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Relations between the emplacement and fabric-forming conditions of the Kapitan-Dimitrievo pluton and the Maritsa shear zone (Central Bulgaria): magnetic and visible fabrics analysis |
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| Authors: | |
| Institution: | 1.Paléomagnétisme, Institut de Physique du Globe de Paris, PRES Sorbonne Paris Cité and Centre National de la Recherche Scientifique,Saint-Maur cedex,France;2.Geological Institute,Bulgarian Academy of Sciences,Sofia,Bulgaria;3.Department of Geology and Geography,Sofia University,Sofia,Bulgaria;4.National Institute of Geophysics, Geodesy and Geography,Bulgarian Academy of Sciences,Sofia,Bulgaria;5.Department of Meteorology and Geophysics, Physics Faculty,Sofia University,Sofia,Bulgaria |
| Abstract: | The Kapitan-Dimitrievo pluton was emplaced within the 15 km wide Maritsa shear zone during the Late Cretaceous. It has well-known U–Pb zircon age (78.54 ± 0.13 Ma) and appears as a late-syntectonic intrusion that marked the last ductile deformation in the Maritsa shear zone. Magnetite is believed to be the main carrier of the magnetic fabric in this pluton, and crystallized mainly late, after the main rock-forming minerals. Two fabrics are recorded, a visible syn-magmatic fabric (due to magma flow) and magnetic late-magmatic fabric (related to regional stresses). Although different, both are mainly related to the shearing along this shear zone. These results constrain in age the dextral strike-slip controlled emplacement and evolution of the Late Cretaceous plutons from Central Bulgaria. |
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