Early Paleozoic UHT/LP Metamorphism in the Sangilen Block of the Tuvino-Mongolian Massif
- Авторы: Azimov P.Y.1, Kozakov I.K.1, Glebovitsky V.A.1,2
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Учреждения:
- Institute of Precambrian Geology and Geochronology
- St. Petersburg State University
- Выпуск: Том 479, № 1 (2018)
- Страницы: 295-299
- Раздел: Geology
- URL: https://ogarev-online.ru/1028-334X/article/view/192392
- DOI: https://doi.org/10.1134/S1028334X18030145
- ID: 192392
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Аннотация
The P–T conditions of Early Paleozoic metamorphism in the Sangilen block of the Tuvino-Mongolian Massif (southeastern part of the Central Asian Mobile Belt) achieved a value of 910–950°C and 3–4 kbar, which corresponded to the conditions of ultrahigh temperature–low pressure (UHT/LP) metamorphism. During retrograde metamorphism, cooling down to 850°C was accompanied by compression (up to 5.5–7 kbar), and then cooling down to 580–650°C took place at nearly the same pressure (5.5–6.5 kbar). UHT metamorphism was related to the elevated heat flow from the mantle, leading also to an intensive basite magmatism. The “counter-clockwise” P–T evolution was evoked by underthrusting of the hot tectonic slab (Erzin complex) beneath the colder one (Moren complex).
Об авторах
P. Azimov
Institute of Precambrian Geology and Geochronology
Автор, ответственный за переписку.
Email: pavel.azimov@mail.ru
Россия, St. Petersburg
I. Kozakov
Institute of Precambrian Geology and Geochronology
Email: pavel.azimov@mail.ru
Россия, St. Petersburg
V. Glebovitsky
Institute of Precambrian Geology and Geochronology; St. Petersburg State University
Email: pavel.azimov@mail.ru
Россия, St. Petersburg; St. Petersburg
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