SPECTROSCOPIC 2D-TOMOGRAPHY: RESIDUAL PRESSURE AND STRAIN AROUND MINERAL INCLUSIONS IN DIAMONDS
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dc.contributor.author | Nasdala L. | |
dc.contributor.author | Hofmeister W. | |
dc.contributor.author | Brenker F.E. | |
dc.contributor.author | Glinnemann J. | |
dc.contributor.author | Gasparik T. | |
dc.contributor.author | Harris J.W. | |
dc.contributor.author | Stachel T. | |
dc.contributor.author | Reese I. | |
dc.date.accessioned | 2021-11-28T04:25:39Z | |
dc.date.available | 2021-11-28T04:25:39Z | |
dc.date.issued | 2003 | |
dc.identifier | https://www.elibrary.ru/item.asp?id=14268063 | |
dc.identifier.citation | European Journal of Mineralogy, 2003, 15, 6, 931-935 | |
dc.identifier.issn | 0935-1221 | |
dc.identifier.uri | https://repository.geologyscience.ru/handle/123456789/32582 | |
dc.description.abstract | We have studied high-pressure inclusions (Ca-silicates, coesite, graphite) in three large diamonds, one from the Kankan district, Guinea, and the other two from the Panda kimberlite, Ekati diamond mines, Canada. Using the in situ point-by-point mapping technique with a confocal Raman system, the mineralogy of the inclusions, as well as their area distribution pattern (e.g., of different Ca-silicate phases) and their order-disorder distribution pattern (shown for graphite/disordered carbon), were determined. Raman mapping of the host diamonds yielded 2D-tomographic pressure and strain distribution patterns and provided information on the residual pressure of the inclusions (similar to2.3 GPa for a coesite inclusion and similar to2.6 GPa for a graphite inclusion). The inclusions are surrounded by haloes of significantly enhanced pressure, several hundred mum across. These haloes exhibit complex pressure relaxation patterns that consist of micro-areas affected by both compressive and dilative strain, with the latter being intensive enough to result in apparent "negative pressures". | |
dc.subject | Diamond | |
dc.title | SPECTROSCOPIC 2D-TOMOGRAPHY: RESIDUAL PRESSURE AND STRAIN AROUND MINERAL INCLUSIONS IN DIAMONDS | |
dc.type | Статья |
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