川西前陆盆地南部中新生代砾岩的构造意义

Tectonic Significance of Meso-Cenozoic Conglomerate in the South of the West Sichuan Foreland Basin

通过对龙门山前缘川西前陆盆地南部中新生代地层中砾岩的岩石学特征、年代及分布规律的对比研究 ,认为五龙沟砾岩、大溪砾岩及大邑砾岩是龙门山造山运动的沉积响应 ;龙门山的崛起是一个多阶段性的持续过程 ,其发生的时限依次对应于燕山早期、燕山晚期—喜马拉雅初期。

Petrographic and geochronologic study and distribution of Meso-Cenozoic conglomerate in the south of the West Sichuan Foreland Basin in front of the Longmen Mountains indicate that the Wulonggou conglomerate, Daxi conglomerate and Dayi conglomerate were sedimentaryresponse to the Longmenshan orogeny and that uplift of the Longmen Mountains was a multi-stage process from Early Yanshan epoch via Late Yanshan and Early Himalayan epochs to Late Himalayan epoch.