洋岛玄武岩熔体及其来源:来自岩石熔体包裹体和淬火玻璃的证据

IF 1 4区 地球科学 Q3 GEOCHEMISTRY & GEOPHYSICS
V. B. Naumov, A. V. Girnis, V. A. Dorofeeva
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引用次数: 0

摘要

在本文中,我们使用我们定期更新的火成岩矿物和玻璃中的熔体包裹体分析数据库来检查来自海洋岛屿的玄武岩熔体的成分。为全球数据集(来自33个岛屿系统的22 550个分析)和研究最广泛的复合(冰岛、夏威夷、加那利群岛、加拉帕戈斯群岛和留尼汪岛)计算了熔体中主要、痕量和挥发性成分的平均浓度。大多数元素的平均含量介于洋中脊(最贫)和板内大陆杂岩(最富)岩浆的平均组成之间。详细考虑了特定杂岩中元素比例的变化,发现它们可以用枯竭源岩浆和不同富集物质的混合来描述。估算了假定地幔源中微量元素的丰度。枯竭源在冰岛最为明显,几乎与枯竭的地幔相同,后者的融化产生了洋中脊玄武岩。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Melts of Ocean Island Basalts (OIB) and Their Sources: Evidence from Melt Inclusions and Quenched Glasses of Rocks

In this paper, we examine the compositions of basaltic melts from ocean islands using our regularly updated database of analyses of melt inclusions in minerals and glasses of igneous rocks. Mean concentrations of major, trace, and volatile components in melts were calculated for the global dataset (22 550 analyses from 33 island systems) and for the most extensively studied complexes (Iceland, Hawaii, Canaries, Galapagos, and Reunion). It was found that the mean contents of most elements fall between the mean compositions of magmas from mid-ocean ridges (most depleted) and intraplate continental complexes (most enriched). Variations of element ratios in particular complexes were considered in detail, and it was found that they can be described by mixing magmas from a depleted source and variably enriched materials. The abundances of trace elements in the supposed mantle sources were estimated. The depleted source is most clearly manifested in Iceland and is almost identical to the depleted mantle the melting of which produces mid-ocean ridge basalts.

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来源期刊
Petrology
Petrology 地学-地球科学综合
CiteScore
2.40
自引率
20.00%
发文量
27
审稿时长
>12 weeks
期刊介绍: Petrology is a journal of magmatic, metamorphic, and experimental petrology, mineralogy, and geochemistry. The journal offers comprehensive information on all multidisciplinary aspects of theoretical, experimental, and applied petrology. By giving special consideration to studies on the petrography of different regions of the former Soviet Union, Petrology provides readers with a unique opportunity to refine their understanding of the geology of the vast territory of the Eurasian continent. The journal welcomes manuscripts from all countries in the English or Russian language.
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