Syn- and post-collisional sedimentation and volcanic activity, Mesta half Graben, Bulgaria

保加利亚梅斯塔半海沟的同碰撞和碰撞后沉积以及火山活动

• 批准号: 19658174
• 负责人: Professor Dr. Tom McCann
• 金额: --
• 依托单位: Abteilung 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 2010-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/19658174?language=en
• 关键词: Syn; post; collisional; sedimentation; volcanic

The Mesta half-graben is an intra-orogenic basin that formed in response to the collision of minor lithospheric fragments within the Eurasian craton during Eocene times. This basin experienced successive stages of subsidence accompanied by intense post-collisional mafic to felsic volcanism. The volcano-sedimentary successions represent a complex interdigitating record of detrital material derived from the adjacent collisional belts and the locally-derived volcaniclastic units. The principal aim of this project is to combine sedimentological and volcanic facies studies with basin analysis in order to decipher the interplay of sedimentation, volcanism and tectonics. This requires detailed reconstructions of the depositional settings and the volcanic centres in the Mesta half-graben, their relative and absolute timing, correlation of time-equivalent units and definition of widespread marker horizons such as fall deposits. Linking this information with provenance studies, tectonic information and sequence analysis of the sedimentary units will provide a detailed picture of the evolution of intra-collisional units.

Mesta半地堑是一个造山带内盆地，形成于始新世时期欧亚克拉通内的小岩石圈碎片碰撞。该盆地经历了连续的沉降阶段，伴随着强烈的碰撞后镁铁质到长英质火山作用。火山-沉积序列代表了来自相邻碰撞带的碎屑物质和当地衍生的火山碎屑单元的复杂交错记录。该项目的主要目的是将联合收割机沉积学和火山相研究与盆地分析结合起来，以便解释沉积、火山作用和构造的相互作用。这需要详细重建的沉积环境和Mesta半地堑的火山中心，其相对和绝对的时间，时间等效单位的相关性和广泛的标志层，如下降存款的定义。将这些信息与物源研究、构造信息和沉积单元的层序分析联系起来，将提供碰撞内单元演化的详细情况。