Copper Deposit, Yunnan Yimen Fengshan Characteristics Of Fluid Inclusions Study

Yimen Fengshan Copper deposit is located in Kunyang rift mine belt which is in southwest of Yangtze platform, Yunnan Province.Resources are exhausted gradually, mineralization theory and mineral prospecting technology are required.The dissertation based on the Superseding Resources Explorration for the State Crisis Mine-"Summary of Metallogenic regularity of Stratabound Polymetallic deposits in the southwest of China(No.20089943)." we obtained some conclusions, Through extensive outdoors observeviewing,large scale catalog, tectonic measurements, systematic sampling, identify of rock and mine, geochemistry analysis, facieology of fluid inclusion observeviewing, thermometry,R-man, calculation of physical chemistry,etc.1,Through structural interpretation and regular conclusion,proposed "ore-typediaper diapir+NE direction structures"is the main prospecting orientation.Also we proposed the Lvzhi-River fault provides dynamics rather than mineral ore provenance and conductor.2,Through mineral assemblage and generate sequence research, divided the Structural reworking-magmatic hydrothermal copper mineralization (Ⅰ) into two stages, early and later stages,describe the fluid inclusions particularly through facieology, generalized some regular patterns.Also,we study the physical chemistry setting in the Structural reworking-magmatic hydrothermal copper mineralization (Ⅰ) though thermometry,R-man, thermodynamics calculation.3,Through thermometry, thermodynamics calculation or measurement,study the fluid inclusions quantitatively in mineralized hydrothermal veins of diair and orebody in surrounding rock, obtain the parameters including temperature, salinity, density, pressure, depth, composition of gas,fo2,Eh and pH, reflex the physical chemistry conditions in the course of fluid migration and deposition.4,Generally,we proposed the mineralized fluid mechanism in the course of fluid migration and deposition:themetal mineral migrate as hydrogen- sulfur complex compound as HS-,in the course of migration from diaper to structural fracture in surrounding rock,there are some physical chemistry transitions:①the descending of temperature, salinity, pressure,etc;②the commixture of other water resource;③oxidization,poor alkalinity, the ascension of oxygen-fugacity;④reaction between fluid and surrounding rock.5,Lastfinally we make some comparisons in fluid inclusions with some typical deposition-Structural reworked mineral deposits in china,and producing formations in middle-Kunyang group, demonstrate that this deposit is typical deposition-Structural alteration mineral deposits,also we concluse the fluid developed tendency from Yinmin period to Lvzhi-River period.