Genetic relationship between eclogite, lamprophyre, gold deposit and enriched mantle of Su-Lu active continental
中生代苏—鲁活动大陆边缘榴辉岩、煌斑岩、金矿及富集地幔间的成因联系

The Initial Eurasia plate and Paleopacific plate started to converge intensely at the end of Hercynian or beginning of the Triassic (250Ma). The subduction, its evolution and long distant effect are the foundamental factors controlling the formation and evolution of the most granitoids, volcanics, lamprophyres and gold deposits in Jiaodong terrane. The characteristics of lamprophyres in Jiaodong terrane are similar to lamprophyres related to gold deposits in other active continental margin or orogenic belts. Such as dyke occurrence, late stage emplacement, intensive autometasomatism, enrichment in large ion lithophile element(LILE) and volatiles, higher content of gold, high ratios of LREE/HREE and 87 Sr/ 86 Sr , low 143 Nd/ 144 Nd ratios, complementarity in many main and trace elements with eclogites, and intimate association with granotoids and shoshonite volcanics, other mafic rocks, felsic dyke and hydrothermal gold deposits. All these features could be related to the enriched mantle wedge and explained by mantle crust material exchange due to degassification, dealkalization, desilicification and remobilization of LILE during subduction of slab. The subduction and its evolution are the foundamental factors controlling the formation and evolution of most granitoids, volcanics, lamprophyres and gold deposits in Jiaodong terrane. All these features could be related to the enriched manntle wedge and explained by mantle crust material exchange during subduction of slab in active continental margin.