Magmatic Underplating, Extension, and Crustal Reequilibration: Insights From A Cross‐Section Through the Ivrea Zone and Strona‐Ceneri Zone, Northern Italy

The thermal impact of magmatic underplating at various crustal levels is studied along a traverse through the Ivrea‐Verbano Zone and Strona‐Ceneri Zone in northern Italy. Geochronological and petrologic data are compared to a two‐dimensional thermal‐kinematic model. Field data and numerical simulati...

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Bibliographic Details
Published in:	The Journal of geology Vol. 105; no. 3; pp. 367 - 378
Main Authors:	Henk, Andreas, Franz, Leander, Teufel, Stefan, Oncken, Onno
Format:	Journal Article
Language:	English
Published:	The University of Chicago Press 01-05-1997
Subjects:	Cooling Garnets Gasoline Geology Igneous petrology Metamorphic petrology Metamorphism Minerals Monazites Rocks
Online Access:	Get full text
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Summary:	The thermal impact of magmatic underplating at various crustal levels is studied along a traverse through the Ivrea‐Verbano Zone and Strona‐Ceneri Zone in northern Italy. Geochronological and petrologic data are compared to a two‐dimensional thermal‐kinematic model. Field data and numerical simulation show the strong disturbance of the temperature field in the lower and intermediate crust in relation to magmatic underplating leading to granulite‐ to amphibolite‐facies metamorphism as well as reequilibration of mineral chemical and isotopic systems. Magmatic underplating leaves a crust with an apparently heterogeneous tectonometamorphic evolution, as information on the earlier history is preserved only at upper crustal levels.
ISSN:	0022-1376 1537-5269
DOI:	10.1086/515932