秦岭显生宙古海洋演化

EVOLUTION OF THE PHANEROZOIC PALEO-OCEAN OF QINLING

从寒武纪到中三叠世末，西伯利亚－中国东部－澳大利亚这个＂轴心＂由东西向沿赤道排列状态顺时针旋转成为南北向沿子午线排列状态。同时华北与华南均向西伯利亚方向漂移并最终与之合并为亚洲大陆。在这个总过程中，秦岭海经历了４个阶段的演化：（１）早古生代北秦岭小洋盆及南秦岭小洋盆及裂陷深海盆的演化；（２）晚加里东－早海西期压性环境下南北秦岭的拼合及泥盆纪海盆的沉积分异；（３）晚海西－早印支期南张北压环境下中秦岭裂陷海盆及北秦岭残余海盆的演化；（４）印支期秦岭地区分中、晚两幕褶皱成山，海域消亡。

From Cambrian to the end of Middle Triassic,the Siberia-eastern China-Australia axis rotated from an eat-westward equatorial arrangement to south-northward longitudinal arrangement.Meanwhile North and South China migrated toward Siberia and finally integrated with it to form the Asia Continent. During this general process, evolution of the Phanerozoic paleo-ocean of Qinling underwent four stages: (1) the evolntion of North Qinling mico-ocean and South Qinling micro-ocean as well as rifted abyssal basin during Early Paleozoic;(2) the Late Caledonian-Early Hercynian coalescenoe of North and South Qinling and Devonian basinal sedimentary differentiation under compression;(3) the Late Hercynian-Early Indosinian evolution of Central Qinling rift basins and North Qinling residual basins under extension in south and compression in north;(4) the sea-basin vanishment,folding and orogeny of Qinling area during middle and late episodes of Indosinian movement.