Qierikeqi siderite deposit occurs in low-metamorphic rocks of Silurian System Wenquangou Group and it is composed of three ore bodies, which are typically layer or lens-like and about 1500～2500 meters long, 10～70 meters thick. The ores have a high total content of rare earth elements(∑REE=740. 97～820.21ppm), and the enrichment characteristics of light rare earth elements(LREE/HREE=13.17～14.74)suggest that the siderite is formed in medium-low alkali ore-bearing solution. The apparent positive anomaly of Ce (δCeF3.25～4.56)and feeble negative anomaly of Eu (δEu=0.64～0.94)indicates the relative reduction metallogenic environment. The Y/Ho average value of ore and siderite are both less than 28, which shows the deposits with hydrothermal genesis characteristics.%新疆且日克其菱铁矿床赋存于下志留统温泉沟群中低级变质岩系中,由三个矿段组成,总体呈层状、似层状、透镜状.矿石稀土含量较高(∑REE=740.97 ×10-6～820.21×10-6),轻稀土富集(LREE/HREE=13.17～14.74)的特征暗示了矿床形成于弱-中碱性的含矿溶液;明显的Ce正异常(δCe=3.25～4.56)和微弱的Eu负异常(δEu=0.64～0.94),表明相对还原的成矿环境;矿石和菱铁矿中Y/Ho的平均值均小于28,显示矿床具有热液成因的特征.
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