天子山复式岩体深部岩性界面识别及找矿方向

Deep Lithological Boundaries Discrimination and Prospecting Direction of Tianzishan Complex Rock

西秦岭天子山复式岩体为李子园—高桥多金属矿集区重要控矿岩体。为识别该岩体深部不同岩性界面,针对其多场源叠加效应导致场源难以分离问题,通过采用小波多尺度分解技术实现不同岩性场源分离及岩性界面识别,并在分析成矿与岩浆活动关系及航磁异常特征的基础上,提出找矿方向新认识。结果表明,该复式岩体由花岗岩、闪长岩及基性岩等3种岩性构成,为成矿提供直接热源及物源,岩性界面是定位成矿空间场所的重要要素,所圈定的6片找矿有利区应在深部勘查选区中给予优先关注。

Tianzishan Complex Rock is the important ore-controlling rock in Liziyuan and Gaoqiao polymetallic ore concentration area in Western Qinling.In order to discriminate deep lithological boundaries of the rock,and separate the field sources due to the superposition effect of multiple field sources,wavelet multi-scale decomposition is used to solve the problem.Based on the analysis of the relationship between mineralization and magmatic activity and the characteristics of aeromagnetic anomalies,the new understanding of prospecting direction is put forward.The results show that the Tianzishan Complex Rock is composed of granite,diorite and mafic rock,these rocks provide direct heat source and material source for mineralization,deep lithological boundaries are important factor to locate the metallogenic site.Six prospecting areas are delineated,and it is suggested that priority should be given to deep exploration.