Imaging the impurity distribution in glacier ice cores with LA-ICP-MS

Bohleber, Pascal; Roman, Marco; Šala, Martin; Barbante, Carlo

doi:10.1039/d0ja00170h

Cited by 20 publications

(29 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…localization of impurities within the ice crystal matrix (Figure 1). Further details of the ice core impurity imaging method have already been described elsewhere (Bohleber et al, 2020).…”

Section: Methodsmentioning

confidence: 99%

Two-dimensional impurity imaging in deep Antarctic ice cores: Snapshots of three climatic periods and implications for high-resolution signal interpretation

Bohleber

Roman²,

Fiorini³

et al. 2020

Preprint

Self Cite

View full text Add to dashboard Cite

Abstract. Due to its micron-scale resolution and micro-destructiveness, laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) is especially suited for exploring closely spaced layers in the oldest and highly thinned sections of polar ice cores. Recent adaptions of the LA-ICP-MS technique have achieved fast washout times as the basis for introducing state-of-the-art 2D imaging to ice core analysis. This new method has great potential in its application for investigating the localization of impurities on the ice sample, crucial to avoid misinterpretation of ultra-fine resolution signals. Here first results are presented from applying LA-ICP-MS elemental imaging to selected glacial and interglacial samples of the Talos Dome and EPICA Dome C ice cores from central Antarctica. The localization of impurities with both marine and terrestrial sources is discussed, revealing generally a strong connection with the network of grain boundaries but also distinct differences among climatic periods. Scale-dependent image analysis shows that the spatial significance of a single line profile along the main core axis increases systematically as the imprint of grain boundaries weakens. With this, it is demonstrated how instrumental settings can be adapted specifically fit-for-purpose, i.e. either to employ LA-ICP-MS to study the impurity-microstructure interplay or to investigate highly thinned climate proxy signals in deep polar ice.

show abstract

“…localization of impurities within the ice crystal matrix (Figure 1). Further details of the ice core impurity imaging method have already been described elsewhere (Bohleber et al, 2020).…”

Section: Methodsmentioning

confidence: 99%

Two-dimensional impurity imaging in deep Antarctic ice cores: Snapshots of three climatic periods and implications for high-resolution signal interpretation

Bohleber

Roman²,

Fiorini³

et al. 2020

Preprint

Self Cite

View full text Add to dashboard Cite

show abstract

“…Deep ice is affected by the progressive re-crystallization of ice grains [36][37][38] . A consequence of re-crystallization is that impurities incompatible with the ice lattice accumulate at ice grain junctions 39,40 or within intra-grain µ-inclusions 37,41 . Atmospheric sulfates and sulfuric acid are strongly affected by remobilization in ice 39,42 .…”

Section: Englacial Chemical Weathering Of Mineral Dust In Deep Icementioning

confidence: 99%

Jarosite formation in deep Antarctic ice provides a window into acidic, water-limited weathering on Mars

et al. 2021

View full text Add to dashboard Cite

Many interpretations have been proposed to explain the presence of jarosite within Martian surficial sediments, including the possibility that it precipitated within paleo-ice deposits owing to englacial weathering of dust. However, until now a similar geochemical process was not observed on Earth nor in other planetary settings. We report a multi-analytical indication of jarosite formation within deep ice. Below 1000 m depth, jarosite crystals adhering on residual silica-rich particles have been identified in the Talos Dome ice core (East Antarctica) and interpreted as products of weathering involving aeolian dust and acidic atmospheric aerosols. The progressive increase of ice metamorphism and re-crystallization with depth, favours the relocation and concentration of dust and the formation of acidic brines in isolated environments, allowing chemical reactions and mineral neo-formation to occur. This is the first described englacial diagenetic mechanism occurring in deep Antarctic ice and supports the ice-weathering model for jarosite formation on Mars, highlighting the geologic importance of paleo ice-related processes on this planet. Additional implications concern the preservation of dust-related signals in deep ice cores with respect to paleoclimatic reconstructions and the englacial history of meteorites from Antarctic blue ice fields.

show abstract

“…29 For only a few examples it was reported that the washout time was as short as a few milliseconds. 19,23,30 Dwell time. Quadrupole ICP-MS acquires data for an allocated mass-to-charge ratio (m/z) for a specified time period, or dwell time, before moving to the next m/z.…”

Section: Washout Timementioning

confidence: 99%

“…It has been used for the determination of micro-and trace elements and the measurement of isotope ratios, as well as in microanalyses, in-depth profiling, and elemental imaging. 13 And imaging has been widely applied in many fields, including geology 14 , biology [15][16][17][18] , and the environmental 19 and material sciences. [20][21][22] However, most of the LA-ICP-MS imaging samples should be provided with a planar surface, and there were few reports on curved surface samples.…”

Section: Introductionmentioning

confidence: 99%

Elemental Imaging Of Alumina Ceramic Tube Using Laser Ablation- Inductively Coupled Plasma-Mass Spectrometry (LA-ICP-MS)

Wang¹

2021

At.Spectrosc.

View full text Add to dashboard Cite

Laser ablation-inductively coupled plasma-mass spectrometry (LA-ICP-MS) is an attractive analytical technique for the direct analysis of samples found in the geology, biology, and the environmental and material sciences. However, few reports have discussed the difficulty found in the analysis of curved surface samples by LA-ICP-MS where the main focus is on the curved surface. In this work, LA-ICP-MS was used to map the elemental images of curved surface samples by segmentation and recombination. In addition, the influence of parameters, such as laser spot size, laser fluence, repetition rate, scan speed, dwell time and washout time on lateral resolution were investigated. The developed method was applied to the imaging analysis of lanthanum in an alumina ceramic tube, and the results showed that lanthanum was not uniformly distributed in the tube.

show abstract

Imaging the impurity distribution in glacier ice cores with LA-ICP-MS

Abstract: The novel combination of ice core LA-ICP-MS with improved imaging techniques reveals impurity localization without artifacts.

Cited by 20 publications

References 38 publications

Two-dimensional impurity imaging in deep Antarctic ice cores: Snapshots of three climatic periods and implications for high-resolution signal interpretation

Two-dimensional impurity imaging in deep Antarctic ice cores: Snapshots of three climatic periods and implications for high-resolution signal interpretation

Jarosite formation in deep Antarctic ice provides a window into acidic, water-limited weathering on Mars

Elemental Imaging Of Alumina Ceramic Tube Using Laser Ablation- Inductively Coupled Plasma-Mass Spectrometry (LA-ICP-MS)

Contact Info

Product

Resources

About