黑龙江省东部区域动力学环境分析

Analysis on Geological Dynamic Condition in Hei Longjang Eastern Area

从区域地质构造背景分析入手,在研究岩层建造、花岗岩带分布及深大断裂特征的基础上,利用构造形迹的几何参数、声发射测试、有限元数值模拟3种方法恢复了黑龙江省东部区中—新生代构造应力场,提出了研究区的早白垩世构造应力场呈西、中、东应力不均衡分布的特征、晚白垩世及第三纪构造应力场为旋扭性特征、新第三纪构造应力场为北西—南东向挤压特征的新认识。通过分析区域动力环境,总结研究区构造发生、发展及演化特点,为该区成矿系统研究提供了构造资料。

Researched to start from geological-structural background in Heilongjang eastern area, base rock-constructing, granite distribution, deep-large break characteristic is analyzed, Mesozoic-Neozoic Structural stress-field is restored by using the three method-geometric parameter of structural formative-tracks, sonic-discharge determine and limiter dimension numeric imitate. A new viewpoint the early cretaceous structural stress-fields are unprop- ortional in western zone, middle zone, eastern zone, that late cretaceous and old tertiary structural stress-fields are gyral-torsional and that new tertiary structural crush -stress distributed at northwest-southeast direction is suggested. The aera＇s geological dynamic condition is analyzed; structural occurred, developed and evolved special feature is summed up. Structural information is provided for analyzing form-mine in the area.