Font Size: a A A

Metallogenic Characteristics And Prospecting Potential Of Typical Molybdenum Polymetallic Ore Deposit In Luanchuan

Posted on:2017-04-16Degree:MasterType:Thesis
Country:ChinaCandidate:Z L WuFull Text:PDF
GTID:2180330485992340Subject:Mineral prospecting and exploration
Abstract/Summary:PDF Full Text Request
East Qinling molybdenum metallogenic belt is one of the most important molybdenum ore belt in the world. Luanchuan mineralization area in the center position of the eastern qinling molybdenum ore belt, Nannihu-Sandaozhuang deposits and Dongyuku deposit is located in the north and south ore concentration area,is the typical super large and large molybdenum-tungsten deposit. With the progress of deep prospecting, ore concentration area prospecting focus gradually southward migration. Therefore this article through the contrast research of the metallogenic geological characteristics, relevant mineralogy characteristics of rock mass, the geochemical characteristics of rock mass, the ore deposit geochemical characteristics and metallogenic fluid evolution, summarizing and analyzing the similarity and difference of this two typical deposits, analysing the metallogenic difference reasons, further understanding the mineralization of ore concentration, and hope to provide some reference for prospecting of mineralization zone, understanding and achievements are as follows:Similarity: 1, The deposit in this area are all of porphyry-skarn type molybdenum-tungsten deposit, ore-forming are closely related to the small porphyry of Yanshan period, the ore body occurrence of similar parts, ore types, fabric and composition is basically the same, the potassium and silicide in wall rock alteration is the most closely relationship with mineralization. The tectonic before metallogenic affected the distribution of ore body, the interlaminar fracture and fracture zone is a good place for ore fluid precipitation. 2, The metallogenic rock are all with high silicon, rich alkali and stronger evolution differentiation, diagenetic material derived from the crust-mantle mixed source, Characteristics of post-orogenic I type granites with high temperature and high oxygen fugacity. 3, The gas composition in early stage of ore-forming fluid for CO2 may be associated with deep fluid, metallogenic material mainly comes from the deep. The initial magma fluid has the characteristics of rich F poor Cl may be one of the reasons for ore concentration don’t have scale porphyry copper mine.Differences: 1, Nannihu-Sandaozhuang deposits are controlled by tectonic joint degree stronger, the average grade of ore is much bigger than Dongyuku deposit.2, The potassium level of north rock mass is higher, according to the emergence of phlogopite and the Ti characteristics in biotite think it happened metasomatism after the diagenetic metamorphism by the mantle fluid. Trace elements and rare earth elements in Yuku concealed rock bodies show that the degree of crystallinity is lower than that of other rocks.3, There was a large scale mineralization in quartz- sulfide stage in Nannihu-sandaozhuang deposit relative to the Dongyuku deposit.The mineralization of the Research area is a complex process, the mineralization is related to a series of formation and differentiation of magma, deep rich alkali fluid metasomatism on the basis of Mesozoic delamination of lower crust to the thinning of the lithosphere and the bottom of mantle-derived magma invasion. Yuku Concealed rock mass in southern ore concentration area has good metallogenic potential in it’s interior and inner contact zone.
Keywords/Search Tags:Nannih-Sandaozhuang, Dongyuku, Porphyry-skarn type molybdenum-tungsten deposit, The comparative study of metallogenic characteristics
PDF Full Text Request
Related items