新疆卡拉麦里区域重力场特征与金矿化作用  

Regional gravity field and orogenic gold system of kalamaili Belt,Xinjiang

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作  者:闫晓兰 

机构地区:[1]新疆维吾尔自治区矿产资源储量评审中心,乌鲁木齐830001

出  处:《地球物理学进展》2014年第2期846-852,共7页Progress in Geophysics

摘  要:研究表明,卡拉麦里构造带为新疆北部的一条大型断裂带,同时也是区域性金矿成矿带.区域重力测量指示该带总体上为一条高重力异常带,重力高的诱因很可能是超基性蛇绿混杂岩带存在引起的.本地区金矿化作用,主要受古生代洋壳消减与后续增生碰撞造山事件所形成的韧性剪切带控制,因而是一个典型的造山型金矿系统.由于造山型金矿系统具有成矿深度大、构造控制突出、二维延伸稳定等特点,预示卡拉麦里金矿带的深部应具有可观的资源潜力.The Kalamaili ductile shear zone is a regional northwest-trending fault belt, and also a huge gold metallogenic belt as well, in the northern Xinjiang.The regional gravity survey indicates that the gold belt is a high positive gravity anomaly zone, which is coincidental with the sheared ultramafic ophiolitic belt. Gold mineralization and localization are mainly controlled by ductile shearinginduced by the Paleozoic accretionary and/or collisional orogenic events in the region. Thus gold deposits hosted within Kalamaili shear zones are typical of orogenic gold systems with the inherentattributes including large mineralized depths, robust structural controls, steadystrike and dipping extensions of ore shoots, which imply that the Kalamaili gold belt has a great resource potential in depths.

关 键 词:新疆 东准格尔 卡拉麦里 区域重力高 韧性剪切带 造山型金矿系统 

分 类 号:P631[天文地球—地质矿产勘探]

 

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