학술논문
Synthesis of N[H.sub.4]-Substituted Muscovite at 6.3 GPa and 1000[degrees]C: Implications for Nitrogen Transport to the Earth's Mantle
Document Type
Academic Journal
Author
Source
Doklady Earth Sciences. March, 2018, Vol. 479 Issue 1, p404, 4 p.
Subject
Language
English
ISSN
1028-334X
Abstract
The synthesis of N[H.sub.4]-bearing muscovite at P = 6.3 GPa and T = 1000[degrees]C in equilibrium with N[H.sub.3]-[H.sub.2]O fluid is performed. It is determined that the newly formed muscovite is enriched in celadonite minal and contains ~370 ppm of N[H.sub.4]. 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 [mathematical expression not reproducible] 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 N[H.sub.4]-bearing muscovite at the mantle PT-parameters. DOI: 10.1134/S1028334X18030315
The scales and mechanisms of nitrogen transport to the deep Earth are in the focus of scientific interests during a long time. It is proved that nitrogen, which originally occurs [...]
The scales and mechanisms of nitrogen transport to the deep Earth are in the focus of scientific interests during a long time. It is proved that nitrogen, which originally occurs [...]