A Hydrogen Isotope Analysis System in Fluid Inclusion Water

Abstract

The invention discloses a fluid inclusion water hydrogen isotope analysis system. The fluid inclusion water hydrogen isotope analysis system comprises a water sample collection instrument and a TC / EA-IRMS combination instrument; the water sample collection instrument comprises a vacuum communication pipeline, a sample cracking device and a water sample collection device; the water sample collection device comprises a quartz collection tube, and a capillary tube part is formed on the lower end of the quartz collection tube; the TC / EA-IRMS combination instrument comprises a high-temperature splitting / element analyzer (TC / EA) and an isotope ratio mass spectrometry (IRMS), and the high-temperature splitting / element analyzer comprises a high-temperature reaction tube and a gas chromatographic column; by adopting the capillary tube part and a solid feeding way, the relatively small sample amount is needed, and the sample amount of the fluid inclusion can be effectively reduced.

Description

technical field [0001] The invention relates to the technical field of stable isotope analysis, in particular to a hydrogen isotope analysis system in fluid inclusion water. Background technique [0002] Fluid inclusions refer to one or more fluid inclusions that are filled and sealed in tiny holes, fissures or intergranules of minerals by rock-forming ore-forming fluids (gas-liquid-containing fluids or silicate melts) during mineral crystallization growth. A phase state substance (liquid, gas or solid), which has been sealed in the main mineral since its formation and has a phase boundary with the main mineral. Since the determination of the isotope composition of fluid inclusions (sometimes referred to as inclusions or inclusions) can provide unique information for the study of diagenetic and mineralization theory, paleoclimate and paleotemperature reconstruction, gemstone mine exploration, gemstone identification, etc. It has been developed rapidly and widely used. [0...

AI Technical Summary

Problems solved by technology

For conventional hydrogen isotope analysis in inclusion water, in order to achieve satisfactory isotope ratio analysis results (such as the signal peak intensity of mass spectrometry samples), the amount of water required for testing is generally about 2-10uL when liquid samples are injected (that is, it is necessary to collect 2 ~10uL water sample), at this time, at least 3g of sample (for example, 3~10g) is required, which puts forward higher requirements for mineral separation. In the actual mineral separation, inclusion samples often cannot be selected from 3g samples, and the hydrogen produced in this way It is less, when entering the IRMS mass spectrometry detection, the measured isotope ratio is often inaccurate due to the low signal of the sample

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