THE DEPOSITIONAL SYSTEMS AND DEPOSITIONAL SYSTEM TRACTS IN MEIHE BASIN

Meihe basin is the constitution southern sector of the great Fushun一Mishan deep fault.It is a typical coal-accumulating fault basim.The depositional systems and depositional system tracts are studied with real core,logging and grain size analysis etc.The main depositional systems are alluvial fan-fan-delta depositional system,lacustrine depositional system and fluvial-delta depositional system.Every depositional bystem consists of a serial sedimentary units.The alluvial fan-braided stream dapositional system tract,the alluvial fan-fan-detal-lacustrine depositional system tract and fluvial-detal-lacustrine depositional system tract are occurred in different evolutionary stage of basin.