High pressure reactions between metals and silicates: implications for the light element in the core and core-mantle interactions
High pressure reactions between metals and silicates: implications for the light element in the core and core-mantle interactions
复制标题
金属和硅酸盐之间的高压反应：对地核中轻元素以及核幔相互作用的影响
DOI：
10.1180/minmag.1998.62a.1.329
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发表时间：
1998
期刊：
影响因子：
--
通讯作者：
R. Boehler
中科院分区：
文献类型：
--
作者：
V. Hillgren;R. Boehler
地核起源和演化中的两个长期存在的问题是轻合金元素(S)的同一性和直接覆盖其上的地震异常D“层的起源和性质。可能解决这两个问题的关键在于高压和高温化学。Ringwood和他的同事(1990a和b)表明，高压增加了O和其他氧化物在铁金属中的溶解度。因此，在高压下，O和Si元素可能会在铁金属中充分溶解，从而对核心中的轻元素收支有很大贡献。此外，D“层的一个提出的来源是液态金属外核和其上的固体硅酸盐地幔之间的化学反应(Knittle和Jeanloz 1989,1991)。为了研究这些可能的化学作用的性质和程度，我们已经开始了对金属和硅酸盐之间的高压和高温反应的金刚石顶压室的研究。
Two long standing problems in the origin and evolution of the Earth's core are the identity of the light alloying element(s) and the origin and nature of the seismically anomalous D" layer directly overlying it. It is possible that the key to both these problems lies in high pressure and temperature chemistry. Ringwood and colleagues (1990a and b) showed that high pressure increased the solubility of O and other oxides in Fe-metal. Thus, at high pressures elements O and Si may become soluble enough in Fe-metal for them to contribute significantly to the light element budget in the core. In addition, one proposed origin of the D" layer is a chemical reaction between the liquid metal outer core and the solid silicate mantle overlying it (Knittle and Jeanloz 1989, 1991). In order to investigate the nature and extent of these possible chemical interactions, we have begun a diamond anvil cell study of the high pressure and temperature reactions between metal and silicate.