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采用Carius管溶样方法,通过热电离质谱对淮北煤田煤中黄铁矿样品的Re、Os含量及其同位素进行了测定,得出黄铁矿样品中Re和Os含量分别为1·22~1·29ng/g和0·0046~0·0054ng/g。对两个样品同位素定年测定得出,其年龄值分别为(73·9±3·2)Ma和(33±9)Ma,两个样品的年龄相差约258~286Ma。含量和同位素年龄差值表明两个样品是不同时代形成的黄铁矿。Re-Os同位素体系比值揭示黄铁矿所赋存的地质体受到来自地壳物质的显著混染。另外,γOTs参数也证实了这一点。该参数分别为+17和+18,表明了有富含Re母体的地壳物质的加入,这为煤中Re-Os含量及地质理论研究提供了参考资料。
The contents of Re, Os and their isotopes in samples of pyrite in coal from Huaibei Coalfield were determined by Carius tube-dissolving method and the results showed that the content of Re and Os in pyrite samples were respectively 1.22-1 · 29ng / g and 0 · 0046 ~ 0 · 0054ng / g. The isotopic dating of the two samples shows that the age values of the two samples are (73.9 ± 3.2) Ma and (33 ± 9) Ma, respectively. The two samples differ in age by about 258-286Ma. The difference in content and isotopic ages indicates that the two samples are pyrites formed from different ages. The Re-Os isotopic ratio reveals that the geologic bodies hosted by pyrite are significantly contaminated with crustal material. In addition, γOTs parameters also confirm this. The parameters are +17 and +18, respectively, suggesting the addition of crustal material rich in Re matrix, which provides a reference for the study of Re-Os content and geological theory in coal.