Measurement of the Isotopic Composition of Molybdenum in Geological Samples by MC‐ICP‐MS using a Novel Chromatographic Extraction Technique

Li, Jie; Liang, Xirong; Zhong, Ling; Wang, Xuan‐Ce; Zhongyuan, Ren; Sun, Shi‐Gang; Zhang, Zhaofeng; Xu, Ji‐Feng

doi:10.1111/j.1751-908x.2013.00279.x

Cited by 106 publications

(81 citation statements)

References 36 publications

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“…The average Mo mass fraction of BHVO-2 determined by isotope dilution MC-ICP-MS in this study is identical within uncertainty to the values determined by Yang et al (2015) and Wang et al (2015), and also to our previously isotope dilution MC-ICP-MS values (Li et al 2014). Data for WGB-1 are slightly lower than the reference value (about 0.67 versus 1.2 lg g -1 , respectively), whereas data for JA-2 are higher than the reference value (about 0.99 versus 0.6 lg g -1 , respectively).…”

Section: Mo Mass Fractions and Isotopic Compositions Of Geological Resupporting

confidence: 70%

“…For details of the procedures for routine sample dissolution, column chemistry and instrumental analysis of Mo isotopes, see Li et al (2014). ).…”

Section: Methodsmentioning

confidence: 99%

“…The d 98/95 Mo reproducibility was determined by the spiked NIST SRM 3134 reference solution analyses, which provided a precise and accurate representation of instrument behaviour during Mo by multiplying by 3/2. f Three of the twenty analyses are from our previous study (Li et al 2014). g Mean of the above results obtained for the three seawater reference materials.…”

Section: Procedures Validationmentioning

confidence: 99%

“…Three drops of concentrated HNO 3 and H 2 O 2 were added to the evaporated Mo to decompose any organic residue. Following this, 1 ml of 3% v/v HNO 3 was added to the Mo residue, after which the solution was ready for Mo isotopic ratio measurement by MC-ICP-MS. Because molybdenite (MoS 2 ) has high Mo mass fractions and no other Li et al (2014) 3.90 -0.05 0.11 Burkhardt et al (2014) 4.55 -0.06 0.03 Wang et al (2015) 3.30 Siebert et al (2015) 3.70 0.00 0.07 Yang et al (2015) 3 …”

Section: Chromatographic Separationmentioning

confidence: 99%

“…Separation and purification of Mo were achieved with an in-house BPHA extraction chromatographic resin (Li et al 2014). Approximately 0.5 ml of BPHA resin (obtained by impregnating 5 g Amberchrom CG-71 resin with 40 ml of 3% BPHA solution in ethanol) was packed in a Poly-Prep column (8 mm 9 40 mm; Bio-Rad Laboratories, Inc., Berkeley, CA, USA).…”

Section: Chromatographic Separationmentioning

confidence: 99%

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Molybdenum Mass Fractions and Isotopic Compositions of International Geological Reference Materials

Zhao

Zhang

et al. 2015

Geostandard Geoanalytic Res

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The double-spike method with multi-collector inductively coupled plasma-mass spectrometry was used to measure the Mo mass fractions and isotopic compositions of a set of geological reference materials including the mineral molybdenite, seawater, coral, as well as igneous and sedimentary rocks. The long-term reproducibility of the Mo isotopic measurements, based on two-year analyses of NIST SRM 3134 reference solutions and seawater samples, was ≤ 0.07‰ (two standard deviations, 2s, n = 167) for d Molybdenum (Mo) is one of the most abundant transition metals in the oceans and is important for a range of biological and geochemical processes (Manheim and Landergren 1974, Colodner et al. 1995, Morford and Emerson 1999. It has seven stable isotopes with relative abundances ranging from 9% to 25%, covering a mass range of about 8% (Anbar 2004). Molybdenum isotopes are increasingly being used in Earth sciences. Of particular interest is the highly redox-sensitive behaviour of Mo, which is primarily used to investigate the oxygenation of Earth's ocean and atmosphere (Barling et al.

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Section: Mo Mass Fractions and Isotopic Compositions Of Geological Resupporting

confidence: 70%

“…For details of the procedures for routine sample dissolution, column chemistry and instrumental analysis of Mo isotopes, see Li et al (2014). ).…”

Section: Methodsmentioning

confidence: 99%

Section: Procedures Validationmentioning

confidence: 99%

Section: Chromatographic Separationmentioning

confidence: 99%

Section: Chromatographic Separationmentioning

confidence: 99%

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Molybdenum Mass Fractions and Isotopic Compositions of International Geological Reference Materials

Zhao

Zhang

et al. 2015

Geostandard Geoanalytic Res

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The Molybdenum Isotope System as a Tracer of Slab Input in Subduction Zones: An Example From Martinique, Lesser Antilles Arc

Gaschnig

Reinhard

Planavsky

et al. 2017

Geochem Geophys Geosyst

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Molybdenum isotopes are fractionated by Earth‐surface processes and may provide a tracer for the recycling of crustal material into the mantle. Here, we examined the Mo isotope composition of arc lavas from Martinique in the Lesser Antilles arc, along with Cretaceous and Cenozoic Deep Sea Drilling Project sediments representing potential sedimentary inputs into the subduction zone. Mo stable isotope composition (defined as δ98Mo in ‰ deviation from the NIST 3134 standard) in lavas older than ∼7 million years (Ma) exhibits a narrow range similar to and slightly higher than MORB, whereas those younger than ∼7 Ma show a much greater range and extend to unusually low δ98Mo values. Sediments from DSDP Leg 78A, Site 543 have uniformly low δ98Mo values whereas Leg 14, Site 144 contains both sediments with isotopically light Mo and Mo‐enriched black shales with isotopically heavy Mo. When coupled with published radiogenic isotope data, Mo isotope systematics of the lavas can be explained through binary mixing between a MORB‐like end‐member and different sedimentary compositions identified in the DSDP cores. The lavas older than ∼7 Ma were influenced by incorporation of isotopically heavy black shales into the mantle wedge. The younger lavas are the product of mixing isotopically light sedimentary material into the mantle wedge. The change in Mo isotope composition of the lavas at ∼7 Ma is interpreted to reflect the removal of the Cretaceous black shale component due to the arrival of younger ocean crust where the age‐equivalent Cretaceous sediments were deposited in shallower oxic waters. Isotopic fractionation of Mo during its removal from the slab is not required to explain the observed systematics in this system.

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Tracing subducted oceanic slabs in the mantle by using molybdenum isotopes: A case study of intraplate basalts from Northeast China

Zheng,

Gao,

Fan

et al. 2024

Geological Journal

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Determining subduction‐related processes is crucial for understanding lithological heterogeneity, as substantial quantities of slabs are recycled into the mantle. Molybdenum isotopes are valuable for distinguishing sources materials due to the significant isotope differences between the crust and the mantle. In this study, we systematically investigate Mo isotopes in a suite of well‐characterized continental basalts from Keluo and Halaha‐Chaoer, located in Northeast China. The δ98Mo values of Keluo range from −0.41 to −0.23‰, with an average of −0.34‰, while Halaha‐Chaoer samples ranged from −0.18 to −0.12‰, with an average of −0.15‰. The δ98Mo values of Keluo basalts are lighter than the mean value of fresh oceanic basalts (−0.21‰), whereas those of Halaha‐Chaoer basalts are similar to oceanic basalts. Combined with other geochemical indications (LOI, Ce/Pb, La/Yb and so on), the Mo isotopic variations cannot be attributed to chemical weathering, continental crust contamination or magmatic processes. Instead, the δ98Mo variations in this study are explained by the incorporation of different oceanic crustal materials into the magma sources. Correlations of δ98Mo with Ba/Th, Th/U, 143Nd/144Nd indicated that both sediment and altered oceanic crust have significantly influenced these variations. This study demonstrates the potential of Mo isotopes to distinguish different types of recycled oceanic crust materials.

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Measurement of the Isotopic Composition of Molybdenum in Geological Samples by MC‐ICP‐MS using a Novel Chromatographic Extraction Technique

Cited by 106 publications

References 36 publications

Molybdenum Mass Fractions and Isotopic Compositions of International Geological Reference Materials

Molybdenum Mass Fractions and Isotopic Compositions of International Geological Reference Materials

The Molybdenum Isotope System as a Tracer of Slab Input in Subduction Zones: An Example From Martinique, Lesser Antilles Arc

Tracing subducted oceanic slabs in the mantle by using molybdenum isotopes: A case study of intraplate basalts from Northeast China

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