Method for simultaneously analyzing water content, oxygen isotope and hydrogen isotope in hydrous mineral based on large ion probe

Abstract

The invention discloses a method for simultaneously analyzing water content, oxygen isotope and hydrogen isotope in hydrous minerals based on a large ion probe. According to the method, based on the high spatial resolution of a large ion probe and the characteristic that multiple receiving cups are used as detectors, the water content, the oxygen isotope and the hydrogen isotope are simultaneouslytested by using multiple receivers under the ultrahigh resolution (10% MRP is greater than 10000), and the collection of all ions is completed in a one-time collection process. Two apatite samples (Kovdor, Durango) and three glass samples (LBS7H, LBS5H and LBS6H) are taken as analysis object examples, simultaneous analysis of the water content, the oxygen isotope and the hydrogen isotope based onthe large ion probe is realized, and on the premise of ensuring the analysis precision, the analysis machine time is obviously shortened, and analysis efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of mineral composition analysis, and relates to a method for simultaneously analyzing water content, oxygen isotopes and hydrogen isotopes in hydrous minerals based on a large ion probe. Background technique [0002] Water is the basis of human existence; even if there is only a trace of water, many physical and chemical properties of minerals and rocks (such as wave velocity, rheological characteristics, electrical conductivity, optical properties, melting temperature, ion diffusion behavior, etc.) The occurrence and development of various deep geological processes (such as partial melting, fluid replacement, detachment, delamination, underplating, etc.) will also be significantly affected. It has even been suggested that plate tectonics would not occur without water. Therefore, studying the content, distribution and evolution of water in different layers of the deep earth has always been one of the major ...

AI Technical Summary

Problems solved by technology

For example, use CAMECA NanoSIMS to test water content and hydrogen isotope, and then use CAMECA IMS 1280 or CAMECA IMS 1280-HR to test oxygen isotope. This combination not only requires two types of instruments, but the analysis accuracy of NanoSIMS needs to be improved; or use CAMECA IMS1280 Or CAMECA IMS 1280-HR measures water content and oxygen isotope at the same time, and then measures hydrogen isotope separately. This combination of methods can be satisfied in terms of accuracy, but the same sample needs to be analyzed twice, and the loss of the sample will be more, and It is possible to decouple data due to two measurements; or use CAMECA IMS 1280 or CAMECA IMS1280-HR to analyze water content, oxygen isotopes and hydrogen isotopes in a single-receive peak-hopping mode. high loss of sample

However, the method of simultaneously testing water content, oxygen isotope and hydrogen isotope by using CAMECA IMS 1280 or CAMECA IMS 1280-HR multi-receiving peak jumping has not been reported, and its application has not yet been realized.

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