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Fengshan copper deposit in Yunnan Yimen characteristics of fluid inclusions

Author: TangGuo
Tutor: HanRunSheng
School: Kunming University of Science and Technology
Course: Structural Geology
Keywords: Structural control Fluid inclusions Fengshan Copper Deposit Yunnan Yimen
CLC: P618.41
Type: Master's thesis
Year: 2011
Downloads: 66
Quote: 1
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Abstract


Fengshan Copper Mine in Yunnan YIMEN platform beds in the southwestern margin of the Yangtze metallogenic belt KUNYANG rift, now faced with depletion of resources, need mineralization depth theory and prospecting techniques in order to achieve the sustainable development of copper resources. This article relies on mentors to assume the \observations, large-scale geological record, roadway, geological structure analysis, systematic sampling, rock and mineral identification, geochemical analysis, inclusion petrographic observations, temperature, Raman test, physical chemistry calculation, etc., to obtain the following understanding: 1, through structural analysis and summary of the law, proposed the \And made green juice break in Fengshan River metallogenic areas provide dynamic mechanism which itself does not have the nature of the ore. 2, according to the sequence of mineral assemblages and generation characteristics of the structure transformation - magmatic hydrothermal superimposition of (I) the fluid is divided into morning and evening two stages, from the perspective of two petrographic phase inclusions do a detailed description summarizes some of the Petrographic laws, and the use of temperature measurement, Raman, thermodynamic calculations and other technical comprehensive study of the structural transformation - magmatic hydrothermal superimposition of (I) the physical and chemical conditions. 3, using petrographic, physical and chemical measurements and calculations, etc., on 59 ore body piercing near hydrothermal veins within the ore body and rock ore mineralization associated with inclusions, quantitative study of fluid inclusions in temperature, salinity, density, pressure, depth, gas composition, oxygen fugacity, Eh, pH, etc., to obtain a precipitate forming fluids in the process of migration and the physical and chemical conditions change parameters. 4, the above study raises Fengshan Copper ore fluid migration and precipitation mechanisms: Metal ions HS-based form of hydrogen sulfide complexes migrate from the pierced body (or other structure) to the rock fissures migration process occurs ① temperature, pressure, salinity reduction; ② mixed with other water sources; ③ pH into alkaline, Eh converted to oxide, oxygen fugacity higher; ④ and carbonate rock reaction, so that a large number of unloading fluid mineral enrichment mineralization. 5, and in some typical deposition - transformation type deposits in the ore-bearing horizon Kunyang Group Characteristics of fluid inclusions do a comprehensive comparison, from the perspective of fluid inclusions, further confirmed the transformation of the deposit is a typical type deposits, summed up from Queensland Yang Qun → green juice because of China Jiang period of fluid evolution trends.

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CLC: > Astronomy,Earth Sciences > Geology > Of ore deposits > Deposit classification > Non-ferrous metals > Copper
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