| Abstrakt: |
Pyrite composition characteristics can reflect its physical and geochemical formation backgrounds, also are the important parameters to further discuss the genesis of minerals and ore deposit. In this paper, major and trace elements of 13 pyrite samples from Dabaoshan polymetallic ore deposit were analyzed using EPMA, the results suggest that S/Fe atomic ratio of pyrite in dacitic porphyries were similar with reference standard value, however that ratio in granodioritic porphyries is 2.051, which is slightly higher than the reference standard value; trace elements Cu, Zn and Pb show the characteristic of high oxygen fugacity settings, the Co content in pyrite was significantly lower than that of Ni, and Co/Ni is far less than 1, all the evidences show the characteristics of sedimentation-reformation ore deposit. |
