秦岭-大别新元古代-中生代沉积盆地演化

秦岭-大别造山带处于中央造山带的东部，经历了复杂的构造-沉积历史.在系统分析研究区4个二级和13个三级构造单元岩石地层、化石组合、同位素年代学及构造学等资料的基础上，划分出18个沉积盆地类型，并讨论新元古代-中生代构造-沉积演化:(1)新元古代-早古生代:商丹洋以北的北秦岭为岩浆弧和弧前盆地；南秦岭为陆内裂谷-台盆、台地-陆缘裂谷发育阶段；大别-苏鲁为陆内裂谷-台盆台地发育阶段；(2)晚古生代:北秦岭为海陆交互陆表海；勉略洋于泥盆纪开启；南秦岭为弧后陆棚与台盆台地并存发育阶段；(3)三叠纪:陆陆碰撞造山，全区进入前陆盆地发育阶段；(4)侏罗纪-白垩纪:断陷盆地和压陷盆地发育阶段. 

Evolution of Neoproterozoic-Mesozoic Sedimentary Basins in Qinling-Dabie Orogenic Belt

As the eastern part of the Central Orogenic Belt, Qinling-Dabie Orogenic Belt has a complicated tectonic-sedimentary history. On the basis of a systematic research on the lithostratigraphy, fossil assemblages, isotopic geochronology and tectonics of 4 secondary and 13 three-level tectonic units, this paper divides the study area into 18 types of sedimentary basins, and discusses its tectonic-sedimentary evolution from Neoproterozoic to Mesozoic: (1) Neoproterozoic-Early Paleozoic: North Qinling was magmatic arc and forearc basin; South Qinling experienced intracontinental rift to interplatform basin-platform to continental-margin rift; Dabie-Sulu experienced intracontinental rift to interplatform basin-platform. (2) Late Paleozoic: North Qinling was marine-continental alternation epeiric sea; Mianlüe oceanic basin opened in the Devonian; South Qinling was backarc shelf and interplatform basin-platform at the same time. (3)Triassic: continental collision orogeny, stage of foreland basins. (4) Jurassic-Cretaceous: stage of fault basins and depressional basins.