Rifting of continental margins and evolution of conjugated margins in the Tyrrhenian Sea caused by subduction-related slab roll back

俯冲板块回滚引起的第勒尼安海大陆边缘裂谷和共轭边缘演化

• 批准号: 166038460
• 负责人: Professor Dr. Ingo Grevemeyer
• 金额: --
• 依托单位: Istituto di Scienze Marine (ISMAR)
• 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/166038460?language=en
• 关键词: Rifting; continental; margins; evolution; conjugated

Rifted margins are areas of dense population and host major energy resources in the subsurface. However, the geological processes that control the formation of continental margins are yet not well understood. It is the aim of the proposed project to constrain the temporal and spatial distribution of stretching and crustal thinning of conjugate margins to gain insight into the geological processes underlying continental margin formation. The Tyrrhenian Basin is a confined rift basin with active rifting at its edges and it has the advantage of well preserved, un-deformed conjugate margins in its central part. This makes it an ideal natural laboratory to study the formative processes of rifted margins. We propose a collaborative project with partners from Spain and Italy to address these questions in a multi-disciplinary project. New data will be acquired during a two ship operation in April 2010. The Spanish R/V Sarmiento de Gamboa will collect multi-channel seismic (MCS) data and operate airguns for seismic refraction and wide-angle work. Ocean-bottom stations for the refraction work will be deployed and recovered from the Italian vessel R/V Urania. Several geophysical transects will cross the Tyrrhenian Basin, sampling conjugate margins that have been formed under different amount of stretching. The comparison of the crustal and upper mantle structure derived from seismic reflection and seismic refraction data along different transects will permit to unravel the evolution of the processes of continental margin formation by trading space (different areas with different stretching factors) for time (evolution of extension).

断裂边缘是人口密集的地区，地下蕴藏着主要的能源资源。然而，控制大陆边形成的地质过程尚未得到很好的了解。拟议项目的目的是限制共轭边缘拉伸和地壳减薄的时空分布，以深入了解大陆边形成的地质过程。第勒尼安盆地是一个边缘裂陷活跃的封闭裂谷盆地，其优势在于其中部共轭边缘保存完好、未变形。这使它成为研究裂陷边缘形成过程的理想天然实验室。我们提出了一个合作项目，从西班牙和意大利的合作伙伴，以解决这些问题的多学科项目。新的数据将在2010年4月的两艘船运行期间获得。西班牙“Sarmiento de Gamboa”号研究船将收集多道地震数据，并操作气枪进行地震折射和广角工作。将从意大利R/V Urania号船上部署和回收用于折射工作的海底台站。几个地球物理断面将穿过第勒尼安盆地，采样在不同拉伸量下形成的共轭边缘。通过比较从沿着不同断面的地震反射和地震折射数据得出的地壳和上地幔结构，可以通过以空间（具有不同拉伸因素的不同地区）换取时间（拉伸的演变）来揭示大陆边形成过程的演变。

项目成果

Crustal thinning in the northern Tyrrhenian Rift: Insights from multichannel and wide‐angle seismic data across the basin

第勒尼安裂谷北部地壳减薄：来自整个盆地多道和广角地震数据的见解

• DOI: 10.1002/2013jb010431
• 发表时间: 2014
• 期刊: Journal of Geophysical Research
• 作者: Moeller;I. Grevemeyer;C. R. Ranero;C. Berndt;D. Klaeschen;V. Sallares;N. Zitellini;R. de Franco
• 通讯作者: R. de Franco

Early‐stage rifting of the northern Tyrrhenian Sea Basin: Results from a combined wide‐angle and multichannel seismic study

第勒尼安海盆地北部的早期裂谷：广角和多道地震联合研究的结果

• DOI: 10.1002/ggge.20180
• 发表时间: 2013
• 期刊: Geochemistry
• 影响因子: 3.7
• 作者: Moeller;I. Grevemeyer;C. R. Ranero;C. Berndt;D. Klaeschen;V. Sallares;N. Zitellini;R. de Franco
• 通讯作者: R. de Franco

Seismic structure of the Central Tyrrhenian basin: Geophysical constraints on the nature of the main crustal domains

中第勒尼安盆地的地震结构：对主要地壳域性质的地球物理约束

• DOI: 10.1002/2013jb010527
• 发表时间: 2014
• 期刊: Journal of Geophysical Research: Solid Earth
• 作者: M.V. Sallares;C.R. Ranero;M.G. Vendrell;I. Grevemeyer;N. Zitellini;R. de Franco
• 通讯作者: R. de Franco