Alkaline Mantle Fluids and Alkali-Rich Hydrothermal Metallogenesis <?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /><o:p></o:p>

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Alkaline Mantle Fluids and Alkali-Rich Hydrothermal Metallogenesis

详细信息

责任者：Du Letian (Beijing Institute of Uranium Geology ; Beijing 100029 ; China) ; Wang Wenguang
刊名：Mineral Deposits
出版年：2009
卷期：28(5)
关键词：地幔流体 ; mantle fluids ; 热液矿床 ; hydrothermal deposit ; 碱性交代作用 ; alkali metasomatism
页码：p.599-610
图表：5 illus., 6 tables, 3 photos, 38 refs.
分类号：1001
issnNo：ISSN0258-7106
isbnNo：CN11-1965/P

摘要

An important ore-forming regularity concerning the alkaline metasomatism in literature has been long neglected. In the past 30 years, the authors have gradually found out that the alkaline metasomatic process constitutes the crucial ore-forming mechanism, as evidenced by the following facts: 1) the whole hydrothermal process starts with the alkaline metasomatism (the introduction of K⁺ and Na⁺ to the altered rocks); 2) this process provides ore sources by leaching and extracting of ore components from pathway rocks through metasomatism; 3) the process can promote the hydrothermal solution transition from alkaline to acidic by the exhaustion of K⁺ and Na⁺ in the solution and the destruction of the stable migration forms of ore components, thus resulting in their precipitation; and 4) alkaline metasomatic rocks become very porous, which is favorable for the introduction and penetration of ore-forming solution and provides ore and oil- gas traps.

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