混杂堆积石英砂表面特征研究  

Research on the Surface Textures of the Quartz Sand in Diamictons

作　　者：陈瑞琛 陈剑[1] 崔之久[2] CHEN Ruichen;CHEN Jian;CUI Zhijiu(School of Engineering and Technology,China University of Geosciences,Beijing 100083,China;School of Urban and Environmental Sciences,Peking University,Beijing 100871,China)

机构地区：[1]中国地质大学(北京)工程技术学院,北京100083 [2]北京大学城市与环境学院,北京100871

出　　处：《现代地质》2019年第5期1128-1136,共9页Geoscience

基　　金：国家重点研发计划项目(2018YFC1505003);国家自然科学基金项目(41571012);国家自然科学基金重点项目(41230743)

摘　　要：由于混杂堆积的搬运过程与沉积过程具有快速无分选的特点,其成因识别成为国内外学者研究的焦点。石英砂表面特征的综合研究作为沉积环境重建的方法之一,在混杂堆积亚相的区分中能起到较好的作用。概述了冰碛、滑坡/崩塌/崩滑、泥石流及溃坝堆积的石英砂表面特征的研究现状,对这4种混杂堆积类型的石英砂表面特征进行整合厘定,比较了不同类型的石英砂表面结构特征,揭示其主要机械结构和组合模式的异同,强调在混杂堆积石英砂表面特征研究中能级与粒间接触方式判断的重要性。最后,指出目前混杂堆积石英砂表面特征研究的难点,并探讨今后研究的方向和应重点解决的问题。Due to the characteristics of quickness and no-sorting in the transport and deposition processes,the cause of formation identification of diamictons has become the main concern among domestic and foreign scholars.The comprehensive study on the surface textures of quartz sands in diamictons is one of the common methods to reconstruct sedimentary environment,which plays an important role in the identification of diamictons.This paper summarized the previous studies to construct an interpretation scheme and combination mode to differentiate among deposits of till,landside,debris,and dam-break flood deposits based on micro-textures.Moreover,the relationship between the particle contact mode and quartz sand surface micro-texture of these highenergy events was analyzed.Based on the current difficulties in the study of surface textures of quartz sands in diamictons,the future research direction and the key problem to be solved were proposed.

关 键 词：混杂堆积 石英砂 表面特征 组合模式 粒间接触方式 沉积环境 

分 类 号：P642.2[天文地球—工程地质学]