Crustal and lithosheric structure of the subducting Adriatic Plate and the external accretionary wedge in the soutern Dinarides

我们建议在2012年1 - 2月由FS Meteor号科考船进行的活跃的Alpha（亚德里亚岩石圈调查）海上实验期间在黑山安装两个检波器剖面。这些剖面将扩展亚得里亚海近海OBS（海底地震仪）剖面，以实施跨海岸线两栖研究。海上和陆上站点将记录FS Meteor上主动地震实验期间产生的气枪射击。结合这些数据，不仅可以对亚得里亚海近海板块的地壳和岩石圈结构进行成像，还可以对整个板块弯曲区域和板块俯冲部分进行成像，其中包括顶部外部Dinarides的活跃增生楔。这个两栖运动将是第一个通过造山带系统的基于折射的层析成像剖面。这个系统特别令人感兴趣，因为：(1)它代表了为数不多的退缩俯冲带之一，它长期消耗了大陆岩石圈；(2)从前缘的压缩到楔内的伸展的过渡发生在极短的距离内，相当多的逆冲正断层地震彼此相距仅30公里左右。控制这些过程的参数在很大程度上是未知的，这项低成本的研究将为理解潜在的力学和岩石圈几何结构提供基本的约束。

We propose to install two profiles of geophones in Montenegro during the active offshore experiment Alpha (Adria lithosphere investigation) which is scheduled for the research vessel FS Meteor in January-February 2012. These profiles will extend the offshore OBS (ocean bottom seismometer) profiles in the Adriatic Sea to implement a shoreline-crossing amphibious study. Offshore and onshore stations will record the airgun shots generated during the active seismic experiment onboard FS Meteor. The combined data will allow imaging the crustal and lithospheric structure not only of the Adriatic Plate offshore but also of the complete region of plate bending, and the subducting portion of the plate including the active accretionary wedge of the external Dinarides on top. This amphibious campaign would be the first refraction-based tomographic section through the orogenic system. This system is of particular interest as (1) it represents one of the few retreating subduction zones, which has consumed continental lithosphere for a long time and (2) the transition from compression at the front and extension within the wedge occurs over an extremely short distance with considerable thrustand normal-fault earthquakes being located only about 30 kilometres apart from each other. The parameters controlling these processes are largely unknown and this low-cost study will provide fundamental constraints for understanding the underlying mechanics and lithosphere geometry.