Interpretation of geological structural terms
The term geological structure is interpreted as: crustal deformation and displacement caused by crustal movement. Such as folds and faults. It is the basis for studying the nature and mode of crustal movement.
geological structure (structure for short) is the general name of the forms of various components of the earth's crust or lithosphere, their mutual combination and features. It is a variety of structural features left by tectonic movement in rock strata and rock masses, such as rock folds and faults, which are called geological structures.
Tectonic movement is a kind of mechanical movement, involving the upper crust and upper mantle, that is, lithosphere, which can be divided into horizontal movement and vertical movement. The horizontal tectonic movement makes rocks separate and split from each other or converge towards each other, causing extrusion, bending or shearing and staggering. Vertical tectonic movement makes adjacent blocks rise or fall differently.
therefore, geological structures can be divided into primarystructures and secondarystructures according to their generation time. The secondary structure is the main object of structural geology research, while the primary structure is generally used as the benchmark to judge whether the rock is deformed and how it is deformed. Structures can also be divided into horizontal structures, inclined structures, faults and folds.
the general name for the forms of various components of the crust or lithosphere, their mutual combination modes and features. The scale of geological structures, thousands of kilometers, needs comprehensive analysis of geological and geophysical data and interpretation of remote sensing data to be identified, such as lithospheric plate structure.
Small ones, measured in millimeters or even microns, can only be observed by means of optical microscope or electron microscope, such as deformation of mineral grains and dislocation of crystal lattice. Guizhou is located in the South China plate, between the Mesozoic orogeny in East Asia and the Alps-Tethys Cenozoic orogenic belt, and spans two tectonic units: the Yangtze block and the South China active belt.
in the known geological history of 14Ma, it has experienced five stages: Wuling, Xuefeng, Caledonian, Variscan-Indosinian and Yanshan-Xishan. Xuefeng movement laid the foundation of the Yangtze landmass, Guangxi movement fused the fold uplift in southeastern Guizhou with the Yangtze landmass, and then experienced rifting and subduction, and Yanshan movement laid the basic structure of today's structure.