PEROVSKITE FROM SPURRITE-MERWINITE MARBLES OF THE KOCHUMDEK CONTACT AUREOLE: APPLICATION TO U-Pb DATING OF A THERMAL EVENT
The paper presents the results of the first LA-ICP-MS U-Pb geochronological studies of 60 perovskite grains from spurrite marbles of the Kochumdek contact aureole (East Siberia). Perovskite is a dominant accessory mineral of U- and Th-poor marbles, which formed at the contact with traps of the Kuz’m...
Saved in:
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
South Urals Federal Research Center of Mineralogy and Geoecology UB RAS
2022-06-01
|
| Series: | Минералогия |
| Subjects: | |
| Online Access: | https://journal.mineralogy.ru/wp-content/uploads/2022/06/2022_8_2_7.pdf |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1823859473964335104 |
|---|---|
| author | A.S. Deviatiiarova E.V. Sokol S.N. Kokh E.N. Nigmatulina |
| author_facet | A.S. Deviatiiarova E.V. Sokol S.N. Kokh E.N. Nigmatulina |
| author_sort | A.S. Deviatiiarova |
| collection | DOAJ |
| description | The paper presents the results of the first LA-ICP-MS U-Pb geochronological studies of 60 perovskite grains from spurrite marbles of the Kochumdek contact aureole (East Siberia). Perovskite is a dominant accessory mineral of U- and Th-poor marbles, which formed at the contact with traps of the Kuz’movsky complex (southwestern margin of the Tunguska Syneclise). The chemically homogeneous perovskite is characterized by limited substitutions: Ti4+ → Zr4+ (up to 2.5 mol. % CaZrO3 ) and Ca2+Ti4+ → REE3+Fe3+ (up to 1.8 mol. % REEFeO3 ). Perovskite is the main host for Th (up to 1550 ppm), U (up to 450 ppm), Ti, Zr, and LREEs (La + Ce + Pr + Nd); the element incorporation ratios are KTh = 516–870 and КU = 374. The U-Pb isotopic age of perovskite of 248.0 ± 7.2 Ma is in agreement with isotopic age values of traps of the Kuz’movsky complex. |
| format | Article |
| id | doaj-art-67b6c23896974eecbbeea2d33e38f9dd |
| institution | Kabale University |
| issn | 2313-545X 2782-2044 |
| language | English |
| publishDate | 2022-06-01 |
| publisher | South Urals Federal Research Center of Mineralogy and Geoecology UB RAS |
| record_format | Article |
| series | Минералогия |
| spelling | doaj-art-67b6c23896974eecbbeea2d33e38f9dd2025-02-11T04:13:11ZengSouth Urals Federal Research Center of Mineralogy and Geoecology UB RASМинералогия2313-545X2782-20442022-06-0182839510.35597/2313-545X-2022-8-2-7PEROVSKITE FROM SPURRITE-MERWINITE MARBLES OF THE KOCHUMDEK CONTACT AUREOLE: APPLICATION TO U-Pb DATING OF A THERMAL EVENTA.S. Deviatiiarova0E.V. Sokol1S.N. Kokh2E.N. Nigmatulina3Institute of Geology and Mineralogy SB RASInstitute of Geology and Mineralogy SB RASInstitute of Geology and Mineralogy SB RASInstitute of Geology and Mineralogy SB RASThe paper presents the results of the first LA-ICP-MS U-Pb geochronological studies of 60 perovskite grains from spurrite marbles of the Kochumdek contact aureole (East Siberia). Perovskite is a dominant accessory mineral of U- and Th-poor marbles, which formed at the contact with traps of the Kuz’movsky complex (southwestern margin of the Tunguska Syneclise). The chemically homogeneous perovskite is characterized by limited substitutions: Ti4+ → Zr4+ (up to 2.5 mol. % CaZrO3 ) and Ca2+Ti4+ → REE3+Fe3+ (up to 1.8 mol. % REEFeO3 ). Perovskite is the main host for Th (up to 1550 ppm), U (up to 450 ppm), Ti, Zr, and LREEs (La + Ce + Pr + Nd); the element incorporation ratios are KTh = 516–870 and КU = 374. The U-Pb isotopic age of perovskite of 248.0 ± 7.2 Ma is in agreement with isotopic age values of traps of the Kuz’movsky complex.https://journal.mineralogy.ru/wp-content/uploads/2022/06/2022_8_2_7.pdfaccessory mineralizationperovskiteu-pb datingcontact metamorphismmarbleskochumdek |
| spellingShingle | A.S. Deviatiiarova E.V. Sokol S.N. Kokh E.N. Nigmatulina PEROVSKITE FROM SPURRITE-MERWINITE MARBLES OF THE KOCHUMDEK CONTACT AUREOLE: APPLICATION TO U-Pb DATING OF A THERMAL EVENT Минералогия accessory mineralization perovskite u-pb dating contact metamorphism marbles kochumdek |
| title | PEROVSKITE FROM SPURRITE-MERWINITE MARBLES OF THE KOCHUMDEK CONTACT AUREOLE: APPLICATION TO U-Pb DATING OF A THERMAL EVENT |
| title_full | PEROVSKITE FROM SPURRITE-MERWINITE MARBLES OF THE KOCHUMDEK CONTACT AUREOLE: APPLICATION TO U-Pb DATING OF A THERMAL EVENT |
| title_fullStr | PEROVSKITE FROM SPURRITE-MERWINITE MARBLES OF THE KOCHUMDEK CONTACT AUREOLE: APPLICATION TO U-Pb DATING OF A THERMAL EVENT |
| title_full_unstemmed | PEROVSKITE FROM SPURRITE-MERWINITE MARBLES OF THE KOCHUMDEK CONTACT AUREOLE: APPLICATION TO U-Pb DATING OF A THERMAL EVENT |
| title_short | PEROVSKITE FROM SPURRITE-MERWINITE MARBLES OF THE KOCHUMDEK CONTACT AUREOLE: APPLICATION TO U-Pb DATING OF A THERMAL EVENT |
| title_sort | perovskite from spurrite merwinite marbles of the kochumdek contact aureole application to u pb dating of a thermal event |
| topic | accessory mineralization perovskite u-pb dating contact metamorphism marbles kochumdek |
| url | https://journal.mineralogy.ru/wp-content/uploads/2022/06/2022_8_2_7.pdf |
| work_keys_str_mv | AT asdeviatiiarova perovskitefromspurritemerwinitemarblesofthekochumdekcontactaureoleapplicationtoupbdatingofathermalevent AT evsokol perovskitefromspurritemerwinitemarblesofthekochumdekcontactaureoleapplicationtoupbdatingofathermalevent AT snkokh perovskitefromspurritemerwinitemarblesofthekochumdekcontactaureoleapplicationtoupbdatingofathermalevent AT ennigmatulina perovskitefromspurritemerwinitemarblesofthekochumdekcontactaureoleapplicationtoupbdatingofathermalevent |