论扬子板块东北缘的俯冲与回撤对山东地块的影响

Study on Impace of Subduction and Retracement of the Northeastern Margin of the Yangtze Plate to Shandong Block

摘要:

通过对山东中生代侵入岩体的时空展布、岩石化学及同位素特征的综合分析研究，提出了扬子板块东北缘俯冲与回撤的演化机制，分析了在这种机制下的成岩、成矿演化规律。认为扬子板块东北缘的俯冲与回撤控制了山东中生代的地质演化过程，其回撤在岩石圈深部造成的真空，导致软流圈物质的隆升，是胶东金矿大规模成矿作用的内在控制因素。

Abstract:

Through comprehensive analysis on time area distribution, chemical and isotopic characteristics of the rock of Mesozoic intrusions in Shandong province, subduction and evolution mechanisms of the northeastern margin of the Yangtze plate have been put forward, and evolution mechanism of mineralization has been analyzed. It is regarded that subduction and retracement of the northeastern margin of the Yangtze plate controlled Mesozoic geological evolution in Shandong province. Its retracement has caused the vacuum of the lithosphere, and the uplifting of material is in asthenosphere. It is an internal controlling factor of mass gold mineralization in Jiaodong gold deposit.