尼勒克断裂航磁特征及其地质意义  

Aeromagnetic characteristics of the Nileke fault and its geological significance

作　　者：张玄杰[1] 张婉[1] 范子梁[1] 郑广如[1] 

机构地区：[1]中国国土资源航空物探遥感中心,北京100083

出　　处：《地球物理学进展》2016年第1期152-158,共7页Progress in Geophysics

基　　金：航空物探调查成果集成与综合(1212011087011);国家专项(GZH200900502)联合资助

摘　　要：在最新的高精度航磁图上,尼勒克断裂表现为一条重要的区域磁场分界线,断裂两侧区域场及局部异常分布均明显不同.通过对尼勒克断裂磁场特征的分析,认为其在地质上具有重要的构造控制作用,它不仅控制了基底的分布,同时也控制了岩浆活动的发育,是伊犁地块和伊犁地块北缘活动陆缘之间的界线.同时,尼勒克断裂与阿吾拉勒铁矿带铁矿床的形成有着密切的关系,是一条重要的控矿断裂.沿该断裂带目前已发现了松湖、松湖南、查岗诺尔、智博冰川、备战、尼新塔格、雾岭、敦德等多处铁矿,预测资源量在20亿吨以上.The Nileke fault is one of the most faults in Xitianshan delineated with aeromagnetic data. The magnetic anomaly of Nileke fault is very obvious in the latest high precision aeromagnetic map.On both sides of the fault,the magnetic field and the local abnormal distribution are significantly different. The magnetic characters shows that Nileke fault dominates the distribution of basement. The south side of Nileke fault is strong magnetic Archaean- Proterozoic crystalline basement, and the north side of the fault is weakly magnetic Proterozoic metamorphic basement. From the tectonic sense,Nileke Fault is the boundary of the Yili Northern Active Continental Margin and the Yili Block. On the other hand,Nileke Fault is an important ore controlling fracture. Its distribution has close relationship with the Awulale iron ore belt. Because the formation of iron ore is related to the activity of the magma,they can be reflected in the aeromagnetic map. Along the fault,Songhunan,Nixintage,Wuling and Dunde iron ore have been found with high precision aeromagnetic data. The resource reserves of the known iron ore have been expanded,such as Chagang,Zhibo,Beizhan etc. Now,the predicted resources of Awulale iron ore belt is 2billion tons or more.

关 键 词：尼勒克断裂 航磁特征 伊犁地块 阿吾拉勒 铁矿 

分 类 号：P631[天文地球—地质矿产勘探]