Sr isotope evolution during chemical weathering of granites - impact of relative weathering rates of minerals
文献类型：期刊论文
| 作者 | Ma, YJ; Liu, CQ |
| 刊名 | SCIENCE IN CHINA SERIES D-EARTH SCIENCES
 |
| 出版日期 | 2001-08-01 |
| 卷号 | 44期号:8页码:726-734 |
| 关键词 | Sr isotope chemical weathering weathering rate non-stoichiometry granite |
| ISSN号 | 1006-9313 |
| 文献子类 | Article |
| 英文摘要 | The Sr isotopic systematics in the weathering profiles of biotite granite and granite porphyry in southern Jiangxi Province were investigated. The results showed that during the chemical weathering of granites, remarked fractionation occurred between Rb and Sr. During the early stages of chemical weathering of granites, the released Sr/Si and Sr/Ca ratios are larger than those of the parent rocks, and the leaching rate of Sr is higher than those of Si, Ca, K, Rb, etc. Dynamic variations in relative weathering rates of the main Sr-contributing minerals led to fluctuation with time in Sr-87/Sr-66 ratios of inherent and released Sr in the weathering crust of granite. Successive weathering of biotite, plagioclase and K-feldspar made Sr-87/Sr-66 ratios in the weathering residues show such a fluctuation trend as to decrease first, increase, and then decrease again till they maintain stable. This work further indicates that when Sr isotopes are used to trace biogeochemical processes on both the catchment and global scales, one must seriously take account of the preferential release of Sr from dissolving solid phase and the fluctuation of Sr-87/Sr-66 ratios caused by the variations of relative weathering rates of Sr-contributing minerals. |
| WOS关键词 | SOIL CHRONOSEQUENCE ; SR-87/SR-86 ; STRONTIUM ; LOESS ; RB ; FELDSPARS ; ALLUVIUM ; RATIOS ; CHINA |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000171966200007 |
| 出版者 | SCIENCE PRESS |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/76887]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Ma, YJ |
| 作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China 2.Chinese Acad Sci, Inst Geochem, Guiyang 550002, Peoples R China |
| 推荐引用方式 GB/T 7714 | Ma, YJ,Liu, CQ. Sr isotope evolution during chemical weathering of granites - impact of relative weathering rates of minerals[J]. SCIENCE IN CHINA SERIES D-EARTH SCIENCES,2001,44(8):726-734. |
| APA | Ma, YJ,&Liu, CQ.(2001).Sr isotope evolution during chemical weathering of granites - impact of relative weathering rates of minerals.SCIENCE IN CHINA SERIES D-EARTH SCIENCES,44(8),726-734. |
| MLA | Ma, YJ,et al."Sr isotope evolution during chemical weathering of granites - impact of relative weathering rates of minerals".SCIENCE IN CHINA SERIES D-EARTH SCIENCES 44.8(2001):726-734. |
入库方式： OAI收割
来源：地质与地球物理研究所
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