Modern ocean island basalt-like 182W signature in Paleoarchean mafic rocks: Implications for the generation, preservation, and destruction of early mantle heterogeneities
文献类型：期刊论文
| 作者 | Mei, Qing-Feng5; Yang, Jin-Hui4,5; Li, Chao-Feng5; Wang, Xuan-Ce3; Konnunaho, Jukka2; Wu, Ya-Dong5; Zhong, Hong1; Xu, Yi-Gang6; Wang, Hao5 |
| 刊名 | GEOLOGY
 |
| 出版日期 | 2023-10-01 |
| 卷号 | 51期号:10页码:919-923 |
| ISSN号 | 0091-7613 |
| DOI | 10.1130/G51354.1 |
| 英文摘要 | Komatiites and picrites generated by high degrees of mantle partial melting serve as potential probes of Earth's deep mantle. Tungsten (W) isotopes in these rocks offer a rare chance to better understand early differentiation, late accretion, core-mantle interaction, and subsequent evolution of Earth's mantle. We present new W isotope data for Archean komatiites and basalts from the Barberton (South Africa) and Suomussalmi (Finland) Greenstone Belts and Permian picrites from the Emeishan large igneous province (China). The Paleoarchean samples from the Barberton Greenstone Belt have modern ocean island basalt (OIB)-like mu 182W values ranging from -20.4 to +5.6, whereas the Mesoarchean komatiites from the Suomussalmi Greenstone Belt show mu 182W values of -2.2 to +11.3. The Permian Emeishan picrites give mu 182W values of -7.1 to +3.1. Our data, combined with the published global data set, show that W isotope heterogeneity in the mantle has existed throughout Earth's history, with positive mu 182W values transitioning to near-zero in the upper mantle by the end of the Archean. The negative mu 182W values of Paleoarchean samples in the Barberton Greenstone Belt and modern OIBs likely result from either early differentiation or core-mantle interaction. The incorporation of a plume-delivered negative mu 182W component and enhanced mantle mixing is a viable mechanism to explain the transition of mu 182W values in the upper mantle from positive to near-zero, while recycling of crustal materials into the mantle would result in a shift of negative mu 182W values of the lower mantle closer to zero since the onset of plate tectonics. The latter process could possibly explain the slightly negative to near-zero mu 182W values of the Emeishan picrites and some kimberlites. The well-resolved negative mu 182W anomalies observed in this study provide important insights into the generation, preservation, and obliteration of W isotope heterogeneities in the lower mantle. |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:001108085300006 |
| 源URL | [http://ir.gig.ac.cn/handle/344008/76143]  |
| 专题 | 同位素地球化学国家重点实验室 |
| 通讯作者 | Yang, Jin-Hui |
| 作者单位 | 1.Chinese Acad Sci, State Key Lab Ore Deposit Geochem, Inst Geochem, Guiyang 550002, Peoples R China 2.Geol Survey Finland, POB 77, Rovaniemi 96101, Finland 3.Yunnan Univ, Sch Earth Sci, Kunming 650500, Peoples R China 4.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing 100049, Peoples R China 5.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China 6.Chinese Acad Sci, State Key Lab Isotope Geochem, Guangzhou Inst Geochem, Guangzhou 510640, Peoples R China |
| 推荐引用方式 GB/T 7714 | Mei, Qing-Feng,Yang, Jin-Hui,Li, Chao-Feng,et al. Modern ocean island basalt-like 182W signature in Paleoarchean mafic rocks: Implications for the generation, preservation, and destruction of early mantle heterogeneities[J]. GEOLOGY,2023,51(10):919-923. |
| APA | Mei, Qing-Feng.,Yang, Jin-Hui.,Li, Chao-Feng.,Wang, Xuan-Ce.,Konnunaho, Jukka.,...&Wang, Hao.(2023).Modern ocean island basalt-like 182W signature in Paleoarchean mafic rocks: Implications for the generation, preservation, and destruction of early mantle heterogeneities.GEOLOGY,51(10),919-923. |
| MLA | Mei, Qing-Feng,et al."Modern ocean island basalt-like 182W signature in Paleoarchean mafic rocks: Implications for the generation, preservation, and destruction of early mantle heterogeneities".GEOLOGY 51.10(2023):919-923. |
入库方式： OAI收割
来源：广州地球化学研究所
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