钟姑地区典型矿床的重磁找矿模式

钟姑地区位于宁芜中生代火山岩盆地南段,已发现有白象山铁矿等多个大型铁矿,是长江中下游成矿带以玢岩型铁矿为主的矿集区。本文以钟姑地区实测岩石物性参数为桥梁,以实测重磁数据为基础,分析了该区白象山铁矿、钟九铁矿和云楼铁矿的重磁场分布特征,并根据典型矿区已知地质条件,运用成熟的2.5D重磁联合反演技术进行计算,从定量角度认识铁矿体深部发育形态、位置与重磁异常之间对应关系,建立钟姑地区白象山铁矿等典型矿床的重磁找矿模式,为该区进一步找矿突破提供地球物理场信息。

GRAVITY-MAGNETIC ORE-PROSPECTING MODEL FOR TYPICAL DEPOSITS IN THE ZHONGGU AREA

The Zhonggu area lies in the southern part of the Ning-Wu Mesozoic volcanic basin, and is home to a number of known large iron ore deposits like the Baixiangshan iron ore deposit serving as a major porphyrite iron ore concentration zone in the mid-lower Yangtze River metallogenic belt. This paper, with measured petrophysical parameters of the area as bridge, and measured gravity and magnetic data as basis, analyzed the features of gravity and magnetic fields in the Baixiangshan, Zhongjiu and Yunlou iron ore deposits of the area, based on known geological conditions in typical ore districts, applied mature technology of 2.5D joint inversion of gravity and magnetic data in calculation to quantitatively understand the relations between deep development form, location of iron ore body and gravity and magnetic anomalies, built up a gravity-magnetic ore-prospecting model of typical ore deposits like the Baixiangshan iron ore deposit in the Zhonggu area, providing geophysical field information for further breakthrough in ore exploration in the area.