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 Al
2O
3, low total alkali, TiO
2, 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.