Can the change of frequency and size of fluid inclusions in porphyry-epithermal system indicate the hydrothermal center and peripheral part? Does denser and larger fluid inclusions in quartz or calcite imply vicinity of the center of the hydrothermal system? Thank you all in advance.
The fluid inclusions of the deposit can be divided into four types: 1) gas-rich inclusions; 2) liquid-rich inclusion; 3) salt-saturated H2O inclusion; and 4) single-phase or multiphase CO2-rich inclusion. Homogenization temperatures of the fluid inclusions range from 100 to 520°C, mainly in the range 120–400°C. The daughter crystal-bearing multiphase inclusions present in quartz porphyries (including Nos. 13 and 4 dikes) have been observed. In ore veins, some daughter crystal-bearing multiphase inclusions have been observed, too. On the basis of the results of fluid inclusion research, the authors suggest that the ore-forming fluid must have a close genetic relation to magmatic hydrothermal solution. The ore-forming fluid was dominantly originated from the depth and the mixing of magmatic solution with meteoric water was enhanced during ascending of the fluid, accompanying immiscibility and boiling of fluid. There may be a concealed igneous body at the depth of the Yinshan deposit, which furnishes the scientific basis for metallogenic prognosis at the depth of the Yinshan deposit.
Dear Sir
I think the links below will benefit you in your search
http://www.geologos.com.pl/pdf/Geologos-23-3-Radmard.pdf
https://www.geochem.geos.vt.edu/fluids/recentprojects/
Article The conjunction of factors that lead to formation of giant g...
Article Noble Gas Data from Goldfield and Tonopah Epithermal Au-Ag D...
https://file.scirp.org/pdf/OJG_2017081414570687.pdf
Best Regards
Hello Le,,
Within the single hydrothermal vein, the crystallization normally starts from rim into core with respect to crustification process. so it seems logic to find Th total are higher in FL from peripheral part than center, however it could be reversed if you have more than hydrothermal pulses or phase. So the rule couldn't be generalized.
You can have a look on such article
https://www.sciencedirect.com/science/article/pii/S1464343X18301055
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