广东海洋大学学报2024，Vol.44Issue(1)：103-110,8.DOI:10.3969/j.issn.1673-9159.2024.01.012
琼东海域沉积物元素组成变化揭示的全新世华南地区风化强度演变
Weathering Evolution in the Southern China during the Holocene Revealed by Element Composition Change in Sediment of Qiongdong Sea Area
摘要
Abstract
[Objective]To investigate the change of chemical weathering intensity and its controlling factors in South China since Holocene.[Method]This study used the data of XRF-scanned elements in the sediment core GH7 from the Qiongdong sea area.The principal component PC1 was extracted from major and trace elements to indicate the intensity of chemical weathering in coastal Southern China.[Result and Conclusion]The weathering intensity showed"strong(13.2-7.5 ka BP)-weak(7.5-3.0 ka BP)-strong(3.0-0 ka BP)"pattern since 13.2 ka BP,and abrupt decrease duringthe Younger Dryas,9.2 ka BP and 8.2 ka BP.The PC1 suggested the weathering in coastal Southern China was strong around 3 ka BP,reflecting the maximum rainfall at this time,which might relate to the Inter-Tropical Convergence Zone(ITCZ)southward shift to low altitudes during this period.The spectral analysis for PC1 revealed a periodic change of about 2 ka in the weathering intensity,close to that of El Niño-Southern Oscillation(ENSO),suggesting that chemical weathering changes at the millennial scale may be regulated together by the ITCZ migration and ENSO intensity.关键词
全新世/沉积物/元素/风化强度/琼东海域Key words
Holocene/sediment/elements/weathering intensity/Qiongdong sea area分类
天文与地球科学引用本文复制引用
杨嘉雯,彭诗云,许嘉莉,冯伟家,孔德明..琼东海域沉积物元素组成变化揭示的全新世华南地区风化强度演变[J].广东海洋大学学报,2024,44(1):103-110,8.基金项目
国家重点研发计划(2018YFA0605601) （2018YFA0605601）
广东海洋大学科研启动经费(R17011 （）
060302032101) （）
