Mantle amphiboles from the lithospheric keel of the Siberian Craton: Reconstructions using new thermobarometry and geochemistry
Cr-bearing amphiboles frequently occur in the subcratonic lithospheric mantle of Siberian Craton particularly in northern kimberlite fields like West Ukukit, Kuranakh, Kuoika, Kharamai, as well as in the central part of Yakutia – in Alakit and Daldyn fields and in Aldan and Chompolo fields. In the L...
Saved in:
| Main Authors: | , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2025-11-01
|
| Series: | Geosystems and Geoenvironment |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2772883825000779 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1849408411272216576 |
|---|---|
| author | I.V. Ashchepkov S.A. Babushkina S.I. Kostrovitsky O.B. Oleinikov A.V. Travin D.S. Yudin A.S. Ivanov N.S. Medvedev |
| author_facet | I.V. Ashchepkov S.A. Babushkina S.I. Kostrovitsky O.B. Oleinikov A.V. Travin D.S. Yudin A.S. Ivanov N.S. Medvedev |
| author_sort | I.V. Ashchepkov |
| collection | DOAJ |
| description | Cr-bearing amphiboles frequently occur in the subcratonic lithospheric mantle of Siberian Craton particularly in northern kimberlite fields like West Ukukit, Kuranakh, Kuoika, Kharamai, as well as in the central part of Yakutia – in Alakit and Daldyn fields and in Aldan and Chompolo fields. In the Leningrad pipe of the West Ukukit field, Cr-bearing amphiboles range from Cr-hornblendes to pargasites, edenites, katophorites, and K-richterites, showing an increase in K and Si content, as well as pressure, as determined using the updated amphibole thermobarometer. The P–T estimates for amphiboles are consistent with the results of garnet thermobarometry, supporting the division into seven horizons (interpreted as paleo-subducted slabs).Typically, the lower to middle pressure levels and the lithospheric boundary are more heated and Fe-rich, which suggests interaction between melts and peridotites within low-pressure traps for hydrous melts.K-richterites from the lithosphere–asthenosphere boundary exhibit steeply inclined and enriched trace element patterns, characterized by elevated levels of large ion lithophile elements (LILE), Sr, and Rb, along with pronounced negative anomalies in Nb and Pb. The low to middle pressure Na-rich varieties exhibit peaks in Rb, Ba, and Th, but show significantly lower rare earth element (REE) concentrations with marked depressions in the MREE range. Pargasites and hornblendes display concave REE patterns with distinct Eu anomalies, as well as peaks in Ba, U, and Sr and troughs in high field strength elements (HFSE), reflecting subduction-related signatures. Clinopyroxenes show Th, U, and Sr peaks, indicative of plume-related processes. The pargasites and hornblendes show concave REE patterns with Eu anomalies and Ba, U, Sr peaks and troughs in HFSE reflecting subduction-related signs. Clinopyroxenes reveal Th, U, Sr peaks related to plumes. Amphiboles are commonly Cl-bearing and typically associated with subduction-related processes. In the Leningrad pipe, amphibole ages range from 2.67 Ga – indicating early mantle hydration – to 1370, 500, and 370 Ma, which correspond to re-equilibration during major plume events. |
| format | Article |
| id | doaj-art-b2a61897e9564373a2865ff391e67a6d |
| institution | Kabale University |
| issn | 2772-8838 |
| language | English |
| publishDate | 2025-11-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Geosystems and Geoenvironment |
| spelling | doaj-art-b2a61897e9564373a2865ff391e67a6d2025-08-20T03:35:47ZengElsevierGeosystems and Geoenvironment2772-88382025-11-014410042710.1016/j.geogeo.2025.100427Mantle amphiboles from the lithospheric keel of the Siberian Craton: Reconstructions using new thermobarometry and geochemistryI.V. Ashchepkov0S.A. Babushkina1S.I. Kostrovitsky2O.B. Oleinikov3A.V. Travin4D.S. Yudin5A.S. Ivanov6N.S. Medvedev7V.S. Sobolev Institute of Geology and Mineralogy SB RAS, Novosibirsk 630090, Koptyuga ave. 3, Russia; Institute of Geology, SB RAS, Ulan-Ude 670042, Sachyanova Str. 6a, Russia; Corresponding author.Institute of Geology of Diamond and Precious Metals, SB, RAS, Yakutsk 677891, Lenina ave, 39, RussiaInstitute of Geochemistry SB RAS, Irkutsk 664033, Favorsky str.1A, RussiaInstitute of Geology of Diamond and Precious Metals, SB, RAS, Yakutsk 677891, Lenina ave, 39, RussiaV.S. Sobolev Institute of Geology and Mineralogy SB RAS, Novosibirsk 630090, Koptyuga ave. 3, RussiaV.S. Sobolev Institute of Geology and Mineralogy SB RAS, Novosibirsk 630090, Koptyuga ave. 3, RussiaSaint Petersburg Mining University, St. Petersburg 199106, 21st Line 2, RussiaA.V. Nikolaev Institute of Inorganic Chemistry SB RAS, Novosibirsk 630090, Lavrentieva ave 3, RussiaCr-bearing amphiboles frequently occur in the subcratonic lithospheric mantle of Siberian Craton particularly in northern kimberlite fields like West Ukukit, Kuranakh, Kuoika, Kharamai, as well as in the central part of Yakutia – in Alakit and Daldyn fields and in Aldan and Chompolo fields. In the Leningrad pipe of the West Ukukit field, Cr-bearing amphiboles range from Cr-hornblendes to pargasites, edenites, katophorites, and K-richterites, showing an increase in K and Si content, as well as pressure, as determined using the updated amphibole thermobarometer. The P–T estimates for amphiboles are consistent with the results of garnet thermobarometry, supporting the division into seven horizons (interpreted as paleo-subducted slabs).Typically, the lower to middle pressure levels and the lithospheric boundary are more heated and Fe-rich, which suggests interaction between melts and peridotites within low-pressure traps for hydrous melts.K-richterites from the lithosphere–asthenosphere boundary exhibit steeply inclined and enriched trace element patterns, characterized by elevated levels of large ion lithophile elements (LILE), Sr, and Rb, along with pronounced negative anomalies in Nb and Pb. The low to middle pressure Na-rich varieties exhibit peaks in Rb, Ba, and Th, but show significantly lower rare earth element (REE) concentrations with marked depressions in the MREE range. Pargasites and hornblendes display concave REE patterns with distinct Eu anomalies, as well as peaks in Ba, U, and Sr and troughs in high field strength elements (HFSE), reflecting subduction-related signatures. Clinopyroxenes show Th, U, and Sr peaks, indicative of plume-related processes. The pargasites and hornblendes show concave REE patterns with Eu anomalies and Ba, U, Sr peaks and troughs in HFSE reflecting subduction-related signs. Clinopyroxenes reveal Th, U, Sr peaks related to plumes. Amphiboles are commonly Cl-bearing and typically associated with subduction-related processes. In the Leningrad pipe, amphibole ages range from 2.67 Ga – indicating early mantle hydration – to 1370, 500, and 370 Ma, which correspond to re-equilibration during major plume events.http://www.sciencedirect.com/science/article/pii/S2772883825000779AmphiboleClinopyroxeneKimberliteGarnetMonomineral thermobarometryLithospheric mantle |
| spellingShingle | I.V. Ashchepkov S.A. Babushkina S.I. Kostrovitsky O.B. Oleinikov A.V. Travin D.S. Yudin A.S. Ivanov N.S. Medvedev Mantle amphiboles from the lithospheric keel of the Siberian Craton: Reconstructions using new thermobarometry and geochemistry Geosystems and Geoenvironment Amphibole Clinopyroxene Kimberlite Garnet Monomineral thermobarometry Lithospheric mantle |
| title | Mantle amphiboles from the lithospheric keel of the Siberian Craton: Reconstructions using new thermobarometry and geochemistry |
| title_full | Mantle amphiboles from the lithospheric keel of the Siberian Craton: Reconstructions using new thermobarometry and geochemistry |
| title_fullStr | Mantle amphiboles from the lithospheric keel of the Siberian Craton: Reconstructions using new thermobarometry and geochemistry |
| title_full_unstemmed | Mantle amphiboles from the lithospheric keel of the Siberian Craton: Reconstructions using new thermobarometry and geochemistry |
| title_short | Mantle amphiboles from the lithospheric keel of the Siberian Craton: Reconstructions using new thermobarometry and geochemistry |
| title_sort | mantle amphiboles from the lithospheric keel of the siberian craton reconstructions using new thermobarometry and geochemistry |
| topic | Amphibole Clinopyroxene Kimberlite Garnet Monomineral thermobarometry Lithospheric mantle |
| url | http://www.sciencedirect.com/science/article/pii/S2772883825000779 |
| work_keys_str_mv | AT ivashchepkov mantleamphibolesfromthelithospherickeelofthesiberiancratonreconstructionsusingnewthermobarometryandgeochemistry AT sababushkina mantleamphibolesfromthelithospherickeelofthesiberiancratonreconstructionsusingnewthermobarometryandgeochemistry AT sikostrovitsky mantleamphibolesfromthelithospherickeelofthesiberiancratonreconstructionsusingnewthermobarometryandgeochemistry AT oboleinikov mantleamphibolesfromthelithospherickeelofthesiberiancratonreconstructionsusingnewthermobarometryandgeochemistry AT avtravin mantleamphibolesfromthelithospherickeelofthesiberiancratonreconstructionsusingnewthermobarometryandgeochemistry AT dsyudin mantleamphibolesfromthelithospherickeelofthesiberiancratonreconstructionsusingnewthermobarometryandgeochemistry AT asivanov mantleamphibolesfromthelithospherickeelofthesiberiancratonreconstructionsusingnewthermobarometryandgeochemistry AT nsmedvedev mantleamphibolesfromthelithospherickeelofthesiberiancratonreconstructionsusingnewthermobarometryandgeochemistry |