RESEARCH ON THE RELATIONSHIP BETWEEN THE LAMPROPHYRE AND GOLD MINERALIZATION IN BUSHANG GOLD DEPOSIT, EASTERN SHANDONG PROVINCE

In order to reveal the inner relations and origins of the lamprophyre and gold ores in the Bushang gold deposit in Eastern Shandong Province, on the basis of geological and petrological researches, the authors adopt wet-chemical approach, volumetric method, non-aqueous titration and spectrophotometry to analyze major elements, with IPS-AES, ICPMS, AFS and AAS methods for trace elements and rare earth elements. Study shows that the lamprophyre and gold ore are both derived from the I-type enriched mantle source (EMI), although the gold ore is mixed with crustal source material. According to the tectonic features, it is considered that the lamprophyre is from EMI magma, while the gold is from the volatile and oxidable ore-forming gas-liquid fluid of EMI, showing the characteristics of gold mineralization in the area with deep-seating, multi-position, multi-period and diversity.