Composition of Fluid Inclusions from the Hellyer and Mt. Chalmers VHMS Deposits, Australia: Implications for Source of Ore-Forming Fluids
- Organization:
- The Australasian Institute of Mining and Metallurgy
- Pages:
- 6
- File Size:
- 755 KB
- Publication Date:
- Jan 1, 1995
Abstract
The Hellyer and Mt. Chalmers deposits are mound-style volcanic-hosted massive sulphide (VHMS) deposits in Australia. Textural, petrographic and microthermometric investigations of fluid inclusions in the Hellyer stringer system indicate that Type I, primary, liquid-vapour inclusions are 10-15 pm in size, and yield homogenisation temperatures of 170-220¦C in early 2A veins, 165-322¦C in main-stage 2B veins and 190-256¦C in late-stage 2C veins. These data suggest a waxing and waning thermal history. However, the average salinity remained between 8-11 NaCl equiv. wt % in all Stage 2 veins. At Mt. Chalmers, Type I inclusions up to 20 ¦m are found in quartz from the mineralised zone, and these inclusions yielded homogenisation temperatures of 160-268¦C and salinities of 5-8 NaCl equiv. wt %. Laser Raman spectroscopic (LRS) analysis indicates the presence of CO2 (
Citation
APA: (1995) Composition of Fluid Inclusions from the Hellyer and Mt. Chalmers VHMS Deposits, Australia: Implications for Source of Ore-Forming Fluids
MLA: Composition of Fluid Inclusions from the Hellyer and Mt. Chalmers VHMS Deposits, Australia: Implications for Source of Ore-Forming Fluids . The Australasian Institute of Mining and Metallurgy, 1995.