| 谭泽模,唐龙飞,黄敦杰,蔡明海,彭振安,常江,赵京.广西大厂矿田C、H、O同位素及成矿流体来源研究[J].矿产勘查,2014,5(5):738-743 |
| 广西大厂矿田C、H、O同位素及成矿流体来源研究 |
| Study on isotopes of carbon, hydrogen and oxygen and sources of ore-forming fluids in the Dachang tin orefield, Guangxi |
| 投稿时间：2014-02-21 |
| DOI： |
| 中文关键词: 成矿流体 C、O同位素 H、O同位素 大厂矿田 广西 |
| 英文关键词: ore-forming fluid carbon and oxygen isotope hydrogen and oxygen isotope Dachang tin ore field Guangxi |
| 基金项目:广西大厂锡石硫化物型锡矿科学基地研究项目(编号:200911007-13)资助。 |
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| 中文摘要: |
| 桂西北南丹县境内的大厂矿田由锡石硫化物型锡多金属矿、夕卡岩型锌铜矿和热液脉型钨锑矿组成。通过系统研究大厂矿田不同矿化类型矿石以及围岩的C、H、O同位素组成,得出结果显示:从远离矿体无蚀变围岩→近矿蚀变围岩→矿体,δ13C平均值分别为0.88‰、-0.74‰、-7.09‰,δ18O平均值分别为22.58‰、16.00‰、14.42‰,δ13C值与δ18O值均表现出依次降低的特点；夕卡岩型锌铜矿、锡多金属矿和钨锑矿的δ18OH2O值与δD值的关系则显示,大厂矿田的成矿流体是具有多来源的。C、H、O同位素的组成特征表明,大厂矿田锌铜矿和锡多金属矿的成矿作用均与龙箱盖岩体有关,这为进一步探讨大厂矿田夕卡岩型锌铜矿、锡多金属矿、钨锑矿成矿流体来源及成矿热液的运移方向提供了参考资料。 |
| 英文摘要: |
| The Dachang tin ore field located in Nandan city, westnorthern Guangxi, consist of cassiterite-sulfide type tin polymetallic deposit, skarn type zinc-copper deposit and hydrothermal vein type W-Sb deposit. Based on the systematic study of isotope compositions of carbon, hydrogen and oxygen in different types of tin ores and country rocks, the average values of δ13C and δ18O in the country rock, altered country rock nearby orebody and tin ore, are 0.88‰, -0.74‰ and -7.09‰; 22.58‰, 16.00‰ and 14.42‰ respectively, it shows that the values of δ13C and δ18O reduce gradually from the country rock to the tin ore.From the relationship of values of δ18O and δ18OH2O and δD in the skarn zinc-copper deposit, tin polymetallic deposit and W-Sb deposit, it reveals that ore-forming fluid in the Dachang tin ore field comes from multi sources. The composition characteristics of carbon, hydrogen and oxygen isotopes indicate that both of mineralization within zinc-copper ore deposit and tin polymetallic ore deposit are related to the Longxianggai granitite intrusion. The study result will provide systematic information for the further study of ore-forming fluid sources and migration direction of ore-forming hydrothermal fluid in the zinc-copper deposit, tin polymetallic ore deposit and W-Sb ore deposit in the Dachang tin ore field. |
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