应用震源机制解分析依兰-伊通地堑北段现代构造应力场  

ANALYSIS ON THE MODERN STRUCTURE STRESS FILED OF THE NORTHEN SECTION OF YILAN-YITONG GRABEN BY USING THE FOCAL MECHANISM SOLUTIONS

作　　者：张凤鸣 许晓艳 刘铁军 张世忠 孙文彬 

机构地区：[1]黑龙江省地震局,黑龙江哈尔滨150090 [2]鹤岗地震台,黑龙江鹤岗154101

出　　处：《东北地震研究》2005年第4期15-22,共8页Seismological Research of Northeast China

基　　金：黑龙江省自然科学基金项目(G2004-14)

摘　　要：应用震源机制解分析了依兰-伊通地堑断裂北段的汤原-萝北段的构造活动和现代构造应力场,结果表明:区域构造活动受地堑构造控制,NW向断裂是区内主要的发震构造,震源机制主压应力轴优势分布方向为NE50°～70°,仰角40°～60°.Using the focal machanism solutions, the structure activity and moder structural stress field of Tangyuan- Luobei section on Yilan-Yitong graben rift are analysed. The results show that the areal structural activity is controled by the graben rift, NW rifts are main seismic structures. The predominant distribution of the main pressure stress axis in NE 50°～70°, elevation angle is 40°～60°.

关 键 词：构造应力场 震源机制解 依兰-伊通地堑构造 

分 类 号：P315.7[天文地球—地震学]