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DOI | 10.1038/s41561-018-0209-2 |
Forced subduction initiation recorded in the sole and crust of the Semail Ophiolite of Oman | |
Guilmette, Carl1; Smit, Matthijs A.2; van Hinsbergen, Douwe J. J.3; Gurer, Derya3; Corfu, Fernando4,5; Charette, Benoit6; Maffione, Marco7; Rabeau, Olivier1; Savard, Dany8 | |
2018-09-01 | |
发表期刊 | NATURE GEOSCIENCE |
ISSN | 1752-0894 |
EISSN | 1752-0908 |
出版年 | 2018 |
卷号 | 11期号:9页码:688-+ |
文章类型 | Article |
语种 | 英语 |
国家 | Canada; Netherlands; Norway; England |
英文摘要 | Subduction zones are unique to Earth and fundamental in its evolution, yet we still know little about the causes and mechanisms of their initiation. Numerical models show that far-field forcing may cause subduction initiation at weak pre-existing structures, while inferences from modern subduction zones suggest initiation through spontaneous lithospheric gravitational collapse. For both endmembers, the timing of subduction inception corresponds with initial lower plate burial, whereas coeval or delayed extension in the upper plate are diagnostic of spontaneous or forced subduction initiation, respectively. In modern systems, the earliest extension-related upper plate rocks are found in forearcs, but lower plate rocks that recorded initial burial have been subducted and are inaccessible. Here, we investigate a fossil system, the archetypal Semail Ophiolite of Oman, which exposes both lower and upper plate relics of incipient subduction stages. We show with Lu-Hf and U-Pb geochronology of the lower and upper plate material that initial burial of the lower plate occurred before 104 million years ago, predating upper plate extension and the formation of Semail oceanic crust by at least 8 Myr. Such a time lag reveals far-field forced subduction initiation and provides unequivocal, direct evidence for a subduction initiation mechanism in the geological record. |
领域 | 地球科学 ; 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000443302900018 |
WOS关键词 | PB ZIRCON GEOCHRONOLOGY ; IZU-BONIN-MARIANA ; METAMORPHIC SOLE ; LU-HF ; GARNET GEOCHRONOLOGY ; OCEANIC LITHOSPHERE ; RAPID EMPLACEMENT ; ROCK SAMPLES ; SHEAR ZONES ; ICP-MS |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/35093 |
专题 | 地球科学 气候变化 |
作者单位 | 1.Univ Laval, Dept Geol & Genie Geol, E4m, Quebec City, PQ, Canada; 2.Univ British Columbia, Dept Earth Ocean & Atmospher Sci, Vancouver, BC, Canada; 3.Univ Utrecht, Dept Earth Sci, Utrecht, Netherlands; 4.Univ Oslo, Dept Geosci, Oslo, Norway; 5.Univ Oslo, CEED, Oslo, Norway; 6.Univ Waterloo, Dept Earth & Environm Sci, Waterloo, ON, Canada; 7.Univ Birmingham, Sch Geog Earth & Environm Sci, Birmingham, W Midlands, England; 8.Univ Quebec Chicoutimi, Dept Genie Geol, LabMaTer, Chicoutimi, PQ, Canada |
推荐引用方式 GB/T 7714 | Guilmette, Carl,Smit, Matthijs A.,van Hinsbergen, Douwe J. J.,et al. Forced subduction initiation recorded in the sole and crust of the Semail Ophiolite of Oman[J]. NATURE GEOSCIENCE,2018,11(9):688-+. |
APA | Guilmette, Carl.,Smit, Matthijs A..,van Hinsbergen, Douwe J. J..,Gurer, Derya.,Corfu, Fernando.,...&Savard, Dany.(2018).Forced subduction initiation recorded in the sole and crust of the Semail Ophiolite of Oman.NATURE GEOSCIENCE,11(9),688-+. |
MLA | Guilmette, Carl,et al."Forced subduction initiation recorded in the sole and crust of the Semail Ophiolite of Oman".NATURE GEOSCIENCE 11.9(2018):688-+. |
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