δ¹³C and δ¹⁸O Values for Carbonate from the Zoige Uranium Ore Field and Their Genetic Significance

详细信息   

• 责任者：Zhao Cong (Key Laboratory of Applied Nuclear Techniques in Geosciences ; Chengdu University of Technology ; Chengdu 610059 ; China) ; Chen Youliang
• 刊名：Acta Geologica Sichuan
• 出版年：2012
• 卷期：32(3)
• 关键词：铀矿 ; uranium ores ; 碳同位素 ; carbon isotopes ; 氧同位素 ; oxygen isotopes ; 四川 ; Sichuan Province
• 页码：p.272-275
• 图表：2 illus., 1 table, 10 refs.
• 分类号：1001
• issnNo：ISSN1006-0995
• isbnNo：CN51-1273/P

摘要

///This paper deals with δ¹³C and δ¹⁸O values for limestone, siliceous limestone and vein calcite from the ZoigE uranium ore field. The δ¹³C values vary from -1.48‰ to 3.18‰ with an average value of 1.51‰ characteristic of marine sedimentary carbonate and the δ¹⁸O values from -12.81‰ to -3.71‰ with an average value of -9.92‰. The δ¹³C values of the ore-bearing vein calcite range from -2.78‰ to -4.81‰ with an average of -3.93‰ characteristic of mantle-derived carbon and the δ¹⁸O values range from -13.14‰ to -15.05‰ with an average value of-13.87‰ ranging between the dyke and vein calcite in the uranium ore field. The δ¹³C values vary from -3.53‰ to -6.35‰ with an average of -4.93%o which are the same as the δ¹³C values for ore-bearing vein calcites, showing that it is also the product of mineralization. And the δ¹⁸O values vary from -16.00‰ to -24.75‰ with an average of -19.36‰ which is the lowest in the uranium ore field and is characteristic of deep sources. In a word, δ¹³C and δ¹⁸O values for carbonate from the Zoige uranium ore field indicate that the ore fluids should be mantle-derived.