Alkali-carbonate melts in the cratonic mantle evidenced by a wehrlite xenolith from the Majuagaa kimberlite, West Greenland
文献类型：期刊论文
| 作者 | Kiseeva, Ekaterina S.6,7; Kamenetsky, Vadim S.4,5; Chayka, Ivan F.3; Maas, Roland2; Nielsen, Troels F. D.1 |
| 刊名 | GEOLOGY
 |
| 出版日期 | 2024-10-09 |
| 页码 | 5 |
| ISSN号 | 0091-7613 |
| DOI | 10.1130/G52274.1 |
| 通讯作者 | Kiseeva, Ekaterina S.(kkiseeva@amnh.org) |
| 英文摘要 | Carbonate melts are critically important for the deep carbon cycle, mantle melting, redox reactions, and transport of highly incompatible elements. The presence of carbonate melts in the cratonic mantle has been inferred from experimental studies, metasomatic transformations, and melt/fluid inclusions in xenoliths, kimberlites, and diamonds. However, the exact composition of such melts is difficult to determine due to their ephemeral nature and highly reactive properties. Once formed, they migrate away from the source and react with silicate mantle minerals, especially orthopyroxene, causing mantle metasomatism. Wehrlite is one of the products of interaction between the carbonate melt and peridotitic mantle and hence is an excellent candidate for locating in situ carbonate melts. Here, we report petrological, geochemical, and melt inclusion data for a garnet wehrlite xenolith in the Majuagaa kimberlite dike, West Greenland. The xenolith, which last equilibrated with the mantle at 4.5 GPa and 1000 degrees C, contains abundant melt pools composed of dolomite, calcite, serpentine, spinel, apatite, and phlogopite. Although the original magmatic mineralogy was largely destroyed by low-temperature alteration, remnants of the crystallized carbonatitic melt are preserved as primary melt inclusions in the liquidus Ti-Mg-Fe spinel. These melt inclusions, composed of carbonates, alkali carbonates, periclase/ brucite, and minor halides, K-sulfide, apatite, and phlogopite, are the first direct evidence for in situ alkali-carbonate melt in the deep cratonic mantle. Compositionally, they are very similar to primary Na-dolomite melt found in experiments and in fluid inclusions within diamonds. |
| WOS关键词 | LIQUID IMMISCIBILITY ; METASOMATISM ; SILICATE ; RICH ; GPA |
| 资助项目 | Natural Environment Research Coun- cil (NERC)[NE/L010828/1] ; Irish Research Council[IRCLA/2022/2638] ; Chinese Academy of Sciences[FMUF-2022-0004] ; Russian Academy of Sciences |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:001331966600001 |
| 出版者 | GEOLOGICAL SOC AMER, INC |
| 源URL | [http://ir.qdio.ac.cn/handle/337002/199300]  |
| 专题 | 海洋研究所_深海极端环境与生命过程研究中心 |
| 通讯作者 | Kiseeva, Ekaterina S. |
| 作者单位 | 1.Geol Survey Denmark & Greenland, Alster Voldgade 10, DK-1350 Copenhagen K, Denmark 2.Univ Melbourne, Sch Geog Earth & Atmospher Sci, Parkville, Vic 3010, Australia 3.DS Korzhinskii Inst Expt Mineral, Chernogolovka 142432, Russia 4.Inst Volcanol & Seismol, Petropavlovsk Kamchatski 683006, Russia 5.Chinese Acad Sci, Inst Oceanol, Ctr Deep Sea Res, Qingdao 266003, Peoples R China 6.Univ Coll Cork, Sch Biol Earth & Environm Sci, Cork T23 TK30, Ireland 7.Amer Museum Nat Hist, New York, NY 10024 USA |
| 推荐引用方式 GB/T 7714 | Kiseeva, Ekaterina S.,Kamenetsky, Vadim S.,Chayka, Ivan F.,et al. Alkali-carbonate melts in the cratonic mantle evidenced by a wehrlite xenolith from the Majuagaa kimberlite, West Greenland[J]. GEOLOGY,2024:5. |
| APA | Kiseeva, Ekaterina S.,Kamenetsky, Vadim S.,Chayka, Ivan F.,Maas, Roland,&Nielsen, Troels F. D..(2024).Alkali-carbonate melts in the cratonic mantle evidenced by a wehrlite xenolith from the Majuagaa kimberlite, West Greenland.GEOLOGY,5. |
| MLA | Kiseeva, Ekaterina S.,et al."Alkali-carbonate melts in the cratonic mantle evidenced by a wehrlite xenolith from the Majuagaa kimberlite, West Greenland".GEOLOGY (2024):5. |
入库方式： OAI收割
来源：海洋研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。