新疆西天山东段航磁推断断裂构造特征

摘要

There are three deep faults in the aeromagnetic map of the Western Tianshan Mountains. These deep faults have very significant magnetic anomalies. They are not only the divisions of different tectonic units but also the important ore-controlling structure zones. In this paper, the authors deal with magnetic characteristics of the deep faults and the relationship between the deep faults and the mineralization. Nileke deep fault is one of the most important faults in this area. There are four large-size known iron ore deposits around Nileke deep fault. According to the latest high precision aeromagnetic survey, four anomalies have been proved to be related to the iron ore deposit. These anomalies are also located near Nileke deep fault.%在最新的高精度航磁图上,新疆西天山东段存在3条磁场特征十分显著深大断裂,它们不仅是区内重要的构造分界线,也是重要的控矿构造带.笔者以西天山东段最新高精度航磁资料为依据,论述了区内深大断裂的磁场特征,并根据航磁资料解释和实际应用结果对深大断裂与成矿的关系进行了探讨.区内沿着深大断裂分布有4处已知的大中型铁矿.根据最新航磁资料,又有4处推断铁矿异常被证实为铁矿的反映,它们也位于深大断裂附近.