MODELS FOR THE FORMATION OF POLYPHASE GABBRO-MONZODIORITE MASSIFS OF THE WESTERN SANGILEN IN THE COLLISIONAL AND TRANSTENSIONAL-SHEAR SETTINGS
A model for the formation of intrusions of the collision stage of 525–490 Ma and a model of magmatism of the transtensional shear stage of 465–440 Ma within the Mugur-Chinchilig and Erzin-Naryn blocks of Western Sangilen (Tuva) have been developed to describe the process of crust-mantle interaction....
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Russian Academy of Sciences, Siberian Branch, Institute of the Earth's crust
2023-12-01
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| Series: | Геодинамика и тектонофизика |
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| Online Access: | https://www.gt-crust.ru/jour/article/view/1755 |
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| author | A. N. Semenov O. P. Polyansky |
| author_facet | A. N. Semenov O. P. Polyansky |
| author_sort | A. N. Semenov |
| collection | DOAJ |
| description | A model for the formation of intrusions of the collision stage of 525–490 Ma and a model of magmatism of the transtensional shear stage of 465–440 Ma within the Mugur-Chinchilig and Erzin-Naryn blocks of Western Sangilen (Tuva) have been developed to describe the process of crust-mantle interaction. Model experiments confirm petrological data on the presence of multi-level chambers during the formation of the Pravotarlashkinsky and Bashkymugur massifs. The proposed model describes the migration of mantle magmas above the head of the mantle plume at the collision stage and assumes the rise of magmas along a permeable tectonic zone in the mantle lithosphere and crust at the transtensional-shear stage. The modeling results allow us to establish that material from the magma chamber can reach depths of the upper crust in the volume ratio of gabbroids to diorites from 1 : 2 to 3 : 4 and additionally introduce about 5 % of the volume fraction of lower crustal material.The physical parameters of the primary magmas (viscosity, solidus and liquidus temperatures, degree of melting depending on temperature and composition, change in density) were calculated taking into account the real geochemical characteristics of igneous rocks from the polyphase massifs of Western Sangilen. |
| format | Article |
| id | doaj-art-ec035eada2654028822965783f7f3fb5 |
| institution | Kabale University |
| issn | 2078-502X |
| language | English |
| publishDate | 2023-12-01 |
| publisher | Russian Academy of Sciences, Siberian Branch, Institute of the Earth's crust |
| record_format | Article |
| series | Геодинамика и тектонофизика |
| spelling | doaj-art-ec035eada2654028822965783f7f3fb52025-08-20T03:44:07ZengRussian Academy of Sciences, Siberian Branch, Institute of the Earth's crustГеодинамика и тектонофизика2078-502X2023-12-0114610.5800/GT-2023-14-6-0725726MODELS FOR THE FORMATION OF POLYPHASE GABBRO-MONZODIORITE MASSIFS OF THE WESTERN SANGILEN IN THE COLLISIONAL AND TRANSTENSIONAL-SHEAR SETTINGSA. N. Semenov0O. P. Polyansky1Sobolev Institute of Geology and Mineralogy, Siberian Branch of the Russian Academy of SciencesSobolev Institute of Geology and Mineralogy, Siberian Branch of the Russian Academy of SciencesA model for the formation of intrusions of the collision stage of 525–490 Ma and a model of magmatism of the transtensional shear stage of 465–440 Ma within the Mugur-Chinchilig and Erzin-Naryn blocks of Western Sangilen (Tuva) have been developed to describe the process of crust-mantle interaction. Model experiments confirm petrological data on the presence of multi-level chambers during the formation of the Pravotarlashkinsky and Bashkymugur massifs. The proposed model describes the migration of mantle magmas above the head of the mantle plume at the collision stage and assumes the rise of magmas along a permeable tectonic zone in the mantle lithosphere and crust at the transtensional-shear stage. The modeling results allow us to establish that material from the magma chamber can reach depths of the upper crust in the volume ratio of gabbroids to diorites from 1 : 2 to 3 : 4 and additionally introduce about 5 % of the volume fraction of lower crustal material.The physical parameters of the primary magmas (viscosity, solidus and liquidus temperatures, degree of melting depending on temperature and composition, change in density) were calculated taking into account the real geochemical characteristics of igneous rocks from the polyphase massifs of Western Sangilen.https://www.gt-crust.ru/jour/article/view/1755thermomechanical modelmeltingmagma chambernumerical modelingsangilengabbro-diorite intrusionthermal aureole |
| spellingShingle | A. N. Semenov O. P. Polyansky MODELS FOR THE FORMATION OF POLYPHASE GABBRO-MONZODIORITE MASSIFS OF THE WESTERN SANGILEN IN THE COLLISIONAL AND TRANSTENSIONAL-SHEAR SETTINGS Геодинамика и тектонофизика thermomechanical model melting magma chamber numerical modeling sangilen gabbro-diorite intrusion thermal aureole |
| title | MODELS FOR THE FORMATION OF POLYPHASE GABBRO-MONZODIORITE MASSIFS OF THE WESTERN SANGILEN IN THE COLLISIONAL AND TRANSTENSIONAL-SHEAR SETTINGS |
| title_full | MODELS FOR THE FORMATION OF POLYPHASE GABBRO-MONZODIORITE MASSIFS OF THE WESTERN SANGILEN IN THE COLLISIONAL AND TRANSTENSIONAL-SHEAR SETTINGS |
| title_fullStr | MODELS FOR THE FORMATION OF POLYPHASE GABBRO-MONZODIORITE MASSIFS OF THE WESTERN SANGILEN IN THE COLLISIONAL AND TRANSTENSIONAL-SHEAR SETTINGS |
| title_full_unstemmed | MODELS FOR THE FORMATION OF POLYPHASE GABBRO-MONZODIORITE MASSIFS OF THE WESTERN SANGILEN IN THE COLLISIONAL AND TRANSTENSIONAL-SHEAR SETTINGS |
| title_short | MODELS FOR THE FORMATION OF POLYPHASE GABBRO-MONZODIORITE MASSIFS OF THE WESTERN SANGILEN IN THE COLLISIONAL AND TRANSTENSIONAL-SHEAR SETTINGS |
| title_sort | models for the formation of polyphase gabbro monzodiorite massifs of the western sangilen in the collisional and transtensional shear settings |
| topic | thermomechanical model melting magma chamber numerical modeling sangilen gabbro-diorite intrusion thermal aureole |
| url | https://www.gt-crust.ru/jour/article/view/1755 |
| work_keys_str_mv | AT ansemenov modelsfortheformationofpolyphasegabbromonzodioritemassifsofthewesternsangileninthecollisionalandtranstensionalshearsettings AT oppolyansky modelsfortheformationofpolyphasegabbromonzodioritemassifsofthewesternsangileninthecollisionalandtranstensionalshearsettings |