Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1038/NGEO3010 |
Emergence of silicic continents as the lower crust peels off on a hot plate-tectonic Earth | |
Chowdhury, Priyadarshi1; Gerya, Taras2; Chakraborty, Sumit1 | |
2017-09-01 | |
发表期刊 | NATURE GEOSCIENCE
![]() |
ISSN | 1752-0894 |
EISSN | 1752-0908 |
出版年 | 2017 |
卷号 | 10期号:9 |
文章类型 | Article |
语种 | 英语 |
国家 | Germany; Switzerland |
英文摘要 | The rock record and geochemical evidence indicate that continental recycling has been occurring since the early history of the Earth. The stabilization of felsic continents in place of Earth's early mafic crust about 3.0 to 2.0 billion years ago, perhaps due to the initiation of plate tectonics, implies widespread destruction of mafic crust during this time interval. However, the physical mechanisms of such intense recycling on a hotter, (late) Archaean and presumably plate-tectonic Earth remain largely unknown. Here we use thermomechanical modelling to show that extensive recycling via lower crustal peeling-off (delamination but not eclogitic dripping) during continent-continent convergence was near ubiquitous during the late Archaean to early Proterozoic. We propose that such destruction of the early mafic crust, together with felsic magmatism, may have caused both the emergence of silicic continents and their subsequent isostatic rise, possibly above the sea level. Such changes in the continental character have been proposed to influence the Great Oxidation Event and, therefore, peeling-off plate tectonics could be the geodynamic trigger for this event. A transition to the slab break-off controlled syn-orogenic recycling occurred as the Earth aged and cooled, leading to reduced recycling and enhanced preservation of the continental crust of present-day composition. |
领域 | 地球科学 ; 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000409229600019 |
WOS关键词 | SPONTANEOUS SLAB BREAKOFF ; ACCRETIONARY ; CONSTRAINTS ; EVOLUTION ; OROGENS ; GROWTH ; DELAMINATION ; METAMORPHISM ; DESTRUCTION ; GENERATION |
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/34973 |
专题 | 地球科学 气候变化 |
作者单位 | 1.Ruhr Univ Bochum, Inst Geol Mineral & Geophys, Univ Str 150, D-44801 Bochum, Germany; 2.Swiss Fed Inst Technol Zurich, Dept Earth Sci, Sonneggstr 5, CH-8092 Zurich, Switzerland |
推荐引用方式 GB/T 7714 | Chowdhury, Priyadarshi,Gerya, Taras,Chakraborty, Sumit. Emergence of silicic continents as the lower crust peels off on a hot plate-tectonic Earth[J]. NATURE GEOSCIENCE,2017,10(9). |
APA | Chowdhury, Priyadarshi,Gerya, Taras,&Chakraborty, Sumit.(2017).Emergence of silicic continents as the lower crust peels off on a hot plate-tectonic Earth.NATURE GEOSCIENCE,10(9). |
MLA | Chowdhury, Priyadarshi,et al."Emergence of silicic continents as the lower crust peels off on a hot plate-tectonic Earth".NATURE GEOSCIENCE 10.9(2017). |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论