METAPELITES OF THE KANSKIY GRANULITE COMPLEX (EASTERN SIBERIA): KINKED P-T PATHS AND GEODYNAMIC MODEL
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dc.contributor.author | Gerya T.V. | |
dc.contributor.author | Maresch W.V. | |
dc.date.accessioned | 2022-03-24T08:31:07Z | |
dc.date.available | 2022-03-24T08:31:07Z | |
dc.date.issued | 2004 | |
dc.identifier | https://www.elibrary.ru/item.asp?id=13459728 | |
dc.identifier.citation | Journal of Petrology, 2004, 45, 7, 1393 | |
dc.identifier.issn | 0022-3530 | |
dc.identifier.uri | https://repository.geologyscience.ru/handle/123456789/36598 | |
dc.description.abstract | The Southern Yenisey Range (Eastern Siberia) consists of the granulite-facies Kanskiy complex bordered by the lower-grade Yeniseyskiy and Yukseevskiy complexes. Samples of metapelite of the Kanskiy complex typically show characteristic garnet-forming reaction textures and near-isobaric cooling P-T paths. An important new result of this study concerns the difference in shape of the P-T paths from different parts of the Kanskiy granulite complex: metapelites collected similar to8 km from the boundary with the Yeniseyskiy complex followed a linear path with dP/dT approximate to 0.006 kbar/degreesC; metapelites collected similar to3 km from this boundary reveal a kinked P-T path with an interval of burial cooling (dP/dT approximate to -0.006 kbar/degreesC). The difference in the shape of the P-T paths is supported by the chemical zoning of garnet studied in the second group of samples. A mechanism of buoyant exhumation of granulite is suggested by comparison with the results of numerical modelling, which indicate that such a diversity of P-T paths may result from a transient disturbance of the thermal structure by rapid differential movement of material from different crustal levels. To arrive at a correct tectonic interpretation, the whole assemblage of interrelated P-T paths of metamorphic rocks collected from different localities within the same complex must be studied. | |
dc.title | METAPELITES OF THE KANSKIY GRANULITE COMPLEX (EASTERN SIBERIA): KINKED P-T PATHS AND GEODYNAMIC MODEL | |
dc.type | Статья |
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