Discussion on the Site of the Best Mineralization of Magmatic Hydrothermal Deposits
详细信息
- 责任者：Zhang Qi (Institute of Geology and Geophysics ; Chinese Academy of Sciences ; Beijing 100029 ; China)
- 刊名：Gansu Geology
- 出版年：2013
- 卷期：22(3)
- 关键词：岩浆矿床 ; magmatic deposit ; 热液矿床 ; hydrothermal deposit
- 页码：p.1-11
- 图表：4 illus., 38 refs.
- 分类号：1001
- issnNo：ISSN1004-4116
- isbnNo：CN 62-1191/P
摘要
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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