浊流沉积研究的新进展:鲍马序列、海底扇的重新审视

本文在总结前人对浊流沉积研究的基础上,分析前人对浊流与浊积岩、浊流沉积与浊流相模式的对应关系之间的认识,并对鲍马序列进行重新审视。在海底扇研究过程中,鲍马序列已经不能充分反映浊流沉积的全过程。鲍马序列所反应的沉积模式其实是由碎屑流、浊流、底流等多种形式流体组合和改造后的结果,海底扇沉积模式不能笼统归结为浊流沉积作用的结果。在完善重力流、底流等沉积作用的同时,建立一个与沉积作用相互联系的深海沉积系统,以对深海研究提供更好地指导和预测。

Current advances in the research of turbidity current deposits: Reinterpretation of the Bouma sequence and submarine fan deposits

The present paper gives a reinterpretation of turbidity currents,turbidites and the Bouma sequence. In the research of modern submarine fans,the Bouma sequence can''t represent the complete processes of turbidity current deposition. The sedimentary models indicated by the Bouma sequence,in fact,should be the combination and reworking of debris flows,turbidity currents and bottom currents,and thus the Bouma sequence can''t be selected as the sole model for the recognition and prediction of turbidity current deposits. Instead,sedimentary models should be constructed according to distinct sedimentary environments due to the variety of turbidity current deposition. In addition,the turbidity current models will be further evidenced by modern deep-sea deposition in the future research.