Geochemistry of olivine-hosted melt inclusions in the Baekdusan (Changbaishan) basalts: Implications for recycling of oceanic crustal materials into the mantle source

Choi, Hyun-Ok; Choi, Sung Hi; Schiano, Pierre; Cho, Moonsup; Cluzel, Nicolas; Devidal, Jean‐Luc; Ha, Kyoochul

doi:10.1016/j.lithos.2017.04.006

Cited by 25 publications

(10 citation statements)

References 159 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…S9). This study and earlier works 19,22 show the involvement of appreciable amounts of a pyroxenite component of basaltic oceanic crust in origin and H 2 O in the source mantle. It is unlikely that the basaltic oceanic crust (eclogite) and the sediments were the source of the buoyancy, because eclogite and continental crustal materials are denser than the ambient peridotite in the depth range of the deep upper mantle and MTZ 36,37 .…”

Section: Discussionsupporting

confidence: 82%

“…1), which is among the most clearly imaged examples of a mantle plume originating from the MTZ. Geochemical studies of the basalts also show involvement of the stagnant slab and metasomatised peridotite materials from the MTZ in their mantle source 18,19 , yet water content in the mantle source has not been accurately determined. In this study, the water content of the basalt was determined using thermodynamic analyses and mineral melt inclusions for selected young basaltic samples.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Buoyant hydrous mantle plume from the mantle transition zone

Kuritani

Xia

Kimura

et al. 2019

Sci Rep

View full text Add to dashboard Cite

Magmatism at some intraplate volcanoes and large igneous provinces (LIPs) in continental areas may originate from hydrous mantle upwelling (i.e. a plume) from the mantle transition zone (MTZ) at 410–660 km depths in the Earth’s deep interior. However, the ultimate origin of the magmatism, i.e. why mantle plumes could have been generated at the MTZ, remains unclear. Here, we study the buoyancy of a plume by investigating basalts from the Changbaishan volcano, beneath which a mantle plume from the hydrous MTZ is observed via seismology. Based on carefully determined water contents of the basalts, the potential temperature of the source mantle is estimated to be 1310–1400 °C, which is within the range of the normal upper mantle temperature. This observation suggests that the mantle plume did not have a significant excess heat, and that the plume upwelled because of buoyancy resulting from water supplied from the Pacific slab in the MTZ. Such a hydrous mantle plume can account for the formation of extremely hydrous LIP magmatism. The water was originally sourced from a stagnant slab and stored in the MTZ, and then upwelled irrespective of the presence or absence of a deep thermal plume.

show abstract

Section: Discussionsupporting

confidence: 82%

Section: Introductionmentioning

confidence: 99%

Buoyant hydrous mantle plume from the mantle transition zone

Kuritani

Xia

Kimura

et al. 2019

Sci Rep

View full text Add to dashboard Cite

show abstract

“…All trace element compositions found in the glass are similar to those found in the bulk host rocks (Figure ). As expected, the glass features relatively high SiO 2 and low MgO content levels (Figure ), which may reflect the mean magmatic composition of the final stages of magma evolution (Choi et al, ).…”

Section: Resultssupporting

confidence: 65%

“…As expected, the glass features relatively high SiO 2 and low MgO content levels ( Figure 5), which may reflect the mean magmatic composition of the final stages of magma evolution (Choi et al, 2017).…”

Section: Glass Geochemistrysupporting

confidence: 69%

“…Sediments carried into the subduction channel melted due to increases in temperature and pressure and may have produced organic hydrocarbons (C n H m ; Song, Su, Niu, Lai, & Zhang, ; Figure ). Fluids and melts released from the subducted sediments (possibly also from the altered oceanic crust) modified the overlying mantle wedge (e.g., Choi et al, ; Guo et al, ; Guo et al, ). Different proportions of the subducted sedimentary component were injected into melted mafic magmas, producing the different melt compositions recorded in the SMIs.…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Geochemistry of silicate melt inclusions in middle and southern Okinawa Trough rocks: Implications for petrogenesis and variable subducted sediment component injection

Zeng

Yang

et al. 2018

Geological Journal

View full text Add to dashboard Cite

Silicate melt inclusions (SMIs) in olivine, clinopyroxene, and orthopyroxene in basalt and trachyandesite of the middle Okinawa Trough (MOT) and in basaltic andesites of the southern Okinawa Trough (SOT) were investigated in detail to understand the evolution of magma and geochemical characteristics of the basaltic magma source. Both the SMIs and host bulk rocks are more heavily enriched with Pb and large ion lithophile elements than with high field strength elements and rare earth elements. The major element compositions of SMIs in the MOT trachyandesite show a scattered variation trend of medium‐K to shoshonitic series and suggest that a K‐rich magma source may exist in the Okinawa Trough. Two groups with distinct element distribution patterns observed in SMIs of the MOT trachyandesite may represent magmas with different evolutionary histories. Compared with fractional crystallization and partial melting processes, magma mixing may serve as a reasonable process for the production of trachyandesite in the MOT. Fractional crystallization has played an important role in basaltic magma evolution in the MOT and SOT. Simulations conducted using MELTS show that the fractional crystallization evolution trends observed correspond well to the presence of a magma chamber at 300 MPa with an H2O content level of 0.2 wt% in the MOT and to the presence of a magma chamber at 300 MPa with an H2O content level of 0.4 wt% in the SOT. Ratios of incompatible trace elements (e.g., Th/Ce, Th/Sm, Ba/Th, and Th/Nb); positive Pb anomalies; negative Nb, Ta, and Ti anomalies; and the existence of organic hydrocarbons (CnHm) in the SMIs can be attributed to the involvement of subducted sediment from the subducting slab. Modelling results suggest that more primitive magma represented by SMIs from the MOT has formed through the melting of less than 6% of a metasomatized depleted mantle with contributions of 1.2% sediment melt and 0.8% sediment fluid. In contrast, more primitive magma from the SOT formed through the melting of 4–10% of the depleted mantle with contributions of 3% sediment melt and 1% sediment fluid. The different features of the SMIs together with different tectonic settings of the MOT and SOT have formed in response to the westward subduction of the Philippine Sea Plate.

show abstract

Petrogenesis of basalt from the middle Okinawa Trough: New insights from olivine‐hosted melt inclusions

Zeng

Wang

et al. 2018

Geological Journal

View full text Add to dashboard Cite

Silicate melt inclusions (SMIs) in basalt from the middle Okinawa Trough are investigated in detail to understand the source geochemical characteristics and petrogenesis of the basalt. The middle Okinawa Trough basalts contain abundant SMIs within olivine phenocrysts. The major element compositions of the SMIs are analysed using an electron microprobe. After correcting for olivine postentrapment crystallization, the major element compositions of the SMIs are more variable in terms of SiO2 (49.7–54.8 wt%) and MgO (5.1–7.2 wt%) than those of the host basalt (SiO2, 52.4 wt%; MgO, 5.7 wt%), which could indicate the existence of more primitive melts than erupted bulk rock. The major element compositions of the SMIs indicate that the SMI‐recorded melt evolution process was mainly dominated by the fractional crystallization of olivine. According to laser ablation inductively coupled mass spectrometer analyses, the trace element compositions of the SMIs are similar to those of the host bulk rock and feature obvious enrichment in Pb and large‐ion lithophile elements relative to high field strength elements, rare earth elements, and highly negative Nb and Ta anomalies. The low Ce/Pb ratios, high Pb contents, and trace element distribution patterns in the SMIs are related to contributions from subducted sedimentary components in the magma source. Based on the electron microprobe analyses, the chemical composition of the olivine suggests that the lithology of the basalt source may be pyroxenite. The basalts may have been generated by the partial melting of pyroxenite during interactions between mantle‐wedge peridotite and Si‐rich melts that were released from the subducted slab.

show abstract

Geochemistry of olivine-hosted melt inclusions in the Baekdusan (Changbaishan) basalts: Implications for recycling of oceanic crustal materials into the mantle source

Cited by 25 publications

References 159 publications

Buoyant hydrous mantle plume from the mantle transition zone

Buoyant hydrous mantle plume from the mantle transition zone

Geochemistry of silicate melt inclusions in middle and southern Okinawa Trough rocks: Implications for petrogenesis and variable subducted sediment component injection

Petrogenesis of basalt from the middle Okinawa Trough: New insights from olivine‐hosted melt inclusions

Contact Info

Product

Resources

About