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智利是安第斯成矿带最重要的矿业国家之一,智利北部阿卡塔玛和东部多明戈断裂系统控制了智利自西向东迁移的构造—岩浆活动和成矿类型。本文对智利北部航磁数据进行网格化、化极、向上延拓、垂向二次导数、倾斜角以及解析信号振幅处理,并对处理结果进行解释,揭示了研究区沿北北东向和南北向区域性深大断裂构造的位置和平面分布特征,确定了自西向东近于平行的断裂构造和多次岩浆活动是导致构造—岩浆岩分带性的主要原因;查明了研究区火山机构的分布位置及其与深大断裂的关系;推断了基性—中基性和酸性火山岩层、侵入岩相以及沉积岩序列分布的空间范围;展示了在低缓的背景负磁异常场上发育了线性正磁异常和磁异常梯级带,反映了沿深大断裂产生了强烈的岩浆岩活动,揭示了铜、多金属成矿的有利区带,为智利北部地区的地质、构造特征研究以及找矿远景区的圈定提供了基础性信息。
Chile is one of the most important mining countries in the Andean metallogenic belt. Arcatamia in the north of Chile and the Domingo fault system in the east dominate the tectono-magmatic activity and ore-forming type of Chile’s migration from west to east. In this paper, the aeromagnetic data in the north of Chile are gridded, polarized, upward extended, vertical second derivative, tilt angle, and analyzed signal amplitude, and the processing results are explained. The results show that the north-north- The location and the plane distribution of the north-south regional deep fault structures confirm that the fault structure and multiple magmatic activities from west to east parallel to each other are the main causes of tectono-magmatism zonality. The location of the structure and its relationship with deep faults; the spatial range of basic-intermediate and acidic volcanic rocks, intrusive facies and sedimentary sequence distribution is inferred; The linear positive anomaly and magnetic anomaly cascades reflect intense magmatic activity along the deep faults, reveal favorable zones for copper and polymetallic mineralization, and study the geological and tectonic features of the northern Chile and prospecting The delineation of the prospects provides the basic information.