STUDY ON THE FLUID INCLUSION PHYSICOCHEMICAL CONDITIONS OF BOLONG PORPHYRY COPPER-GOLD DEPOSIT IN TIBET

HUO Yan; LI Dan

Volume 22 Issue 2

Jun. 2016

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Article Navigation > Journal of Geomechanics > 2016 > 22(2): 338-345

Wu Zhenhan, 1998. ON THE EFFECT OF ALTERNATING STRESS RESULTING FROM THE TIDAL FORCE AND ITS BEARING ON GEODYNAMICS. Journal of Geomechanics, 4 (3): 20-27.

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HUO Yan, LI Dan, 2016. STUDY ON THE FLUID INCLUSION PHYSICOCHEMICAL CONDITIONS OF BOLONG PORPHYRY COPPER-GOLD DEPOSIT IN TIBET. Journal of Geomechanics, 22 (2): 338-345.

Wu Zhenhan, 1998. ON THE EFFECT OF ALTERNATING STRESS RESULTING FROM THE TIDAL FORCE AND ITS BEARING ON GEODYNAMICS. Journal of Geomechanics, 4 (3): 20-27.

Citation:

HUO Yan, LI Dan, 2016. STUDY ON THE FLUID INCLUSION PHYSICOCHEMICAL CONDITIONS OF BOLONG PORPHYRY COPPER-GOLD DEPOSIT IN TIBET. Journal of Geomechanics, 22 (2): 338-345.

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STUDY ON THE FLUID INCLUSION PHYSICOCHEMICAL CONDITIONS OF BOLONG PORPHYRY COPPER-GOLD DEPOSIT IN TIBET

HUO Yan^1
,,
LI Dan²

1.
College of earth sciences, Chengdu University of Technology, Chengdu 610059, Sichuan
2.
Rock and Mineral Testing Center of Henan Province, Zhengzhou 450012, Henan

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Abstract

Abstract

Using Linkam THNSG600 dating and calculating by experience formulas, this paper discusses the fluid inclusion characteristics of Bolong porthyry copper-gold deposit in Tibet, which is beneficial to the migration of the main ore-forming element Cu, and the metallogenic process includes four periods: magma-advanced stage, magnetite-molybdenite period, chalcopyrite-pyrite period and anhydrite-pyrite period. It shows that the type of fluid inclusion is mainly the three-phases inclusion including NaCl and metal sulfide daughter minerals. The ore-forming fluid forms in high temperature (232~549 ℃) and low pressure (1.40×10⁵~234.41×10⁵ Pa), with high salinity (28.65~52.16wt% NaCl) and middle-high density (1.0683~1.1598 g/cm³). Along with the metallogenic process, the fluid fugacity and activity gradually reduce in each stages, while the values of pH and Eh increase. The element Cu mainly exits in the form of Cu(H₂S)(HS)₂^-, which shows that Cu is easier to mineralization in high tempreture and acidic fluids.
- fluid inclusion,
- physicochemistry conditions,
- porphyry copper-gold deposit,
- Bolong

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References

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STUDY ON THE FLUID INCLUSION PHYSICOCHEMICAL CONDITIONS OF BOLONG PORPHYRY COPPER-GOLD DEPOSIT IN TIBET

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