冀东沉积变质型铁矿成矿规律及找矿方向  

Metallogenic Regularity and Prospecting Potential of the Sedimentary-Metamorphic Type Iron Deposits in Eastern Hebei Province

作　　者：崔伟[1] 董国明[1] 郑思光[1] 刘春来[1] 刘佳[1] 公凡影[2] CUI Wei;DONG Guoming;ZHENG Siguang;LIU Chunlai;LIU Jia;GONG Fanying(No.2 Geological Party,Hebei Bureau of Geology and Mineral Resources,Tangshan,Hebei 063000;Development and Research Center of China Geological Survey,Beijing 100037)

机构地区：[1]河北省地矿局第二地质大队,河北唐山063000 [2]中国地质调查局发展研究中心,北京100037

出　　处：《地质与勘探》2022年第5期989-1000,共12页Geology and Exploration

基　　金：中国地质调查局项目(编号:DD20190166-2020-13);河北省地质勘查资金项目(编号:13000022P0069B4100396)联合资助。

摘　　要：铁矿是重要的大宗金属矿产资源,冀东地区作为我国重要的钢铁基地面临着后备资源不足的问题,亟待深入开展冀东地区铁矿成矿规律和找矿方向研究。本文在近年来冀东地区找矿实践的基础上,利用勘查区找矿预测理论方法体系,系统归纳冀东铁矿床特征,共划分5个成矿区带,分析了本区鞍山式沉积变质型铁矿含铁建造、变质变形空间分带规律及控矿构造特征,并总结该地区矿床成矿规律。提出滦县滦南铁矿成矿区带成矿构造受背形和断裂构造共同控制的观点,指出冀东地区“就矿找矿”预测要素可简化为矿体控制程度和地球物理标志两大类。认为冀东铁矿地质工作程度高,进一步找矿的2个主要方向:一是已有大中型矿山深部和外围“就矿找矿”,预测其仍有较大资源潜力;二是迁安铁矿成矿区带第三层硅铁建造,属新发现的成矿空间,具有重要的找矿意义。Iron ores are important bulk metal resources in the world,and eastern Hebei Province serves as a major steel base in China.Eastern Hebei Province has been challenged by an increasingly insufficient supply of iron ores and limited resources,which has prompted geologists to illuminate the metallogenic regularity and prospecting direction in this area.On the basis of recent prospecting discoveries in eastern Hebei Province and prospecting theory in the exploration area,this work studied the geological characteristics of the iron deposits,and five metallogenic zones were divided.The iron formation,metamorphic deformation spatial distribution and the ore-controlling structures were analyzed,and the metallogenic regularity was summarized.It is suggested that the oreobodies in the Luannan iron deposit of Luanxian County show a joint control by anticlines and faults,and the prediction of ores in view of the already-known deposits can be based on ore body control degree and geophysical indicators.The highly explored eastern Hebei Province should focus on the following two prospecting directions:(1)the deep of the known large-to medium-sized deposits and the peripheral parts,which have considerable resource potential;and(2)the third layer of ferrosilicon formation in Qian an iron metallogenic belt,which belongs to a new metallogenic space with great prospecting signigicance.

关 键 词：沉积变质型铁矿 成矿规律 找矿方向 冀东 

分 类 号：P612[天文地球—矿床学]