| 煌斑岩与某些热液矿床关系新探──兼论幔源C－H－O流体的分异演化 |
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| 引用本文： | 孙丰月,石准立.煌斑岩与某些热液矿床关系新探──兼论幔源C－H－O流体的分异演化[J].地质找矿论丛,1995,10(2):72-81. |
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| 作者姓名： | 孙丰月 石准立 |
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| 作者单位： | 长春地质学院;中国地质大学 |
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| 摘 要： | 本文指出了煌斑岩与某些热液矿床之间在大的时、空尺度上密切相关，而在小尺度上刚具有明显的独立性，提出并论证了煌斑岩及某些热液矿床形成过程中的幔源Ｃ－Ｈ－Ｏ流体的分异演化模式，即溶解了大量常量及微量元素的高温幔源Ｃ－Ｈ－Ｏ流体上升进入地壳后，因压力降低及挥发分组成的岩化发生分异作用，形成相对富含铁镁质的硅酸盐流体及相对富含硅碱质的Ｃ－Ｈ－Ｏ流体，前者在地壳浅部定位形成钙碱性煌斑岩，而后者则引发并参与了
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| 关 键 词： | 煌斑岩 热液矿床 幔源 C－H－O流体 岩浆 |
| 收稿时间： | 1994/12/7 0:00:00 |
| 修稿时间： | 1995/1/11 0:00:00 |
THE RELATIONSHIP BETWEEN LAMPROPHYRES AND SOME HYDROTHERMAL DEPOSITS:IMPLICATIONS FOR A DIFFERENTIATION MODEL OF MANTLE-DERIVED C-H-O FLUIDS |
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| Sun Fengyue and Shi Zhunli.THE RELATIONSHIP BETWEEN LAMPROPHYRES AND SOME HYDROTHERMAL DEPOSITS:IMPLICATIONS FOR A DIFFERENTIATION MODEL OF MANTLE-DERIVED C-H-O FLUIDS[J].Contributions to Geology and Mineral Resources Research,1995,10(2):72-81. |
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| Authors: | Sun Fengyue and Shi Zhunli |
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| Institution: | Changchun College of Gedgy;China University of Geosciences |
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| Abstract: | In regional scale, calc-alkaline lamprophyres are related to hydrothermal deposits temporaly and spatialy while they are independent in small scale. On the basis of analysing the geological features of lamprophyres and hydrothermal deposits and the activity of mantle-derived C-H-O fluids, the authors have proposed the differentiation model of the mantle-derived C-H-O fluids with respect to the formation of lamprophyres and mineral deposits. When the high-temperature dense mantle-derived C-H-O fluids that contain a large amount of major and minor elements move upwardly into the lower crust, differentiation takes place, due to pressure drop or other changes,forming a Mg-and Fe-rich valotile-saturated silicate liquid phase and a Si-and alkalis-rich C-H-O fluid phase. The former migrates upwardly and emplaces in the upper crust to form lamprophyre dykes. And the latter takes part in some hydrothermal mineralization. |
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