Mantle wedge exhumation beneath the Dora-Maira (U)HP dome unravelled by local earthquake tomography (Western Alps)
文献类型：期刊论文
| 作者 | Solarino, Stefano1; Malusa, Marco G.2; Eva, Elena1; Guillot, Stephane3; Paul, Anne3; Schwartz, Stephane3; Zhao, Liang4; Aubert, Coralie3; Dumont, Thierry3; Pondrelli, Silvia5 |
| 刊名 | LITHOS
 |
| 出版日期 | 2018 |
| 卷号 | 296页码:623-636 |
| 关键词 | Continental Subduction Ultra-high-pressure Metamorphism Mantle Wedge Exhumation Peridotite Serpentinization Local Earthquake Tomography Western Alps |
| ISSN号 | 0024-4937 |
| DOI | 10.1016/j.lithos.2017.11.035 |
| 文献子类 | Article |
| 英文摘要 | In continental subduction zones, the behaviour of the mantle wedge during exhumation of (ultra)high-pressure [(U)HP] rocks provides a key to distinguish among competing exhumation mechanisms. However, in spite of the relevant implications for understanding orogenic evolution, a high-resolution image of the mantle wedge beneath the Western Alps is still lacking. In order to fill this gap, we perform a detailed analysis of the velocity structure of the Alpine belt beneath the Dora-Maira (U)HP dome, based on local earthquake tomography independently validated by receiver function analysis. Our results point to a composite structure of the mantle wedge above the subducted European lithosphere. We found that the Dora-Maira (U)HP dome lays directly above partly serpentinized peridotites (Vp similar to 7.5 km/s; Vp/Vs = 1.70-1.72), documented from similar to 10 km depth down to the top of the eclogitized lower crust of the European plate. These serpentinized peridotites, possibly formed by fluid release from the subducting European slab to the Alpine mantle wedge, are juxtaposed against dry mantle peridotites of the Adriatic upper plate along an active fault rooted in the lithospheric mantle. We propose that serpentinized mantle-wedge peridotites were exhumed at shallow crustal levels during late Eocene transtensional tectonics, also triggering the rapid exhumation of (U)HP rocks, and were subsequently indented under the Alpine metamorphic wedge in the early Oligocene. Our findings suggest that mantle-wedge exhumation may represent a major feature of the deep structure of exhumed continental subduction zones. The deep orogenic levels here imaged by seismic tomography may be exposed today in older (U)HP belts, where mantle-wedge serpentinites are commonly associated with coesite-bearing continental metamorphic rocks. (C) 2017 Elsevier B.V. All rights reserved. |
| WOS关键词 | ULTRA-HIGH-PRESSURE ; FISSION-TRACK THERMOCHRONOLOGY ; QUEYRAS SCHISTES LUSTRES ; BROSSASCO-ISASCA UNIT ; COESITE-BEARING UNIT ; IVREA-VERBANO ZONE ; SUBDUCTION ZONES ; METAMORPHIC EVOLUTION ; CONTINENTAL SUBDUCTION ; LANZO PERIDOTITE |
| WOS研究方向 | Geochemistry & Geophysics ; Mineralogy |
| 语种 | 英语 |
| WOS记录号 | WOS:000423890600039 |
| 出版者 | ELSEVIER SCIENCE BV |
| 资助机构 | State Key Laboratory of Lithospheric Evolution, China ; State Key Laboratory of Lithospheric Evolution, China ; National Natural Science Foundation of China(41350001) ; National Natural Science Foundation of China(41350001) ; LabEx OSUG@2020 (Investissements d'avenir, France)(ANR10LABX56) ; LabEx OSUG@2020 (Investissements d'avenir, France)(ANR10LABX56) ; State Key Laboratory of Lithospheric Evolution, China ; State Key Laboratory of Lithospheric Evolution, China ; National Natural Science Foundation of China(41350001) ; National Natural Science Foundation of China(41350001) ; LabEx OSUG@2020 (Investissements d'avenir, France)(ANR10LABX56) ; LabEx OSUG@2020 (Investissements d'avenir, France)(ANR10LABX56) ; State Key Laboratory of Lithospheric Evolution, China ; State Key Laboratory of Lithospheric Evolution, China ; National Natural Science Foundation of China(41350001) ; National Natural Science Foundation of China(41350001) ; LabEx OSUG@2020 (Investissements d'avenir, France)(ANR10LABX56) ; LabEx OSUG@2020 (Investissements d'avenir, France)(ANR10LABX56) ; State Key Laboratory of Lithospheric Evolution, China ; State Key Laboratory of Lithospheric Evolution, China ; National Natural Science Foundation of China(41350001) ; National Natural Science Foundation of China(41350001) ; LabEx OSUG@2020 (Investissements d'avenir, France)(ANR10LABX56) ; LabEx OSUG@2020 (Investissements d'avenir, France)(ANR10LABX56) |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/82640]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Solarino, Stefano; Malusa, Marco G. |
| 作者单位 | 1.CNT, Ist Nazl Geofis & Vulcanol, Genoa, Italy 2.Univ Milano Bicocca, Dept Earth & Environm Sci, Milan, Italy 3.Univ Savoie Mt Blanc, Univ Grenoble Alpes, CNRS, IRD,IFSTTAR,ISTerre, Grenoble, France 4.Chinese Acad Sci, Inst Geol & Geophys, Beijing, Peoples R China 5.Ist Nazl Geofis & Vulcanol, Bologna, Italy |
| 推荐引用方式 GB/T 7714 | Solarino, Stefano,Malusa, Marco G.,Eva, Elena,et al. Mantle wedge exhumation beneath the Dora-Maira (U)HP dome unravelled by local earthquake tomography (Western Alps)[J]. LITHOS,2018,296:623-636. |
| APA | Solarino, Stefano.,Malusa, Marco G..,Eva, Elena.,Guillot, Stephane.,Paul, Anne.,...&Zhu, Rixiang.(2018).Mantle wedge exhumation beneath the Dora-Maira (U)HP dome unravelled by local earthquake tomography (Western Alps).LITHOS,296,623-636. |
| MLA | Solarino, Stefano,et al."Mantle wedge exhumation beneath the Dora-Maira (U)HP dome unravelled by local earthquake tomography (Western Alps)".LITHOS 296(2018):623-636. |
入库方式： OAI收割
来源：地质与地球物理研究所
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