Melting of dehydrated oceanic crust from the stagnant slab and of the hydrated mantle transition zone: Constraints from Cenozoic alkaline basalts in eastern China

Sakuyama, Tetsuya; Tian, Wei; Kimura, Jun–Ichi; Fukao, Yoshio; Hirahara, Yuka; Takahashi, Takehiro; Senda, Ryoko; Chang, Qing; Miyazaki, Takashi; Obayashi, Masayuki; Kawabata, Hiroshi; Tatsumi, Yoshiyuki

doi:10.1016/j.chemgeo.2013.09.012

Cited by 126 publications

(138 citation statements)

References 143 publications

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“…All the samples show prominent positive spikes for Ba, K, Pb and Sr in the primitive mantle normalized diagram ( Supplementary Fig. 5), a typical characteristic of hydrated mantle melts 6,20,27,28 .…”

Section: Hydration Of the Mtz By Stagnant Pacific Slab Central-eastmentioning

confidence: 97%

Continental flood basalts derived from the hydrous mantle transition zone

et al. 2015

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Section: Hydration Of the Mtz By Stagnant Pacific Slab Central-eastmentioning

confidence: 97%

Continental flood basalts derived from the hydrous mantle transition zone

et al. 2015

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“…However, the low-Si lavas were erupted much later, including some near present-day occurrences in Penglai and Qixia in Jiaodong Peninsula (8.7-0.3 Ma), and in Dashan of Wudi in western Shandong (<1 Ma; Fig. 1; Luo et al, 2009;Zeng et al, 2010;Sakuyama et al, 2013). Thus, contributions from garnet pyroxenitic and carbonated mantle sources appear to reflect different temporal stages of basalt generation in the eastern NCC.…”

Section: A Carbonated Peridotitic/garnet Pyroxenitic Source For the Lmentioning

confidence: 99%

“…Xenocrystic olivine is common in continental volcanic rocks, and is present in the Cenozoic basalts of the eastern NCC (e.g., Zeng et al, 2011;Sakuyama et al, 2013). Three populations of olivine are evident in the nephelinite from Dashan of Wudi, and can be recognized based on size, morphology and inclusions.…”

Section: Geological Setting and Samplingmentioning

confidence: 99%

“…Recycled oceanic crust, with or without sediments, is considered by many workers to be a probable endmember component in the mantle sources of OIBs (e.g., White and Hofmann, 1982;Hofmann, 1997;Chauvel et al, 2008), and these models have been used to explain the variable Sr-Nd-Hf-Pb isotope signatures in Cenozoic intracontinental basalts in eastern China (e.g., Xu et al, 2012a;Sakuyama et al, 2013;Li et al, 2014;Xu, 2014). However, an actual physical model for this mixing of source components has not yet been constrained.…”

Section: A Two-component Mantle Sourcementioning

confidence: 99%

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Olivine and melt inclusion chemical constraints on the source of intracontinental basalts from the eastern North China Craton: Discrimination of contributions from the subducted Pacific slab

Ryan

et al. 2016

Geochimica et Cosmochimica Acta

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“…Paleo-Pacific slab lying in the mantle transition zone (410660 km) beneath the region could be the best source of fluids and hydrous melts (Niu, 2005;Kuritani et al, 2011;Sakuyama et al, 2013), i.e., the low-F melt (metasomatic agent) to metasomatize the deep portions of the cratonic lithosphere and LVZ. This process can explain the petrogenesis of the Jining 23.521.9 Ma basalts in particular, also the petrogenesis of the Cenzoic basalts from eastern China in general.…”

Section: Accepted M Manuscriptmentioning

confidence: 99%

Lithosphere thinning beneath west North China Craton: Evidence from geochemical and Sr–Nd–Hf isotope compositions of Jining basalts

Guo

Niu

et al. 2014

Lithos

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This study shows lithosphere evolution history in the west North China Craton (NCC) from the early Cretaceous to Quaternary by studying the major element, trace element and Sr-Nd-Hf isotope compositions in Jining basalts of 119.6108.6 Ma, 23.521.9 Ma and 1.30.11 Ma.The early Cretaceous basalts (119.6108.6 Ma) display enriched characteristics with high contents of incompatible elements, high 87 Sr/ 86 Sr i , low ε Nd (t) and low ε Hf (t). These basalts resulted from partial melting of ancient metasomatized lithospheric mantle, and we consider the 119.6108.6 Ma magmatism as indicating lithosphere thinning in the west NCC. Although the Pacific slab seen seismically in the mantle transition zone beneath eastern China is no older than 60 Ma, there exists convincing evidence for the presence of the Paleo-Pacific slab in the transition-zone in the Mesozoic. Thus we propose that the water released from the transition-zone slab hydrated A C C E P T E D M A N U S C R I P T ACCEPTED MANUSCRIPTthe overlying lithosphere and further converted the base of the lithosphere into asthenosphere. This is the most likely mechanism responsible for the lithosphere thinning in the west NCC and the petrogenesis of the Jining 119.6108.6 Ma basalts. Sr i , high ε Nd (t) and high ε Hf (t). Upwelling and decompression melting of the eastward flowing asthenosphere from beneath western plateaus to beneath eastern hilly plains in the Cenozoic is the most plausible mechanism for the petrogenesis of Jining Cenozoic basalts (both of 23.521.9 Ma and 1.30.11 Ma), but the Jining 1.30.11 Ma basalts must have been produced beneath even thinner lithosphere.Taken together geophysical studies and our petrological and geochemical studies of all these three episodes of the Jining basalts, wepropose that the lithosphere in the west NCC has been thinning since the early Cretaceous and the thinning continues to the present.

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Melting of dehydrated oceanic crust from the stagnant slab and of the hydrated mantle transition zone: Constraints from Cenozoic alkaline basalts in eastern China

Cited by 126 publications

References 143 publications

Continental flood basalts derived from the hydrous mantle transition zone

Continental flood basalts derived from the hydrous mantle transition zone

Olivine and melt inclusion chemical constraints on the source of intracontinental basalts from the eastern North China Craton: Discrimination of contributions from the subducted Pacific slab

Lithosphere thinning beneath west North China Craton: Evidence from geochemical and Sr–Nd–Hf isotope compositions of Jining basalts

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