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Laser Ablation Inductively Coupled Plasma mass Spectrometer (LA-ICPMS)Back to Mineral Characterisation Studies

  • The Laser ablation technique is dominantly used for in situ analysis of geological samples to study trace elements concentrations and zonations in minerals and rocks.
  • The technique involves removal of mass from solid samples by application of laser energy.
  • The ablated / removed mass of sample is then analysed by a suitable analytical technique.
  • At LAICPMS, Laboratory GSI, Faridabad a CETAC Nd:YAG 213nm Laser Ablation (LA) System coupled with Agilent 7700 Inductively Coupled Plasma – Quadrupole Mass Spectrometer [ICPMS (QP)] is used to analyse the composition of the sample with sensitive detectors that measure concentrations in the parts per billion
 LA-ICPMS

Standard Operating Procedure

Capabilities:

  • The technique is extremely useful for trace element and REE analysis of minerals up to concentration in part per billion (ppb).
  • To determine the bulk composition of rocks by pellet preparations and fusion beads
  • Elemental mapping on a sub-grain scale
  • Direct analysis from petrographic thin sections and polished sections etc.

Application in earth science

  • Precise trace element analysis can help in studying petrogenetic processes
  • Mineral-melt partition coefficients studies to obtain direct information on importance of melt compositions
  • Identification of mantle reservoirs, magma mixing and crustal assimilation
  • Application to Geothermobarometry.
  • Environmental and paleoclimate studies –analysis of debris and tephra from sediment cores etc.
  • Trace elements can be interpreted as proxies for rainfall, vegetation, and growth rate to resolve seasonal information in Speleothems.
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    Existing Locations:

    • NCEGR,Faridabad

      Additional Director General
      National Mission Head-IV
      Central Headquater

      Geological Survey of India
      15 A & B Kyd Street
      Kolkata-700016
      Fax- 033-22861716
      Email- hodm4@gsi.gov.in
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