Crystallization of a Monosulfide Solid Solution under Diamond Formation Parameters: Experiments in the Fe-Ni-S System

被引：0
|
作者：
Sharapova, N. Yu. [1 ]
Bobrov, A. V. [1 ,2 ]
Spivak, A. V. [1 ]
Shapovalov, Yu. B. [1 ]
机构：
[1] Russian Acad Sci, Korzhinskii Inst Expt Mineral, Chernogolovka, Moscow Oblast, Russia
[2] Moscow State Univ, Fac Geol, Moscow, Russia
来源：
DOKLADY EARTH SCIENCES | 2025年 / 520卷 / 01期
关键词：
phase relation; sulfide; inclusions in diamonds; HPHT; experiment; SULFIDE INCLUSIONS; KIMBERLITE PIPE; CARBON;
D O I：
10.1134/S1028334X24604413
中图分类号：
P [天文学、地球科学];
学科分类号：
07 ;
摘要：
Samples of a monosulfide solid solution (Mss) based on alpha-NiS and FeS have been obtained at P = 7.0 GPa and T = 900-1500 degrees C with presynthesized sulfide compounds using the solid-phase method at T = 400-600 degrees C. The structural and textural characteristics of the samples have been identified. Based on the features discovered and the chemical compositions of sulfide phases, a fragment of the phase diagram in the Fe-Ni-S system has been constructed with the assumed solidus and liquidus lines set. Thus, the obtained results show that in the studied range of compositions a complete series of solid solutions of minerals is formed. The evolution in the composition of the monosulfide solid solution and of the corresponding sulfide melt under diamond formation conditions as a function of temperature change has been traced. We have obtained preliminary estimates for the maximum Ni content in sulfide melts (up to 58 wt %), which may crystallize the minerals found in inclusions in natural diamonds of the peridotite paragenesis.
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页数：6
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