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Geodynamic Model of Metallogeny of Haigou Large Gold Deposit, Jilin Province

Author: ChangYan
Tutor: LiXuJun
School: Jilin University
Course: Mineral resources, economic and technical
Keywords: Trench gold deposits Fluid inclusions Metallogenic chronology The metallogenic thermal power source Metallogenic Dynamics mode
CLC: P618.51
Type: Master's thesis
Year: 2009
Downloads: 177
Quote: 6
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Abstract


Trench gold mine located in the Yanbian Autonomous Prefecture , located on the tectonic position Xingmeng orogenic belt bordering the eastern margin of the North China Taiwan tectonic zone , the region NE-trending faults and NW of the two rivers to clear teahouse - gold and silver do not fracture intersections control the formation of the gold deposits . Other gold deposits in the folder furrow Gold Belt and adjacent areas are significantly different , this gold deposits is not only a larger scale , and it is not produced in the ancient basement rocks of the edge of the land station , but produced in the neighboring land Xingmeng orogenic band. To study the the mineralization dynamics model , can provide important information for the formation of the North China Taiwan orogenic gold deposits in eastern and Distribution Law , deep trench gold deposits and peripheral prospecting work provides a theoretical guidance . Combined with previous data , regional geology Trench gold deposits , geological characteristics and fluid inclusions thermometry combined deposit diorite porphyry zircon CL image analysis and LA-ICP-MS U-Pb age of testing , the paper made ??the following three points of understanding : ( 1 ) trench gold deposit mainly mesothermal mineralization , can be divided into four stages of mineralization : milky vein quartz stage , gold - smoke gray vein quartz - stage of pyrite , gold - polymetallic sulfide stage calcite stage ; ② mineralization temperature at 150 ° C to 350 ° C the mineralizing fluid CO2-rich CO2-H2O-CH4 -type ; ore-forming fluids mainly by the lower crust activation produce , for of magma water and atmospheric water mixed hydrothermal ore-forming materials mainly come from the lower crust , comes from a small amount of color Luohe group ; ③ The mineralization age of 170 Ma to 140 Ma , the mineralization comes mainly from thermal power sources Jiapigou - trench ductile shearing . The the trench gold deposit is a typical intracontinental orogenic - type gold deposits .

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CLC: > Astronomy,Earth Sciences > Geology > Of ore deposits > Deposit classification > Precious metals > Gold
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