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从南安纽伊带延伸到新西伯利亚阿尔希拉哥的中生代褶皱带,其中北极地体的演化无疑是由移动的地体与西伯利亚大陆边缘碰撞来确定。可是,有关他层序列,构造历史,许多地块的边界断层以及这些地块何处产生,何处运动和如何拼接起来并构成大陆格架的,则知道得很少。本课题目标是由海洋研究所高纬度考查队于1986年夏天在该褶皱带西端附近进行详细地贡研究的成果。已收集了大量新的构造、地层和古地磁证据,支持了这样一个假说:所研究区域由晚侏罗—早白垩世、沿活动变形的大陆边缘所增生的构造地层地体构成。其中某些地体,由于欧亚盆地在新生代的开裂而重新解体,我们可区别以下区域为独立地体。 1.邻近Laptev海西部大陆架的Bel’kovsky,Kotel’nyi岛。
The Mesozoic fold belt that stretches from Nananui to Arushago, Novosibirsk, where the evolution of the Arctic is undoubtedly determined by the collision of the moving terrain with the edge of the Siberia continent. However, little is known about the sequence of strata, the tectonic history, the boundary faults of many plots, and where and how these plots have been created, spliced together and formed the continental shelf. The objective of this project is the result of a detailed tribute study conducted by a high-latitude team of the Institute of Marine Research in the summer of 1986 in the vicinity of the western end of the fold belt. A great deal of new structural, stratigraphic and paleomagnetic evidence has been collected and supports the hypothesis that the area studied consists of Late Jurassic-Early Cretaceous tectonic stratigraphic bodies that proliferate along the deformable continental margin. Some of these terrains, because of the reorganization of the Eurasian basin during the Cenozoic cracking, can distinguish the following areas from one another. 1. Bel’kovsky, Kotel’nyi Island, near the western shelf of the Sea of Laptev.