Microanalysis of Pb isotope ratios of low-Pb glass samples by femtosecond laser ablation-multiple ion counter-ICP-mass spectrometry (fsLA-MIC-ICP-MS)

Chang, Qing; Kimura, Jun–Ichi; Miyazaki, Takashi; Sasaki, Satoshi; Kanazawa, Nobuyuki

doi:10.2343/geochemj.2.0307

Cited by 6 publications

(12 citation statements)

References 29 publications

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“…Finally, Pb isotope ratios were determined using the same 200 nm femtosecond laser coupled with a multiple collector-ICP-MS (Thermo Fisher Scientific; Neptune) 57,58 . The ablation pit was set to a diameter of 30 μm and a depth of 20 μm.…”

Section: Methodsmentioning

confidence: 99%

Tiny droplets of ocean island basalts unveil Earth’s deep chlorine cycle

et al. 2019

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Fully characterising the exchange of volatile elements between the Earth’s interior and surface layers has been a longstanding challenge. Volatiles scavenged from seawater by hydrothermally altered oceanic crust have been transferred to the upper mantle during subduction of the oceanic crust, but whether these volatiles are carried deeper into the lower mantle is poorly understood. Here we present evidence of the deep-mantle Cl cycle recorded in melt inclusions in olivine crystals in ocean island basalts sourced from the lower mantle. We show that Cl-rich melt inclusions are associated with radiogenic Pb isotopes, indicating ancient subducted oceanic crust in basalt sources, together with lithophile elements characteristic of melts from a carbonated source. These signatures collectively indicate that seawater-altered and carbonated oceanic crust conveyed surface Cl downward to the lower mantle, forming a Cl-rich reservoir that accounts for 13–26% or an even greater proportion of the total Cl in the mantle.

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Section: Methodsmentioning

confidence: 99%

Tiny droplets of ocean island basalts unveil Earth’s deep chlorine cycle

et al. 2019

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“…The SRM612 standard was analyzed for every five unknown samples, and five points were usually analyzed for all of the tephras and standard glasses. The analytical results for the BCR‐2G, BHVO‐2G, and JR‐1 standard glasses correlated well with their reference values [ Chang et al ., ; Jochum et al ., ; Kimura et al ., ] (supporting information Table S3).…”

Section: Samples and Methodsmentioning

confidence: 99%

Origins of felsic magmas in Japanese subduction zone: Geochemical characterizations of tephra from caldera‐forming eruptions <5 Ma

Kimura

Nagahashi

Satoguchi

et al. 2015

Geochem Geophys Geosyst

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Dacitic to rhyolitic glass shards from 80 widespread tephras erupted during the past 5 Mys from calderas in Kyushu, and SW, central, and NE Japan were analyzed. Laser ablation inductively coupled plasma mass spectrometry was used to determine 10 major and 33 trace elements and A few tephras from SW Japan were identified as adakite and alkali rhyolite and were regarded to have originated from slab melt and mantle melt, respectively. The Pb isotope ratios of the tephras are comparable to those of the intermediate lavas in the source areas but are different from the basalts in these areas. The crustal assimilants for the intermediate lavas were largely from crustal melts and are represented by the rhyolitic tephras. A large heat source is required for forming large volumes of felsic crustal melts and is usually supplied by the mantle via basalt. Hydrous arc basalt formed by cold slab subduction is voluminous, and its heat transfer with high water content may have melted crustal rocks leading to effective felsic magma production. Coincidence of basalt and felsic magma activities shown by this study suggests caldera-forming eruptions are ultimately the effect of a mantle-driven cause.

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“…8,9 The use of multiple ion counters (MICs) extended the lower limit of detection with lower repeatability and intermediate precision because of the poorer linearity of MICs results in comparison to MFC results, in particular, with the early-stage miniature MIC devices. [10][11][12][13] Developments in MFC-ICPMS using a high efficiency ion sampling interface improved the sensitivity by about an order of magnitude. 10,12,14 Also, the sampling efficiency of LA has been approximately doubled by the use of UV femtosecond laser ablation (UVFsLA) 15 in place of UVNsLA.…”

Section: Introductionmentioning

confidence: 99%

“…[10][11][12][13] Developments in MFC-ICPMS using a high efficiency ion sampling interface improved the sensitivity by about an order of magnitude. 10,12,14 Also, the sampling efficiency of LA has been approximately doubled by the use of UV femtosecond laser ablation (UVFsLA) 15 in place of UVNsLA. The present day sensitivity of the complete UVFsLA-MFC-ICPMS system has been reported to be >1% atom transmission from the LA crater to the Faraday collector, which rivals the ion transmission of typical thermal ionisation mass spectrometry (TIMS).…”

Section: Introductionmentioning

confidence: 99%

High-precision in situ analysis of Pb isotopes in glasses using 10¹³ Ω resistor high gain amplifiers with ultraviolet femtosecond laser ablation multiple Faraday collector inductively coupled plasma mass spectrometry

Kimura

Chang

Kanazawa³

et al. 2016

J. Anal. At. Spectrom.

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Microanalysis of Pb isotope ratios of low-Pb glass samples by femtosecond laser ablation-multiple ion counter-ICP-mass spectrometry (fsLA-MIC-ICP-MS)

Cited by 6 publications

References 29 publications

Tiny droplets of ocean island basalts unveil Earth’s deep chlorine cycle

Tiny droplets of ocean island basalts unveil Earth’s deep chlorine cycle

Origins of felsic magmas in Japanese subduction zone: Geochemical characterizations of tephra from caldera‐forming eruptions <5 Ma

High-precision in situ analysis of Pb isotopes in glasses using 10¹³ Ω resistor high gain amplifiers with ultraviolet femtosecond laser ablation multiple Faraday collector inductively coupled plasma mass spectrometry

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Microanalysis of Pb isotope ratios of low-Pb glass samples by femtosecond laser ablation-multiple ion counter-ICP-mass spectrometry (fsLA-MIC-ICP-MS)

Cited by 6 publications

References 29 publications

Tiny droplets of ocean island basalts unveil Earth’s deep chlorine cycle

Tiny droplets of ocean island basalts unveil Earth’s deep chlorine cycle

Origins of felsic magmas in Japanese subduction zone: Geochemical characterizations of tephra from caldera‐forming eruptions <5 Ma

High-precision in situ analysis of Pb isotopes in glasses using 1013 Ω resistor high gain amplifiers with ultraviolet femtosecond laser ablation multiple Faraday collector inductively coupled plasma mass spectrometry

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About

High-precision in situ analysis of Pb isotopes in glasses using 10¹³ Ω resistor high gain amplifiers with ultraviolet femtosecond laser ablation multiple Faraday collector inductively coupled plasma mass spectrometry