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秦岭造山带是华北板块、秦岭微板块、扬子板块多期次碰撞而成的复合造山带.近十年来,随着地矿部和国家自然科学基金委设立攻关和重大项目的推动,有关秦岭造山带的结构、演化及其动力学研究取得了重大进展和突破,但也引起对一些重大基础地质问题的争论.其争论的焦点之一是秦岭显生宙的古海洋格局、形成及演化历史和秦岭造山带的造山过程.张国伟提出了秦岭造山带古生代三块(华北板块、秦岭微板块、扬子板块)两线(商丹古缝合线、勉略古缝合线)的构造格局,并指出勉略古缝合带代表了已消失的南秦岭有限洋盆.但该洋盆的形成演化及闭合历史一直未取得可靠的古生物年代学证据.笔者首次在勉略蛇绿岩共
Qinling orogenic belt is the North China plate, Qinling microplate, the Yangtze plate multi-stage collision or composite orogenic belt.For the past decade, with the Ministry of Mines and the National Natural Science Foundation set up research and major projects to promote the Qinling orogenic belt Has made significant progress and breakthroughs in the study of its structure, evolution and dynamics, but has also caused controversy over some of the major underlying geological issues. One of the focal points of its controversy is the paleoceanographic pattern of the Epoch, the formation and evolution of the Qinling Mountains and the Qinling Mountains Orogenic belt orogenic belt, Zhang Guowei proposed the tectonic framework of the Paleozoic three blocks (North China Plate, Qinling Microtiter Plate and Yangtze Plate) of the Qinling orogenic belt (Shangdan ancient suture and Mianlue ancient suture) The suture zone represents the disappeared South Qinling finite ocean basin, but the evolution and closure history of the ocean basin have not obtained any reliable evidence of paleontological chronology. For the first time,