Pedogenic characteristics of Mituosi profile in the upper Hanjiang river valley and its response to climate change

ZHANG Wentong; PANG Jiangli; ZHOU Yali; HUANG Chunchang; ZHA Xiaochun; WANG Xuejia; WANG Haiyan

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Pedogenic characteristics of Mituosi profile in the upper Hanjiang river valley and its response to climate change

更新时间：2023-12-11

- Pedogenic characteristics of Mituosi profile in the upper Hanjiang river valley and its response to climate change
- Acta Scientiarum Naturalium Universitatis SunYatseni Vol. 56, Issue 6, Pages: 31-37(2017)
- 作者机构：
  
  陕西师范大学旅游与环境学院∥地理学国家级实验教学示范中心,陕西,西安,710062
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published：2017，
  
  Published Online：25 November 2017，
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ZHANG Wentong, PANG Jiangli, ZHOU Yali, et al. Pedogenic characteristics of Mituosi profile in the upper Hanjiang river valley and its response to climate change. [J]. Acta Scientiarum Naturalium Universitatis SunYatseni 56(6):31-37(2017)
DOI：

ZHANG Wentong, PANG Jiangli, ZHOU Yali, et al. Pedogenic characteristics of Mituosi profile in the upper Hanjiang river valley and its response to climate change. [J]. Acta Scientiarum Naturalium Universitatis SunYatseni 56(6):31-37(2017) DOI：

摘要

对汉江上游弥陀寺发现的完整黄土-古土壤剖面进行了沉积学特征以及磁化率、粒度、烧失量和 w(Rb)/w(Sr) 等气候替代性指标的分析及研究，结果表明：弥陀寺剖面自下而上具有马兰黄土(L

)→过渡层黄土(L

)→古土壤层(S

)→近代黄土(L

)→表土层(TS)地层序列，记录了自晚更新世以来的气候变化；不同地层单元之间风化成壤差异显著，古土壤层(S

)的风化成壤强度明显高于其它地层，马兰黄土(L

)的风化成壤强度最弱。剖面风化成壤强度的变化揭示了自马兰黄土堆积以来记录的气候变化，马兰黄土形成时期气候干燥寒冷，过渡层黄土的存在则说明气候由干冷向暖湿转变，古土壤层形成时期气候最为温暖湿润，近代黄土形成时期气候由暖湿向干冷转变。此外，弥陀寺剖面还记录了在全新世大暖期期间的一次气候变冷事件，结合光释光(OSL)测年数据，确定此事件发生于6.48 ka BP左右。

Abstract

The Mituosi(MTS) profile in Yunxian

Hubei of China was served to investigate pedostratigraphy and sedimentary characteristics of the first river terrace of the upper Hanjiang river. Magnetic susceptibility

grainsize distribution

loss on ignition and Rb/Sr were analyzed. The MTS profile recorded the environmental evolution with the stratigraphic series from bottom to top: Malan Loess (L

)→ Transitional Loess (L

)→ Paleosol (S

)→ Holocene Loess (L

)→ Top soil (TS). Different stratigraphic units show different degree of weathering intensity

with S

. The weathering intensity change of MTS profile indicates the climate change since Malan loess accumulation. It was cold and arid with gradually intensified southeast monsoon during the early Holocene. The strongest monsoon occurred in the midHolocene. During the late Holocene

the climate became drying with the monsoon recession. A cold climate event was recorded in MTS profile

dating to around 6.48 Ka BP (OSL dating).

关键词

风化成壤气候变化黄土-古土壤汉江上游

Keywords

pedogenesisclimate changeloess-paleosolupper Hanjiang river

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HUANG Chunchang

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Related Institution

College of Tourism and Environment, Shaanxi Normal University∥National Demonstration Center for Experimental Geography Education

中国科学院研究生院



Department of Earth Sciences, Sun Yat-sen University

Guangdong Provincial Key Lab of Geological Process and Mineral Resources Survey

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