APATITE FISSION-TRACK AGES FROM THE KARELIAN CRATON: FIRST RESULTS
- Авторлар: Bagdasaryan T.E.1, Veselovskiy R.V.1, Stepanova A.V.1, Bychkov A.Y.1
-
Мекемелер:
- SCHMIDT INSTITUTE OF PHYSICS OF THE EARTH OF THE RUSSIAN ACADEMY OF SCIENCES
- Бөлім: MINERALOGY
- ##submission.dateSubmitted##: 06.03.2025
- ##submission.dateAccepted##: 24.03.2025
- ##submission.datePublished##: 11.06.2025
- URL: https://bakhtiniada.ru/2686-7397/article/view/282672
- ID: 282672
Дәйексөз келтіру
Толық мәтін
Аннотация
The first apatite fission-track ages from surface samples of geological objects within the Karelian craton – the Kivakka massif (apatite fission-track age 901±95 Ma (±2σ)), the Pirttiguba dyke (957±87 and 1024.3±90.9 Ma) and the Ropruchey sill (990±101 Ma) – have been obtained using Laser Ablation Inductively Coupled Plasma Mass Spectrometry (LA-ICP-MS). Obtained results indicate the absence of regional thermal events above 120°C within the Karelian craton during the last billion years, in agreement with low-temperature data from conjugate sites in Finland. Thermal evolution models of the studied objects, constructed from the results of the calculation of spontaneous fission track lengths of 238U, are similar and indicate a monotonic cooling of the rocks of the Karelian craton’s present-day surface throughout the Phanerozoic at a rate of 0.12-0.31°C/Myr, which corresponds to a denudation rate of 6-16 m/Myr at a geothermal gradient value of 20°C/km.
Толық мәтін
Авторлар туралы
Tatyana Bagdasaryan
SCHMIDT INSTITUTE OF PHYSICS OF THE EARTH OF THE RUSSIAN ACADEMY OF SCIENCES
Хат алмасуға жауапты Автор.
Email: tanya.bagdasaryan@yandex.ru
ORCID iD: 0000-0002-0265-8047
Candidate of Geological and Mineralogical Sciences, Researcher
РесейRoman Veselovskiy
Email: roman.veselovskiy@ya.ru
Aleksandra Stepanova
Email: sa07sa@mail.ru
Andrey Bychkov
Email: andrewbychkov@rambler.ru
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