Lithogeochemical Characteristics of the Alunite Metasomatic Alterated Rock of the Zijinshan Gold-Copper Deposit
详细信息
- 责任者：Wang Cuizhi (Zijin Mining College ; Fuzhou University ; Fuzhou 350108 ; China)
- 刊名：Advances in Earth Science
- 出版年：2013
- 卷期：28(8)
- 关键词：铜矿 ; copper ores ; 金矿 ; gold ores ; 福建 ; Fujian Province
- 页码：p.897-912
- 图表：8 illus., 4 tables, 26 refs.
- 分类号：1001
- issnNo：ISSN1001-8166
- isbnNo：CN62-1091/P
摘要
On the basis of geological survey and petrographic(ore microscopy) and through the comparison and analysis of geochemical characteristics of the metasomatic alterated rocks of the Zijinshan gold-copper deposit,we have further understanding on the high sulfidation epithermal hydrothermal metallogenic system of the Zijinshan gold-copper deposit.Compared with other kinds of metasomatic alterated rocks,geochemical characteristics of alunite metasomatic alterated rock are mainly reflected in: ①Al2O3 and K2O in the main elements increase significantly,and SiO2 reduces significantly,and the other rock-forming elements also have a reduced trend;②The analysis of the metallogenic elements shows that there is a close correlation between copper,sulfur and fluorine.The metallogenic element has a weak positive correlation with Au and Ag,and has poor correlation with Pb,Zn,Sn,etc.;③Trace elements show the contents of large ion lithophile elements are higher in the fluid,which is significantly rich in Rb,Ba,Th,U and Pb significantly and poor in P,Ti;④Rare earth elements generally have high light rare earths,low heavy rare earths and a slight negative Eu anomaly or without obvious negative Eu anomaly.Geochemical characteristics of alunite metasomatic alterated rock show that the high sulfidation epithermal hydrothermal ore-forming solution of the Zijinshan gold-copper deposit is a kind of fluids rich in multiple ore elements of copper,gold,silver,etc.,and ore-forming elements of sulfur,fluorine,etc.,which formed from the long-term water-rock interaction of the magmatic hydrothermal solution related to the intermediate-acid volcanic-intrusive complex of late Yanshan period and the granitoids of early Yanshan Period.