ISSN:
1365-3121
Source:
Blackwell Publishing Journal Backfiles 1879-2005
Topics:
Geosciences
Notes:
Magmatism in the central part of the Variscan orogenic belt in Europe has occurred in several distinct episodes. Each episode spanned a few million years and was characterized by a distinct geochemical signature and geodynamic setting: (i) between 340 and 330 Ma (Visean), high-K diorites and granitoids within a zone extending parallel the orogen axis, possibly tracing a palaeosuture; (ii) at 310–307 Ma (Westphalian), calc-alkaline granitoids in the Intra-Alpine domain; (iii) at 304–295 Ma (Stephanian), subalkaline granitoids in Intra-Alpine and Pennine domains; and finally (iv) at 280–270 Ma (Permian) granitoids in Pennine, Austroalpine and South-Alpine domains. The generation and emplacement of granitoid melts in the Variscan crust are suggested to be short-term pulses that are controlled by extensional processes in the lithosphere such as thermal erosion and relaxation of the lithospheric mantle, and decompressional melting.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1111/j.1365-3121.1997.tb00021.x
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