新疆阿尔金构造带长青铁矿地质特征  

Geological Characteristics of Changqing Iron Mine in Xinjiang

作　　者：邓广弘[1] 雷学武[1] 孙芳强[1] 

机构地区：[1]中国地质调查局西安地质调查中心,陕西西安710054

出　　处：《西北地质》2010年第4期188-194,共7页Northwestern Geology

基　　金：中央地质勘查基金项目(2007651139)

摘　　要：阿尔金构造带是我国西北地区的一个重要成矿带,成矿条件优越,在开展矿产调查中发现了长青铁矿。该铁矿位于阿尔金构造带的中西部,赋存于长沙沟超镁铁质岩中,其分布范围受超镁铁质岩的控制。为扩大找矿成果,继续寻找同类型铁矿,通过对矿区岩石组成、构造变形、矿化蚀变带分布特征、磁铁矿化蚀变带规模、分布及矿体的形态、产状、空间分布规律等矿体特征以及矿石质量特征、围岩特征的研究,总结出了该矿床属于岩浆晚期分异类型并受阿尔金断裂多期改造的特点,归纳了主要找矿标志,为在该区进一步寻找该类型铁矿提供了新的思路。Changqing iron mine,hosted by Changshagou ultramafic rock,is located in the central and western of Altun tectonic belt and its distribution is also controlled by ultramafic rocks.Based on the rock constitution,structural deformation,distribution of mineralization alteration zone,the scale and distribution of Magnetite alteration zone,and the morphology,occurrence,spatial distribution and other characteristics of ore body have been analzed;and the quality of ore and features of surrounding rocks have also been studied in this paper.It is concluded that the Changqing iron deposit is attached to a type of magma differentiation and has characteristics of the multi-stage transformation by the Altun fault;and then the main prospecting indications have been summarized;and,in conclusion,a new solution has been provided for prospecting the same type of iron ore in the region.

关 键 词：长青铁矿 地质特征 岩浆晚期分异 找矿标志 

分 类 号：P618.31[天文地球—矿床学]