Magma-Mush Interactions in the Lower Oceanic Crust: Insights From Atlantis Bank Layered Series (Southwest Indian Ridge)
文献类型：期刊论文
| 作者 | Boulanger, M.1,7; France, L.1; Ferrando, C.1,6; Ildefonse, B.5; Ghosh, B.4; Sanfilippo, A.6; Liu, C. -Z.3; Morishita, T.2; Koepke, J.7; Bruguier, O.5 |
| 刊名 | JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
 |
| 出版日期 | 2021-09-01 |
| 卷号 | 126期号:9页码:29 |
| 关键词 | crystal mush lower oceanic crust magmatic flow magma intrusion reactive porous flow assimilation-fractional crystallization |
| ISSN号 | 2169-9313 |
| DOI | 10.1029/2021JB022331 |
| 英文摘要 | Magma migration and differentiation processes are key to understanding the development and evolution of oceanic magma reservoirs. To provide new quantitative geochemical constraints on these processes, we applied a high-resolution approach to study an interlayered section of the lower oceanic crust sampled at Atlantis Bank, on the (ultra)slow-spreading Southwest Indian Ridge. The section is characterized by sharp grain-size layering between fine- and coarse-grained olivine gabbros that is representative of other layered structures described at the Atlantis Bank oceanic core complex. The textures and fabrics of the layers and the nature of their contacts indicate formation by intrusion of a magma (i.e., crystal-bearing) into an almost solidified coarse-grained mush. Petrographic observations and in situ incompatible trace element signatures indicate that the fine- and coarse-grained layers record reactive porous migration of melts. Widespread reactive porous flow occurred prior to intrusion within the coarse-grained gabbro, producing mineral compositions enriched in incompatible elements. The intrusive fine-grained lithology records a late stage event of localized reactive melt percolation in cm-scale structures, which lead to strong light rare earth elements depletion relative to heavy rare earth elements. In addition, we highlight the occurrence of interactions at the contacts between layers and partial modification in compositions of the intruded lithology. This layered section likely represents a contact between two larger magma bodies emplaced within the lower crust during accretion, where the type of melt migration (intrusion or porous flow) and the modalities of melt percolation (widespread or localized) strongly govern the composition of the crustal lithologies. |
| WOS关键词 | TRACE-ELEMENT ; CORE COMPLEXES ; GABBRO ; CRYSTALLIZATION ; CONSTRAINTS ; LITHOSPHERE ; CHAMBER ; BENEATH ; ORIGIN ; ASSIMILATION |
| 资助项目 | CNRS-INSU ; IODP-France ; French Ministry of Research (MESRI) ; Projekt DEAL |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000703087900054 |
| 出版者 | AMER GEOPHYSICAL UNION |
| 资助机构 | CNRS-INSU ; CNRS-INSU ; IODP-France ; IODP-France ; French Ministry of Research (MESRI) ; French Ministry of Research (MESRI) ; Projekt DEAL ; Projekt DEAL ; CNRS-INSU ; CNRS-INSU ; IODP-France ; IODP-France ; French Ministry of Research (MESRI) ; French Ministry of Research (MESRI) ; Projekt DEAL ; Projekt DEAL ; CNRS-INSU ; CNRS-INSU ; IODP-France ; IODP-France ; French Ministry of Research (MESRI) ; French Ministry of Research (MESRI) ; Projekt DEAL ; Projekt DEAL ; CNRS-INSU ; CNRS-INSU ; IODP-France ; IODP-France ; French Ministry of Research (MESRI) ; French Ministry of Research (MESRI) ; Projekt DEAL ; Projekt DEAL |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/102697]  |
| 专题 | 地质与地球物理研究所_岩石圈演化国家重点实验室 |
| 通讯作者 | Boulanger, M. |
| 作者单位 | 1.Univ Lorraine, CNRS, CRPG, Nancy, France 2.Kanazawa Univ, Coll Sci & Engn, Kanazawa, Ishikawa, Japan 3.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing, Peoples R China 4.Univ Calcutta, Dept Geol, Kolkata, India 5.Univ Montpellier, CNRS, Geosci Montpellier, Montpellier, France 6.Univ Pavia, Dipartimento Sci Terra & Ambiente, Pavia, Italy 7.Leibniz Univ Hannover, Inst Mineral, Hannover, Germany |
| 推荐引用方式 GB/T 7714 | Boulanger, M.,France, L.,Ferrando, C.,et al. Magma-Mush Interactions in the Lower Oceanic Crust: Insights From Atlantis Bank Layered Series (Southwest Indian Ridge)[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,2021,126(9):29. |
| APA | Boulanger, M..,France, L..,Ferrando, C..,Ildefonse, B..,Ghosh, B..,...&Bruguier, O..(2021).Magma-Mush Interactions in the Lower Oceanic Crust: Insights From Atlantis Bank Layered Series (Southwest Indian Ridge).JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,126(9),29. |
| MLA | Boulanger, M.,et al."Magma-Mush Interactions in the Lower Oceanic Crust: Insights From Atlantis Bank Layered Series (Southwest Indian Ridge)".JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH 126.9(2021):29. |
入库方式： OAI收割
来源：地质与地球物理研究所
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