新潟県およびその周辺地域の地質構造

―3方向の大構造からなる東北日本弧の地質構造モデルとその形成テクトニクス―

抄録

In this paper I construct a macroscopic geological structural map of northern Honshu, Japan, including Niigata Prefecture, in order to comprehend its structural features. I also propose two tectonic models for late Cenozoic tectonics of northern Honshu and Japan Sea opening in particular: strike-slip fault system and rift system. The latter system consists of first- and second-order (smaller scale) rift systems. Both rift systems have three arms of a triple junction. During Japan Sea opening, two of the three arms failed or stopped spreading in a shorter time than the third arm.