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Cenozoic thermal evolution of the Central Rhodope Metamorphic Complex (Southern Bulgaria).
- Source :
-
International Journal of Earth Sciences . Jul2020, Vol. 109 Issue 5, p1589-1611. 23p. - Publication Year :
- 2020
-
Abstract
- We have combined new titanite, zircon, and apatite fission-track and apatite [U–Th–(Sm)]/He analyses with previously published U–Pb, Rb–Sr, and 40Ar/39Ar thermochronological data to reconstruct the Cenozoic thermal evolution of the Central Rhodope Metamorphic Complex (CRMC), exposed mainly in southern Bulgaria and to a lesser extent in northern Greece. Results reveal two phases of cooling. During the first phase, between ~ 37 and ~ 33 Ma, the CRMC experienced rapid cooling from partial melting at > 650 °C to ca 60 °C. Multiple generations of low-angle ductile-to-brittle fault zones accommodated the exhumation of the migmatitic core together with parts of its high-grade periphery. Oligocene volcanism and associated local elevation of the geothermal gradient is responsible for the resetting of some fission-track ages in the CRMC. The second cooling phase to temperatures of about 40 °C, between 24 and 13 Ma, is related to exhumation along high-angle normal faults in the southern part of the CRMC. [ABSTRACT FROM AUTHOR]
- Subjects :
- *TECTONIC exhumation
*SPHENE
*BIOLOGICAL evolution
*APATITE
*VOLCANISM
Subjects
Details
- Language :
- English
- ISSN :
- 14373254
- Volume :
- 109
- Issue :
- 5
- Database :
- Academic Search Index
- Journal :
- International Journal of Earth Sciences
- Publication Type :
- Academic Journal
- Accession number :
- 144203074
- Full Text :
- https://doi.org/10.1007/s00531-020-01862-4