节点文献

黑龙江五大连池火山群火山分布与断裂关系新认识

Vent Distribution of Wudalianchi Volcanoes Heilongjiang Province,China,and Its Relation to Faults

  • 推荐 CAJ下载
  • PDF下载
  • 不支持迅雷等下载工具,请取消加速工具后下载。

【作者】 毛翔李江海高危言张天然

【Author】 MAO Xiang,LI Jiang-hai,GAO Wei-yan,ZHANG Tian-ran(The Key Laboratory of Orogenic Belts and Crustal Evolution,Ministry of Education,School of Earth and Space Sciences,Peking University,Beijing 100871,China)

【机构】 造山带与地壳演化教育部重点实验室,北京大学地球与空间科学学院

【摘要】 五大连池是世界陆内单成因火山的典型代表,明确断裂与火山排布关系对研究此类火山活动过程具有重要意义。通过地表观察与遥感图像解译,结合区域构造、地表出露断裂或破裂带、火山喷发时间次序(如一些火山存在由SW向NE依次喷发的规律)、区域剖面图以及不同向排布的火山规模规律等现象,研究了五大连池陆内单成因火山群火山排布与断裂的相关关系,认为五大连池地区具有NE,NW和近E-W三组方向的7条断层。区域大地电磁资料以及东北地区深部构造研究也支持这一分析。由于这三组方向的断裂还出现于火山活动之前的花岗岩之中,加之地震数据、地质历史时期的应力状态以及河流阶地研究显示在火山活动时期本地区不存在活动断裂,这些断裂应该形成于五大连池火山活动之前,并在火山作用过程中为岩浆提供了向上运移的通道,从而形成了现今的地表火山分布,即三组火山沿NE向断裂排布,两组火山沿NW向断裂分布,两组火山沿近E-W向断层排布。

【Abstract】 The Wudalianchi National Park is located in Heilongjiang province,northeastern China,where the volcanoes are the best examples of the intra-continental monogenetic volcanoes in the world.There are also numerous faults developed in the volcanic strata.If the relationship between the fault system and the distribution of volcanoes in the area could be well analyzed and interpreted,it would be of great importance for understanding the evolution of volcanic activities of this kind.Research work shown in this article is done to study the correlativity between distribution of the intra-continental monogenetic volcanoes in Wudalianchiare and the local fractures.From ground surface observation and remote sensing image interpretation,together with the study on regional structure,falults and fault zone outcroping,volcanoes erupting sequence(such as the fact that some volcanoes erupted regularly in turns,progressively from SW to NE),regional profiles and paying attention to the fact that volcanoes in different spreading directions are of different scales,we come to the conclusion that the 7 faults discovered in the area actually belong to three faults groups.The strikes of these three groups are NE,NW and nearly E-W,respectively.Regional electromagnetic data and previous research on deep structure in northeastern China also give support to the view.Fractures of these three strikes appeared in granites temporally formed before the volcanic activies in time.Seismic data,stress state in geological history,as well as study on river terraces,all demonstrate that there were no active fractures taking place during volcanic eruption period in the area.Cusequently,the fractures should exist prior to the volcanic activities in Wudalianchi area.At the times of volcanic eruptions,the faults provided pathways for the underground magmas to migrate upward towards surface,and finally led to forming this kind of volcano distribution seen nowadays on ground surface in Wudalianchi area.It means fhat three groups of volcanoes are distributed along the NE trending faults,two groups along the NW trending faults,and the other two groups nearly E-W trending.

【基金】 国家重点基础研究发展计划“973计划”(2009CB219302)项目资助
  • 【文献出处】 高校地质学报 ,Geological Journal of China Universities , 编辑部邮箱 ,2010年02期
  • 【分类号】P317
  • 【被引频次】14
  • 【下载频次】615
节点文献中: 

本文链接的文献网络图示:

本文的引文网络