长江三峡工程坝区线性构造及断裂系统研究  

RESEARCH ON LINEAR STRUCTURE AND FAULT SYSTEM IN THREE GORGES DAM AREA OF THE YANGZI RIVER

作　　者：李江风[1] 杨森楠[1] 韦必则 刘吉平 

机构地区：[1]中国地质大学

出　　处：《国土资源遥感》1998年第3期4-9,共6页Remote Sensing for Land & Resources

摘　　要：本文利用彩红外航片和野外调查等方法，对三峡大坝坝区的线性构造和断裂系统进行了解译，对断裂构造特征进行了解析，从中得出以下结论：坝区主要存在四组方向的断裂，即ＮＮＷ向、ＳＮ—ＮＮＥ向、ＮＷ—ＮＷＷ向以及ＮＥ—ＮＥＥ向断裂组，其中ＮＮＷ向断裂最为发育，ＮＥ—ＮＥＥ向断裂组次之。ＳＮ—ＮＮＥ向断裂组稍弱，ＮＷ—ＮＷＷ向断裂发育最弱。通过数理统计的方法，对网格单元内线性构造的长度、条数、断裂交汇点数进行了统计，分析总结了该区断裂分布之规律及其对坝区岩体质量和坝基稳定性的影响。此外，文中还利用矿物流体包裹体特征，对断裂形成时的温度（Ｔ）、压力（Ｐ）等物理环境和变形史进行了探讨。The paper uses color infrared remote sensing and field investigation technology to interpret linear structure and fault system in three gorges dam and explains the feature of the fault structure. From these analyses, it concludes that: there are mainly four groups fault in the area, that is : NWW group, SN-NNE group, NW-NWW group and NE-NEE group. NNW group is the best developed among them, NE-NEE group is the second developed, SN-NNE group is the third developed, NW-NWW group is the weakest developed. Through statistic method, the paper counts the linear structures length, quantity, fault cross point numbers in net unit and analyses the regular of the fault distribution in this area and their effect to rock quality and dam base stability. In addition to these, the paper also discusses the environment such as tempreture, pressure when the fault formed and formation history through using the feature of mineral fluid inclusion.

关 键 词：线性构造 断裂 流体包裹体 长江三峡大坝 

分 类 号：P642[天文地球—工程地质学] TV698.231[天文地球—地质矿产勘探]