| 内蒙古额仁陶勒盖银矿水—岩相互作用及矿石沉淀氢氧同位素研究 |
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| 引用本文：张理刚,陈振胜,刘敬秀,王可法,于桂香,刘珍明,张永振.1994.内蒙古额仁陶勒盖银矿水—岩相互作用及矿石沉淀氢氧同位素研究[J].地球学报,15(1,2):131-137. |
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| 中文摘要:该文系统分析了内蒙古额仁陶勒盖银矿石英、蚀变岩石的氢氧同位素组成。蚀变岩石δ￣（１８）Ｏ和δＤ值分别为５．２‰到－７．３‰和－１３３‰到－１５５‰之间。矿物包体的δＤ值为－１４１‰到－１４７‰之间。很低的δ￣（１８）Ｏ和δＤ值，暗示出是大气降水－岩石交换体系中形成的成矿流体。脉石英的δ￣（１８）Ｏ值与蚀变岩石的δ￣（１８）Ｏ值相比，前者普遍低于后者，因而暗示可能存在两期成矿流体。 |
| 中文关键词:水－岩反应，氢氧同位素，额仁陶勒盖银矿 |
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| A H,O STABLE ISOTOP STUDY ON THE WATER-ROCKINTERACTION AND MINERAL DEPOSITION IN THEEREN SILVER DEPOSIT, INNER MONGOLIA |
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| Abstract:A relatively systematic oxysen and hydrosen isetopic compositions of vein quartz and alteredreeks were analysed from the Eren silver deposit ,Inner Monsolia. The oxygen and hydrogen isotopic of55 altered reeks range from-4. 5‰t0,to +4. 7‰, and from-132‰, to 155‰, respectively.δ￣(18)Oof 6 vein quartzes vary from 0. 8‰ to 7. 3‰ with the δD values of 3 fluid inclusions chansingfrom-141‰,to-147‰. Such lowerδ￣(18)O and δD values indicate that the oreformins fluids formedat a meteoric water rock exchanse system. Vein quartzes have δ￣(18)O values lower than altered rocksconiparatiely showins the possible existins of twostage fluids.The fluid having oxysen isotopic compositions exisitions of around-5. 7‰ which formed at theearly stase durins mettoric waterreek interacted at the depth at below 300℃ with the effective W/Rratio of about 0. 4,then entered the upper mineralized system and interacted asain with the volcanicrocks(the second stase)and the effective W/R are about >5. 0. These processes produced the knownoxygen isotopic compositions of altered rocks, The quartz veins were formed by fissure-filling deposi-tions from fluids with δ￣(18)O values of about-16‰ and the fluids is related to the deep metoric waterinteracted with magmatite at below 300℃ with water to rock ratio of about 5. 0.The hydrogen isotopic compositions of 5 altered reeks are similar to or just a bit higher that thosefroin 3 quartz in quartz inclusion watere.The slightly higher hydrogen isotopic compositions of alteredreeks susgestins it is a hydrogen isotope dynamical fractionation which is probably the de-hydrogen ofthe boiling and diffusive preeess in epizonal environment. |
| keywords:water-rock interaction H-O stable isotope Eren silver deposit |
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