CAJ | 학술논문

通过大比例尺航空照片、1：10000地形图及DEM图像研究和详细的野外调查，确定了兰州盆地各级阶地的分布状况。野外利用差分GPS实地测量了各级阶地海拔高度，据此得到了兰州盆地黄河两岸阶地纵剖面图。根据剖面图中阶地变形特点分析了兰州盆地活动构造特征，发现兰州盆地内活动构造以褶皱变形为主，断层多为褶皱隆起过程中的派生断裂，其活动性较弱。兰州盆地内变形的动力来源于西南方向马衔山北缘断层的左旋走滑。现有的地质资料也支持了这种观点。
통과대비례척항공조편、1：10000지형도급DEM도상연구화상세적야외조사，학정료란주분지각급계지적분포상황。야외이용차분GPS실지측량료각급계지해발고도，거차득도료란주분지황하량안계지종부면도。근거부면도중계지변형특점분석료란주분지활동구조특정，발현란주분지내활동구조이습추변형위주，단층다위습추륭기과정중적파생단렬，기활동성교약。란주분지내변형적동력래원우서남방향마함산북연단층적좌선주활。현유적지질자료야지지료저충관점。
According to large scale air-photos, 1:10 000 topographic maps, DEM maps and field investigations, the distribution conditions of terrace in Lanzhou Basin were confirmed. Differential GPS was used to measure the altitude of every level of terrace in the field. Based on the data, a terrace longitudinal map along the both sides of Yellow River in Lanzhou Basin was drawn. According to the terrace deformation features in the longitudinal map, active tectonic features in Lanzhou Basin were analyzed. The active tectonic in Lanzhou Basin was mainly folding deformation. Most of the faults were derived ones during the folding uplift when its activities were weak. The power of deformation in Lanzhou Basin came from the left-lateral strike slip of the north margin fault of Maxianshan located at southwest. The existing geological data also support this view.