NUMERICAL SIMULATION OF MAGMA MINGLING (CASE OF BAYANKOL GABBRO‐GRANITE SERIES, SANGILEN, TUVA)
A new numerical model has been developed that makes it possible to describe the process of formation of a dyke of a combined composition on the basis of the dynamics of a viscous compressible fluid. The numerical thermo‐mechanical model shows the processes of magma mingling and taking into account m...
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Russian Academy of Sciences, Siberian Branch, Institute of the Earth's crust
2017-06-01
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| Series: | Геодинамика и тектонофизика |
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| Online Access: | https://www.gt-crust.ru/jour/article/view/368 |
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| author | O. P. Polyansky A. N. Semenov V. G. Vladimirov I. V. Karmysheva A. G. Vladimirov V. A. Yakovlev |
| author_facet | O. P. Polyansky A. N. Semenov V. G. Vladimirov I. V. Karmysheva A. G. Vladimirov V. A. Yakovlev |
| author_sort | O. P. Polyansky |
| collection | DOAJ |
| description | A new numerical model has been developed that makes it possible to describe the process of formation of a dyke of a combined composition on the basis of the dynamics of a viscous compressible fluid. The numerical thermo‐mechanical model shows the processes of magma mingling and taking into account multiphase interaction of melts which are different in composition and properties. The models suggest a mechanism for uplifting of high‐density mafic enclaves in a chamber/dyke filled with salic magma by gravitational floating in the enclosing gran‐ ite magma that has been cooled and lost volatile components. The performed simulation shows that the main parame‐ ter controlling the shape and size of the ascending bodies is the difference in densities. The viscosity contrast determines whether interpenetration and hybridization of magmas occur. The limiting ratio of felsic material in the mix‐ ture, which is capable of uplifting denser mafic enclaves, is estimated. The duration of melt uplifting in combined dykes is estimated with respect to the viscosity parameters. At a typical rate of 2–3 km per year, it amounts to almost 12 months. |
| format | Article |
| id | doaj-art-d9286df9957b4c46bf5f9c6f6c22e84f |
| institution | Matheson Library |
| issn | 2078-502X |
| language | English |
| publishDate | 2017-06-01 |
| publisher | Russian Academy of Sciences, Siberian Branch, Institute of the Earth's crust |
| record_format | Article |
| series | Геодинамика и тектонофизика |
| spelling | doaj-art-d9286df9957b4c46bf5f9c6f6c22e84f2025-08-04T14:27:21ZengRussian Academy of Sciences, Siberian Branch, Institute of the Earth's crustГеодинамика и тектонофизика2078-502X2017-06-018238540310.5800/GT-2017-8-2-0247242NUMERICAL SIMULATION OF MAGMA MINGLING (CASE OF BAYANKOL GABBRO‐GRANITE SERIES, SANGILEN, TUVA)O. P. Polyansky0A. N. Semenov1V. G. Vladimirov2I. V. Karmysheva3A. G. Vladimirov4V. A. Yakovlev5V.S. Sobolev Institute of Geology and Mineralogy, Siberian Branch of RAS; Novosibirsk State UniversityV.S. Sobolev Institute of Geology and Mineralogy, Siberian Branch of RAS; Novosibirsk State UniversityV.S. Sobolev Institute of Geology and Mineralogy, Siberian Branch of RAS; Novosibirsk State UniversityV.S. Sobolev Institute of Geology and Mineralogy, Siberian Branch of RAS; Novosibirsk State UniversityV.S. Sobolev Institute of Geology and Mineralogy, Siberian Branch of RAS; Novosibirsk State University; Tomsk State UniversityV.S. Sobolev Institute of Geology and Mineralogy, Siberian Branch of RAS; Novosibirsk State UniversityA new numerical model has been developed that makes it possible to describe the process of formation of a dyke of a combined composition on the basis of the dynamics of a viscous compressible fluid. The numerical thermo‐mechanical model shows the processes of magma mingling and taking into account multiphase interaction of melts which are different in composition and properties. The models suggest a mechanism for uplifting of high‐density mafic enclaves in a chamber/dyke filled with salic magma by gravitational floating in the enclosing gran‐ ite magma that has been cooled and lost volatile components. The performed simulation shows that the main parame‐ ter controlling the shape and size of the ascending bodies is the difference in densities. The viscosity contrast determines whether interpenetration and hybridization of magmas occur. The limiting ratio of felsic material in the mix‐ ture, which is capable of uplifting denser mafic enclaves, is estimated. The duration of melt uplifting in combined dykes is estimated with respect to the viscosity parameters. At a typical rate of 2–3 km per year, it amounts to almost 12 months.https://www.gt-crust.ru/jour/article/view/368magma minglingmixingconvectionmeltviscositycrystallizationnumerical modelingcombined dyke |
| spellingShingle | O. P. Polyansky A. N. Semenov V. G. Vladimirov I. V. Karmysheva A. G. Vladimirov V. A. Yakovlev NUMERICAL SIMULATION OF MAGMA MINGLING (CASE OF BAYANKOL GABBRO‐GRANITE SERIES, SANGILEN, TUVA) Геодинамика и тектонофизика magma mingling mixing convection melt viscosity crystallization numerical modeling combined dyke |
| title | NUMERICAL SIMULATION OF MAGMA MINGLING (CASE OF BAYANKOL GABBRO‐GRANITE SERIES, SANGILEN, TUVA) |
| title_full | NUMERICAL SIMULATION OF MAGMA MINGLING (CASE OF BAYANKOL GABBRO‐GRANITE SERIES, SANGILEN, TUVA) |
| title_fullStr | NUMERICAL SIMULATION OF MAGMA MINGLING (CASE OF BAYANKOL GABBRO‐GRANITE SERIES, SANGILEN, TUVA) |
| title_full_unstemmed | NUMERICAL SIMULATION OF MAGMA MINGLING (CASE OF BAYANKOL GABBRO‐GRANITE SERIES, SANGILEN, TUVA) |
| title_short | NUMERICAL SIMULATION OF MAGMA MINGLING (CASE OF BAYANKOL GABBRO‐GRANITE SERIES, SANGILEN, TUVA) |
| title_sort | numerical simulation of magma mingling case of bayankol gabbro granite series sangilen tuva |
| topic | magma mingling mixing convection melt viscosity crystallization numerical modeling combined dyke |
| url | https://www.gt-crust.ru/jour/article/view/368 |
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