地球深部的不混溶金属熔体:来自火山岩中碳硅石的记录（英文）
发布时间：2023-02-11 12:25
碳硅石(SiC)以捕掳晶形式产于玄武质和金伯利质岩石中,为揭示深部地幔的C-H-O相互作用提供了新的窗口.碳硅石仅能稳定于氧逸度(fO2)<?IW-6的条件,而岩石圈地幔及相关熔体却更加氧化.本研究发现玄武质火山碎屑岩和金伯利岩中的碳硅石包含由Si0+Fe3Si7±FeSi2Ti±CaSi2Al2±FeSi2Al3±CaSi2构成的金属包裹体,其形态特征表明它们是捕获的熔体.碳硅石还包含具有结晶学取向且附存H2+CH4±CO2±CO的气体空洞.这些观察表明碳硅石结晶于含有还原性C-H-O组分的金属熔体(Si-Fe-Ti-C±Al±Ca),富集于岩石圈-软流圈、地壳-地幔这样的界面.当镁铁质-超镁铁质岩浆被持续注入H2+CH4时,岩浆逐步被还原,直至硅化物熔...
【文章页数】：10 页
【文章目录】：
1. Introduction
2. Geological background and samples
3. Analytical methods
4. Results
5. Discussion
5.1. Crystallization environment of moissanite
5.2. How was the moissanite generated?
5.3. Where was the moissanite formed?
5.4. Generation of moissanite in basaltic volcanic systems,and a kimberlitic analogue
6. Conclusions
Conflict of interest
Appendix A.Supplementary materials
Author contributions
Appendix A.Supplementary materials
本文编号：3740382
【文章页数】：10 页
【文章目录】：
1. Introduction
2. Geological background and samples
3. Analytical methods
4. Results
5. Discussion
5.1. Crystallization environment of moissanite
5.2. How was the moissanite generated?
5.3. Where was the moissanite formed?
5.4. Generation of moissanite in basaltic volcanic systems,and a kimberlitic analogue
6. Conclusions
Conflict of interest
Appendix A.Supplementary materials
Author contributions
Appendix A.Supplementary materials
本文编号：3740382
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