东南极南查尔斯王子山条带状含铁建造(BIF)的基本特征及成矿潜力  

Basic characteristics and metallogenic potential of banded iron formation(BIF)in the southern Prince Charles Mountains,East Antarctica

作　　者：李淼[1,2,3] 刘晓春 LI Miao;LIU Xiaochun(Institute of Geomechanics,Chinese Academy of Geological Sciences,Beijing 100081,China;Research Center of Polar Geosciences,China Geological Survey,Beijing 100081,China;Key Laboratory of Paleomagnetism and Tectonic Reconstruction,Ministry of Natural Resources,Beijing 100081,China)

机构地区：[1]中国地质科学院地质力学研究所,北京100081 [2]中国地质调查局极地地质研究中心,北京100081 [3]自然资源部古地磁与古构造重建重点实验室,北京100081

出　　处：《地质力学学报》2021年第5期759-767,共9页Journal of Geomechanics

基　　金：国家自然科学基金(41941004)。

摘　　要：东南极南查尔斯王子山条带状含铁建造(BIF)产于鲁克山古元古代鲁克群的底部,总厚400 m,矿体厚度30~70 m,铁矿平均品位33.5%。该条带状含铁建造形成过程可能与变质火山岩有联系,在成因分类上属于苏必利尔湖型含铁建造和阿尔戈马型含铁建造之间的过渡类型。高精度航磁测量在鲁克山圈定出宽约10 km的北、南两条磁异常条带,延长分别约为50 km和60 km。据此初步建立该地区沉积变质型铁矿预测模型,圈定了含铁建造的资源分布范围,最终估算出铁矿石可开采的资源量大于百亿吨。Banded iron formation(BIF)occurs in the lower part of the Paleoproterozoic Ruker Group at Mount Ruker,southern Prince Charles Mountains in East Antarctica.Of all depositional sequence of the Ruker Group,at least 400 m is of iron-bearing formation and 30~70 m is of ore body with an average grade of total Fe about 33.5%.The formation process of the BIF may be related to metamorphic volcanic rocks and the BIF may belong to the transitional type between the Lake Superior type and the Algoma type in genetic classification.High precision aeromagnetic survey identified two major,10-km-wide,positive aeromagnetic anomalies extending westward from Mount Ruker for 50 km in the north and 60 km in the south,respectively.Based on the aeromagnetic anomaly and high-precision magnetic anomaly data,the prediction model and the distribution range of the BIF are established.The recoverable iron ore resources are finally estimated to be more than ten billion tons.

关 键 词：条带状含铁建造 成矿潜力 南查尔斯王子山 东南极 

分 类 号：P618.31[天文地球—矿床学]