A novel purification method for high precision measurement of Ni isotopes by double spike MC-ICP-MS

Wu, Ganguo; Zhu, Jiang; Wang, Xiang-Li; Han, Guilin; Tan, Dalong; Wang, Shui‐Jiong

doi:10.1039/c9ja00077a

Cited by 32 publications

(39 citation statements)

References 52 publications

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“…The vertical line inside the box represents the median value, while that outside the box represents the maximum and minimum value. The red and blue dash lines represent the upper continental crust (UCC) and modern seawater compositions, respectively 28 , 66 . b Boxplot showing the Ni isotopic fractionations in various geochemical processes 29 , 38 .…”

Section: Discussionmentioning

confidence: 99%

“…The optimized ratio of 62 Ni spike : 58 Ni sample is~1.3. Five purification procedures were used to suppress the interference from Fe, Zn, Mg, Ca, and other elements (see SI) 66 . The yield of Ni for the total procedure is >90%.…”

Section: Methodsmentioning

confidence: 99%

“…with Fe/Ni, Zn/Ni, Ca/Ni, and Mg/Ni <0.01 was analyzed on a Nu plasma II High Resolution Multi-Collector ICP-MS at State Key Laboratory of Environmental Geochemistry in Institute of Geochemistry, Chinese Academy of Sciences, Guiyang. Faraday cups L5, L4, L2, AX, H2, H4, H6, H7, and H8 are used to collect 57 Fe, 58 (Fe, Ni), 59 Co, 60 Ni, 61 Ni, 62 Ni, 63 Cu, 64 (Ni, Zn), 65 Cu, and 66 Zn, respectively. The isobaric interference from 58 Fe and 64 Zn were corrected by 57 Fe and 66 Zn, respectively.…”

Section: Methodsmentioning

confidence: 99%

“…Faraday cups L5, L4, L2, AX, H2, H4, H6, H7, and H8 are used to collect 57 Fe, 58 (Fe, Ni), 59 Co, 60 Ni, 61 Ni, 62 Ni, 63 Cu, 64 (Ni, Zn), 65 Cu, and 66 Zn, respectively. The isobaric interference from 58 Fe and 64 Zn were corrected by 57 Fe and 66 Zn, respectively. 58 Ni, 60 Ni, 61 Ni, and 62 Ni are used for analysis here.…”

Section: Methodsmentioning

confidence: 99%

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Active methanogenesis during the melting of Marinoan snowball Earth

et al. 2021

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Geological evidence indicates that the deglaciation of Marinoan snowball Earth ice age (~635 Myr ago) was associated with intense continental weathering, recovery of primary productivity, transient marine euxinia, and potentially extensive CH4 emission. It is proposed that the deglacial CH4 emissions may have provided positive feedbacks for ice melting and global warming. However, the origin of CH4 remains unclear. Here we report Ni isotopes (δ60Ni) and Yttrium-rare earth element (YREE) compositions of syndepositional pyrites from the upper most Nantuo Formation (equivalent deposits of the Marinoan glaciation), South China. The Nantuo pyrite displays anti-correlations between Ni concentration and δ60Ni, and between Ni concentration and Sm/Yb ratio, suggesting mixing between Ni in seawater and Ni from methanogens. Our study indicates active methanogenesis during the termination of Marinoan snowball Earth. This suggests that methanogenesis was fueled by methyl sulfides produced in sulfidic seawater during the deglacial recovery of marine primary productivity.

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Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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Active methanogenesis during the melting of Marinoan snowball Earth

et al. 2021

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“…For in situ (U‐Th)/He dating, a new apatite RM (MK‐1 apatite) has been introduced by Wu et al . (2019a). A set of synthetic andesitic glasses for microanalytical purposes (ARM‐1, ARM‐2, ARM‐3) with reference and information values for fifty‐six elements was presented by Wu et al .…”

Section: Journal No Of Papersmentioning

confidence: 99%