塔里木盆地库车拗陷喜山期构造磁学研究

New Cretaceous, Paleogene and Neogene paleomagnetic data from the Tarim Block were obtained. We tried to explanation of the type of magnetic minerals, grain size and the change of the magnetic minerals in the diagenesis. New evidences for the Himalayan remagnetization were found widely existence and the affection to remanence was discussed. Possible origins of the remagnetization was presented. We believe that the rocks with dominant multi-domain magnetic minerals tend to be remagnetization, while sing-domain hematite/magnetite is the primary remanence carrier. Himalayan remagnetization is closely related with the alternation of magnetic carrier by tectonic carbohydrate fluid, which reflects the oil and gas accumulation and could be of great implication for petroleum distribution over the rocks. We also carry on the experiment investigation for inclination shollowing during compaction and deposition of the samples from the Cretaceous and Paleogene redbeds. By comparing the paleomagnetic results from marine sediments in Southwestern Tarim basin, we calculated the amount of inclination shollowing in Kuche depression. Finally, we discussed the Tarim block motion during the Himalayan period.

对塔里木盆地库车拗陷新生界的古地磁研究, 补充早第三纪数据的缺乏, 填补新第三纪莸目瞻? 通过岩石磁学与重磁化研究增强判别原生剩磁的可信度, 探讨喜山期构造流体饔糜跋? 进行白垩纪、早第三纪红层磁倾角偏低校正研究, 重新厘定塔里木板块白垩纪以吹墓乖煳恢? 综合新数据探讨喜山期板块运动的时空演变及与相邻板块的关系.