TY - JOUR

T1 - Formation Conditions of the Postcollisional Granites of the Kara Orogen (Northern Taimyr, Central Arctic): Application of 3D Numerical Modeling

AU - Vernikovsky, V. A.

AU - Semenov, A. N.

AU - Polyansky, O. P.

AU - Babichev, A. V.

AU - Vernikovskaya, A. E.

AU - Matushkin, N. Yu.

N1 - This work was financially supported by the Russian Science Foundation (grant no. 24-17-00057).

PY - 2024/12

Y1 - 2024/12

N2 - Using 3D numerical modeling, we analyze the formation of postcollisional granitoids of the Kara orogen in Northern Taimyr under conditions of elevated heat flow due to the orogen's breakup prior to its mantle plume episode (280-250 Ma). The initial geometry of the model area, the boundary conditions and physical properties for the crust and the mantle have been selected to reflect the structure of the crust in the junction zone of the Kara, Central Taimyr, and Siberian blocks. Comparing 2D and 3D modeling results with identical parameters and physical properties defined by the Rayleigh number shows that 3D modeling yields a more realistic and correct description of relevant magmatic processes. At the base of the modeled Earth crust an area of melting at a depth of similar to 46-50 km appears, possibly with slight input of mantle component, which induces magma uplift and the formation of closely spaced granitoid intrusions. Plutons with diameters 10-20 km were emplaced at depths 14-8 km during 15 million years, which is close to the actual geological position and timing of postcollisional stocks of the Kara orogen.

AB - Using 3D numerical modeling, we analyze the formation of postcollisional granitoids of the Kara orogen in Northern Taimyr under conditions of elevated heat flow due to the orogen's breakup prior to its mantle plume episode (280-250 Ma). The initial geometry of the model area, the boundary conditions and physical properties for the crust and the mantle have been selected to reflect the structure of the crust in the junction zone of the Kara, Central Taimyr, and Siberian blocks. Comparing 2D and 3D modeling results with identical parameters and physical properties defined by the Rayleigh number shows that 3D modeling yields a more realistic and correct description of relevant magmatic processes. At the base of the modeled Earth crust an area of melting at a depth of similar to 46-50 km appears, possibly with slight input of mantle component, which induces magma uplift and the formation of closely spaced granitoid intrusions. Plutons with diameters 10-20 km were emplaced at depths 14-8 km during 15 million years, which is close to the actual geological position and timing of postcollisional stocks of the Kara orogen.

KW - 3D numerical modeling

KW - Arctic

KW - Kara orogen

KW - Northern Taimyr

KW - Siberian craton

KW - collision

KW - heat flow, granite

KW - mantle plume

KW - АРКТИКА

KW - КАРСКИЙ ОРОГЕН

KW - СЕВЕРНЫЙ ТАЙМЫР

KW - СИБИРСКИЙ КРАТОН

KW - КОЛЛИЗИЯ

KW - ПЛЮМ

KW - ГРАНИТЫ

KW - ТЕРМАЛЬНАЯ МОДЕЛЬ

KW - 3Э-МОДЕЛИРОВАНИЕ

UR - https://www.scopus.com/record/display.uri?eid=2-s2.0-85209761893&origin=inward&txGid=3b6e815126a8b4290edb8db38cc9443f

UR - https://www.webofscience.com/wos/woscc/full-record/WOS:001360867800001

UR - https://www.elibrary.ru/item.asp?id=79036554

UR - https://www.elibrary.ru/item.asp?id=82112241

UR - https://www.mendeley.com/catalogue/674e09b8-5af6-30e4-9d81-820e06a8e0bd/

U2 - 10.1134/S1028334X24604565

DO - 10.1134/S1028334X24604565

M3 - Article

VL - 519

SP - 2149

EP - 2155

JO - Doklady Earth Sciences

JF - Doklady Earth Sciences

SN - 1028-334X

IS - 2

M1 - 21

ER -