湘西大庸上震旦统灯影组震裂角砾岩
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摘要
湘西大庸上震旦统灯 影组中碳酸盐 岩震裂角砾岩 垂向序列由 ５ 个层段组成，自 下而上分别为： 下伏未震层段、裂缝层段、微褶曲层 段，、角砾岩层段及上覆未震层段。一个垂向序列代表了一次地 震灾变事件。与已有的标准序 列比较，缺乏液化均一层段，这可能反映 了固结程度较高的较刚性岩体的破 裂机理。震裂角砾岩是一种较好的 储集岩体，以发生地震的断裂系统 为中心，组成向两则储集岩 体尖灭的岩性圈闭类型。
The vertical succession of carbonate rock's shattered breccia in the Upper Sinian Dengying Formation of Dayong, West Hunan province consists of five layers, from bottom to top including the underlying unshocked layer, the fissure layer, the microfold layer, the breccia layer and overlying unshocked layer. A vertical succession represents a seismic catastrophic event. It lacks liquefied homogeneous layers compared with the preexisting normal succession. This may reflects the fracturing mechanism of the more rigid rock body with higher solidification degree. Shattered breccia is a kind of better reservoir rock body. Centered on the fracture systems where earthquake took place, it forms a lithologic trap type thinning out towards bilateral reservoir rock body.
The vertical succession of carbonate rock's shattered breccia in the Upper Sinian Dengying Formation of Dayong, West Hunan province consists of five layers, from bottom to top including the underlying unshocked layer, the fissure layer, the microfold layer, the breccia layer and overlying unshocked layer. A vertical succession represents a seismic catastrophic event. It lacks liquefied homogeneous layers compared with the preexisting normal succession. This may reflects the fracturing mechanism of the more rigid rock body with higher solidification degree. Shattered breccia is a kind of better reservoir rock body. Centered on the fracture systems where earthquake took place, it forms a lithologic trap type thinning out towards bilateral reservoir rock body.
引文
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[2] Seilacher A . Sedim en tary structu res ten tatively attributed tosesm ic events[ J]. M arine Geology , 1984,55:1～12
[3] 吴贤涛, 尹国勋 四川峨眉晚侏罗世湖泊沉积中 震积岩的发现及其意义 [ J]沉积学报,1992,10( 3):19～25
[4] 乔秀夫, 宋天锐,高林志,等 碳酸盐岩振动液化 地震序列[ J]地质学报 ,1994,68(1):16～33
[ 5 ] R icci Lu cch i F an d V alm ori E . Basinw ide turbidites in a M iocene, oversu pplied deepsea plain a geom etrical analysis[ J]. Sedim entology, 1980,27:241～270
[ 6] 孟宪梁,于 慎谔,奚云 山 西洪洞 8 级地震形 变遗迹研 究[ J]地震地质,1985,7(4):1 ～10
[7] 赵根模, 王岩柏,刘玉田,等 远古时代京津塘地 区一次大地震研究[ J]地震地质,1989,11(2):1 9～25
[ 8] 冯先 岳 地 震振 动液 化变 形的 研 究[ J] 内 陆 地震, 1989, 3(4):209～307
[9] 刘颖,谢 君斐 沙土震动液化[ M ]北 京:地震出版社,1984
[10] 郭令智 ,等 华南大地构造和地壳演化[ A ]国 际交流地质学术论文 集[ C]北京:地质出版社,1980
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