Font Size: a A A

Characteristics And Genesis Of The Qiongkuer Iron Deposit In Western Tianshan, Xinjiang Province

Posted on:2016-06-25Degree:MasterType:Thesis
Country:ChinaCandidate:B HeFull Text:PDF
GTID:2180330461494846Subject:Mineralogy, petrology, ore deposits
Abstract/Summary:PDF Full Text Request
The Qiongkuer iron deposit is an iron deposit newly discovered in the Awulale metallogenic belt, western Tianshan, Xinjiang Province. A detailed study has been carried out on the geological and geochemical characteristics of this deposit based on the widely collected previous data, with a focus on its metallogenic condition and process.Field investigation and whole-rock geochemical analyses prove that the major host wall rock is the Carboniferous volcanic rocks of the Dahalajunshan Formation. These rocks belong to calc-alkaline and high-K calc-alkaline series, and could be formed in the island-arc tectonic environment in Early Carboniferous when the South Tianshan Ocean subducted to the Yili Plate. On the basis of ore veins cutting relation and mineral assemblage, metallogenic process for the Qiongkuer iron deposit can be divided into ore magma and hydrothermal periods. The ore magma period can be further divided into oxide and sulfide stages, and the hydrothermal period into potassic alteration, magnetite-chlorite, quartz-sulfide and carbonatization stages. Microscopic observation and microprobe analyses indicate the occurrence of obvious difference in texture, structure, and mineral between the ores formed in the ore magma period and those in the hydrothermal period. The ores formed in the ore magma period have dense massive structure and vesicular structure with magmatic magnetite. In contrast, the ores formed in the hydrothermal period are characterized by vein structure and disseminated structure, with hydrothermal magnetite.The obtained ore deposit geological and geochemical data are consistent with an origin of ore magma-hydrothermal superimposition and compound for the Qiongkuer iron deposit, and support its formation through magma liquation followed by volcanic hydrothermal activity.
Keywords/Search Tags:Ore deposit geology, ore deposit geochemistry, metallogenic process, compound iron of ore magma-hydrothermal superimposition, Awulale in Xinjiang Province
PDF Full Text Request
Related items