基于Tilt导数方法在磁异常解译推断构造中的应用

Application of Tilt derivative method in magnetic anomaly interpretation and inference construction

研究区处于铜金铅锌多金属成矿带,矿床类型主要为与燕山早期Ⅰ型中酸性次火山岩、斑岩有关的铜钼铅锌矿床,受构造控制作用明显。通过对研究区的磁测数据进行Tilt导数及其水平导数计算,深入研究划定了区内断裂构造格架,提取与成矿关系密切的断裂构造位置、走向等地质信息。为区内盖层下找铜金多金属矿,圈定成矿有利地段提供了丰富的地球物理信息。

The study area is located in the copper,gold,lead-zinc polymetallic metallogenic zone,and the main types of deposits are copper molybdenum lead zinc deposits related to Type I medium acidic subvolcanic rocks and porphyry in the early Yanshanian,which are under obvious tectonic control.By calculating the Tilt derivative and its horizontal derivative of magnetic survey data of the study area,the fault structure lattice in the area is delineated,and the geological information of the position and direction of the fault structure closely related to mineralization is extracted.It provides rich geophysical information for finding copper and gold polymetallic ore under the cover layer and identifying the favorable areas for mineralization.