泰山地区早前寒武纪主要地质事件与陆壳演化

Main Geological Events and Crustal Evolution in Early Precambrian of Taishan Region

通过详细的野外地质调查和岩石学、地球化学、同位素年代学工作，建立了鲁西泰山地区地质演化框架：晚太古代早期表壳岩形成（２８４０～２８２０Ｍａ）；晚太古代早期望府山期英云闪长岩侵位和高角闪岩相变质变形改造（＞２７００Ｍａ）；晚太古代晚期绿岩建造形成和高绿片岩相－低角闪岩相变质变形改造（２７００～２６００Ｍａ）；晚太古代晚期大众桥期基性－中酸性岩侵位（２５６０～２５３０Ｍａ）；晚太古代晚期傲徕山期二长花岗岩侵位（２５６０～２５１４Ｍａ）；早元古代初期中天门期中性－中酸性岩侵位（２５１９～２４９０Ｍａ）；早元古代初期摩天岭期二长花岗岩侵位（２４９０Ｍａ）和早元古代晚期红门期辉绿岩侵位（２１００～１８００Ｍａ）。晚太古代早期变质表壳岩和望府山期英云闪长岩在高角闪岩相变质和强烈的变形作用改造下，形成北东向展布的似层状岩系，此阶段称为晚太古代早期阜平期前绿岩陆壳形成和改造阶段（＞２７００Ｍａ）；晚太古代晚期绿岩建造，大众桥期、傲徕山期深成侵入岩系呈北西向展布，且经历低角闪岩相－绿片岩相变质和塑性、韧性变形作用改造，此阶段称为晚太古代晚期陆壳增生和克拉通化阶段（２７００～２５００±２０Ｍａ）；在早元古代深成侵入岩系沿北西向?

The main framework for geological evolution of the Early Precambrian Taishan region,the western part of Shandong Province of China is constructed based on the field investigation, petrographic examination, geochemical analysis and isotopic age determination. The history is discerned in three stages: (1)the pre greenstone crust development stage in the early period of Late Archean (>2700Ma) with high amphibolite facies metamorphosed supracrust rocks (2840～2820Ma) and Wangfushan tonalitic gneisses with banded structure (>2700Ma)developed in the stage;(2)the crust accretion and cratonization stage in the late period of Late Archean (2700～2500±20Ma)with the Taishan lithologic group greenstone formation (2700Ma±), Dazhongqiaobasic intermediate acidic intrusive (2600～2523Ma)and Aolaishan anatectic monzonitic granite (2560～2514Ma) developed;(3)the brittle crust breaking stage in the Early Proterozoic (2500±20～1800Ma)with Zhongtianmen intermediate acidic intrusive, Motianling anatectic monzonitic granite and Hongmen diabase developed in the stage.