论文部分内容阅读
本文结合晚白垩纪-新生代玄武岩类的组分和在地面及水中环境中熔宕冷却时所处的结晶条件,探讨了它们的磁性质,指出了二次氧化(磁赤铁矿化)、局部构造变形和古地磁场强度的可能变化对天然剩余磁性方向分布的影响,给出了Sikhote-Alin和Sakhalin地区的各个火山成因的杂岩的古地磁参考数据,并将它们与日本南朝鲜同时期岩石的古地磁数据作了对比。在包括Sikhote-Alin,西Sakhalin和南Kuril地区的范围内,存在着一个发育得很好的岛弧和大陆边缘杂岩区,由于它们的磁性与岩石成分、年龄和地层约束密切相关,这些火成岩发生了变异。
Based on the compositions of late Cretaceous-Cenozoic basalts and the crystallization conditions during the melt cooling in the ground and water environment, their magnetic properties are discussed. The effects of secondary oxidation (maghemite) The influence of local tectonic deformation and the possible change of paleomagnetic intensity on the distribution of natural residual magnetic direction, the palaeomagnetic reference data of various volcanic genetic complexes in the Sikhote-Alin and Sakhalin regions are given, and they are compared with those of southern Japan The palaeomagnetic data of the rocks were compared. Within the framework of the Sikhote-Alin, West Sakhalin and South Kuril regions, there is a well-developed island arc and continental margin complex that is closely related to rock composition, age and stratigraphic constraints due to their magnetism Variation occurred.