Geochemical Characteristics and Ore-Controlling Factors of Hutouya Polymetallic Deposit, Qinghai Province
详细信息
- 责任者：Zhang Aikui (Third Institute of Qinghai Geological Mineral Prospecting ; Xining 810029 ; China) ; Liu Guanglian
- 刊名：Mineral Deposits
- 出版年：2013
- 卷期：32(1)
- 关键词：多金属矿 ; polymetallic ores ; 矿床地球化学 ; mineral deposit geochemistry ; 青海 ; Qinghai Province
- 页码：p.94-108
- 图表：illus., 6 tables, 23 refs.
- 分类号：1001
- issnNo：ISSN0258-7106
- isbnNo：CN11-1965/P
摘要
Mineralization of the Hutouya deposit is very complicated,and the unclear mineralization and ore-controlling factors constitute the bottleneck which restricts the breakthrough of the ore-prospecting work.Detailed studies of characteristics of the ore deposit and geochemistry,geochronology and geochemistry of intrusive rocks were conducted by the authors with some achievements obtained.Zircon LA-MC-ICP-MS U-Pb isotopic age of monzogranite in No.Ⅵ ore belt is(217.5±1.1) Ma(MSWD=1.4).Monzogranite of Ⅵ mineral belt and Ⅱ mineral belt have such features of post-collision rocks as high content of K2O and Na2O,higher K2O than Na2O,higher differentiation,gently right-oblique shape in chondrite-normalized REE patterns,enrichment of LILE,moderate enrichment of HFSE and depletion of Ti and Ba.Mineralization is controlled by such factors as magma sources of intrusive rocks,evolution mode of intrusive rocks,strata,and structure.The monzogranite intrusions of Ⅵ mineral belt whose material was partly contributed by the mantle had features of strong fractional crystallization and relatively strong ore-forming capability.They mainly formed skarn-type Cu-Pb-Zn polymetallic deposits.Ⅱ mineral belt Monzogranite which originated only from crustal sources had inferior mineralization capacity and they were mainly related to mineralization of such skarn-type ore bodies as tin,molybdenum and iron.
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