玛纳斯湖滨岸带盐类和风成砂混合沉积特征及环境意义:来自物理模拟实验的启示  

Mixed deposition characteristics and environmental significance of salt and aeolian sand in the lakeshore zone of Manas Lake:Enlightenment from physical simulation experiments

作　　者：刘怡婷 尹太举[1] 唐勇[2] 黄立良[2] 邹阳 LIU Yiting;YIN Taiju;TANG Yong;HUANG Liliang;ZOU Yang(School of Geosciences,Yangtze University,Wuhan 430100,Hubei;Research Institute of Exploration and Development,Xinjiang Oilfield Company,PetroChina,Karamay 834000,Xinjiang)

机构地区：[1]长江大学地球科学学院,湖北武汉430100 [2]中国石油新疆油田分公司勘探开发研究院,新疆克拉玛依834000

出　　处：《长江大学学报（自然科学版）》2023年第6期13-20,共8页Journal of Yangtze University(Natural Science Edition)

基　　金：国家自然科学基金项目“吉木萨尔凹陷芦草沟组页岩油甜点沉积动力过程模拟”(42072119)。

摘　　要：基于对玛纳斯湖现代沉积观察所获得的湖泊内砂岩为风成沉积的初步认识,在滨岸带盐类与风成砂混合沉积基本特征表述的基础上,结合物理模拟实验,分析了其成因过程,再现了风成砂与盐类的混合沉积形成过程,进一步对不同温度变化过程中的沉积差异进行探讨,揭示了盐类与风成砂的混合沉积形式能够反映气候变化。结果表明,温度影响盐类与风成砂混合沉积形式:①层状混合沉积:持续低温条件下(0~7℃),盐类晶体较粗厚度较大,与风成砂形成明显的韵律性层状混合沉积;②差异混合沉积:温度的连续变化(0~13℃)引起频繁的盐类在水面形成的薄膜状晶体在重力作用下崩塌,风成砂分布不均与盐类差异混合沉积。该认识为研究盐湖背景下混合沉积的形成机制提供了有价值的参考。Based on the analysis of the modern sedimentary observation of Manas Lake that sandstones within the lake are aeolian deposits,and the characteristics of salt and aeolian sand mixed deposition in the lakeshore zone were studied.Combined with physical simulation experiments,the formation process was analyzed,the mixed sedimentation process of aeolian sand and salt was reproduced,and the sedimentation differences in different temperature changes were further explored.It is revealed that the mixed deposition form of salt crystallization and aeolian sand can reflect climate change.The results show the differential mixing style of salt and aeolian sand is mainly attributed to temperature:①A thick salt layer with rhythmic interbedded deposition with eolian sand forms at low temperature(0~7℃),shows a layered structure.②The continuous change of temperature(0~13℃)leads to frequent salt collapse settlement and recrystallization,resulting in irregular mixed deposition of salt and aeolian sand.This insight provides valuable reference for studying the formation mechanism of mixed sedimentation under the background of salt lakes.

关 键 词：现代沉积 混合沉积 温度差异 物理模拟 

分 类 号：TE121.3[石油与天然气工程—油气勘探] P618.13[天文地球—矿床学]