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| Trace Elements and Li Isotope Compositions Across the Kamchatka Arc: Constraints on Slab-Derived Fluid Sources | |
| Liu, Haiyang1,2,3,4; Xiao, Yilin1,5; Sun, He1,6; Tong, Fengtai1; Heuser, Alexander7,8; Churikova, Tatiana9; Woerner, Gerhard8 | |
| 2020-05-01 | |
| Source Publication | JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
 |
| ISSN | 2169-9313 |
| Volume | 125Issue:5Pages:18 |
| Abstract | Chalcophile elements and lithium (Li) isotopes were measured on lavas from a 220-km transect across the Kamchatka arc in order to investigate the fluid variations below arc volcanoes and to trace the geochemical behaviour of Li in convergent plate margins. From the Eastern Volcanic Front (EVF), through the Central Kamchatka Depression (CKD), into the Sredinny Range (SR) volcanic zones, chalcophile element ratios (e.g., As/Ce and Sb/Ce) show clear across-arc variations, decreasing (e.g., As/Ce: 0.20 to 0.03 and Sb/Ce: 0.013 to 0.002) with increasing depth above the slab (110 to 400 km). This clearly indicates a gradually decreasing influx of slab-derived fluids added to the mantle wedge as the slab subducts below Kamchatka. In addition, the anomalously high U/Th, La/Sm, and B/Nb ratios in the CKD lavas suggest lawsonite breakdown reaction dominates the fluid release in this area. However, Li/Y (0.07 to 1.78) and delta Li-7 (+1.8 to +5.4 parts per thousand, with an exception of +8.6 parts per thousand in CKD) show limited variations and values similar to the MORB mantle. A dehydration model suggests that slab-derived fluids, which are characterized by high Li concentration and high delta Li-7, do not control the Li budget in Kamchatka arc lavas. Therefore, the isotopic heavy Li from slab-derived fluids likely equilibrates in the sub-arc mantle, which acts as a buffer for Li systematics. In addition, based on the Li isotopic signatures of Klyuchevskoy volcano, our study demonstrates insignificant Li isotopic fractionation during mantle melting and subsequent differentiation. |
| DOI | 10.1029/2019JB019237 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | Qingdao National Laboratory for Marine Science and Technology[2017ASTCP-OS07] ; Chinese Academy of Sciences[XDB18000000] ; Qingdao National Laboratory for Marine Science and Technology[2017ASKJ02] ; China Postdoctoral Science Foundation[2019M652497] ; postdoctoral innovation project of Shandong province ; National Natural Science Foundation of China[41673031] ; National Natural Science Foundation of China[41729001] ; National Natural Science Foundation of China[41903006] ; postdoctoral applied research program of Qingdao City ; Taishan Scholar Program of Shandong[201712075] ; RFBR[20-55-50001] |
| WOS Research Area | Geochemistry & Geophysics |
| WOS Subject | Geochemistry & Geophysics |
| WOS ID | WOS:000562379800042 |
| Publisher | AMER GEOPHYSICAL UNION |
| Citation statistics | |
| Document Type | 期刊论文 |
| Version | 出版稿 |
| Identifier | http://ir.qdio.ac.cn/handle/337002/168316 |
| Collection | 深海极端环境与生命过程研究中心 |
| Corresponding Author | Xiao, Yilin |
| Affiliation | 1.Univ Sci & Technol China, Sch Earth & Space Sci, CAS Key Lab Crust Mantle & Environm, Hefei, Peoples R China 2.Pilot Natl Lab Marine Sci & Technol Qingdao, Lab Marine Mineral Resources, Qingdao, Peoples R China 3.Chinese Acad Sci, Ctr Deep Sea Res, Inst Oceanol, Qingdao, Peoples R China 4.Chinese Acad Sci, Ctr Ocean Megasci, Qingdao, Peoples R China 5.CAS Ctr Excellence Comparat Planetol, Hefei, Peoples R China 6.Llefei Univ Technol, Sch Resources & Environm Engn, Hefei, Peoples R China 7.Helmholtz Ctr Ocean Res Kiel, Div Marine Geosyst Kid, Kiel, Germany 8.Univ Gottingen, Geowissensch Zentrum, Gottingen, Germany 9.Russian Acad Sci, Inst Volcanol & Seismol, Far East Branch, Petropavlovsk Kamchatski, Russia |
| First Author Affilication | Institute of Oceanology, Chinese Academy of Sciences; Center for Ocean Mega-Science, Chinese Academy of Sciences |
| Recommended Citation GB/T 7714 | Liu, Haiyang,Xiao, Yilin,Sun, He,et al. Trace Elements and Li Isotope Compositions Across the Kamchatka Arc: Constraints on Slab-Derived Fluid Sources[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,2020,125(5):18. |
| APA | Liu, Haiyang.,Xiao, Yilin.,Sun, He.,Tong, Fengtai.,Heuser, Alexander.,...&Woerner, Gerhard.(2020).Trace Elements and Li Isotope Compositions Across the Kamchatka Arc: Constraints on Slab-Derived Fluid Sources.JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,125(5),18. |
| MLA | Liu, Haiyang,et al."Trace Elements and Li Isotope Compositions Across the Kamchatka Arc: Constraints on Slab-Derived Fluid Sources".JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH 125.5(2020):18. |
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