摘要
中国大陆板块的演化经历了三次板块构造旋回的叠加。在元古代板块构造旋回末期曾联合为一个元古大陆,并与全球元古联合古陆聚敛在一起。在古生代板块构造旋回初期,中国元古大陆与全球元古联合古陆一起,同步发生裂解、漂移和海底扩张作用。中国元古大陆裂解为新疆古陆、华北古陆、华南古陆、柴达未古陆、华东古陆,它们之间为窄大洋所隔,在古生代时期各陆块在赤道附近,向北半球低纬度带漂移,羌塘—印支古陆于晚泥盆—早石炭世时从冈瓦纳大陆裂解出来,随古特提斯洋的扩张自南半球向赤道漂移,经加里东、海西和印支运动,在古生代扳块构造旋回末期(T),中国大陆主体又联合在一起,并使欧亚大陆形成。中、新生代板块构造旋回早期藏南—印度古陆从冈瓦纳大陆裂解出来,从南半球向赤道漂移;华东古陆此时期演化为菲律宾海板块,与太平洋板块一起向中国大陆板块发生俯冲、消减作用;在上白垩—中新世时期藏南—印度古陆与中国大陆西南部发生强烈的碰撞、挤压与收敛活动;由于北大西洋和印度洋的扩张作用,使中国大陆向北作顺时针方向的旋转、漂移,仅第四纪就向北漂移达数百千米。 中国大陆板块在三次板块构造旋回活动中受大陆裂解、漂移、碰撞和收敛作用的影响,控制着中国含油气盆地岩相古地理的演化和中国含油气盆地类型?
The Pan—China Plate underwent evolution of superimpositions of three plate tectonic cycles. During late Proterozoic cycle, a Proterozoic continent was ever formed and converged to Pangaea of the globe. During early Palaeozoic cycle, both Proterozoic continent and Pangaea went through dispersion, displacement and sea floor spreading synchronously. The former was dispersed into five protocontinental segments: Xinjiang segment, north China segment, south China segment, Chaidamu segment and east China segment. They were all seperated by the narrow oceans. In Palaeozoic period, each of the segments that were all then in the vicinity of the equator were drifting northwards to low latitude belt. Qiangtang—Indo—Chinese protocontinent was disintegrated from the Gondwana during D_3—C_1, when it drifted from southern hemisphere to the equator along with spreading of Palaeotethys ocean crust. In late Palaeozoic period (T), main body of Pan—China plate was subjected to the Caledonian, Hersinian and Indosinian movements before they converged again, resulting in the formation of Eurasia continent. During early Mesozoic—Cenozoic cycle, south Tibetan—Indo protocontinent was disintegrated from the Gondwana, drifting toward the equator from southern hemisphere; east China protocontinent was then evolved into the Philippine Sea plate which subducted to Pan—China plate with Pacific—Oceanic plate; during K_2—N_1, intense collision, compression and continent—continent convergence took place between south Tibetan—Indo protocontinent and southwestern Chinese continent. Because of the spread of north Atlantic Ocean and Indian Ocean, it made Pan—China plate drift and clockwise rotate northwards for hundreds of kilometers during Quaternary period.It was the three cycles to Pan—China plate which underwent the disintegration, displacement, collision and convergence that affected and controlled the evolution of the lithofacies palaeogeography and generation evolution of oil and gas bearing basins of China.
出处
《新疆石油地质》
CAS
CSCD
北大核心
1991年第2期91-106,共16页
Xinjiang Petroleum Geology
关键词
油气田地质
板块
裂化
漂移
continental plate, plate cycle, plate fracture, plate drift, petroliferous basin.
