Tectonics and Structure of the Laptev Sea Rift and Cherskii Thrust Belt, Northeast Siberia

拉普特夫海及其邻近地区是一个独特的地区，大陆裂谷发生在大洋中脊系统的直接延伸上，两个板块之间的旋转极大约位于分隔它们的板块边界上。由于该地区人迹罕至，地震活动水平中等，直接研究其现今构造是困难的。因此，它是世界上最不被理解的地区之一。地震学分析技术的进步使研究比以前可能发生的震级更小、数量更多的地震成为可能。这项调查将研究北美-欧亚板块边界地震的震源机制和深度，因为它首先从大洋裂谷转变为大陆裂谷，然后进入逆冲和走滑运动区。地震数据将得到陆地卫星图像和苏联地质数据的补充，以帮助解释。这些研究将有助于理解北冰洋的构造演化、大陆裂谷和陆内板块边界的演化。

The Laptev Sea and adjacent areas represent a unique region where continental rifting is occurring on a direct extension of a mid- oceanic ridge system and where the pole of rotation between two plates lies approximately on the plate boundary separating them. Due to the inaccessibility of this region and the moderate level of seismicity, study of its present day tectonics by direct means is difficult. Therefore, it is one of the least understood regions of the world. Advances in seismological analysis techniques allow the study of earthquakes of smaller magnitude and in larger numbers than was previously possible. This investigation will study focal mechanisms and depths of earthquakes along the North America - Eurasia plate boundary as it changes first from an oceanic to a continental rift, and then into a zone of thrusting and strike-slop motion. Seismological data will be supplemented by Landsat imagery and Soviet geologic data to aid in interpretations. These studies will contribute to understanding the tectonic evolution of the Arctic Ocean, continental rifts, and the evolution of intracontinental plate boundaries.