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Sedimentary and neotectonic history of Lake Ohrid (Macedonia/Albania): acquisition and interpretation of new geophysical and geological data

奥赫里德湖（马其顿/阿尔巴尼亚）的沉积和新构造历史：新地球物理和地质数据的获取和解释

基本信息

批准号：
65307810
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：
2008
资助国家：
德国
起止时间：
2007-12-31 至 2012-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/65307810?language=en
关键词：
Sedimentary neotectonic history Lake Ohrid

项目摘要

Lake Ohrid at the Macedonian/Albanian border is one of the oldest lakes in Europe and was tectonically formed probably during the Tertiary. Lake Ohrid houses large concentrations of endemic taxa and represents a first class site to investigate the link between geological and biological evolution in lakes. Lake Ohrid was included as a target area of ICDP already in 1993 but appropriate site survey data were lacking. In the first phase of the project detailed on- and offshore investigations were carried out in order to reveal the Neogene depositional and tectonic history of Lake Ohrid and to evaluate the potential for deep drilling. The new seismic data show numerous sedimentary features such as terraces, clinoforms, mass movement deposits and areas of extensive faulting, but also a deep central basin with undisturbed sediments. Sediment thickness on top of the basement is up to almost 700m. Based on the acoustic data, five primary sites were chosen as potential drilling targets. The onshore work concentrated on detailed paleostress analyses including morphotectonics, which lead to a preliminary stress history with three individual phases. The results of the first project phase are essential parts of drilling proposal ‘Scientific Collaboration On Past Speciation Conditions in Lake Ohrid (SCOPSCO), which was submitted to ICDP in January 2009. Planned work in this prolongation proposal mainly aims in i) studying the depositional history of Lake Ohrid, reflecting environmental changes, and ii) performing detailed structural and fault analyses of Lake Ohrid and its surrounding.

位于马其顿/阿尔巴尼亚边境的奥赫里德湖是欧洲最古老的湖泊之一，可能是在第三纪构造形成的。奥赫里德湖拥有大量特有类群，是研究湖泊地质和生物进化之间联系的一流场所。奥赫里德湖早在 1993 年就被列为 ICDP 的目标区域，但缺乏适当的现场调查数据。在该项目的第一阶段，进行了详细的陆上和海上调查，以揭示奥赫里德湖的新近纪沉积和构造历史，并评估深钻的潜力。新的地震数据显示了许多沉积特征，例如阶地、斜面、大规模运动沉积物和广泛的断层区域，而且还显示了一个具有未受干扰沉积物的深层中央盆地。地下室顶部沉积物厚度达近700m。根据声学数据，选择了五个主要地点作为潜在的钻探目标。陆上工作集中于详细的古应力分析，包括形态构造学，从而得出具有三个单独阶段的初步应力历史。第一阶段项目的结果是钻探提案“奥赫里德湖过去物种形成条件的科学合作”(SCOPSCO) 的重要组成部分，该提案于 2009 年 1 月提交给 ICDP。该延长提案的计划工作主要旨在 i) 研究奥赫里德湖的沉积历史，反映环境变化，以及 ii) 对奥赫里德湖及其周边地区进行详细的结构和断层分析。