PROGRESS IN RESEARCH ON ROTATION-SHEAR STRUCTURE
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摘要: 文章综述了中国地质学家对旋扭构造研究的历史与成果,也介绍了国外相关研究成果。李四光先生通过四篇论著奠定了旋扭构造的理论基础。在后来的研究和找矿实践、多种模拟仿真新方法试验以及力学解析中进一步丰富了旋扭构造的研究内容,深化了对旋扭构造几何学、运动学特征与动力学机制等的认识,提出了有些旋扭构造是螺旋运动的结果及旋扭构造的形成很可能与地球旋转动力问题有关;特别是在找矿勘探方面取得的成功和经济效益,提高了成矿理论认识的水平。文章最后提出今后研究旋扭构造应注意的问题。Abstract: This paper reviews the history and progress of geomechanics research on rotation-shear structure in China. It also reflects the relevant research results abroad. J.S.Lee laid the theoretical foundation of rotation-shear structure through four theses. The subsequent research and ore-prospecting practice, as well as a variety of new methods for simulation tests and mechanical analysis, further enrich the research contents of rotation-shear structure, deepen the understanding on rotation-shear structure geometry, characteristics of kinematics and dynamics mechanism, proposing the idea that some rotation-shear structures are the results of spiral motion, and the formation of rotation-shear structure is likely to be related to the Earth rotation dynamics. Especially the success and economic benefit achieved in prospecting and exploration have improved the understanding on metallogenic theory. Finally, the paper puts forward the problems that should be paid attention to in the future study of the rotation-shear structure.
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1—以扭性为主的弧形断裂;2—背斜和向斜轴线;3—推测背、向斜轴线;4—张性兼扭性断裂;5—轴近水平的小旋扭构造及其倾伏方向和外旋层扭动方向;6—扭或张扭性断层;7—横断层;8—低角度逆掩断层;9—高角度冲断层;10—地质界线;11—标志层界线;12—地层产状;13—第四系;14—杨家屯煤系(包括清水涧组);15—下、中奥陶统灰岩;16—上寒武统;17—中寒武统;18—下、中寒武统;19—景儿峪组;20—下马岭组;21—铁岭组灰岩;22—高于庄组灰岩;23—前震旦纪变质岩系;24—花岗闪长岩(γδ)或花岗岩(γ);25—石英斑岩
Figure 2. Rotation-shear structure map of the Niukouyu region[5, 8]
1—第四系;2—长辛店组;3—九龙山组;4—龙门组;5—窑坡组;6—南大岭组;7—双泉组;8—红庙岭组;9—下石盒子组及山西组;10—太原组及本溪组;11—马家沟组;12—亮甲山组—冶里组;13—上寒武统;14—中寒武统;15—下寒武统;16—景儿峪组-长龙山组;17—下马岭组;18—铁岭组;19—洪水庄组;20—雾迷山组;21—大洪峪组;22—团山子组;23—串岭沟组;24—常州沟组;25—太古宇;26—花岗闪长岩;27—石英闪长岩;28—断层;29—岩层产状
图 15 河北邯邢矿山村构造草图[13]
1—二叠系;2—石炭系;3—中奥陶统;4—闪长岩-二长岩类;5—闪长岩类;6—背斜(实测与推断);7—向斜(实测与推断);8—压性与压扭性断层;9—剪切劈理;10—性质不明及推断断层;11—石板坡-马家脑环形褶皱带;12—西四门挤压带;13—白露寺-全呼帚状构造束;14—矿山村褶皱;15—五家子弧形侧转向斜;16—玉石洼弧形褶皱群;17—北各河弧形向斜;18—燕山弧形褶皱群;19—上焦寺帚状褶皱群;20—锁会“螺线”式中小型旋扭构造;21—王窑反“S”型旋扭构造;22—岩体流线;23—剖面;24—铁矿床
Figure 15. Skech map of structures of Han-Xing Iron Mine[13]
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