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一、问题的提出 在研究沉积岩中的节理时,对地层作复平图解后出现的直立或近直立产状的调整节理,一般称之为“初始节理”或“早期x节理”。所谓“初始节理”,往往强调这类节理的区域分布特征,因而采用大量的节理系统测量、统计方法;而所谓“早期x节理”,虽然强调了节理发生时剪裂的重要性,但具体研究过程中是以节理现存形迹的力学性质、交切关系、动向等为依据,是采用现场配套的选择测量、统计方法。在动力地质成因上,两者都同样假定:是一套连续的沉积地层在其建造之后,由某一期使这套沉积建造发生明显褶皱运动的初期产物。
I. PROBLEM PROBLEMS In studying the joints in sedimentary rocks, the adjustment joints of upright or near-erecting appearing after the leveling map are generally called “initial joints” or “early x joints.” The so-called “initial joint” often emphasizes the regional distribution characteristics of such joints and therefore uses a large number of joint system measurement and statistical methods. The so-called “early x-joint” emphasizes the importance of shear splitting when joints occur. However, The process is based on the mechanical properties of the existing joints of the joints, the relations of intercourse, and other trends as the basis, is the use of on-site selection of measurement, statistical methods. Both, in terms of dynamical geology, also assume the same: the initial product of a series of successive sedimentary formations that, after their construction, caused significant folding movements in the sediment from a certain period of time.