黑龙江省东北部地区构造断裂与地震活动关系的研究

STUDY OF RELATIONSHIP BETWEEN TECTONIC FRACTURE AND SEISMOLOGICAL ACTIVITY IN THE NORTHEAST OF HEILONGJIANG PROVINCE

研究了本区主要构造断裂演化发展历史及各个时期地壳运动时的构造应力场特征以及它们的生成时间,通过对伊兰—伊通、龙江山字型、绥化—逊克和孙吴地堑四大构造体系的深入研究和探讨,指出本区现今区域构造应力场是近东西向水平挤压,南北顺时针、东西逆时针对扭的应力场源。同时对有历史记载以来的地震活动性和构造断裂存在关系进行分析研究,提出四大构造体系控制本区地震发生,特别明确龙江山字型构造体系是本区发震的起到主导作用的活动性特殊构造,并明确本区几个发震危险区。

The paper study evolving development history of main tectonic fracture ,the character of tectonic stress field in each period crustal movement and creation time of them in the zone, investigation and discussion pass by four tectonic system of YiLan-YiTong. LongJiang mountain style. SuiHua-XunKe ＆ SunWu graben, point out that the regional tectonic stress field is stress field resource pushing to the level in the west of near east now ,the north and south is clockwise, the west and east is unclockwiseo At the same time analyse and research seismic activity and tectonic fracture in the record of history ,Suggest four tectonic system control seismological occurrence ,especially define LongJiang mountain style tectonic system is active structure that lead to seismology in the area and make certain several hazardous area in it.