| Talc-bearing serpentinized peridotites from the southern Mariana forearc: implications for aseismic character within subduction zones | |
| Wang Xiaomei1,2; Zeng Zhigang1; Liu Changhua1; Chen Junbing3; Yin Xuebo1; Wang Xiaoyuan1; Chen Daigeng1,2; Zhang Guoliang1,2; Chen Shuai1,2; Li Kang1,2; Ouyang Hegen1,2 | |
| 2009-08-01 | |
| 发表期刊 | CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY
 |
| ISSN | 0254-4059 |
| 卷号 | 27期号:3页码:667-673 |
| 文章类型 | Article |
| 摘要 | The serpentinized peridotites overlying the subducted zones in the Izu-Bonin-Mariana (IBM) arc system have been interpret as the cause of the low-velocity layer identified beneath the IBM froearc, in turn few earthquakes occurred along the plate boundary. Chrysotile, which is a low temperature and highly hydrated phase of serpentine with low frictional strength, has been suggested as the low velocity material in the serpentinized peridotites, besides, brucite is inferred to be likely conducive to stable sliding. However, such idea encounters challenging in our serpentinized peridotites from the southern Mariana forearc, which absent both the above minerals. The presence of talc, which characterized by its weak, low-friction and inherently stable sliding behavior, provides new clue. Here we report the occurrence of talc in serpentinized peridotites collected from the landward trench slope of the southern Mariana forearc. We infer that talc is mainly forming as a result of the reaction of serpentine minerals with silica-saturated fluids released from the subducting slab, and talc also occurs as talc veins sometimes. Due to its unique physical properties, talc may therefore play a significant role in aseismic slip in the IBM subduction zone.; The serpentinized peridotites overlying the subducted zones in the Izu-Bonin-Mariana (IBM) arc system have been interpret as the cause of the low-velocity layer identified beneath the IBM froearc, in turn few earthquakes occurred along the plate boundary. Chrysotile, which is a low temperature and highly hydrated phase of serpentine with low frictional strength, has been suggested as the low velocity material in the serpentinized peridotites, besides, brucite is inferred to be likely conducive to stable sliding. However, such idea encounters challenging in our serpentinized peridotites from the southern Mariana forearc, which absent both the above minerals. The presence of talc, which characterized by its weak, low-friction and inherently stable sliding behavior, provides new clue. Here we report the occurrence of talc in serpentinized peridotites collected from the landward trench slope of the southern Mariana forearc. We infer that talc is mainly forming as a result of the reaction of serpentine minerals with silica-saturated fluids released from the subducting slab, and talc also occurs as talc veins sometimes. Due to its unique physical properties, talc may therefore play a significant role in aseismic slip in the IBM subduction zone. |
| 关键词 | Talc Serpentinized Peridotites Mariana Aseismic Subduction Zone |
| 学科领域 | Limnology ; Oceanography |
| DOI | 10.1007/s00343-009-9207-y |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000270742000035 |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.qdio.ac.cn/handle/337002/3706 |
| 专题 | 海洋地质与环境重点实验室 |
| 作者单位 | 1.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Geol & Environm, Qingdao 266071, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China 3.Zhejiang Geol Prospecting Bur, Ningbo 315012, Zhejiang, Peoples R China |
| 第一作者单位 | 中国科学院海洋研究所 |
| 推荐引用方式 GB/T 7714 | Wang Xiaomei,Zeng Zhigang,Liu Changhua,et al. Talc-bearing serpentinized peridotites from the southern Mariana forearc: implications for aseismic character within subduction zones[J]. CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY,2009,27(3):667-673. |
| APA | Wang Xiaomei.,Zeng Zhigang.,Liu Changhua.,Chen Junbing.,Yin Xuebo.,...&Ouyang Hegen.(2009).Talc-bearing serpentinized peridotites from the southern Mariana forearc: implications for aseismic character within subduction zones.CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY,27(3),667-673. |
| MLA | Wang Xiaomei,et al."Talc-bearing serpentinized peridotites from the southern Mariana forearc: implications for aseismic character within subduction zones".CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY 27.3(2009):667-673. |
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