Geochemical Characteristics And Metallogenic Significance Of Hanxing Iron Deposit In Qicun,Hebei

The Han-xing iron deposits are located in Handan-Xingtai area,south of Hebei province.It is the main concentration area of skarn iron ore.Qicun orefield is located in the northern part of the Han xing iron metallogenic concentrated area with good prospecting potential.This paper mainly takes the Xi hao zhuang iron ore and Bai Jian iron ore in qiun village ore field as two typical ore deposits.Through the comprehensive comparison and analysis of field and indoor data,the progress and understanding are as follows:1.The Xi hao zhuang iron ore deposit can be divided into three stages of mineralization and alteration:(1)the garnet-diopside stage,(2)the phase of quartz iron oxide,(3)the phase of quartz sulfide.2.The Bai Jian iron ore deposit can be divided into four stages of mineralization and alteration:(1)the stage of sodium feldspar,(2)the early skarn phase,(3)the third stage of the skarn phase and the quartzite phase.3.The temperature of the fluid inclusions in the Bai Jian iron deposit is about 300 ?-400 ?.4.The iron isotope tracer study shows that the iron content in ore bearing hydrothermal solution is mainly derived from magmatic hydrothermal solution,followed by altered mineral iron metasomatism.5.The geochemical characteristics of the Bai Jian iron ore show that the material source of the ore-forming fluid is related to the elements of K,Ca,Na,Mg,Al,F and Cl.The geochemical characteristics of the altered rocks indicate that the source of the ore-forming material has the characteristics of unity,indicating that it may be the product of the concurrent magma activity.6.The zicon U-P isotope dating of the diorite in SIMS way shows that it is an early Cretaceous product.Combined with two typical deposits,the metallogenic model of Hanxing iron ore deposit in Qicun ore field is discussed from the aspects of strata,structures,magmatic rocks,alteration of surrounding rock,fluid inclusion and geochemical characteristics.So as to improve the research degree of this type of ore deposits,we aimed to provide reference for geological workers to find ore in the region.