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盐源-丽江构造带处于扬子大陆与青藏特提斯的结合部,其造山时代的确定,不仅对正确认识该区的构造性质与发展历史及指导矿产勘查有重要意义,而且有助于判定印度-欧亚板块碰撞事件对欧亚板块内部影响的广度和深度。通过系列构造-成矿测年,结合地层、构造、岩浆活动、成矿作用的综合研究,证实盐源-丽江构造带是新生代陆内造山带,而不是印支造山带。其造山作用主要发生于中-晚始新世之交的喜马拉雅期,与欧亚-印度板块碰撞触发的扬子大陆岩石圈向青藏特提斯岩石圈俯冲有关,表现为地壳多层次拆离、剪切和沉积盖层的滑脱、褶皱和推覆,属陆内造山,系印度-欧亚板块碰撞事件的一种远程效应。
The Yanyuan-Lijiang tectonic belt is located at the junction of the Yangtze and the Tibet Tethys. The determination of the orogenic age not only is of great significance to the correct understanding of the tectonic and developmental history of the area and the exploration of mineral exploration, but also helps to determine the extent of India The extent and depth of the impact of the Eurasian plate collision on the interior of the Eurasian plate. Based on the series of tectono-metallogenic dating and the integrated study of stratigraphy, tectonics, magmatism and mineralization, it is confirmed that the Yanyuan-Lijiang tectonic belt is a Cenozoic intracontinental orogenic belt instead of the Indosinian orogenic belt. The orogeny occurred mainly in the Himalayan period between the middle and late Eocene and is related to the subduction of the lithosphere of the TTI in the Qinghai-Tibet Plateau triggered by the Eurasian-Indian plate collision. It is characterized by multi-level crustal detachment and shear deformation of the crust Slippage, folds, and nappe of the cut and sedimentary caprocks are intracontinental orogenies, a long-range effect of the Indian-Eurasian plate collision.