The spatial distribution characteristics of Nb–Ta of mafic rocks in subduction zones

High field-strength elements have been regarded as one of the most important discriminations in subduction zone magma. However, the spatial distribution of Nb and Ta in subduction zone-related rocks has been rarely studied; it is still unclear whether there is a quantitative relationship between the...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Li Weiwei, Ge Can, Wang Fangyue, Sun He, Gu Haiou
Formato:	article
Lenguaje:	EN
Publicado:	De Gruyter 2021
Materias:	mafic rocks nb–ta spatial distribution geochemical characteristics subduction zones Geology QE1-996.5
Acceso en línea:	https://doaj.org/article/302a1d2c243c4d1f9c77cba6e96100ae
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:302a1d2c243c4d1f9c77cba6e96100ae
record_format	dspace
spelling	oai:doaj.org-article:302a1d2c243c4d1f9c77cba6e96100ae2021-12-05T14:10:48ZThe spatial distribution characteristics of Nb–Ta of mafic rocks in subduction zones2391-544710.1515/geo-2020-0242https://doaj.org/article/302a1d2c243c4d1f9c77cba6e96100ae2021-04-01T00:00:00Zhttps://doi.org/10.1515/geo-2020-0242https://doaj.org/toc/2391-5447High field-strength elements have been regarded as one of the most important discriminations in subduction zone magma. However, the spatial distribution of Nb and Ta in subduction zone-related rocks has been rarely studied; it is still unclear whether there is a quantitative relationship between the Nb–Ta concentrations and their subduction distance. In this paper, the Nb–Ta concentrations of mafic rocks in arc tectonic systems were calculated from a statistical perspective based on the combined geophysical model and geochemical database. The results showed a typical spatial distribution pattern. The threshold value of Nb (12.20 ppm) and Ta (0.796 ppm) in arc settings was estimated by a cumulative distribution function, which can be used to determine whether the rock is generated in arc tectonic environment. A probability density function of Nb–Ta contents and related subduction distance has been obtained using kernel function estimation. The Nb–Ta concentrations are exponentially correlated with the subduction distance (<700 km), while the Nb/Ta ratios keep in the range of 12–19. We proposed that the subduction depth, along with the degree of partial melting, and possible crustal contamination might be responsible for the Nb–Ta variation correlation with subduction distances.Li WeiweiGe CanWang FangyueSun HeGu HaiouDe Gruyterarticlemafic rocksnb–taspatial distributiongeochemical characteristicssubduction zonesGeologyQE1-996.5ENOpen Geosciences, Vol 13, Iss 1, Pp 390-400 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	mafic rocks nb–ta spatial distribution geochemical characteristics subduction zones Geology QE1-996.5
spellingShingle	mafic rocks nb–ta spatial distribution geochemical characteristics subduction zones Geology QE1-996.5 Li Weiwei Ge Can Wang Fangyue Sun He Gu Haiou The spatial distribution characteristics of Nb–Ta of mafic rocks in subduction zones
description	High field-strength elements have been regarded as one of the most important discriminations in subduction zone magma. However, the spatial distribution of Nb and Ta in subduction zone-related rocks has been rarely studied; it is still unclear whether there is a quantitative relationship between the Nb–Ta concentrations and their subduction distance. In this paper, the Nb–Ta concentrations of mafic rocks in arc tectonic systems were calculated from a statistical perspective based on the combined geophysical model and geochemical database. The results showed a typical spatial distribution pattern. The threshold value of Nb (12.20 ppm) and Ta (0.796 ppm) in arc settings was estimated by a cumulative distribution function, which can be used to determine whether the rock is generated in arc tectonic environment. A probability density function of Nb–Ta contents and related subduction distance has been obtained using kernel function estimation. The Nb–Ta concentrations are exponentially correlated with the subduction distance (<700 km), while the Nb/Ta ratios keep in the range of 12–19. We proposed that the subduction depth, along with the degree of partial melting, and possible crustal contamination might be responsible for the Nb–Ta variation correlation with subduction distances.
format	article
author	Li Weiwei Ge Can Wang Fangyue Sun He Gu Haiou
author_facet	Li Weiwei Ge Can Wang Fangyue Sun He Gu Haiou
author_sort	Li Weiwei
title	The spatial distribution characteristics of Nb–Ta of mafic rocks in subduction zones
title_short	The spatial distribution characteristics of Nb–Ta of mafic rocks in subduction zones
title_full	The spatial distribution characteristics of Nb–Ta of mafic rocks in subduction zones
title_fullStr	The spatial distribution characteristics of Nb–Ta of mafic rocks in subduction zones
title_full_unstemmed	The spatial distribution characteristics of Nb–Ta of mafic rocks in subduction zones
title_sort	spatial distribution characteristics of nb–ta of mafic rocks in subduction zones
publisher	De Gruyter
publishDate	2021
url	https://doaj.org/article/302a1d2c243c4d1f9c77cba6e96100ae
work_keys_str_mv	AT liweiwei thespatialdistributioncharacteristicsofnbtaofmaficrocksinsubductionzones AT gecan thespatialdistributioncharacteristicsofnbtaofmaficrocksinsubductionzones AT wangfangyue thespatialdistributioncharacteristicsofnbtaofmaficrocksinsubductionzones AT sunhe thespatialdistributioncharacteristicsofnbtaofmaficrocksinsubductionzones AT guhaiou thespatialdistributioncharacteristicsofnbtaofmaficrocksinsubductionzones AT liweiwei spatialdistributioncharacteristicsofnbtaofmaficrocksinsubductionzones AT gecan spatialdistributioncharacteristicsofnbtaofmaficrocksinsubductionzones AT wangfangyue spatialdistributioncharacteristicsofnbtaofmaficrocksinsubductionzones AT sunhe spatialdistributioncharacteristicsofnbtaofmaficrocksinsubductionzones AT guhaiou spatialdistributioncharacteristicsofnbtaofmaficrocksinsubductionzones
_version_	1718371711905169408

The spatial distribution characteristics of Nb–Ta of mafic rocks in subduction zones

Ejemplares similares