Scientific article
English

Magma pulses in the Central Variscan Belt: episodic melt generation and emplacement during lithospheric thinning

ContributorsSchaltegger, Ursorcid
Published inTerra nova, vol. 9, no. 5-6, p. 242-245
Publication date1997
Abstract

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.

Affiliation entities Not a UNIGE publication
Citation (ISO format)
SCHALTEGGER, Urs. Magma pulses in the Central Variscan Belt: episodic melt generation and emplacement during lithospheric thinning. In: Terra nova, 1997, vol. 9, n° 5-6, p. 242–245. doi: 10.1111/j.1365-3121.1997.tb00021.x
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Article (Published version)
accessLevelRestricted
Identifiers
Journal ISSN0954-4879
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