冀东司家营沉积变质型铁矿床找矿模型  

The Exploration Model of the Sijiaying Sedimentary Metamorphic Iron Deposit in Eastern Hebei Province

作　　者：许英霞[1] 张龙飞[1] 李厚民[2] 李立兴[2] 高孝敏[3] 贾东锁[3] 

机构地区：[1]河北联合大学矿业工程学院地质系,河北唐山063009 [2]中国地质科学院矿产资源研究所国土资源部成矿作用与资源评价重点实验室,北京100037 [3]河北省地矿局第二地质大队,河北唐山063000

出　　处：《地质与勘探》2015年第1期23-35,共13页Geology and Exploration

基　　金：国土资源部公益性行业科研项目:冀东地区沉积变质型铁矿富矿控矿条件及科学基地研究(201111002-04);地质矿产调查评价工作项目:辽冀地区沉积变质型铁矿控矿因素和勘查技术方法组合优选联合资助

摘　　要：司家营铁矿床是冀东地区典型的沉积变质型铁矿床,也是冀东地区最大的铁矿床,累计探明资源量达32亿吨。本文首先对司家营铁矿的区域地质、矿区地质及控矿条件等进行了系统总结,并结合前人对司家营铁矿构造背景、成矿时代、铁矿成因及后期改造作用的研究,初步建立了司家营铁矿的成矿模式。通过对司家营铁矿的航磁、地磁异常特征、区域重力异常特征及可控源音频大地电磁测深(CSAMT)剖面进行解析和矿致异常信息的提取,认为重磁法为主、电法为辅的地球物理方法在该地区可有效圈定矿集区。因此,本文在总结归纳司家营铁矿矿床地质控矿条件及地球物理特征的基础上,建立了司家营铁矿地质-地球物理找矿模型。该模型的建立可为滦县-滦南-昌黎地区进一步开展沉积变质型铁矿的找矿工作提供理论依据。The Sijiaying iron deposit is one of typical sedimentary metamorphic iron deposits and the biggest iron deposit in eastern Hebei Province.The proven resource of this deposit has been verified to a total of 3. 2 billion tons. The data of regional geology,deposit geology and ore-controls in this area are summarized in this paper. Then combined with previous work on the tectonic background,metallogenic epoch,genetic types and late reformation,a metallogentic model for this deposit is constructed. Based on data of aeromagnetic,magnetic and gravity anomalies,coupled with the geological interpretation of CSAMT profiles and the extracted information of mineralization anomalies in the Sijiaying iron deposit,it is believed that the geophysical technology which consists of gravity and magnetic prospecting,supported by the electromagnetic prospecting as auxiliary,is an effective method to delineate oreconcentrating areas. Thus a geological-geophysical model is established for the Sijiaying iron deposit based on the summary of the metallogenic geological conditions and the physical characteristics of the region. This model can provide a theoretical basis for the prospecting work of sedimentary metamorphic iron deposits in the Luanxian-Luannan-Changli area.

关 键 词：沉积变质型铁矿床 找矿模型 成矿模式 司家营 冀东 

分 类 号：P618.31[天文地球—矿床学]