气候变化领域集成服务门户(CCPortal): Early evolution of a young back-arc basin in the Havre Trough

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DOI	10.1038/s41561-019-0439-y
	Early evolution of a young back-arc basin in the Havre Trough
	Caratori Tontini F.; Bassett D.; de Ronde C.E.J.; Timm C.; Wysoczanski R.
发表日期	2019
ISSN	17520894
卷号	12 期号:10
英文摘要	Back-arc basins are found at convergent plate boundaries. Nevertheless, they are zones of significant crustal extension that show volcanic and hydrothermal processes somewhat similar to those of mid-ocean ridges. Accepted models imply the initial rifting and thinning of a pre-existing volcanic arc until seafloor spreading gradually develops over timescales of a few million years. The Havre Trough northeast of New Zealand is a unique place on Earth where the early stages of back-arc basin formation are well displayed in the recent geological record. Here we present evidence that, in this region, rifting of the original volcanic arc occurred in a very narrow area about 10–15 km wide, which could only accommodate minimal stretching for a very short time before mass balance required oceanic crustal accretion. An initial burst of seafloor spreading started around 5.5–5.0 million years ago and concluded abruptly about 3.0–2.5 million years ago, after which arc magmatism dominated the crustal accretion. The sudden transition between these different tectonomagmatic regimes is linked to trench rollback promoted by gradual sinking of the subducting lithosphere, which could have diverted the arc flux outside the region of seafloor spreading and induced the vertical realignment of surface volcanism with the source of arc melts at depth. © 2019, The Author(s), under exclusive licence to Springer Nature Limited.
语种	英语
scopus关键词	acceleration; backarc basin; basin evolution; extensional tectonics; mass balance; mid-ocean ridge; plate boundary; plate convergence; seafloor spreading; subduction; volcanism; New Zealand
来源期刊	Nature Geoscience
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/124588
作者单位	GNS Science, Lower Hutt, New Zealand; GEOMAR, Helmholtz Centre for Ocean Research, Kiel, Germany; NIWA, Wellington, New Zealand
推荐引用方式 GB/T 7714	Caratori Tontini F.,Bassett D.,de Ronde C.E.J.,et al. Early evolution of a young back-arc basin in the Havre Trough[J],2019,12(10).
APA	Caratori Tontini F.,Bassett D.,de Ronde C.E.J.,Timm C.,&Wysoczanski R..(2019).Early evolution of a young back-arc basin in the Havre Trough.Nature Geoscience,12(10).
MLA	Caratori Tontini F.,et al."Early evolution of a young back-arc basin in the Havre Trough".Nature Geoscience 12.10(2019).