GEOCHEMICAL CHARACTERISTICS AND GEOLOGICAL IMPLICATION OF THE ORE-FORMING ROCKS OF THE CHANGANPU Mo (-Cu) DEPOSIT IN JILIN PROVINCE
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摘要: 为查明吉中地区典型斑岩型矿床矿化特征及成矿规律，对长安堡铜钼矿床地质特征和成矿岩体进行了研究.该矿床成矿岩体为黑云母二长花岗岩.岩石主量、微量及稀土元素组成特征为：高硅，全碱含量不高，富钾，Al2O3含量较高，TiO2含量较低，贫Y和Yb，相对富集大离子亲石元素（LILE）和轻稀土元素（LREE），而高场强元素（HFSE）、重稀土元素含量（RREE）相对较低，具负Eu异常，（La/Yb）N值较高，2件未蚀变样品具有较低的（Rb/La）N值，与我国东北部地区岛弧钙碱性火成岩地球化学特征基本一致.Abstract: To ascertain the metallogenic characteristics and regularity of the typical porphyry deposits in central Jilin Province, this paper studies the geological characteristics and ore-forming intrusive rocks of the Changanpu Cu-Mo deposit. The geochemical compositions of the metallogenic biotite monzogranite show the characteristics of high silicon, potassium and Al2O3, low total alkali, TiO2, Y and Yb contents, with relative enrichment in LILE and LREE, depletion in HFSE and HREE, negative Eu anomaly and high (La/Yb)N value. Two unaltered samples of biotite monzogranite show relatively low (Rb/La)N values. The characteristics of the rock bodies are similar to those of the island arc calc-alkaline igneous rocks in Northeast China.
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