新疆东昆仑-阿尔金地区航磁反映的断裂构造特征

doi:10.13278/j.cnki.jjuese.20170273

摘要/Abstract

摘要： 本文根据最新的航磁资料，将东昆仑-阿尔金山地区按照不同的磁异常面貌特征进行了分区描述，其总体展布以北东和近东西向为主，磁异常具有明显的分区、分带性。同时辅以卫星重力资料，通过解析延拓、任意水平方向导数计算等处理，得到大量与断裂相关的地球物理场信息，并结合地质资料综合分析，揭示了研究区内断裂构造尤其是深大断裂在磁场上的特征。这些特征主要以不同磁场分界线、磁异常梯度带和串珠状异常等形式呈现，明显的表现为磁场分区、分带的界线。在此基础上，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。本文实例揭示已知的中小型矿床多位于深大断裂附近。

关键词: 高精度航磁, 断裂构造特征, 东昆仑, 阿尔金南缘断裂

Abstract: The latest high-precision aeromagnetic data is used to interpret the regional magnetic characteristics of the East Kunlun-Altyn Tagh area in the light of the different magnetic anomalies, which strik generally in NE and nearly EW, and remarkable for their obvious partitioned and segmented features. With the assistance of the Satellite gravity data and the processes of the analytic continuation and horizontal derivative, the geophysical and geological data revealed the magnetic anomaly of the fault structure, especially the deep fracture. The magnetic anomaly is mainly characterized by the boundary, gradient zone, and beaded anomalies. The faults act not only as the important tectonic boundaries in this region, but also the important tectonic belts, controlling the distribution of mineralization. Based on the magnetic interpretation and practical applications, we described the relation between the deep fracture and mineralization. In the East Kunlun-Altyn Tagh region, many known medium and pint-sized deposits are located nearby the deep fractures.

Key words: high-precision airborne magnetic, fault structure features, East Kunlun, Altyn Tagh south rim fracture

中图分类号:

P631.2

朱晓颖, 杨海, 匡星涛, 彭巍巍, 张洪瑞. 新疆东昆仑-阿尔金地区航磁反映的断裂构造特征[J]. 吉林大学学报(地球科学版), 2018, 48(2): 461-473.

Zhu Xiaoying, Yang Hai, Kuang Xingtao, Peng Weiwei, Zhang Hongrui. Characteristics of Fault Structures in East Kunlun-Altyn Tagh Based on High-Precision Aeromagnetic Data[J]. Journal of Jilin University(Earth Science Edition), 2018, 48(2): 461-473.

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