Journal
SWISS JOURNAL OF GEOSCIENCES
Volume 111, Issue 1-2, Pages 79-97Publisher
SPRINGER BASEL AG
DOI: 10.1007/s00015-017-0284-1
Keywords
Permian magmatism; Regional HT metamorphism; Allanite; Zircon; Sesia-Dent Blanche nappes; Alps
Categories
Funding
- Swiss National Science Foundation [PZ00P2_161202, 200020-126946, 200020-146175]
- Swiss National Science Foundation (SNF) [200020_126946, 200020_146175, PZ00P2_161202] Funding Source: Swiss National Science Foundation (SNF)
Ask authors/readers for more resources
In the Dent Blanche Tectonic System, the Mont Morion biotite-bearing granite is a km-scale intrusion preserved in a low-strain volume. Zircon saturation thermometry suggests that it crystallised from a melt that reached about 800 A degrees C. U-Pb zircon and allanite geochronology indicates crystallization of the magma in the Permian (290 +/- 3 Ma; 280 +/- 8 Ma, respectively). Migmatitic biotite-gneiss and amphibolite are found as xenoliths within the Mont Morion granite and constitute its country-rocks. In two samples of migmatitic biotite-gneiss zircon has metamorphic overgrowths that yield U-Pb ages of 285 +/- 3 Ma and 281 +/- 4 Ma, and are thus contemporaneous with the intrusion of the granite. The Mont Morion granite with its country-rocks of migmatitic biotite-bearing gneiss and amphibolite was thus emplaced at middle crustal levels while amphibolite facies metamorphism affected its country rocks. The magmatic and metamorphic record in the Mont Morion area reflects the high-temperature regime and lithospheric thinning of the Adriatic continental margin during Permian.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available