Statistical analysis on secular records of igneous geochemistry: Implication for the early Archean plate tectonics

doi:10.1002/gj.3484

	Statistical analysis on secular records of igneous geochemistry: Implication for the early Archean plate tectonics
	Liu, He 1,2,3; Sun, Wei-dong1,2,3 ; Deng, Jianghong 1,2,3
	2020
发表期刊	GEOLOGICAL JOURNAL
ISSN	0072-1050
卷号	55 期号:1 页码:994-1002
通讯作者	Sun, Wei-dong(weidongsun@qdio.ac.cn)
摘要	In recent years, application of statistical analysis to a sufficiently large geochemical database has become more and more popular to reveal the onset and evolution of plate tectonics as a consequence of the development of computer science and storage technology. Here, we introduce a robust statistical method to process a filtered geochemical dataset including predominantly continental basaltic rocks through Earth's history. The results show that the average Sr concentrations gradually increased from 3.8 to 0 Ga, indicating a progressively growing depth of magma source as a result of secular cooling of the mantle. However, the average La/Yb and Sm/Yb ratios only started to increase at ca. 3.0 Ga. Considering the La-Yb and Sm-Yb fractionations are commonly attributed to the residual garnet crystallization, we interpreted that the geotherm of the magma source of continental basaltic rocks before 3.0 Ga might be higher than the stability limit of garnet. As such, there were little or no garnets in the residue during partial melting of the upwelling asthenospheric mantle or mantle plumes before 3.0 Ga, which also implied a higher continental geotherm during that time. Such a high geotherm could not support the formation of contemporaneous high-pressure or medium-pressure TTGs (tonalite-trondhjemite-granodiorite) by vertical tectonic models associated with upwelling mantle heating or delaminated lower crust melting in the early Archean. We therefore conclude that the plate tectonics had occurred by ca. 3.8 Ga in a hot subduction style and contributed to the formations of high- and medium-pressure TTGs subsequently.
关键词	continental basaltic rocks garnet geotherm plate tectonics statistical analysis
DOI	10.1002/gj.3484
收录类别	SCI
语种	英语
资助项目	NSFC[41473029] ; NSFC[41421062] ; NSFC[91328204] ; CAS[XDB18020000] ; MOST of China[2016YFC0600408] ; NSFC[41473029] ; NSFC[41421062] ; NSFC[91328204] ; CAS[XDB18020000] ; MOST of China[2016YFC0600408]
WOS研究方向	Geology
WOS类目	Geosciences, Multidisciplinary
WOS记录号	WOS:000508025400057
出版者	WILEY
引用统计	被引频次：11[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/164416
专题	深海极端环境与生命过程研究中心
通讯作者	Sun, Wei-dong
作者单位	1.Chinese Acad Sci, Inst Oceanol, Ctr Deep Sea Res, Qingdao 266071, Peoples R China 2.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Mineral Resources, Qingdao, Peoples R China 3.Chinese Acad Sci, Ctr Ocean Megasci, Qingdao, Peoples R China
第一作者单位	深海极端环境与生命过程研究中心; 中国科学院海洋大科学研究中心
通讯作者单位	深海极端环境与生命过程研究中心; 中国科学院海洋大科学研究中心
推荐引用方式 GB/T 7714	Liu, He,Sun, Wei-dong,Deng, Jianghong. Statistical analysis on secular records of igneous geochemistry: Implication for the early Archean plate tectonics[J]. GEOLOGICAL JOURNAL,2020,55(1):994-1002.
APA	Liu, He,Sun, Wei-dong,&Deng, Jianghong.(2020).Statistical analysis on secular records of igneous geochemistry: Implication for the early Archean plate tectonics.GEOLOGICAL JOURNAL,55(1),994-1002.
MLA	Liu, He,et al."Statistical analysis on secular records of igneous geochemistry: Implication for the early Archean plate tectonics".GEOLOGICAL JOURNAL 55.1(2020):994-1002.

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