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1、构造地质研究方法主讲人：刘志宏吉林大学地球科学学院CollageofEarthSciences,JilinUniversity根据倾斜岩层产状要素编制岩层露头界线吉林大学地球科学学院CollageofEarthSciences,JilinUniversityCollageofEarthSciences,JilinUniversityLiuZhihong一、目的要求CollageofEarthSciences,JilinUniversity•LiuZhihong根据平整的岩层（矿层、断层）界面在某CollageofEarthSciences,JilinUniversity一点的产
2、状要素，用几何绘图法在地形图LiuZhihong上绘出该层界线的分布形态。CollageofEarthSciences,JilinUniversityLiuZhihong•通过作图，加深理解地质界线与岩层产状CollageofEarthSciences,JilinUniversityLiuZhihong和地形等高线间的关系，以便在野外合理CollageofEarthSciences,JilinUniversity填绘地质界线和布置探槽工程的位置。LiuZhihongCollageofEarthSciences,JilinUniversityLiuZhihongCollageof
3、EarthSciences,JilinUniversityLiuZhihongCollageofEarthSciences,JilinUniversityCollageofEarthSciences,JilinUniversityLiuZhihong二、内容CollageofEarthSciences,JilinUniversity•LiuZhihong（一）原理：在一层面平整、CollageofEarthSciences,JilinUniversity产状稳定的倾斜岩层层面上，可以作一系列相同等高距的不LiuZhihong同高度的走向线，这些走向线CollageofEarth
4、Sciences,JilinUniversity在平面上的投影为一系列间距LiuZhihongCollageofEarthSciences,JilinUniversity相等的平行线（图1），这些LiuZhihong投影线间的平距又叫放线距。CollageofEarthSciences,JilinUniversity在同比例尺图上，放线距与岩LiuZhihong层倾角成反比，倾角愈缓，放CollageofEarthSciences,JilinUniversity线距愈大，倾角愈陡，放线距LiuZhihong愈小。CollageofEarthSciences,JilinUnive
5、rsityLiuZhihongCollageofEarthSciences,JilinUniversityCollageofEarthSciences,JilinUniversityLiuZhihong（二）作图的方法步骤CollageofEarthSciences,JilinUniversity•LiuZhihong1、在地形图上，已知某一岩层面露头点A的产状要素。CollageofEarthSciences,JilinUniversityLiuZhihongCollageofEarthSciences,JilinUniversityLiuZhihongCollageofEa
6、rthSciences,JilinUniversityLiuZhihongCollageofEarthSciences,JilinUniversityLiuZhihongCollageofEarthSciences,JilinUniversityLiuZhihongCollageofEarthSciences,JilinUniversityLiuZhihongCollageofEarthSciences,JilinUniversityCollageofEarthSciences,JilinUniversityLiuZhihong2．按岩层产状求放线距CollageofEarth
7、Sciences,JilinUniversity（LiuZhihong1）计算法：a=h·ctgα，其中h为等高距，α为岩层倾CollageofEarthSciences,JilinUniversity角，得到的放线距a是实地水平距离，应按比例尺换算成图上的平距。LiuZhihongCollageofEarthSciences,JilinUniversityLiuZhihongCollageofEarthSciences,JilinUniversityLiuZhihongCollageofE
