Low-temperature Raman spectroscopic analyses of fluid inclusions from granitoid-related mineral deposits and comparisons with decrepitate analyses.

• Main Author: Walker, Ryan Thomas.
• Format: Master Thesis
• Language: English
• Published: University of Windsor 1998
• Subjects: Geology; Canada; Leddy; Antarc*
• Online Access: https://scholar.uwindsor.ca/etd/2655; https://scholar.uwindsor.ca/context/etd/article/3654/viewcontent/mq52490_uwindsor.pdf

Large single crystals do allow for easy Raman spectroscopic identification, but do not give an indication of the bulk chemistry of the inclusion. Comparison of relative peak intensities in low-temperature Raman spectra of synthetic mixtures in the NaCl-CaCl2-H2O system allows for semi-quantitative estimates of the relative abundance of NaCl and CaCl2 in some of the fluid inclusions studied. It was possible to obtain such spectra from very small, low salinity inclusions, although the peaks present in the spectra are of very low intensity. Ice, hydrohalite and antarcticite were detected by low-temperature LRS in inclusions from the South Platte fluorite-REE pegmatites, Colorado, however, only ice and hydrohalite were detected in inclusions from other environments, including the Mt. Pleasant Sn-W-Mo deposit, New Brunswick. These data confirm that the phase behaviour of fluid inclusions in these deposits can be modeled using the H2O-NaCl and H2O-NaCl-CaCl2 systems. EDS/WDS analyses of fluid inclusion decrepitates from the deposits studied, generally agree with the Raman results but indicate the presence of small concentrations of K in some cases. (Abstract shortened by UMI.)Dept. of Earth Sciences. Paper copy at Leddy Library: Theses & Major Papers - Basement, West Bldg. / Call Number: Thesis1998 .W34. Source: Masters Abstracts International, Volume: 39-02, page: 0463. Adviser: Iain Samson. Thesis (M.Sc.)--University of Windsor (Canada), 1998.