10.6084/m9.figshare.3454709.v1
Pedro Oyhantçabal
Pedro
Oyhantçabal
Siegfried Siegesmund
Siegfried
Siegesmund
Klaus Wemmer
Klaus
Wemmer
Sergey Presnyakov
Sergey
Presnyakov
Paul Layer
Paul
Layer
Geochronological constraints on the evolution of the southern Dom Feliciano Belt (Uruguay)
Geological Society of London
2016
550 Ma
peak metamorphism
Maldonado granite
770 Ma
573 Ma
Punta del Este Terrane
Punta del Este
Kaoko belts
magmatic episode
ion microprobe
Kaoko Belt
Las Ventanas Formation
granite emplacement
foreland basins
Coastal Terrane
Geochronological constraints
Granitoid emplacement
Dom Feliciano
Volcaniclastic rocks
Dom Feliciano Belt
Geology
2016-06-21 12:18:23
Dataset
https://geolsoc.figshare.com/articles/dataset/Geochronological_constraints_on_the_evolution_of_the_southern_Dom_Feliciano_Belt_Uruguay_/3454709
<p>New U–Pb sensitive high-resolution ion microprobe, K–Ar and Ar–Ar data from the southernmost Dom Feliciano Belt allow the
identification of four major events. Orthogneisses from the Punta del Este Terrane indicate a magmatic episode at <em>c</em>. 770 Ma and high-grade metamorphism at 641 ± 17 Ma. Granitoid emplacement at 627 ± 23 Ma was roughly coeval with peak metamorphism.
Volcaniclastic rocks of the Las Ventanas Formation dated at 573 ± 11 Ma can be correlated with the peripheral foreland basin
(571 ± 8 Ma). Transpression and coeval high-K calc-alkaline magmatism is recorded in the Maldonado granite dated at 564 ±
7 Ma. The following events are postulated: (1) magmatism at 850–750 Ma related to rifting; (2) metamorphism and granite emplacement
at 650–600 Ma; (3) molasse sequences and foreland basins at <em>c</em>. 573 Ma; (4) late magmatism at 580–560 Ma associated with transpression. The data indicate that (1) the Punta del Este Terrane
could be a portion of the Coastal Terrane of the Kaoko Belt, (2) granitoid emplacement at 650–600 Ma in the Punta del Este
and Nico Pérez terranes favours westward subduction, and (3) widespread post-collisional synkinematic magmatism occurred in
the Dom Feliciano and Kaoko belts between 580 and 550 Ma.
</p>