中国西南部新生代陆内转换造山带

近年研究表明，位于青藏高原东部的松潘－甘孜造山带和三江造山带，新生代时期地壳隆升急剧，构造作用显著，岩浆活动突出，相应的成矿作用丰富多彩。据此，作者认为这是一次遍及全区的重要陆内造山作用，从而在原中生代造山带基础上更新形成现今呈南北向的新生代造山带。鉴于它具有处于大陆转换带构造位置、遭受双向挤压应力、显著的走滑断层活动以及构造－地貌三分性等特征，作者建议统命为大横断陆内转换造山带。最后，作者初步提出该造山带的双向造山动力学模式。

A CENOZOIC CONTINENTAL TRANSFORM OROGENIC BELT IN SOUTHWEST CHINA

Recent studies indicate that Songpan-Garze and Sanjiang(the Nujiang, Lancang and Jinsha Rivers)orogenic belts in the east Qinghai-Xixang Plateau are characterized by rapid uplifting,strong tectonism and magmatism,rich and varied mineralizations in Cenozoic.Accordingly,author believes that this is an important continental orogeng extending all over southwest China.It built up the Cenozoic longitudinal orogenic belts on the basis of the Mesozoic orogenic belts.In view of tectonic position lying in continental transform belt,bidirectional compressive stress,strong strikeslip faulting and tecfonic-geomorphologic zonation,author suggests refer to them as Great Hengduan continental transform orogenic belts. Finally,a bidirectionally orogenic dynamic model is proposed.