蚌埠-凤阳地区构造格架与找矿方向研究

在蚌埠-凤阳浅覆盖区，依据重磁异常进行地质构造解释，基本查明了构造格架，确定了新的找矿方向。研究结果表明，蚌埠复背斜构造轴线为向南凸出的弧形，西部地区走向北西西，与蚌埠隆起构造线一致，中部凤阳县城地区走向近东西，东部地区走向北东。郯庐断裂构造的左行牵引作用是引起轴线变化的主要原因。由此圈定了蚌埠岩体隐覆边界线和凤阳县-总铺构造岩浆热液活动带范围。编制了蚌埠-凤阳地区物探推断基岩构造纲要图。提出了蚌埠岩体接触带、构造岩浆热液活动带和重要断裂带交汇部位为找矿有利地区，为该区指明了找矿方向。

Studying on the tectonic system and the orientation of prospecting of Bengbu-Fengyang area

On the shallow covered area of Bengbu-Fengyang, we explained the geological construction using the gravity and magnetic anomalies, and ascertained the tectonic system. We deemed that the Bengbu anticlinorium is outstanding southward. The trend identical with the Bengbu upwarping tectonic line is NEE direction on the west area. The trend is near E-W direction in the Fengyang County, which is in the middle of the area. On the east area, the trend is NE-trending. The left-lateral tractive effects of Tanlu fault zone is the main reason of the axis changing. We determined the hidden boundary of the Bengbu rock mass and the range of the Fengyang-Zongpu tectonic magmatic hydrothermal zone, and drew the map of the Bengbu-Fengyang area geophysics deducing bedrock tectonic outline. It is suggested that the intrusive contact zone of the Bengbu rock mass, the tectonic magmatic hydrothermal activity and the intersections of the important fault zones are the favorable prospecting zone. The prospecting direction is put forward.