墨西哥西马德雷山脉中—新生代构造、岩浆演化及成矿特征

The tectonics, magmatic evolution and metallogenic characteristics in Mexican Sierra Madre Occidental during the Mesozoic-Cenozoic period

墨西哥西马德雷山脉是白垩纪—新生代岩浆活动和构造运动形成的。中新生代岩浆活动可以分为5个主要阶段:侏罗纪—早白垩世、晚白垩世—古新世、始新世—渐新世、中新世早期和中新世中期—现代。这些岩浆活动和构造运动与法拉隆(Farallon)板块向北美大陆俯冲和加利福尼亚湾打开相关。墨西哥中新生代的成矿作用与东太平洋板块边缘连续的俯冲过程密切相关,矿床类型多样,包括VMS(与火山相关的块状硫化物)型、斑岩型、IOCG(铁氧化物铜金)型、矽卡岩型等。

The Sierra Madre Occidental in Mexico was formed by Cretaceous-Cenozoic magmatic and tectonic evolution.Five main magmatic stages for the Mesozoic-Cenozoic could be recognized in Mexico,i.e.,Jurassic to Early Cretaceous,Late Cretaceous to Paleocene,Eocene to Oligocene,Early Miocene,and Middle Miocene to the present.The magmatic and tectonic history in the Sierra Madre Occidental was related to the opening of the Gulf of California and the subduction of the Farallon plate to the North American continent.The Mesozoic-Cenozoic metallogeny in Mexico probably resulted from the continuous subduction process at the edge of the eastern Pacific plate.The types of deposits formed in this metallogenic epoch include VMS,porphyry,IOCG,skarn and other types.