Sediment Geochemical Character of Carboniferous "Qingzhen-Type Fe Deposit" in Central Guizhou Area
详细信息
- 责任者：Yang Ruidong (Guizhou University ; Guiyang 550003 ; China) ; Yuan Shiting
- 刊名：Geological Review
- 出版年：2011
- 卷期：57(1)
- 关键词：铁矿 ; iron ores ; 沉积地球化学 ; sedimentary geochemistry ; 贵州 ; Guizhou Province
- 页码：p.24-35
- 图表：8 illus., 1 table, 27 refs.
- 分类号：1001
- issnNo：ISSN0371-5736
- isbnNo：CN11-1952/P
摘要
In this paper, the authors discover with sedimentary geological, mineral association and geochemical study that the iron ores of "Qingzhen-type Fe deposit" in Lindai and Weicheng, Qingzhen City, Changchong, Longli County, consists of hematite and siderite; the Fe-bearing rocks are riched in rare earth element and trace element Zr, Ga, Ge, Sc, Ti, ΣREE from 75.71 to 859.45×10-6, Sc are up to 20×10-6, which are of very important value in economic; all Sr/Ba ratio values of Fe-bearing rocks are >1, Th/U ratio values are 2 to 7, similar to those of the "Shanxi-type iron deposit", which suggests that the Fe-bearing rocks formed in lagoon and affected by sea water. Chondrite-normalized rare earth element patterns of the Qingzhen-type Fe deposit show that Eu is remarkable negative anomaly and Ce is weak negative anomaly. The δ13C PDB values of siderite are -3.21‰~-7.24‰, lower than those values of other sediment-type Fe deposit and sediment metamorphic–type Fe deposit.
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