干旱区研究

干旱区研究 >

2025 , Vol. 42 >Issue 7: 1323 - 1332

DOI: https://doi.org/10.13866/j.azr.2025.07.15

生态与环境

中国东北季风边缘区沙地风成沉积剖面光释光定年研究及其古环境意义

  • 黄龙 ,
  • 古斯乐图 ,
  • 周彩婷 ,
  • 杨夏瑶 ,
  • 司月君 ,
  • 黄日辉 ,
  • 杭晓菊 ,
  • 牛东风
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  • 1.岭南师范学院地理科学学院，广东 湛江 524048
    2.萨拉乌苏考古遗址公园管理局，内蒙古 乌审旗 017300
黄龙（1993-），男，博士，讲师，主要从事光释光年代学与地貌学研究. E-mail: huanglong@lingnan.edu.cn
牛东风. E-mail: niudongfeng@lingnan.edu.cn

收稿日期: 2024-10-11

  修回日期: 2025-04-30

  网络出版日期: 2025-07-07

基金资助

国家自然科学基金项目(42302212);萨拉乌苏考古遗址公园管理局校地合作项目(slws20230508)

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Optically stimulated luminescence dating of aeolian sediment profiles in the sandy areas of northeastern China near the edge of the monsoon zone and its paleoenvironmental significance

  • HUANG Long ,
  • Gusiletu ,
  • ZHOU Caiting ,
  • YANG Xiayao ,
  • SI Yuejun ,
  • HUANG Rihui ,
  • HANG Xiaoju ,
  • NIU Dongfeng
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  • 1. School of Geographical Sciences, Lingnan Normal University, Zhanjiang 524048, Guangdong, China
    2. Sjara-osso-gol Archeological Site Park Authority Administration, Wushen Banner 017300, Inner Mongolia, China

Received date: 2024-10-11

  Revised date: 2025-04-30

  Online published: 2025-07-07

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摘要

中国东北季风边缘区沙地对气候变化响应敏感，是研究风沙演化历史的理想场所。本文对科尔沁沙地（KE）和浑善达克沙地（HS）的两个典型风成沉积物剖面进行光释光定年分析，结合剖面沉积相所指示的环境信息，重建区域风沙演化历史，并探讨影响风沙堆积的因素。结果表明：（1） KE剖面在9.8~3.0 ka期间发育深黑色砂质古土壤，指示了风沙活动较弱；近0.2 ka以来剖面发育了较厚的浅灰色砂质古土壤，暗示了区域风沙活动较强，导致表层较厚的沉积物不断地被“翻新”而难以形成沉积年代较老的沉积物。（2） HS剖面在13.4 ka、1.2~0.5 ka及0.5 ka以来沉积灰黄色风沙层，指示了风沙活动较强；在11.6~1.9 ka前后发育深黑色砂质古土壤，指示了风沙活动较弱。（3） 13.4 ka以来研究区域古气候与风沙演化大致经历了三个阶段：13.4 ka至早全新世整体转暖，风沙活动较强；早-中全新世温暖湿润，风沙活动弱；晚全新世气候波动转冷，风沙活动较强。（4） KE与HS剖面深黑色砂质古土壤发育时间差异可能反映了沙地边缘区局地地形、气候等因素对风沙堆积和古土壤发育具有重要影响。

关键词： 风成沉积; 光释光定年; 古环境演化; 科尔沁沙地; 浑善达克沙地

本文引用格式

黄龙 , 古斯乐图 , 周彩婷 , 杨夏瑶 , 司月君 , 黄日辉 , 杭晓菊 , 牛东风 . 中国东北季风边缘区沙地风成沉积剖面光释光定年研究及其古环境意义[J]. 干旱区研究, 2025 , 42(7) : 1323 -1332 . DOI: 10.13866/j.azr.2025.07.15

Abstract

The sandy lands of northeastern China, located near the edge of the East Asian monsoon zone, are highly sensitive to climate change, making them ideal for investigating the evolutionary history of regional aeolian processes. This study presents optically stimulated luminescence dating of aeolian sediments from two representative profiles situated near the edge of the Horqin Sandy Land (KE) and the Otindag Sandy Land (HS). By integrating sedimentary facies data from the two profiles with additional regional paleoenvironmental records, we reconstructed the regional aeolian evolution history and examined the factors influencing sand and paleosol formation. The results revealed that: (1) The KE profile indicated the development of dark black sandy paleosols between about 9.8 and 3.0 ka, likely reflecting weak aeolian activity. In contrast, thick light gray sandy paleosols formed from around 0.2 ka, indicating intensified aeolian activity and continuous reworking of surface sediments, preventing older deposit formation. (2) In the HS profile, gray-yellow aeolian sand layers were deposited around 13.4 ka, 1.2-0.5 ka, and since 0.5 ka, indicating episodes of strong aeolian activity. Dark black sandy paleosols formed between about 11.6 and 1.9 ka, corresponding to a period of weaker aeolian activity. (3) Since about 13.4 ka, the region has undergone three stages of climatic and aeolian evolution: (i) a warming period from 13.4 ka to the early Holocene, associated with relatively strong aeolian activity; (ii) a warm and humid midHolocene, marked by reduced aeolian activity; and (iii) a late Holocene period of fluctuating cooling, during which aeolian activity increased again. (4) Variations in the timing of dark black sandy paleosol development between the KE and HS profiles, compared with records from the central parts of these sandy lands, suggest that regional topography and paleoclimatic differences may significantly influence aeolian sediment development.

Key words： aeolian sedimentation; OSL dating; paleo-environmental change; Horqin Sandy Land; Otindag Sandy Land

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