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A record of spontaneous subduction initiation in the Izu-Bonin-Mariana arc
文献类型：期刊论文
| 作者 | Arculus, Richard J.1; Ishizuka, Osamu2,3; Bogus, Kara A.4; Gurnis, Michael5; Hickey-Vargas, Rosemary6; Aljahdali, Mohammed H.7; Bandini-Maeder, Alexandre N.8; Barth, Andrew P.9; Brandl, Philipp A.1,10; Drab, Laureen11 |
| 刊名 | NATURE GEOSCIENCE
 |
| 出版日期 | 2015-09-01 |
| 卷号 | 8期号:9页码:728-733 |
| 英文摘要 | The initiation of tectonic plate subduction into the mantle is poorly understood. If subduction is induced by the push of a distant mid-ocean ridge or subducted slab pull, we expect compression and uplift of the overriding plate. In contrast, spontaneous subduction initiation, driven by subsidence of dense lithosphere along faults adjacent to buoyant lithosphere, would result in extension and magmatism. The rock record of subduction initiation is typically obscured by younger deposits, so evaluating these possibilities has proved elusive. Here we analyse the geochemical characteristics of igneous basement rocks and overlying sediments, sampled from the Amami Sankaku Basin in the northwest Philippine Sea. The uppermost basement rocks are areally widespread and supplied via dykes. They are similar in composition and age-as constrained by the biostratigraphy of the overlying sediments-to the 52-48-million-year-old basalts in the adjacent Izu-Bonin-Mariana fore-arc. The geochemical characteristics of the basement lavas indicate that a component of subducted lithosphere was involved in their genesis, and the lavas were derived from mantle source rocks that were more melt-depleted than those tapped at mid-ocean ridges. We propose that the basement lavas formed during the inception of Izu-Bonin-Mariana subduction in a mode consistent with the spontaneous initiation of subduction. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000360392000020 |
| 源URL | [http://ir.qdio.ac.cn/handle/337002/50262]  |
| 专题 | 海洋研究所_海洋地质与环境重点实验室 |
| 作者单位 | 1.Australian Natl Univ, Res Sch Earth Sci, Canberra, ACT 2601, Australia 2.Geol Survey Japan AIST, Tsukuba, Ibaraki 3058567, Japan 3.Japan Agcy Marine Earth Sci & Technol, Res & Dev Ctr Ocean Drilling Sci, Yokosuka, Kanagawa 2370061, Japan 4.Texas A&M Univ, Int Ocean Discovery Program, College Stn, TX 77845 USA 5.CALTECH, Div Geol & Planetary Sci, Pasadena, CA 91125 USA 6.Florida Int Univ, Earth & Environm Dept, Miami, FL 33199 USA 7.Florida State Univ, Dept Earth Ocean & Atmospher Sci, Tallahassee, FL 32306 USA 8.Univ Western Australia, Sch Earth & Environm, Ctr Energy Geosci, Perth, WA 6009, Australia 9.Indiana Univ Purdue Univ, Dept Earth Sci, Indianapolis, IN 46202 USA 10.Univ Erlangen Nurnberg, Geozentrum Nordbayern, D-91054 Erlangen, Germany |
| 推荐引用方式 GB/T 7714 | Arculus, Richard J.,Ishizuka, Osamu,Bogus, Kara A.,et al. A record of spontaneous subduction initiation in the Izu-Bonin-Mariana arc[J]. NATURE GEOSCIENCE,2015,8(9):728-733. |
| APA | Arculus, Richard J..,Ishizuka, Osamu.,Bogus, Kara A..,Gurnis, Michael.,Hickey-Vargas, Rosemary.,...&Zhang, Zhaohui.(2015).A record of spontaneous subduction initiation in the Izu-Bonin-Mariana arc.NATURE GEOSCIENCE,8(9),728-733. |
| MLA | Arculus, Richard J.,et al."A record of spontaneous subduction initiation in the Izu-Bonin-Mariana arc".NATURE GEOSCIENCE 8.9(2015):728-733. |
入库方式： OAI收割
来源：海洋研究所
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