| Characteristics of silicon and oxygen isotopic compositions of basalts near East Pacific Rise 13 degrees N | |
Wang Xiaoyuan1; Zhao Huijing1,2; Zeng Zhigang1; Yin Xuebo1; Chen Shuai1; Ma Yao1,2 ; Zeng, ZG
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| 2013-12-01 | |
| 发表期刊 | ACTA OCEANOLOGICA SINICA
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| ISSN | 0253-505X |
| 卷号 | 32期号:12页码:104-108 |
| 文章类型 | Article |
| 摘要 | In this study, 13 groups of silicon and oxygen isotopes and major elements of the basalts near the East Pacific Rise 13 degrees N are used to study the fractionation of silicon and oxygen isotopes. Among these data, delta Si-30 values of basalts vary from -0.4 parts per thousand to 0.2 parts per thousand with a mean value of delta Si-30 of (-0.18 +/- 0.22)parts per thousand. The delta O-18 values range from 4.1 parts per thousand to 6.4 parts per thousand with a mean delta O-18 value of (+5.35 +/- 0.73)parts per thousand. Since the delta Si-30 values increase in the series of basalt-basaltic andesite- andesite, and delta O-18 values display a positive correlation with the SiO2 content, we propose that the fractionation of silicon and oxygen isotopes is influenced by the SiO2 content in igneous rocks. Compared with the igneous rocks from Manus Basin with clinopyroxene as their dominant mineral phase, MORBs in this study containing olivine and plagioclase as primary minerals have lower delta O-18 and delta Si-30 values, indicating that the fractionation of silicon and oxygen isotopes is also affected by different Si-O bridges in silicate minerals. Furthermore, our samples from the EPR are defined as E-MORB based on K/Ti ratios. Probably, the difference in delta Si-30 and delta O-18 between our samples and a normal MORB are cause by the enriched components in E-MORBs.; In this study, 13 groups of silicon and oxygen isotopes and major elements of the basalts near the East Pacific Rise 13 degrees N are used to study the fractionation of silicon and oxygen isotopes. Among these data, delta Si-30 values of basalts vary from -0.4 parts per thousand to 0.2 parts per thousand with a mean value of delta Si-30 of (-0.18 +/- 0.22)parts per thousand. The delta O-18 values range from 4.1 parts per thousand to 6.4 parts per thousand with a mean delta O-18 value of (+5.35 +/- 0.73)parts per thousand. Since the delta Si-30 values increase in the series of basalt-basaltic andesite- andesite, and delta O-18 values display a positive correlation with the SiO2 content, we propose that the fractionation of silicon and oxygen isotopes is influenced by the SiO2 content in igneous rocks. Compared with the igneous rocks from Manus Basin with clinopyroxene as their dominant mineral phase, MORBs in this study containing olivine and plagioclase as primary minerals have lower delta O-18 and delta Si-30 values, indicating that the fractionation of silicon and oxygen isotopes is also affected by different Si-O bridges in silicate minerals. Furthermore, our samples from the EPR are defined as E-MORB based on K/Ti ratios. Probably, the difference in delta Si-30 and delta O-18 between our samples and a normal MORB are cause by the enriched components in E-MORBs. |
| 关键词 | Silicon And Oxygen Isotopes Basalt East Pacific Rise Near 13 Degrees n |
| 学科领域 | Oceanography |
| DOI | 10.1007/s13131-013-0396-z |
| URL | 查看原文 |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS研究方向 | Oceanography |
| WOS类目 | Oceanography |
| WOS记录号 | WOS:000328528400013 |
| WOS关键词 | MID-ATLANTIC RIDGE ; PROCESSES BENEATH ; CORE FORMATION ; NAZCA PLATE ; MANTLE ; FRACTIONATION ; HETEROGENEITY ; GEOCHEMISTRY ; SIGNATURES ; EVOLUTION |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.qdio.ac.cn/handle/337002/16292 |
| 专题 | 海洋地质与环境重点实验室 |
| 通讯作者 | Zeng, ZG |
| 作者单位 | 1.Chinese Acad Sci, Inst Oceanol, Seafloor Hydrothermal Activ Lab, Key Lab Marine Geol & Environm, Qingdao 266071, Peoples R China 2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China |
| 第一作者单位 | 中国科学院海洋研究所 |
| 推荐引用方式 GB/T 7714 | Wang Xiaoyuan,Zhao Huijing,Zeng Zhigang,et al. Characteristics of silicon and oxygen isotopic compositions of basalts near East Pacific Rise 13 degrees N[J]. ACTA OCEANOLOGICA SINICA,2013,32(12):104-108. |
| APA | Wang Xiaoyuan.,Zhao Huijing.,Zeng Zhigang.,Yin Xuebo.,Chen Shuai.,...&Zeng, ZG.(2013).Characteristics of silicon and oxygen isotopic compositions of basalts near East Pacific Rise 13 degrees N.ACTA OCEANOLOGICA SINICA,32(12),104-108. |
| MLA | Wang Xiaoyuan,et al."Characteristics of silicon and oxygen isotopic compositions of basalts near East Pacific Rise 13 degrees N".ACTA OCEANOLOGICA SINICA 32.12(2013):104-108. |
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