic lithosphere that are exhumed onto the continental crust during collision. Thin sheets of high-grade metamorphic rocks, called metamorphic soles, are found beneath many ophiolites. These metamorphic soles are regarded as a clue to understanding the emplacement processes of the ophiolite complexes, since they apparently formed at the initiation of intra-oceanic subduction and because their age can be radiometrically dated. This proposal intends to study the spatial and temporal relationships between ophiolites and their associated metamorphic soles in the Dinaric-Hellenic ophiolite belt, with the Mesozoic Zlatibor Ophiolite in Serbia as the main locality. The aims of this project is to find out by means of microstructural, geochemical, and geochronological analysis whether the apparent forearc setting of the ophiolites is (1) a reflection of both their igneous environment of formation and subsequent emplacement or (2) a tectonic artifact of their postmagmatic emplacement in a forearc setting following changes in the regional tectonic regime and plate interactions.

蛇绿岩是大洋岩石圈的碎片，在碰撞过程中被挖出到大陆地壳上。在许多蛇绿岩的下面发现了高级变质岩的薄片，称为变质底。这些变质底被认为是了解蛇绿岩复合体侵位过程的线索，因为它们显然形成于洋内俯冲的开始，而且它们的年龄可以通过辐射测定法确定。本研究以塞尔维亚中生代兹拉蒂博尔蛇绿岩为主要产地，探讨了Dinaric-Hellenic蛇绿岩带中蛇绿岩及其伴生变质底的时空关系。本项目的目的是通过显微构造、地球化学和年代学分析，查明蛇绿岩的弧前环境是（1）其形成和随后侵位的岩浆环境的反映，还是（2）其在区域构造体制和板块相互作用变化后在弧前环境中岩浆后侵位的构造人工产物。