Early Paleozoic UHT/LP Metamorphism in the Sangilen Block of the Tuvino-Mongolian Massif
| Autor: | P. Ya. Azimov, I. K. Kozakov, V. A. Glebovitsky |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
geography
geography.geographical_feature_category Paleozoic 020209 energy Geochemistry Metamorphism 02 engineering and technology Massif 010502 geochemistry & geophysics 01 natural sciences Mantle (geology) Tectonics Magmatism 0202 electrical engineering electronic engineering information engineering Earth and Planetary Sciences (miscellaneous) General Earth and Planetary Sciences Heat flow Geology 0105 earth and related environmental sciences |
| Zdroj: | Doklady Earth Sciences. 479:295-299 |
| ISSN: | 1531-8354 1028-334X |
| DOI: | 10.1134/s1028334x18030145 |
| Popis: | 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). |
| Databáze: | OpenAIRE |
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