陆良盆地新近系茨营组三段T—R旋回层序研究

TRANSGRESSION-REGRESSION CYCL IC SEQUENCE OF THE SUBMEM BER OF N2c3 IN LULIANG BASIN

依据对陆良盆地地区地质测井和地震资料等的综合研究,本文将茨营组三亚段划分为一个完整的湖进——湖退(T-R)沉积旋回层序,并且在区域范围内可追踪对比。水进体系域内部广泛发育厚层的湖泊沉积,只有少量的三角洲砂体零星分布于其中,水退体系域则以扇三角洲沉积为主。

This Article formed by alluvial strata,divided into one T-R cyclic sequences which are equivalent one global climate change cyclic sequences.Each of sequences consists of base-leveltransgressive system tract and base-level regressive system tract,which can be traced and correlated in the studied area.In this article,the flood plain depositional system is put forward,which indicates the base-level uplift.When the base level gradually uplift,push-transporting deposition and suspendtransp orting deposition dom...