E. S. Persikov, P. G. Bukhtiyarov, A. G. Sokol, A. N. Nekrasov, D. M. Sultanov
{"title":"上地幔P-T条件下玄武岩-金伯利岩熔体相互作用中主要组分(SiO2、Al2O3、Na2O、CaO、MgO和FeO)和\\({\\text{CO}}_{3}^{{2 - }}\\)阴离子的化学反扩散实验研究","authors":"E. S. Persikov, P. G. Bukhtiyarov, A. G. Sokol, A. N. Nekrasov, D. M. Sultanov","doi":"10.1134/S0869591124700346","DOIUrl":null,"url":null,"abstract":"<p>This paper reports new experimental results on the chemical counterdiffusion of major components (SiO<sub>2</sub>, Al<sub>2</sub>O<sub>3</sub>, Na<sub>2</sub>O, CaO, MgO, and FeO) and the <span>\\({\\text{CO}}_{3}^{{2 - }}\\)</span> anion during interaction of basalt and kimberlite melts under upper-mantle pressure. The method of diffusion couples was employed on a BARS split-sphere apparatus at 5.5 GPa and 1850°C. It was shown that the rates of chemical counterdiffusion of all major melt species (SiO<sub>2</sub>, Al<sub>2</sub>O<sub>3</sub>, Na<sub>2</sub>O, CaO, MgO, and FeO) and the <span>\\({\\text{CO}}_{3}^{{2 - }}\\)</span> anion are almost identical during interaction of model basalt and carbonate-bearing kimberlite melts and approximately an order of magnitude higher than the diffusion rates of these components during melt interaction under moderate pressures (100 MPa). The equal diffusion rates of CaO and <span>\\({\\text{CO}}_{3}^{{2 - }}\\)</span> indicate that molecular CaCO<sub>3</sub> diffusion from the kimberlitic to basaltic melt (model and natural) occurs also at the high pressure. The diffusion patterns are dramatically different during interaction of natural magnesian basalt and model kimberlite, which was observed for the interaction of these melts at moderate pressure. In addition to the molecular diffusion of CaCO<sub>3</sub> into the magnesian basalt, the diffusion rates of other melt species increase significantly. All diffusing components show weak exponential dependence on concentrations approaching <i>D</i><sub><i>i</i></sub> = const, similar to that observed during interaction of such melts at moderate pressures.</p>","PeriodicalId":20026,"journal":{"name":"Petrology","volume":"33 2","pages":"130 - 138"},"PeriodicalIF":1.0000,"publicationDate":"2025-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Experimental Study of Chemical Counterdiffusion of Major Components (SiO2, Al2O3, Na2O, CaO, MgO, and FeO) and \\\\({\\\\text{CO}}_{3}^{{2 - }}\\\\) Anion during Interaction of Basalt and Kimberlite Melts under Upper Mantle P–T Conditions\",\"authors\":\"E. S. Persikov, P. G. Bukhtiyarov, A. G. Sokol, A. N. Nekrasov, D. M. Sultanov\",\"doi\":\"10.1134/S0869591124700346\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>This paper reports new experimental results on the chemical counterdiffusion of major components (SiO<sub>2</sub>, Al<sub>2</sub>O<sub>3</sub>, Na<sub>2</sub>O, CaO, MgO, and FeO) and the <span>\\\\({\\\\text{CO}}_{3}^{{2 - }}\\\\)</span> anion during interaction of basalt and kimberlite melts under upper-mantle pressure. The method of diffusion couples was employed on a BARS split-sphere apparatus at 5.5 GPa and 1850°C. It was shown that the rates of chemical counterdiffusion of all major melt species (SiO<sub>2</sub>, Al<sub>2</sub>O<sub>3</sub>, Na<sub>2</sub>O, CaO, MgO, and FeO) and the <span>\\\\({\\\\text{CO}}_{3}^{{2 - }}\\\\)</span> anion are almost identical during interaction of model basalt and carbonate-bearing kimberlite melts and approximately an order of magnitude higher than the diffusion rates of these components during melt interaction under moderate pressures (100 MPa). The equal diffusion rates of CaO and <span>\\\\({\\\\text{CO}}_{3}^{{2 - }}\\\\)</span> indicate that molecular CaCO<sub>3</sub> diffusion from the kimberlitic to basaltic melt (model and natural) occurs also at the high pressure. The diffusion patterns are dramatically different during interaction of natural magnesian basalt and model kimberlite, which was observed for the interaction of these melts at moderate pressure. In addition to the molecular diffusion of CaCO<sub>3</sub> into the magnesian basalt, the diffusion rates of other melt species increase significantly. All diffusing components show weak exponential dependence on concentrations approaching <i>D</i><sub><i>i</i></sub> = const, similar to that observed during interaction of such melts at moderate pressures.</p>\",\"PeriodicalId\":20026,\"journal\":{\"name\":\"Petrology\",\"volume\":\"33 2\",\"pages\":\"130 - 138\"},\"PeriodicalIF\":1.0000,\"publicationDate\":\"2025-04-21\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Petrology\",\"FirstCategoryId\":\"89\",\"ListUrlMain\":\"https://link.springer.com/article/10.1134/S0869591124700346\",\"RegionNum\":4,\"RegionCategory\":\"地球科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"GEOCHEMISTRY & GEOPHYSICS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Petrology","FirstCategoryId":"89","ListUrlMain":"https://link.springer.com/article/10.1134/S0869591124700346","RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"GEOCHEMISTRY & GEOPHYSICS","Score":null,"Total":0}
Experimental Study of Chemical Counterdiffusion of Major Components (SiO2, Al2O3, Na2O, CaO, MgO, and FeO) and \({\text{CO}}_{3}^{{2 - }}\) Anion during Interaction of Basalt and Kimberlite Melts under Upper Mantle P–T Conditions
This paper reports new experimental results on the chemical counterdiffusion of major components (SiO2, Al2O3, Na2O, CaO, MgO, and FeO) and the \({\text{CO}}_{3}^{{2 - }}\) anion during interaction of basalt and kimberlite melts under upper-mantle pressure. The method of diffusion couples was employed on a BARS split-sphere apparatus at 5.5 GPa and 1850°C. It was shown that the rates of chemical counterdiffusion of all major melt species (SiO2, Al2O3, Na2O, CaO, MgO, and FeO) and the \({\text{CO}}_{3}^{{2 - }}\) anion are almost identical during interaction of model basalt and carbonate-bearing kimberlite melts and approximately an order of magnitude higher than the diffusion rates of these components during melt interaction under moderate pressures (100 MPa). The equal diffusion rates of CaO and \({\text{CO}}_{3}^{{2 - }}\) indicate that molecular CaCO3 diffusion from the kimberlitic to basaltic melt (model and natural) occurs also at the high pressure. The diffusion patterns are dramatically different during interaction of natural magnesian basalt and model kimberlite, which was observed for the interaction of these melts at moderate pressure. In addition to the molecular diffusion of CaCO3 into the magnesian basalt, the diffusion rates of other melt species increase significantly. All diffusing components show weak exponential dependence on concentrations approaching Di = const, similar to that observed during interaction of such melts at moderate pressures.
期刊介绍:
Petrology is a journal of magmatic, metamorphic, and experimental petrology, mineralogy, and geochemistry. The journal offers comprehensive information on all multidisciplinary aspects of theoretical, experimental, and applied petrology. By giving special consideration to studies on the petrography of different regions of the former Soviet Union, Petrology provides readers with a unique opportunity to refine their understanding of the geology of the vast territory of the Eurasian continent. The journal welcomes manuscripts from all countries in the English or Russian language.