宁夏六盘山群沉积相、沉积环境演化分析

Ningxia six the Dish Mountains Deposition Mutually,the Deposition Environment Evolve Analysis

依据地层学、沉积学、沉积相、岩相古地理基本理论方法,分析了宁夏六盘山群岩性组合、沉积特征、岩相古地理及垂向沉积序列等沉积特征,确定了六盘山群是在盆地待续下沉、湖水不断加深、沉积物供给较为充足的条件下形成的,它的形成、演化受构造、物源和气候的控制,最终得出六盘山群沉积环境由氧化一还原一氧化,气候由干旱炎热—干热与温暖交替,沉积相由冲积扇—河流—湖泊—咸化湖泊。至止晚期燕山运动使盆地抬升,湖泊迅速消亡,结束了早白垩世六盘山盆地的这一完整的沉积演化历史过程。

Abstract：Learn according to the geologic strata,the deposition learn,deposition mutually,rock mutually thou geography basic theory method,analyzed Ningxia six the dish mountains rock combination,deposition characteristic,rock mutually thou geography and hang to deposition sequence etc.deposition characteristic,made sure six dish mountains in the basin and stay continuously under sink, lake water continuously deepen,deposition the thing supply more ample condition under formative of,its formation, evolve besubjected to control of the structure,thing source and weather,finally get six dish mountains deposition environments from oxidize-- revivification--oxidize,weather from dry blazing hot--dry heat and warmth replace,deposition mutually from alluvial--river--lake--salty turn lake.Go to the later period Yan mountain sport make basin lift to rise,the lake quickly perishes and ended the deposition of the integrity of early cretaceous life time six dish mountain basins to evolve history process .