青藏高原东北缘临夏盆地王家山地区沉积环境分析与构造隆升  

A sedimentary environment analysis and the tectonic uplift of Linxia Basin in the northeast margin of Tibetan Plateau

作　　者：范马洁[1] 宋春晖[1] 

机构地区：[1]兰州大学西部环境教育部重点实验室,甘肃兰州730000

出　　处：《兰州大学学报（自然科学版）》2003年第3期84-89,共6页Journal of Lanzhou University(Natural Sciences)

基　　金：国家自然科学基金 ( 90 2 1 1 0 1 3 );国家重点基础研究发展规划 ( G1 9980 40 80 9);教育部科学技术研究重大( 0 0 -0 5 )资助项目 .

摘　　要：通过对青藏高原东北缘临夏盆地王家山地区新生代地层沉积相研究 ,划分出 7个沉积旋回 ;盆地沉积与高原隆升的响应关系揭示出高原 2 9Ma以来先后经历了初期隆升至稳定阶段 ( 2 9.0～ 2 1 .4Ma)、中期隆升至稳定阶段 ( 2 1 .4～ 6.2 5 Ma)、后期逐步隆升阶段 ( 6.2 5～ 3 .5 8Ma)和晚期急剧强烈隆升阶段 ( 3 .5 8～ 0 Ma) ,可见青藏高原的隆升是一个多阶段、不等速和非均变的复杂过程 .The paper provides the geological evidences for recovering the history of the plateau uplift by analyzing Cenozoic straitigraphy of Linxia Basin in the northeast margin of Tibetan Plateau.Cenozoic stratigraphy was widely distributed in Linxia Basin and seven sedimentary cycles are recognized.The relationship between the sedimentation of Linxia Basin and the uplift of Tibetan Plateau reveals that the Plateau has experienced four phases in Cenozoic era: preliminary uplift and stable phase (29.0～21.4 Ma),medium uplift and stable phase (21.4～6.25 Ma),later stepwise uplift phase (6.25～3.58 Ma),terminal rapid and intense uplift phase (3.58～0 Ma).So the uplift of Tibetan Plateau is a process of multiple phases,unequal speed and irregular movement.

关 键 词：临夏盆地 沉积环境 青藏高原 构造隆升 新生代 

分 类 号：P512.2[天文地球—地质学] P588.21