Alteration and Mineralization Zoning of Hutouya Polymetallic Deposit in Qimantag Area, Qinghai Province
详细信息
- 责任者：Ma Shengchao (Zhengyuan Geological Exploration Institute of Shandong ; China Metallurgical and Geological Bureau ; Jinan 250101 ; China) ; Feng Chengyou
- 刊名：Mineral Deposits
- 出版年：2013
- 卷期：32(1)
- 关键词：多金属矿 ; polymetallic ores ; 围岩蚀变 ; wall-rock alteration ; 青海 ; Qinghai Province
- 页码：p.109-121
- 图表：illus., 4 tables, 17 refs.
- 分类号：1001
- issnNo：ISSN0258-7106
- isbnNo：CN11-1965/P
摘要
The Hutouya copper-lead-zinc polymetallic deposit is located in the Qimantag metallogenic subzone,which belongs to the west segment of East Kunlun.The mineralized zone lies in the contact alteration zone between the intrusive rock and the strata,the contact zone between two strata and the shatter zone within the strata.The deposit possesses inner and outer contact zones,from the intrusion to the strata,the dominant mineralization elements vary in order of W-Mo→Fe-Sn-Cu→Cu-(Pb-Zn)→Pb-Zn-Ag,and types of alteration also change from K-feldspathization,silicification,greisenization to epidotization and diopsidization.There also exist diopsidization,chloritization and carbonatization of the late stage.The analysis of major elements shows that CaO diffused from the strata to the silicate intrusion while SiO2 and Al2O3 also diffused to the carbonate rock.And the enrichment of FeO,MnO and MgO shows that there existed both diffusive metasomatism and infiltration metasomatism.An analysis of ore-forming elements also suggests that W and Mo mainly exist in the intrusion and Fe,Cu,Pb,Zn are concentrated in the skarn.It is inferred that zonation of mineralization and alteration was produced by difference in ore-bearing potential and degree of the development of the microcrack system in the skarn.
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