Study On Copper And Gold Minealization Relationship Of Bolong Deposit In Gaize,Tibet

Bolong copper-gold deposit is another large deposit located in Duolong ore gathering area.Previous studies on Bolong deposit mainly focus on field exploration,physical and chemical conditions,metallogenic chronology and element geochemistry,without specific analysis of mineralization body morphology and copper-gold mineralization relationship.With the idea of classification mineralization,the basic analysis data of drilling holes are deeply excavated.Based on the patent software system of mineralization characteristics of the tutor team,and the mineralization relationship between copper and gold in Bolong deposit is analyzed from different aspects.Figure out How is the orebody? The main results are as follows:(1)The copper grade is between 0.01% to 11.9%,the range is 11.89%,the average is 0.21%,the standard deviation is 0.30%,and the dispersion coefficient is1.41,indicating that copper mineralization is relatively uneven.Its content is divided into A,B,C three levels according to 0.05%～0.2%,0.2%～1%,≥1%,and W below level A.The copper element data is concentrated in level B,accounting for 58.79% of the total mineralization.The copper mineralization combination is mainly single A,single B,AB,BC,ABC type,and there is no single C combination type.The main types of structural mineralization are AB,CB,AC,BCB,ABC,and CBA.In the structure of copper,there are cross-level types such as BCB,WB,BW,BAW,etc.The mineralization is relatively complex,and the multi-phase hydrothermal superimposition effect is strong.The plane and profile mineralization in the middle section are mostly irregular,with hydrothermal mineralization properties.(2)The gold element grade is between 0.001g/t and 12g/t,the range is 11.999g/t,the average is 0.14g/t,the standard deviation is 0.18g/t,the dispersion coefficient is1.29,indicating gold mineralization Extremely uneven.Its content is divided into A,B,C three levels according to 0.1～1g/t,1～3g/t,≥3g/t,and W below level A.The gold element data is concentrated in the A level,accounting for 99.65% of the total mineralization.The mineralization combination of gold elements is in order of single A,AB,AC,ABC type.There are many structural types,mainly AW,BA,WA,AWA,WAW,ABA and other types.There are cross-level mineralization types,which obviously can only be the result of multi-class and multi-phase superposition of hydrothermal fluids.On the plane and section of the middle section,the mesh and sieve mineralization forms are relatively developed,and the hydrothermal mineralization properties are obvious.(3)The copper-gold type structure of the Bolong deposit is divided into three types: copper-gold equal,copper high and gold low,copper low and high gold,among which there is no CC type in the copper-gold same level,that is,copper-gold high-level mineralization Not at the same location,reflecting the inconsistency of multiple overlapping areas of hydrothermal activity.The copper-high-gold-low and copper-low-gold-high types accounted for 83.48% of the sample structure,much higher than the 16.52% of the copper-gold equivalent,reflecting the poor synchronization of copper-gold mineralization in the Bolong deposit.(4)The copper-gold segment structure of the Bolong deposit is divided into six types of relationships: single copper,single gold,inclusion,enveloping,and overlapping.It contains the highest proportion of the types of sections,and the rest are single copper,single gold,clad in,staggered,and same position.Obviously,there are very few mineralized sections with the same position of copper and gold.The plane distribution positions of single copper and single gold are very different.Obviously,copper and gold mineralization are poorly correlated.(5)From the perspective of the spatial distribution of copper and gold mineralization in the Bolong deposit,the middle section of the copper has good planar continuity,and the section is barrel-shaped and irregular.The middle section of the gold is only level A or above(A+ level)more continuous,and the profile is more developed in grid-like and sieve-like mineralization.The high-level mineralization types of copper and gold have poor correlation in the planar distribution.That is to say,the correlation between copper and gold is poor in terms of internal structure and spatial relationship.Copper and gold are obviously not a "family".The author believes that copper and gold mineralization is not formed by a hydrothermal system.In summary,the Bolong ore deposit is a hydrothermal deposit.The mineralization of copper and gold comes from different ore-forming hydrothermal systems superimposed in the same position and ex-situ multiple times.