末次间冰期以来毛乌素沙漠河湖相沉积发育年代起讫

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中文摘要：毛乌素沙漠地处东亚季风西北边缘,沙漠内部广泛发育风成沉积和河湖相沉积物,尤其是河湖相沉积物,因其沉积连续、分辨率高、受到的扰动较少等优点而被广泛用于古气候环境的重建.自末次间冰期以来,研究区发育了多期河湖相沉积,为探讨气候变化和湖泊消涨之间的关系提供了可能.文中通过对前人已有研究进行全面梳理,从88个典型剖面中筛选出54个具有代表性的沉积剖面及306个河湖相沉积的年代数据,对其进行归一化汇总、整理和校正,构建末次间冰期以来毛乌素沙漠河湖相沉积的发育年代框架.结果表明末次间冰期以来毛乌素沙漠河湖相沉积主要发育在以下三个时期:末次间冰期(140-70 ka B.P.)、末次冰期间冰阶(55-23 ka B.P.)以及末次冰消期至中全新世(15-3.0 ka B.P.).结合区域对比和机制分析,认为毛乌素沙漠末次间冰期以来河湖消涨扩缩过程与东亚季风强弱变化关系密切.

外文标题：The beginning and the end of fluvial lacustrine sedimentary development in the Mu Us Desert since the last interglacial

外文摘要：The Mu Us Desert is in the northwest edge of the East Asian monsoon,and there are extensive aeolian sediments and fluvial-lacustrine sediments in the desert,especially fluvial-lacustrine sediments,which are widely used in the reconstruction of paleoclimate environment due to their advantages of continuous deposition,high resolution and less disturbance.Since the last interglacial period,several stages of fluvial-lacustrine sediments have developed in the study area,which provides a possibility for the study of the relationship between climate change and the development and extinction of lakes.Based on a comprehensive review of previous studies,54 representative sedimentary profiles and the dating data of 306 fluvial-lacustrine sediments were selected from 88 typical profiles,which were normalized summarized,collated and corrected to build a chronological framework of fluvial-lacustrine sediments in the Mu Us Desert since the last interglacial period.The results show that the fluvial-lacustrine sediments in the Mu Us Desert since the last interglacial period mainly developed in the following three periods:the last interglacial period(140-70 ka B.P.),interstadial of the glacial(55-23 ka B.P.)and the last deglaciation to the middle Holocene(15-3.0 ka B.P.).Based on regional comparison and mechanism analysis,it is found that the development and extinction of rivers and lakes in the Mu Us Desert since the last interglacial period are closely related to the change of East Asian monsoon strength.

外文关键词：

last interglacialMu Us Desertfluvial-lacustrine sedimentschronology

作者：

杨兴迪、刘小槺、李怡静、李小妹、梁爱民

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作者单位：

陕西师范大学地理科学与旅游学院,西安 710119

防沙治沙教育部工程研究中心,北京师范大学地理科学学部,北京 100875

关键词：

末次间冰期毛乌素沙漠河湖相沉积年代起讫

基金：

陕西省社会科学基金科技部科技基础资源调查专项中央高校基本科研业务费专项陕西省自然科学基础研究计划(定向委托)项目(2021)陕西师范大学暑期社会实践"求真知"专家团队调查研究项目(2023)

项目编号：

2023G0112022FY202304GK2023010032021JCW-172023SHSJZJ08

出版年：

2024

DOI：

10.13448/j.cnki.jalre.2024.123

干旱区资源与环境

中国自然资源学会干旱半干旱地区研究委员会　内蒙古农业大学

干旱区资源与环境

CSSCICHSSCD北大核心

影响因子：1.492

ISSN：1003-7578

年,卷(期)：2024.38(6)