| 夏杖子金矿床同位素组成及其地质意义 |
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| 引用本文： | 李纪良.夏杖子金矿床同位素组成及其地质意义[J].地质与资源,1993,2(2):147-155. |
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| 作者姓名： | 李纪良 |
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| 作者单位： | 河北省地质矿产局第二地质大队 |
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| 摘 要： | 夏杖子金矿床中矿物包裹体水的氢、氧同位素分别为：δD=-91.7‰——73.1‰，δ18OH2o=5.68‰-6.23‰，说明读矿床的成矿溶液是来源于岩浆水和大气降水；矿物的硫同位素组成基本上全是负值，且变化范田较小，同位素平衡温度平均为208-240℃，成矿溶液总硫平均同位素组成-19.70‰——20.64‰，证明成矿热液中H2S原子团占优势，其硫源可能为本区结晶基底；石英中流体包裹体Rb-Sr同位素等时年龄为105±7.2Ma，说明其成矿时代为燕山晚期。综合分析认为，该矿床为与岩浆热液有关的中-低温热液脉型金矿床。
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| 关 键 词： | 金矿床 同位素组成 成矿年龄 河北青龙县夏杖子 |
| 收稿时间： | 1992-05-06 |
ISOTOPIC COMPOSITION OF XIAZHANGZI GOLD DEPOSIT AND ITS GEOLOGICAL IMPLICATION |
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| Li Jiliang.ISOTOPIC COMPOSITION OF XIAZHANGZI GOLD DEPOSIT AND ITS GEOLOGICAL IMPLICATION[J].Geology and Resources,1993,2(2):147-155. |
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| Authors: | Li Jiliang |
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| Institution: | No.2 Geological Brigade, Bureau of Geology and Mineral Resources of HebeiProvince |
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| Abstract: | The oxygen and hudrogen isotopic compositions of inclusion water in Xiazhangzi gold deposit are respectively SD=- 91. 7‰0-73. l/‰and δ18OHgo = 5. 6‰-6. 23‰-The miner-alizing fluids of the deposit come from magmatic and meteoric water With a narrow range of change, the S-isotopic compositions are nearly all minus and the average equilibrium tem-perature varies from 208℃ to 240℃; the average isotopic composition of total sulphur in the mineralizing fluids ranges from -19. 70‰ to -20. 64‰, indicating that atom group H2S pre-vailed in the fluids and the sulphur derived from the crystal basement in this area. The Rb-Sr isotopic isochron value (105±7. 2Ma) of quartz fluid inchusions implies a late Yanshanian mineralization. This deposit is of epi-mesothermal vein type related with magmatic hy-drothermal solution. |
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| Keywords: | gold deposit isotopic composition metallogenic age Hebei Xiazhangzi |
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