| 凡口铅锌矿床同位素地球化学证据 |
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| 关键词:sulfur isotope lead isotope oxygen and hydrogen isotope lead and zinc deposit Fankou |
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| Isotope Geochemica Evidence of the Fankou Lead and Zinc Deposit |
| The determination of mineral inclusions for their temperature,sulfur and lead isotopes at different ore-forming stages in the Fankou lead and zinc deposit shows that the temperature are 300±50℃ at the first stage and 250±50℃ at the second and third stages. The isotope compositions are 2.1‰～26.5‰ with δ34SPy＞δ34SSp＞δ34SGn；The isotope compositions of sulfides at the first stage tend to decrease from the older to younger strata.δ34S values are 14.3‰～23.8‰ for sulfides at Stage Ⅱ，and δ34S are 5.7％～15.7‰ for sulfides at Stage I with the tendency of varying in a decreasing range and becoming smaller in value.The lead isotope obtained from 68 samples are 18.023～18.847；207Pb/204Pb ratios are 15.700～15.820,and 208Pb/204Pb ratios are 38.056～39.796.206Pb/204Pb ratios of the whole rock of limestone are 18.230～18.860；207Pb/204Pb ratios are 15.640～16.000；208Pb/204Pb ratios are 38.714～39.760. 206Pb/204Pb ratios of diabase are 18.570～18.650,207Pb/204Pb ratios are 15.260～15.620；and 208Pb/204Pb ratios are 38.650～38.960.δ18OH2Ovalues of the first stage are 12.3‰～13.1‰，and δD are －50.2‰～－61.5‰；δ18OH2O of the second stage are －2.4‰～＋10.8‰，and δD are－50.2‰～－63.2‰；δ18OH2O of the third stage are -4.9‰～－14.3‰，δD are －59.0‰～－61.0‰。 |
| WANG Liming,XU Wenxin,LI Heng,PENG Shenglin.2005.Isotope Geochemica Evidence of the Fankou Lead and Zinc Deposit[J].Acta Geoscientica Sinica,26(z1):164-167. |
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