T破裂在断层运动学和区域构造成矿中的应用  

The Application of T Fracture in Fault Kinematics and Regional Tectonic Mineralization

作　　者：胡信 田荣松 胡江 HU Xin;TIAN Rong-song;HU Jiang(Team 174,Guizhou bureau of coalfield geology,Guiyang 550000,Guizhou,China;Resource and Environmental Engineering College,Guizhou University,Guiyang 550025,Guizhou,China)

机构地区：[1]贵州省煤田地质局174队,贵州贵阳550000 [2]贵州大学资源与环境工程学院,贵州贵阳550025

出　　处：《贵州地质》2024年第3期235-240,共6页Guizhou Geology

基　　金：贵州省地勘资金项目“黔西南地区页岩气重点层系勘探评价与工程实践”(编号:520000024P0048BH1017M)资助。

摘　　要：断层运动学及区域地球动力学背景是野外构造地质调查的重要内容,同时也是区域构造变形与成矿研究的关键。由于地质历史时期多期次构造变形叠加改造,断层运动学性质需要结合多重地质手段相互印证。走滑断层在相对运动过程中形成各种类型次级破裂,其中T破裂倾向代表对盘运动方向,在判别构造运动方向方面最可靠。此外,T破裂与区域主压应力方向平行可以有效指示区域主应力方向,因此可以作为判别区域断层运动性质的重要证据之一。本次研究在大量的野外构造地质调查基础上,结合其他断层运动学标志,初步总结野外利用T破裂判别贵州古生代-中生代地层中发育的断层并有效揭示这些断层运动性质。结合T破裂与主剪切破裂力学性质和几何学特征总结了T破裂在区域构造控矿分析中的应用。Fault kinematics and regional geodynamic setting is an important part of field geological investigations,as well as the key to study regional tectonic deformation and mineralization.Due to the superimposed tectonic deformation during the geological history period,the kinematic properties of faults need to be confirmed by multiple geological evidence.Strike-slip faults developed various types of secondary ruptures during the relative movement of the Fault plane,among which the T-rupture tendency represents the direction of the opposite plate movement,which is the most reliable in determining the direction of tectonic movement.In addition,the T rupture parallel to the regional principal compressive stress direction can effectively indicate the regional principal stress direction,so it can be used as one of the important evidences to determine the nature of regional fault movement.In this paper,based on a large number of field tectonic geological investigations,combined with other fault kinematic signatures,a preliminary summary of the field use of T-rupture to identify faults developed in the Paleozoic-Mesozoic strata of Guizhou and to effectively reveal the nature of the movement of these faults is presented.The application of T-rupture in the analysis of regional tectonic control is summarized by combining the mechanical properties and geometrical characteristics of T-rupture and main shear rupture.

关 键 词：T破裂 断层动力学 运动学特征 区域成矿 

分 类 号：P54[天文地球—构造地质学] P612[天文地球—地质学]