陕西周原黄土粒度和类脂物总量对全新世气候和古人类活动的指示意义&#x0002A;

周璐; 李玉梅; 张玉修; 龙雨佳; 吴金旭; 刘浩宇

doi:10.7523/j.ucas.2025.065

中国科学院大学学报 >

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DOI: https://doi.org/10.7523/j.ucas.2025.065

陕西周原黄土粒度和类脂物总量对全新世气候和古人类活动的指示意义^*

周璐 ,
李玉梅 ,
张玉修 ,
龙雨佳 ,
吴金旭 ,
刘浩宇

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1.中国科学院大学地球与行星科学学院,地球系统数值模拟与应用全国重点实验室, 北京 100049;
2.中国科学院大学测试中心分子化石实验室, 北京 101400

†E-mail： liym@ucas.ac.cn

收稿日期: 2025-10-15

修回日期: 2025-12-31

网络出版日期: 2025-12-31

基金资助

国家自然科学基金（42077412,41430531,41272207）和中央高校基本科研业务费专项（E3E40404X2）资助

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The indicative significance of grain size and total lipid content for Holocene climate and paleo-human activities in Zhouyuan Loess, Shaanxi

ZHOU Lu ,
LI Yumei ,
ZHANG Yuxie ,
LONG Yujia ,
WU Jinxu ,
LIU Haoyu

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1. State Key Laboratory of Earth System Numerical Modeling and Application, Chinese Academy of Sciences, Beijing 100049, China;
2. Laboratory of Molecular Fossils of Testing Centers, University of Chinese Academy of Sciences, Beijing 101400, China

Received date: 2025-10-15

Revised date: 2025-12-31

Online published: 2025-12-31

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摘要

本文通过对礼村剖面磁化率、粒度、颜色和总类脂物含量的多指标综合分析,重建该地区全新世古环境并探讨与古人类活动的关系。研究表明,上述指标清晰地记录了末次冰期以来的气候变化,包括全新世中晚期的冷事件。在6ka B.P.时,礼村剖面的粒度较梁村剖面出现增大和突变;在2.8ka B.P.时,总类脂物含量异常增高;到2ka B.P.时,磁化率和红度出现异常高值,但总类脂物含量降低。综合各指标分析表明,指标的异常变化可以反映人类活动对环境改造强度的变化、对土地利用方式的改变和社会发展阶段的演变。周原地区在全新世期间的人类活动强度在不断增大,显示出人类从适应环境,到显著影响环境,到成为影响环境变化主要营力的趋势,为理解自然环境与人类发展关系演变提供了参考。

关键词： 古环境; 粒度; 类脂物; 周原黄土; 冷事件

本文引用格式

周璐 , 李玉梅 , 张玉修 , 龙雨佳 , 吴金旭 , 刘浩宇 . 陕西周原黄土粒度和类脂物总量对全新世气候和古人类活动的指示意义^*[J]. 中国科学院大学学报, 0 : 2025066 -2025066 . DOI: 10.7523/j.ucas.2025.065

Abstract

This study reconstructs the Holocene paleoenvironment of the Licun profile through a comprehensive analysis of multiple indicators including magnetic susceptibility, grain size, color, and total lipid content, and explores its relationship with paleo-human activities. The study indicate that these indicators clearly document climatic shifts since the Last Glacial Period, including cooling event during the mid-to-late Holocene. At 6 ka B.P., grain size at the Licun profile increased and exhibited abrupt changes compared to the Liangcun profile. At 2.8 ka B.P., total lipid content showed an abnormal increase. At 2 ka B.P., magnetic susceptibility and redness reached abnormally high values, while total lipid content decreased. Comprehensive analysis of these indicators reveals that their anomalous variations reflect changes in the intensity of human environmental modification, alterations in land use patterns, and the evolution of societal development stages. The intensity of human activity in the Zhouyuan region steadily increased throughout the Holocene, demonstrating a trend from environmental adaptation to significant environmental impact, ultimately becoming the primary driving force behind environmental change. This provides valuable insights into the evolving relationship between the natural environment and human development.

Key words： paleoenvironment; grain size; lipids; Zhouyuan Loess; cold events

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