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Sedimentary processes in Lake Van, Turkey - correlation of high resolution seismic records with physical properties data

土耳其凡湖的沉积过程 - 高分辨率地震记录与物理特性数据的相关性

基本信息

批准号：
114932801
负责人：
Professor Dr. Sebastian Krastel
金额：
--
依托单位：
Arbeitsgruppe Marine Geophysik und Hydroakustik
依托单位国家：
德国
项目类别：
Infrastructure Priority Programmes
财政年份：
2009
资助国家：
德国
起止时间：
2008-12-31 至 2012-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/114932801?language=en
关键词：
Sedimentary processes Lake Van Turkey

项目摘要

Lake Van in Eastern Anatolia (Turkey) is the fourth largest of all terminal lakes in the world (surface area of 3,522 km², volume of 576 km³, maximum depth of 451 m, maximal length of 130 km WSW-ENE). Previous scientific work has shown that Lake Van has an excellent potential as a high resolution paleo-climate archive caused by the presence of annually laminated lacustrine sediments. As Lake Van can act as a key site for the investigation of the Quaternary climatic evolution of the Near East, an ICDP drilling campaign is scheduled for summer 2009. Five primary sites are proposed based on high resolution seismic data collected during a pre-site survey in 2004. The main aim of this proposal is an integrated interpretation of the drilling and seismic data in order to reconstruct the genesis and evolution of Lake Van. Synthetic seismograms will be calculated for a correlation of seismic and drill data. An intensive logging program (core and downhole logging) will be the basis for this approach. The integration of logging and seismic data allows extrapolating the stratigraphy from the wells to 3D-space by using the seismic data. Special emphasis will be drawn on the timing of widespread mass wasting events, which might be used as proxy for estimating the paleo-seismicity and on lake-level fluctuations, which played an important role for the sedimentary evolution of Lake Van.

土耳其安纳托利亚东部的凡湖是世界上第四大终端湖(面积3522平方公里，体积576公里，最大深度451米，最大长度130公里)。以前的科学研究表明，凡湖具有作为高分辨率古气候档案的极好潜力，这是由于存在每年一次的层状湖泊沉积物造成的。由于凡湖可以作为调查近东第四纪气候演变的关键地点，国际地球科学中心计划在2009年夏季开展钻探活动。根据2004年前期调查期间收集的高分辨率地震数据，提出了五个主要选址。这一建议的主要目的是对钻井和地震资料进行综合解释，以重建凡湖的成因和演化。将计算合成地震记录，以便将地震数据和钻井数据相关联。密集的测井程序(岩心和井下测井)将是这种方法的基础。测井和地震资料的结合使得利用地震资料将地层从井中外推到三维空间。将特别强调大范围物质损耗事件的发生时间，这可能被用来估计古地震活动和湖平面波动，这对凡湖的沉积演化起到了重要作用。