Partial Melting of Subducted Sediments Produced Early Mesozoic Calc-alkaline Lamprophyres from Northern Guangxi Province, South China

Abstract There is growing agreement that subducted sediments recycled into the deep mantle could make a significant contribution to the generation of various mantle-derived rocks. However, solid evidence and examples to support this view are few, and whether or not the subducted sediments can act as...

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Autores principales:	Hui-Min Su, Shao-Yong Jiang, Dong-Yang Zhang, Xiang-Ke Wu
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/eeef581cd4ad4c4aaaf2b01d774bfc99
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spelling	oai:doaj.org-article:eeef581cd4ad4c4aaaf2b01d774bfc992021-12-02T15:05:20ZPartial Melting of Subducted Sediments Produced Early Mesozoic Calc-alkaline Lamprophyres from Northern Guangxi Province, South China10.1038/s41598-017-05228-w2045-2322https://doaj.org/article/eeef581cd4ad4c4aaaf2b01d774bfc992017-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-05228-whttps://doaj.org/toc/2045-2322Abstract There is growing agreement that subducted sediments recycled into the deep mantle could make a significant contribution to the generation of various mantle-derived rocks. However, solid evidence and examples to support this view are few, and whether or not the subducted sediments can act as the dominating material source for the magma is unclear. Here, we report a comprehensive geochemical study that demonstrates that the newly identified Early Mesozoic calc-alkaline lamprophyres in the northern Guangxi Province, southeastern Yangtze Block in South China were likely derived in large part from the partial melting of the subducted terrigenous sediments in the deep mantle. The investigated lamprophyres are SiO2-rich minettes, characterized by moderate TFeO and MgO and high Mg# (>70). The multi-element pattern shows a typical crustal-like signature, such as enrichments in large-ion lithophile elements (LILE) and light rare earth elements (LREE) with troughs in Nb-Ta, Ti and Eu and peaks in Th-U and Pb. These rocks also show sediment-like ratios of Nb/U, Nb/Th and Ce/Pb, together with extremely radiogenic 87Sr/86Sr (0.71499–0.71919), unradiogenic 143Nd/144Nd (0.51188–0.51195) and radiogenic 207Pb/204Pb (15.701–15.718) isotopic compositions.Hui-Min SuShao-Yong JiangDong-Yang ZhangXiang-Ke WuNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-9 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Hui-Min Su Shao-Yong Jiang Dong-Yang Zhang Xiang-Ke Wu Partial Melting of Subducted Sediments Produced Early Mesozoic Calc-alkaline Lamprophyres from Northern Guangxi Province, South China
description	Abstract There is growing agreement that subducted sediments recycled into the deep mantle could make a significant contribution to the generation of various mantle-derived rocks. However, solid evidence and examples to support this view are few, and whether or not the subducted sediments can act as the dominating material source for the magma is unclear. Here, we report a comprehensive geochemical study that demonstrates that the newly identified Early Mesozoic calc-alkaline lamprophyres in the northern Guangxi Province, southeastern Yangtze Block in South China were likely derived in large part from the partial melting of the subducted terrigenous sediments in the deep mantle. The investigated lamprophyres are SiO2-rich minettes, characterized by moderate TFeO and MgO and high Mg# (>70). The multi-element pattern shows a typical crustal-like signature, such as enrichments in large-ion lithophile elements (LILE) and light rare earth elements (LREE) with troughs in Nb-Ta, Ti and Eu and peaks in Th-U and Pb. These rocks also show sediment-like ratios of Nb/U, Nb/Th and Ce/Pb, together with extremely radiogenic 87Sr/86Sr (0.71499–0.71919), unradiogenic 143Nd/144Nd (0.51188–0.51195) and radiogenic 207Pb/204Pb (15.701–15.718) isotopic compositions.
format	article
author	Hui-Min Su Shao-Yong Jiang Dong-Yang Zhang Xiang-Ke Wu
author_facet	Hui-Min Su Shao-Yong Jiang Dong-Yang Zhang Xiang-Ke Wu
author_sort	Hui-Min Su
title	Partial Melting of Subducted Sediments Produced Early Mesozoic Calc-alkaline Lamprophyres from Northern Guangxi Province, South China
title_short	Partial Melting of Subducted Sediments Produced Early Mesozoic Calc-alkaline Lamprophyres from Northern Guangxi Province, South China
title_full	Partial Melting of Subducted Sediments Produced Early Mesozoic Calc-alkaline Lamprophyres from Northern Guangxi Province, South China
title_fullStr	Partial Melting of Subducted Sediments Produced Early Mesozoic Calc-alkaline Lamprophyres from Northern Guangxi Province, South China
title_full_unstemmed	Partial Melting of Subducted Sediments Produced Early Mesozoic Calc-alkaline Lamprophyres from Northern Guangxi Province, South China
title_sort	partial melting of subducted sediments produced early mesozoic calc-alkaline lamprophyres from northern guangxi province, south china
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/eeef581cd4ad4c4aaaf2b01d774bfc99
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Partial Melting of Subducted Sediments Produced Early Mesozoic Calc-alkaline Lamprophyres from Northern Guangxi Province, South China

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