稀有气体同位素地球化学应用前景

稀有气体有4个源区，包括大气、地下水、地壳和地幔；其中地幔稀有气体又可分为上地幔和下地幔2个源区。不同源区的稀有气体在同位素组成上截然不同，因而可以利用稀有气体同位素进行有关地质和地球化学过程的示踪。稀有气体同位素组成不仅对查明成矿流体的性质和来源及矿床成因具有重要作用，而且还可以为正确理解大规模成矿作用的地球动力学背景和全面弄清大型一超大型矿集区的时空分布规律提供重要线索。

Application Prospects of the Noble Gas Isotope on Geochemistry

The rare gases can be derived from four source regions, including atmosphere, groundwater, lithosphere and earth mantle. The source region of the rare gas from the mantle is divided into the upper mantle and lower mantle source regions. The rare gases from the different source regions are entirely different in the isotopic composition so that the noble gas isotope can be used as indicators of some geological and geochemical processes. The composition of the noble gas isotopes not only have a vital role in discovering the property and source of ore-forming fluids and the genesis of ore deposits, but also can provide with some important clues about the geodynamic setting of a large-scale metallogenesis and the space-time distribution pattern of large-sized or very-large-scale ore deposits.