Seismicity and Neotectonics of Northeast Russia

建议编号：OPP-9806130主要调查者：藤田，库祖亚俄罗斯东北部是一个地震活动区，由于北美和欧亚板块边界以及它们之间的一系列小地块的相互作用，产生了新的构造变形。板块和块体的相互作用导致了高水平的地震活动、隆起、断层和局部裂谷作用。首席调查员将详细审查的具体区域是切尔斯基山脉和科里亚克高地。这些区域包括位于北美和欧亚板块边界的自转极，流入北冰洋的大河，以及北美板块内地震最活跃的地区之一。首席调查员将使用过去五年通过密歇根州立大学-阿拉斯加大学-费尔班克斯大学与俄罗斯东部研究所合作项目收集的独特的、以前无法访问的数据集。这些数据集包括雅库特和马加达姆区域网络1980-1995年期间的地震震相数据、带有1970-1990年俄罗斯东部大陆较大地震震相数据的公报、1：200 000比例尺的完整军事地形图覆盖范围、1：500 000和1：1 500 000比例尺地质图、卫星图像以及关于断裂和地震诱发特征的信息。这项拟议研究的结果应有助于更好地了解汇聚板块边界的大陆内变形情况，改进危害评估，记录流入北冰洋的沉积物的来源和性质，并确定用于实地研究的较小区域。

Proposal Number: OPP-9806130Principal Investigator: Fujita, KuzuyaNortheastern Russia is a seismically active region with neotectonic deformation from the interaction of the North American and Eurasian plate boundaries and a series of small blocks between them. The plate and block interactions result in high levels of seismicity, uplift, faulting, and local rifting. The specific area that the Principal Investigator will examine in detail is in the Chersky Range and Koryak Highlands. These areas include the pole of rotation that lies along the North American and Eurasian plate boundaries, large rivers that flow into the Arctic Ocean, and one of the most seismically active regions within the North American plate. The Principal Investigator will use a unique, previously inaccessible data set that was collected during the past five years through the Michigan State University -University of Alaska-Fairbanks cooperative program with institutes in eastern Russia. These data sets consist of seismic phase data from the Yakutian and Magadam regional networks for the period 1980-1995, bulletins with phase data for larger earthquakes in continental eastern Russia for 1970-1990, complete ex-military topographic map coverage at a scale of 1:200,000, geologic maps at scales of 1:500,000 and 1:1,500,000, satellite images, and information on faulting and earthquake-induced features. Results from this proposed study should provide a better understanding of intra-continental deformation in convergent plate boundaries, improved hazard assessment, documentation of the sources and nature of sediments flowing into the Arctic Ocean, and identification of smaller regions for field study.