龙门山造山带中生代花岗岩带成因及其构造意义

GENESIS AND TECTONIC SIGNIFICANCE OF THE MESOZOIC ERA GRANITE TERRAIN IN LONGMEN MOUNTAINS OROGEN

总结了龙门山造山带印支末 -燕山期花岗岩带地质地球化学特征及演化规律。在探讨其成因及构造意义的基础上 ,将龙门山造山带与传统的 A型与 B型俯冲带的岩浆作用进行了对比 ,指出龙门山造山带的岩浆作用的不同特点是其区别于传统 A型。

Based on the development law and genesis of the Indo Yanshan epoch granite terrain in the Longmen Mountains West Sichuan mountain basin system, the paper compares the magmatism both from L type subduction and traditional A or B type subduction zone and indicates that the different characteristics of the magmatism in Longmen Mountains orogene are favorable evidence which distinguishes the orogene from the traditional A and B type or other subduction zones.