High-resolution and precisely dated record of weathering and hydrological dynamics recorded by manganese and rare-earth elements in a stalagmite from Central China

被引：47

作者：

Zhou, Houyun ^{[1
]}

Chi, Baoquan ^{[1
]}

Lawrence, Michael ^{[2
]}

Zhao, Jianxin ^{[2
]}

Yan, Jun ^{[3
]}

Greig, Alan

Feng, Yuexing ^{[2
]}

机构：

[1] Chinese Acad Sci, Guangzhou Inst Geochem, Guangzhou 510640, Peoples R China

[2] Univ Queensland, Ctr Microscopy & Microanal, Radiogen Isotope Lab, Brisbane, Qld 4072, Australia

[3] Hefei Univ Technol, Sch Resources & Environm Engn, Hefei 230009, Peoples R China

来源：

QUATERNARY RESEARCH | 2008年 / 69卷 / 03期

基金：

中国国家自然科学基金;

关键词：

Mn; REEs; speleothem; weathering; hydrology; East Asia; summer monsoon;

D O I：

10.1016/j.yqres.2008.02.005

中图分类号：

P9 [自然地理学];

学科分类号：

0705 ; 070501 ;

摘要：

Manganese (Mn) and rare-earth elements (REEs) in a stalagmite (SJ3) collected from Central China were analyzed, using an ICP-MS method for the precise determination of >40 trace elements in geological samples by enriched-isotope internal standardization. Unlike speleothem Mn and REEs investigated by cathodoluminescence, which may be incorporated into crystal lattice, the Mn and REEs analyzed in SJ3 should come largely from colloidal and particle phases in groundwater and may be associated with non-carbonate inclusions. The Mn and REEs in SJ3 vary significantly during the period between 20 and 10 ka. These elements show remarkable increases since similar to 14.5 ka, suggesting enhanced weathering of the overlying soil layer and the host rock since the onset of the last deglaciation and the strengthening of the Asian summer monsoon. In addition, the Mn and REEs in SJ3 display significant centennial fluctuations which may reflect groundwater dynamics. (C) 2008 University of Washington. All rights reserved.

引用

页码：438 / 446

页数：9

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