Geological Studies on Keluo Volcanic Cluster, Heilongjiang Province
详细信息
- 责任者：Zhang Liuyi (Key Laboratory of Active Tectonics and Volcano ; Institute of Geology ; China Earthquake Administration ; Beijing 100029 ; China) ; Li Ni
- 刊名：Seismology and Geology
- 出版年：2012
- 卷期：34(1)
- 关键词：火山 ; volcanoes ; 黑龙江省 ; Heilongjiang Province
- 页码：p.145-159
- 图表：8 illus., 2 tables, 17 refs.
- 分类号：1702
- issnNo：ISSN0253-4967
- isbnNo：CN11-2192/P
摘要
Keluo volcanic cluster,which covers an area of ca.350km2,is located between the Greater Khingan Mountains and the Songnen Plain,Heilongjiang Province,and in the north of the famous Wudalianchi volcanic cluster.Twenty-three Cenozoic volcanoes that primarily consist of alkaline basalts are distributed along the Keluo River.The activities and distribution of this volcanic cluster are largely controlled by the regional basement faults,and consistent with the special tectonic setting of NE-trending fault basin.The Strombolian-type central eruption is the predominant eruptive type in this area.Volcanic activities in this area can be divided into three periods,namely,Pliocene period,Pleistocene period and Holocene period.During the Pliocene,a series of central-overflow-type volcanoes,which situated on the edge of the basin,were formed along the NE-trending faults.However,except for some shield lava platforms,most of the original volcanic geomorphic features have been destroyed by weathering.The volcanic activities of early Pleistocene were relatively quiet.But the eruption activities of the Mid-and Late-Pleistocene were also controlled by the NE-trending basement faults,and the eruptive center,type and intensity were all changed as well.These volcanoes are mainly composed of alkali-basaltic scoria cones and lavas.The Holocene volcanoes,as represented by Nanshan,have similar eruptive type and composition to the former ones,but their volcanic structures are well preserved.Some micro-morphological characteristics can be easily recognized at their outcrops.On the whole,the lava covered the former sedimentary strata and changed the river flows attributed to the volcanic activities of Keluo volcanic cluster,as a result,the original geomorphy in the basin was totally altered.
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