满都拉—卡楚加的长剖面地壳介质密度分布及深部结构特征探榷

通过对南起中国内蒙古满都拉、向北经蒙古国、直抵北端俄罗斯贝加尔湖北卡楚加全长1320km长重力剖面的布格重力异常数据进行处理和解析, 依其构建了沿剖面的二维地壳密度结构模型, 并详细分析了沿剖面的地壳底界面(Moho界面)展布的深部构造特征, 及剖面辖域内的5个次级局部构造单元的重力异常场、地壳密度结构、界面起伏及断裂构造分布的特征.期望此研究结果能为该剖面跨越的中亚造山带东部地区的地壳结构、各次级构造单元的界域与关联方面的进一步研究提供相关的重力场依据.

Discussion on the crustal density distribution and deep crustal structure of the super-long profile from Mandula (Inner Mongolia) to Kachujia (Russia)

Using the gravity anomaly dataset of the 1320 km long profile from Mandula (Inner Mongolia) in the south, through Mongolia to the Kachujia (Russia) in the north of Baikal, the 2D crustal density structure model has been constructed in this study. We have analyzed the deep structural features along with the Moho interface of the profile including the gravity anomaly, the crustal density structure, the interface undulation and fault distribution for each tectonic unit. This result can provide the proof of gravity field for the further understanding of the crustal structure of the area across the profile, the boundaries and correlations of tectonic units, and the related continental dynamics.