Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8912463 | Precambrian Research | 2018 | 52 Pages |
Abstract
The spatial and temporal distribution of Mesoarchean volcanic rocks within the Lac Guyer area and their major and trace element characteristics suggest that they were emplaced into a continental rift associated with a mantle plume. The geochemical similarities between these rocks and the rift-related volcanic rocks of the younger Yasinski Group (2751-2732â¯Ma), and the presence of other Mesoarchean volcanic sequences with rift affinity indicate that the La Grande Subprovince was affected by two main plume-related rifting events during the Archean (ca. 2.88-2.81 and 2.75-2.71â¯Ga), each produced by a single or multiple magmatic plumes.
Keywords
Related Topics
Physical Sciences and Engineering
Earth and Planetary Sciences
Geochemistry and Petrology
Authors
A.-A. Sappin, C. Guilmette, J. Goutier, G. Beaudoin,