%0 Journal Article
%T Cryogenic Raman Spectroscopic Studies on Common Ore-forming Fluid Systems
%A Dan Yang
%A Weishi Chen
%A Xin Xiong
%J Minerals | An Open Access Journal from MDPI
%D 2019
%R https://doi.org/10.3390/min9060363
%X The composition and properties of ore-forming fluids are key to understanding the mechanisms of mineralization in ore deposits. These characteristics can be understood by studying fluid inclusions. Hydrates in fluid inclusions containing NaCl每H 2O and MgCl 2每H 2O were studied using cryogenic Raman spectroscopy. The intensity ratio of peaks at 3401, 3464, 3514, and 3090 cm ˋ1 shows a positive correlation with the concentration of hydrates in the inclusions, as does the ratio of the total integrated area of the MgCl 2 hydrate peak (3514 cm ˋ1) to the 3090 cm ˋ1 peak with the concentration of MgCl 2 (correlation coefficient >0.90). These correlations are important in the quantitative analysis of MgCl 2 in synthetic and natural NaCl每MgCl 2每CaCl 2每H 2O-bearing fluid inclusions. Semi-quantitative analysis of NaCl每MgCl 2每H 2O solutions indicates that peaks at 3437 and 3537 cm ˋ1 reflect the presence of NaCl in the solution. Further, a peak at 3514 cm ˋ1 is indicative of the presence of MgCl 2. The relative intensities of these peaks may be related to the relative abundances of NaCl and MgCl 2. A quantitative attempt was made on NaCl每MgCl 2每CaCl 2每H 2O system, but it was found that quantifying NaCl, MgCl 2 and CaCl 2 separately in NaCl每MgCl 2每CaCl 2每H 2O system by the secondary freezing method is difficult. View Full-Tex
%U https://www.mdpi.com/2075-163X/9/6/363