| 岩浆热液矿床最佳成矿部位探讨 |
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| 引用本文： | 张,旗.岩浆热液矿床最佳成矿部位探讨[J].甘肃地质学报,2013,22(3):1-11. |
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| 作者姓名： | 张 旗 |
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| 作者单位： | 中国科学院地质与地球物理研究所 |
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| 基金项目： | 国家自然科学基金重大研究计划(91014001)项目资助的研究 |
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| 摘 要： | 与花岗质岩浆有关的热液矿床最佳成矿部位是一个具有探索性的课题,它依据的理论是:与花岗岩有关的热液成矿作用是一系列复杂的化学反应过程;它有两个前提:成矿是中—低温化学反应导致成矿元素沉淀的产物;成矿作用不同程度与大气水的加入有关。热液矿床形成于地壳浅部,限定在大气水临界面(critical plane of the meteoric water)和成矿上限临界面(critical plane of the mineralization upper limit)之间。来自深部的含矿热液抵达这个部位,物理化学条件发生了急剧变化,可能引发剧烈的化学反应,中—低温环境和地表水的加入则有利于成矿元素的沉淀,遂使该带成为最有利于成矿的部位。大气水临界面是大气水向下循环的下界,是一个极不规则的界面,主要受地表水供应量、温度、岩性、构造等因素的制约。成矿上限临界面主要受温度和隔档层的制约,尤其隔档层,可能是某些大型和超大型矿床的聚集地。无水不成矿,无地下水不成矿,看来是有道理的。探讨与花岗岩有关的热液金属矿床的最佳成矿部位对于指导深部找矿是有意义的。
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| 关 键 词： | 花岗岩 热液 矿床 最佳成矿部位 大气水 临界面 深部找矿 |
Discussion on the Site of the Best Mineralization of Magmatic Hydrothermal Deposits |
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| ZHANG Qi.Discussion on the Site of the Best Mineralization of Magmatic Hydrothermal Deposits[J].Acta Geologica Gansu,2013,22(3):1-11. |
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| Authors: | ZHANG Qi |
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| Institution: | ZHANG Qi;Institute of Geology and Geophysics,Chinese Academy of Sciences; |
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| Abstract: | The site of the best mineralization of magmatic hydrothermal mineralization related to granites are a exploratory subject based on the theory that hydrothermal metal mineralization is a series of chemical reactions. It has two premises: mineralization is a product of medium-high to medium-low temperature chemical reactions lead to the precipitation of ore-forming elements; mineralization is relevant to the accession of the meteoric water. The site of the best mineralization is located in the shallow crust, limited to between the critical plane of the meteoric water and critical plane of the mineralization upper limit. Arrived in this part of the ore-bearing hydrothermal fluids from deep, physical and chemical conditions changed dramatically, and may lead to a rapid chemical reaction. Medium-low temperature environment and surface water are helpful for the precipitation of the ore-forming elements, and these make the band to be the best mineralization parts. Meteoric water critical plane is the lower bound of the downward cycle of meteoric water, and it is a very irregular interface, mainly due to the impact of surface water supply, temperature, lithology, structure, etc. Mineralization upper limit of the critical plane is mainly affected by the constraints of temperature and every other file layer, in particular, every other file layer, may be some large and super-large deposit gathering place. No water no mineralization, no groundwater no mineralization, it seems to be true for the magma-hydrothermal deposits. Disscussion on the site of the best mineralization of magma-hydrothermal deposits formation related to granites for the guidance of deep prospecting may be meaningful. |
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| Keywords: | magma hydrothermal metallic deposits site of the best mineralization meteoric water critical plane prospection on deep ore body |
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