新疆伊犁铁列克特金矿床的地球化学特征研究

Geochemical characteristics of Tieliekete gold deposit,Yili,Xinjiang

为探究铁列克特金矿矿区的地质特征和矿床地球化学特征,采用电子探针测试方法,对采自围岩和矿体的样品进行了主、微量和稀土元素分析,并对矿床的微量、稀土元素和矿床成岩、成矿作用过程中元素的地球化学特征进行了研究。结果表明:矿体富集Rb、Th、K等大离子亲石元素,亏损高场强元素Nb、Ta、Ti,稀土元素质量比较高(118.76~209.72μg/g),分馏程度高,属于轻稀土富集型,且具有明显的Eu负异常和微弱的Ce异常。这些特征表明成矿物质来源于围岩地层。

To explore the geological characteristics and geochemical characteristics of the Tieliekete gold deposit, the contents of major, trace and rare earth elements in samples collected from surrounding rock and ore bodies are analyzed by means of EMPA etc. The geochemical characteristics of trace elements and rare earth elements in the deposit and the ore-forming process of the deposit are studied. The results show that the ore body is rich in large ion lithophile elements such as Rb, Th and K, while loss of high field strength elements such as Nb、 T a、 Ti. The content of rare earth element is relatively high which is up to 118. 76？209. 72 jitg/g, the fractional degree is high, belonging to the light rare earth enrichment type. It has obvious negative anomaly of Eu and weak anomaly of Ce. The above characteristics show that the ore-forming materials are from surrounding rock strata.