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根据胶东地区西北部的重力资料 ,并在地质资料的约束下 ,采用人 -机联作的二维模拟方法 ,对玲珑花岗质杂岩体三维形态进行了细致的推断 .布格重力异常图与地质图的对比表明 ,本区的局部重力异常主要是由玲珑花岗质杂岩体引起的 .根据花岗岩体的二维特征 ,在其露头范围内 ,垂直其走向 ,选择一些均匀分布的重力剖面 ,以花岗岩露头位置作为其形态的地面约束 ,采用人 -机联作的二维重力模拟方法 ,求出了岩体的断面形态 .综合这些断面图 ,便可描述花岗岩体的三维形态 .从各个花岗岩体模型剖面图中 ,截取厚度值 ,可以绘制花岗岩体的厚度图 .模拟结果表明 ,玲珑花岗质杂岩体为一分布面积达 31 0 0km2 、最大厚度仅 8km的席状岩基 ,而不是过去一般所认为的无根岩基
According to the gravity data in the northwestern part of Jiaodong area and under the constraint of geological data, the three-dimensional shape of the Linglong granitoid complex body is carefully inferred by using the two-dimensional simulation method of man-machine linkage. The comparison with the geological map shows that the local gravity anomalies in this area are mainly caused by the Linglong granitoid complexs.According to the two-dimensional characteristics of the granite body, in the outcrop of the granite, Section, taking the position of the outcrop of granite as the ground constraint of its shape, the cross-section morphology of the rock mass is obtained by the two-dimensional gravity simulation method of man-machine linkage. Combining these sections, the three-dimensional shape of the granite can be described. In the section of each granite model, the thickness of the granite can be plotted by intercepting the thickness values.The simulation results show that the Linglong granitic complex is a sheet-like slate with a distribution area of 3100 km2 and a maximum thickness of only 8 km, Not the rootless rock found in the past