A STUDY ON THE BALANCED SECTION OF YANSHAN AREA
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摘要: 本文在深入分析燕山地区区域地质背景和地壳表层结构的基础上,确定了中生代构造形变平衡剖面计算的准则和主要滑脱层,对区内3条主要构造剖面进行了平衡计算,并运用各种尺度的多种应变测量数据对计算结果进行了有效核查,得出燕山造山带印支期SN方向缩短率为27.9%,燕山期缩短率为10.9%,较为准确地描述了燕山造山带中生代构造形变的面貌Abstract: Based on the detailed study of the regional geological setting as well as the supracrustal structure in the Yanshan area, we have shown what should be followed in calculating the balanced section of the Mesozoic deformation and determined the main decollement surfaces.Three main balanced sections have been constructed.The results are checked by various data of strain measurements.As a result, we have a shortening of 27.9% of the Yanshan orogen during the Indosinian and 10.9% during the Yanshan Movement of the giving a more accurate description of the Mesozoic deformational features of the area.
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Key words:
- the Yanshan area /
- Mesozoic /
- balanced section
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