| 北京密云北石城断裂带的断层岩特征及其地震事件的可能证据 |
| |
| 引用本文： | 杨主恩,应思淮,林传勇,俞理宝. 北京密云北石城断裂带的断层岩特征及其地震事件的可能证据[J]. 地震地质, 1981, 3(4): 1 |
| |
| 作者姓名： | 杨主恩 应思淮 林传勇 俞理宝 |
| |
| 作者单位： | 国家地震局地质研究所(杨主恩，应思淮，林传勇)，国家地震局地质研究所(俞理宝) |
| |
| 摘 要： | 通过对北京密云北石城断裂带的野外和室内工作,该断裂带的断层岩可分为四种类型:碎裂岩类、糜棱岩类、假熔岩和断层泥。它们具有不同的矿物学、形变和组构特征,分别代表不同的成因机制。假熔岩和碎裂岩类断层岩的存在,可作为古地震事件的可能证据。前者是地震断层运动在断层面上摩擦增温,引起围岩中矿物的选择性熔化形成的。在该断裂带中可能发生不止一次的古地震事件。断层岩特征和产状表明,该断裂带经历了两种不同力学性质的运动,早期为韧性剪切;晚期为脆性破裂,并伴有地震发生
|
| 关 键 词： | 假熔岩 断层岩 断裂带 石城 超碎裂岩 糜棱岩 地震事件 北京密云 脆性破裂 围岩 |
CHARACTERISTICS OF FAULT ROCKS AND THEIR POTENTIAL EVIDENCES FOR SEISMIC EVENTS |
| |
| Abstract: | It has been found from field observation and laboratory study that the fault rocks on the Beishicheng fault zone in Miyun region, Beijing can be classified into four main types: cataclasite series, mylonite series, pseudotachylite and fault gouge. They have distinct features in mineralogy, deformation and microfabric, representing the different mechanisms of their origin. It is shown by the features and occurrences of the fault rocks in this region that the fault zone had experinced two stage of |
| |
| Keywords: | |
| 本文献已被 CNKI 等数据库收录！ |
|
