An improved U–Pb age dating method for zircon and monazite using 200/266 nm femtosecond laser ablation and enhanced sensitivity multiple-Faraday collector inductively coupled plasma mass spectrometry

2015 ◽  
Vol 30 (2) ◽  
pp. 494-505 ◽  
Author(s):  
Jun-Ichi Kimura ◽  
Qing Chang ◽  
Keita Itano ◽  
Tsuyoshi Iizuka ◽  
Bogdan Stefanov Vaglarov ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Laser Ablation ◽  
Inductively Coupled Plasma ◽  
Femtosecond Laser Ablation ◽  
Age Dating ◽  
Inductively Coupled ◽  
Enhanced Sensitivity ◽  
Icp Ms ◽  
Plasma Mass Spectrometry ◽  
Dating Method

High precision U–Pb dating using multiple Faraday collectors has become available in LA-MC-ICP-MS.

scholarly journals Advanced in situ geochronological and trace element microanalysis by laser ablation techniques

2006 ◽  
Vol 10 ◽  
pp. 25-28 ◽  
Author(s):  
Dirk Frei ◽  
Julie A. Hollis ◽  
Axel Gerdes ◽  
Dan Harlov ◽  
Christine Karlsson ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Laser Ablation ◽  
Trace Element ◽  
Inductively Coupled Plasma ◽  
Age Dating ◽  
Inductively Coupled ◽  
Icp Ms ◽  
Wide Range ◽  
Plasma Mass Spectrometry

Laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) was developed in 1985 and the first commercial laser ablation systems were introduced in the mid 1990s. Since then, LA-ICP-MS has become an important analytical tool in the earth sciences. Initially, the main interest for geologists was in its ability to quantitatively determine the contents of a wide range of elements in many minerals at very low concentrations (a few ppm and below) with relatively high spatial resolution (spot diameters of typically 30–100 μm). The potential of LA-ICP-MS for rapid in situ U–Th–Pb geochronology was already realised in the early to mid 1990s. However, the full potential of LA-ICP-MS as the low-cost alternative to ion-microprobe techniques for highly precise and accurate in situ U–Th–Pb age dating was not realised until the relatively recent advances in laser technologies and the introduction of magnetic sectorfield ICP-MS (SF-ICPMS) instruments. In March 2005, the Geological Survey of Denmark and Greenland (GEUS) commissioned a new laser ablation magnetic sectorfield inductively coupled plasma mass spectrometry (LA-SF-ICP-MS) facility employing a ThermoFinnigan Element2 high resolution magnetic sectorfield ICP-MS and a Merchantek New Wave 213 nm UV laser ablation system. The new GEUS LA-SF-ICP-MS facility is widely used on Survey research projects in Denmark and Greenland, as well as in collaborative research and contract projects conducted with partners from academia and industry worldwide. Here, we present examples from some of the these ongoing studies that highlight the application of the new facility for advanced geochronological and trace element in situ microanalysis of geomaterials. The application of LASF-ICP-MS based in situ zircon geochronology to regional studies addressing the Archaean geology of southern West Greenland is presented by Hollis et al. (2006, this volume).

scholarly journals Direct U–Pb dating of carbonates from micron-scale femtosecond laser ablation inductively coupled plasma mass spectrometry images using robust regression

Geochronology ◽  
2021 ◽  
Vol 3 (1) ◽  
pp. 67-87
Author(s):  
Guilhem Hoareau ◽  
Fanny Claverie ◽  
Christophe Pecheyran ◽  
Christian Paroissin ◽  
Pierre-Alexandre Grignard ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Laser Ablation ◽  
Femtosecond Laser ◽  
Inductively Coupled Plasma ◽  
Goodness Of Fit ◽  
Robust Regression ◽  
Femtosecond Laser Ablation ◽  
Inductively Coupled ◽  
Icp Ms ◽  
Plasma Mass Spectrometry

Abstract. Uranium–lead (U–Pb) dating of carbonates by laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) spot analysis is an increasingly used method in the field of geosciences, as it brings very strong constraints over the geological history of basins, faults or reservoirs. Most ages currently published are based on the measurement of U and Pb ratios on spot ablations, using nanosecond lasers coupled to sector field or multi-collector ICP-MS. Here, we test a new strategy for the U–Pb dating of carbonates from 2D isotopic ratio maps, based on the use of a robust regression approach in the data reduction workflow. The isotopic maps, with a minimum area of 0.65 mm2 (∼ 1000 pixels of 13×25 µm resolution), are obtained using a 257 nm femtosecond laser ablation system at a high repetition rate (500 Hz) coupled to a high-resolution ICP-MS. The maps commonly show significant variations in isotope ratios at the pixel scale, allowing the plotting of pixel U–Pb ratios in concordia or isochron diagrams and the calculation of U–Pb ages. Due to the absence of individual ratio uncertainties, the ages are calculated using MM-robust linear regression rather than the more commonly used York-type regression. The goodness of fit to the data is assessed by the calculation of the residual standard error (RSE) of the regression and by the calculation of a mean square of weight deviates (MSWD) on discretised data. Several examples are provided that compare the ages calculated by robust regression with those obtained by other techniques (e.g. isotope dilution, LA-ICP-MS spot analyses and the pixel-pooling approach). For most samples, characterised by high U concentrations (> 1 ppm), robust regression allows for the calculation of ages and uncertainties similar to those obtained with the other approaches. However, for samples with lower U concentrations (< 0.5 ppm), the ages obtained are up to 10 % too young due to pixels with high U ∕ Pb acting as leverage points for the regression. We conclude that the U–Pb ages calculated by the regression method tested here, although statistically robust, should be critically analysed before validation, especially for samples with low U concentrations.

Evaluation of a custom single Peltier-cooled ablation cell for elemental imaging of biological samples in laser ablation-inductively coupled plasma-mass spectrometry (LA-ICP-MS)

2016 ◽  
Vol 31 (4) ◽  
pp. 1030-1033 ◽  
Author(s):  
J. S. Hamilton ◽  
E. L. Gorishek ◽  
P. M. Mach ◽  
D. Sturtevant ◽  
M. L. Ladage ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Laser Ablation ◽  
Biological Samples ◽  
Inductively Coupled Plasma ◽  
Peltier Element ◽  
Elemental Imaging ◽  
Inductively Coupled ◽  
Icp Ms ◽  
Plasma Mass Spectrometry ◽  
Biological Sampling

A new single Peltier element ablation cell is described and its applicability to biological sampling discussed to evaluate its performance.

Laser ablation inductively coupled plasma mass spectrometry for multi-elemental determination in dried blood spots

2017 ◽  
Vol 32 (8) ◽  
pp. 1500-1507 ◽  
Author(s):  
Jorge Moreda-Piñeiro ◽  
Alicia Cantarero-Roldán ◽  
Antonio Moreda-Piñeiro ◽  
José Ángel Cocho ◽  
Pilar Bermejo-Barrera
Keyword(s):  
Mass Spectrometry ◽  
Laser Ablation ◽  
Inductively Coupled Plasma ◽  
Dried Blood Spots ◽  
Element Determination ◽  
Inductively Coupled ◽  
Inductively Coupled Mass Spectrometry ◽  
Icp Ms ◽  
Elemental Determination ◽  
Plasma Mass Spectrometry

An approach by laser ablation (LA) coupled with inductively coupled mass spectrometry (ICP-MS) for multi-element determination in whole blood is described.

Micrometer-Resolved Binding of Lead to Iron in Urban River Sediments

2004 ◽  
Vol 57 (10) ◽  
pp. 921 ◽  
Author(s):  
Sebastien Rauch ◽  
Gregory M. Morrison
Keyword(s):  
Mass Spectrometry ◽  
Laser Ablation ◽  
Inductively Coupled Plasma ◽  
River Sediments ◽  
Element Analysis ◽  
Inductively Coupled ◽  
Icp Ms ◽  
Recent Developments ◽  
Plasma Mass Spectrometry ◽  
Multi Element Analysis

Recent developments in laser microprobes and the coupling of laser ablation (LA) to inductively coupled plasma mass spectrometry (ICP-MS) has opened up the possibility for detailed analysis of individual sediment grains and the elucidation of metal association with bulk elements and phases. Here, LA–ICP-MS is used for the micrometer-resolved, multi-element analysis of Pb and bulk elements such as Fe, Mg, Al, and Si. Normalized Pb signals show a clear association to Fe coatings at the surface of the particles.

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