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DOI | 10.1073/pnas.1809164116 |
Titanium isotopes as a tracer for the plume or island arc affinity of felsic rocks | |
Deng, Zhengbin1; Chaussidon, Marc1; Savage, Paul2; Robert, Francois3; Pik, Raphael4; Moynier, Frederic1,5 | |
2019 | |
发表期刊 | PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
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ISSN | 0027-8424 |
出版年 | 2019 |
卷号 | 116期号:4页码:1132-1135 |
文章类型 | Article |
语种 | 英语 |
国家 | France; Scotland |
英文摘要 | Indirect evidence for the presence of a felsic continental crust, such as the elevated Ti-49/Ti-47 ratios in Archean shales, has been used to argue for ongoing subduction at that time and therefore plate tectonics. However, rocks of intermediate to felsic compositions can be produced in both plume and island arc settings. The fact that Ti behaves differently during magma differentiation in these two geological settings might result in contrasting isotopic signatures. Here, we demonstrate that, at a given SiO2 content, evolved plume rocks (tholeiitic) are more isotopically fractionated in Ti than differentiated island arc rocks (mainly calc-alkaline). We also show that the erosion of crustal rocks from whether plumes (mafic in average) or island arcs (intermediate in average) can all produce sediments having quite constant Ti-49/Ti-47 ratios being 0.1-0.3 per mille heavier than that of the mantle. This suggests that Ti isotopes are not a direct tracer for the SiO2 contents of crustal rocks. Ti isotopes in crustal sediments are still a potential proxy to identify the geodynamical settings for the formation of the crust but only if combined with additional SiO2 information. |
英文关键词 | titanium isotopes plume island arc magma differentiation plate tectonics |
领域 | 地球科学 ; 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000456336100012 |
WOS关键词 | CONTINENTAL-CRUST ; PLATE-TECTONICS ; GEOCHEMISTRY ; EVOLUTION ; ICELAND ; EARTH |
WOS类目 | Multidisciplinary Sciences |
WOS研究方向 | Science & Technology - Other Topics |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/205185 |
专题 | 地球科学 资源环境科学 气候变化 |
作者单位 | 1.Univ Paris Diderot, Inst Phys Globe Paris, Univ Sorbonne Paris Cite, CNRS,UMR 7154, F-75005 Paris, France; 2.Univ St Andrews, Sch Earth & Environm Sci, St Andrews KY16 9AL, Fife, Scotland; 3.Museum Natl Hist Nat, Inst Mineral Phys Mat & Cosmochim, UMR 7590, F-75231 Paris 05, France; 4.Univ Lorraine, Ctr Rech Petrograph & Geochim, CNRS, UMR 7358, F-54501 Vandoeuvre Les Nancy, France; 5.Inst Univ France, F-75231 Paris, France |
推荐引用方式 GB/T 7714 | Deng, Zhengbin,Chaussidon, Marc,Savage, Paul,et al. Titanium isotopes as a tracer for the plume or island arc affinity of felsic rocks[J]. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,2019,116(4):1132-1135. |
APA | Deng, Zhengbin,Chaussidon, Marc,Savage, Paul,Robert, Francois,Pik, Raphael,&Moynier, Frederic.(2019).Titanium isotopes as a tracer for the plume or island arc affinity of felsic rocks.PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,116(4),1132-1135. |
MLA | Deng, Zhengbin,et al."Titanium isotopes as a tracer for the plume or island arc affinity of felsic rocks".PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA 116.4(2019):1132-1135. |
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