Synthesis of NH4-Substituted Muscovite at 6.3 GPa and 1000°C: Implications for Nitrogen Transport to the Earth’s Mantle
Synthesis of NH4-Substituted Muscovite at 6.3 GPa and 1000°C: Implications for Nitrogen Transport to the Earth’s Mantle
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在 6.3 GPa 和 1000°C 下合成 NH4 取代的白云母：对氮传输到地幔的影响
DOI：
10.1134/s1028334x18030315
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发表时间：
2018
影响因子：
0.9
通讯作者：
N. Sobolev
中科院分区：
文献类型：
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作者：
A. Sokol;E. Sokol;I. Kupriyanov;N. Sobolev
在P = 6.3GPa和T = 1000°C下，与NH_3-H_2O流体平衡，进行了含NH_4白云母的合成。经测定，新形成的白云母富含绿松石，含有约370 ppm的NH 4。所获得的数据使人们有可能得出结论，含铵云母有足够的热稳定性，并可以运输地壳氮的地幔中的存在下，减少水氨流体在fO 2小于IW + 2日志单位的值，即使在制度的“热”俯冲。决定这一机制的效率为深氮循环的关键参数是氧化还原稳定性的NH 4轴承白云母在地幔PT参数。
The synthesis of NH4-bearing muscovite at P = 6.3 GPa and T = 1000°C in equilibrium with NH3–H2O fluid is performed. It is determined that the newly formed muscovite is enriched in celadonite minal and contains ~370 ppm of NH4. The obtained data make it possible to conclude that ammonium-bearing micas have sufficient thermal stability and can transport crustal nitrogen to the mantle in the presence of a reduced water–ammonia fluid at fO2 less than the values of IW + 2 log units even in the regime of “hot” subduction. The key parameter that determines the efficiency of this mechanism for the deep nitrogen cycle is redox stability of NH4-bearing muscovite at the mantle PT–parameters.
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