front pump (input pump)

The authors have pided pre-oil-bitumen into three genetic types: exsudatinite, algo-bitumen and zo-bitumen on the basis of its origins.

作者从成因角度将前油沥青分为渗出体、藻类型沥青及动物型沥青等三种类型；在塔里木下古生界源岩中首次识别出藻类型沥青及动物型沥青，并详细地研究了其光学特征，探讨了形成机理，建立了形成模式。