Last modified:
Translation of original French
| Author: | Dion et al., 1992 |
| Age: | Neoarchean |
| Reference section: | None |
| Type area: | Northwestern portion of sheet 32G15-200-0202 and southwestern portion of sheet 32J02-200-0102 |
| Geological province: | Superior Province |
| Geological subdivision: | Abitibi Subprovince |
| Lithology: | Tonalite |
| Type: | Lithodemic |
| Rank: | Lithodeme |
| Status: | Formal |
| Use: | Active |
None
Background
This tonalitic Rush Pluton was defined by Dion et al. (1992).
Description
The tonalitic composition and layout of the Rush Pluton were interpreted from gravimetric and aeromagnetic data (Dion et al., 1992; Morin, 1994; Keating and D’Amours, 2010), as it does not outcrop.
Thickness and Distribution
The Rush Pluton layout corresponds to negative gravimetric and aeromagnetic anomalies (Dion et al., 1992; Morin, 1994; Keating and D’Amours, 2010). It has an irregular shape: its N-S axis is 4.5 km and its E-W axis is 5 km. In addition, it shows an apophysis measuring 1 x 2 km which extends to the east.
Dating
None.
Stratigraphic Relationship(s)
The Rush Pluton cuts volcanic and sedimentary rocks of the Bruneau (2724.4 ±1.2 Ma; Davis et al., 2014), Blondeau (<2721 ±3 Ma; Leclerc et al., 2012) and Bordeleau formations that characterize the summit of the Roy Group.
Paleontology
Does not apply.