鞍山—本溪地区太古宙结晶基底埋深

Buried depth of Archean crystalline basement in Anshan-Benxi area

利用鞍山—本溪地区1∶20万重力资料及航磁资料、钻孔数据,结合实测岩石密度数据,采用地质剖面约束下的二维人机交互反演方法,完成了14条剖面的深部地质结构反演,确定了太古宙结晶基底的埋深。鞍山—本溪地区结晶基底的最大埋深约为4 500 m,在下辽河盆地埋深最大;埋深较浅的地区主要位于本溪市以南地区。推测在田师付镇和平顶山镇以南可能存在隐伏铁矿。

This paper analyzes the data of gravity and magnetic anomaly field in scale of 1∶ 200 000,borehole and measuring density in Anshan-Benxi area. Through the method of 2-D human-computer interactive inversion under the geological section data constraints,the authors complete the deeply geological structural inversion of 14 profiles. The inversion results confirm the constitution of Archean crystalline basement in Anshan-Benxi area,in which the maximum buried depth is about 4 500 meters in Xialiaohe Basin,while the shallow area of the buried depth is located in the south of Benxi City. In speculation,Tianshifu town and south of Pingdingshan town may have concealed iron ore.