扬子西缘东吴伸展运动
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摘要
扬子西缘二叠系中震积岩十分发育,笔者根据震积岩、震积—伸展不整合的存在,厘定了它的时代,确认了东吴运动的存在。指出它是该区晚古生代以来最重要的一次伸展构造事件。多旋回震积岩、化石有序混积与水下边界正断层的多次活动有关。在木里地区,从东吴运动开始,地震、伸展—裂陷;火山活动持续到三叠纪,形成裂陷槽（晚二叠世—早三叠世达到高峰）。在这里,东吴运动实际是裂陷造槽运动。
Permian seismites are well - developed along the western margin of the Yangtze region. Their presence together with the extensional seismic unconformity have enabled the authors to determine their age and the existence of the Dongwu movement, and to demonstrate also that in the region concerned a significant extensional structural event had taken place by the end of the Palaeozoic. The multicyclothemic seismite, and "the orderly - disposed fossils within mixed deposits" are related to frequent normal faulting at submarine border. In the Muli area earthquakes, extensional depressions, and volcanism had persisted since the beginning of the Dongwu movement and resulted in ruptured depressions ( reaching its climax by Late Permian - Early Triassic),It is there that the Dongwu movement is practically a depression movement.
Permian seismites are well - developed along the western margin of the Yangtze region. Their presence together with the extensional seismic unconformity have enabled the authors to determine their age and the existence of the Dongwu movement, and to demonstrate also that in the region concerned a significant extensional structural event had taken place by the end of the Palaeozoic. The multicyclothemic seismite, and "the orderly - disposed fossils within mixed deposits" are related to frequent normal faulting at submarine border. In the Muli area earthquakes, extensional depressions, and volcanism had persisted since the beginning of the Dongwu movement and resulted in ruptured depressions ( reaching its climax by Late Permian - Early Triassic),It is there that the Dongwu movement is practically a depression movement.
引文
1 尹赞勋,徐道一,浦庆余.中国地壳运动名称资料汇编.地质论评,1965,23(增刊):52～53
2 张祖圻.论东吴运动.煤田地质与勘探,1983,3:14～21
3 冯少南.东吴运动新认识.现代地质,1991,5（4）:378～384
4 罗志立,金以坤,朱药玉等.试论上扬子地台的峨嵋地裂运动.地质论评,1988,34(1):11～24
5 四川地矿局.四川地质志.北京:地质出版社,1991
6 梁定益,聂泽同,万晓樵等.试论震积岩及震积不整合——以川西、滇西地区为例.现代地质,1991,5（2）:138～146
7 四川地质局区域地质调查队.川西藏东地区地层与古生物.成都:四川人民出版社,1982
8 Austin R L.Evidence from Great Britain and Ireland coneerning West European Dinatian conodont paleoecology.In:Barnes.ed.Conodont Paleoeclology.[s.1.]:Geol ASSO Canada Spec 1976.15
9 夏帮栋,钟立荣,方中等.下扬子区早二叠世孤峰组泥化火山岩.地质论评,1994,40（1）:64～73
①地质部华北地质科学研究所第一研究队.四川盐源东部石炭二叠纪地层划分与对比,1966
②Luguhuphyllum为一新属,是一种具泡沫板与3条隔壁的复体珊瑚.鉴定者何心一教授认为与他在秦岭上二叠统中发现的Cystotrilasma一属特征相同,唯后者是单体.
③资料来源:水洛放射虫硅质岩.见:贡岭幅 1/20万区调报告,康乌梁子早三叠世放射虫 Wangia.n.sp.据冯庆来,1994
2 张祖圻.论东吴运动.煤田地质与勘探,1983,3:14～21
3 冯少南.东吴运动新认识.现代地质,1991,5（4）:378～384
4 罗志立,金以坤,朱药玉等.试论上扬子地台的峨嵋地裂运动.地质论评,1988,34(1):11～24
5 四川地矿局.四川地质志.北京:地质出版社,1991
6 梁定益,聂泽同,万晓樵等.试论震积岩及震积不整合——以川西、滇西地区为例.现代地质,1991,5（2）:138～146
7 四川地质局区域地质调查队.川西藏东地区地层与古生物.成都:四川人民出版社,1982
8 Austin R L.Evidence from Great Britain and Ireland coneerning West European Dinatian conodont paleoecology.In:Barnes.ed.Conodont Paleoeclology.[s.1.]:Geol ASSO Canada Spec 1976.15
9 夏帮栋,钟立荣,方中等.下扬子区早二叠世孤峰组泥化火山岩.地质论评,1994,40（1）:64～73
①地质部华北地质科学研究所第一研究队.四川盐源东部石炭二叠纪地层划分与对比,1966
②Luguhuphyllum为一新属,是一种具泡沫板与3条隔壁的复体珊瑚.鉴定者何心一教授认为与他在秦岭上二叠统中发现的Cystotrilasma一属特征相同,唯后者是单体.
③资料来源:水洛放射虫硅质岩.见:贡岭幅 1/20万区调报告,康乌梁子早三叠世放射虫 Wangia.n.sp.据冯庆来,1994
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