| Title | Archean unconformity in the Qalluviartuuq greenstone belt, Goudalie domain, northern Quebec |
| Download | Download (whole publication) |
| |
| Licence | Please note the adoption of the Open Government Licence - Canada
supersedes any previous licences. |
| Author | Winsky, P A; Kusky, T M; Percival, J A; Skulski, T |
| Source | Canadian Shield/Bouclier canadien; by Geological Survey of Canada; Geological Survey of Canada, Current Research no. 1995-C, 1995 p. 131-140, https://doi.org/10.4095/202912  Open Access |
| Year | 1995 |
| Publisher | Natural Resources Canada |
| Document | serial |
| Lang. | English; French |
| Media | paper; on-line; digital |
| Related | This publication is contained in Canadian Shield
|
| File format | pdf |
| Province | Quebec |
| NTS | 34O/14 |
| Area | Qalluviartuuq Lake |
| Lat/Long WENS | -75.0817 -75.0000 59.8333 59.7889 |
| Subjects | structural geology; igneous and metamorphic petrology; unconformities; Archean; structural features; lithology; conglomerates; sedimentary rocks; plutonic rocks; volcanic rocks; basalts; gabbros;
igneous rocks; tectonic interpretations; tectonic elements; deformation; metamorphism; Qalluviartuuq Greenstone Belt; Goudalie Domain; Superior Province; Minto Block; Precambrian |
| Illustrations | sketch maps; photographs |
| Released | 1995 01 01 |
| Abstract | An unconformity in the northern Qalluviartuuq greenstone belt separates basement of metasedimentary and tonalitic rocks from conglomerate and sandstone. The basal conglomerate has tonalitic clasts,
grading upward into a polymict assemblage of tonalite, basalt, andesite, granodiorite, metasedimentary and ultramafic clasts. The basalt, gabbro, and ultramafic clasts suggest that a metavolcanic terrane was being eroded in the (local) source area
for the conglomerate, and yet the conglomerate passes with apparent stratigraphic continuity upwards into mafic volcanics. Either an older greenstone sequence within the basement complex contributed detritus to the conglomerate, or a tectonic break
may be hidden in the complex structure of a fragmental mafic unit marking the contact between the conglomerate and metavolcanic units. In this second hypothesis, an overriding greenstone sheet would have shed clasts as it was thrust over synorogenic
conglomerate deposited on basement. |
| GEOSCAN ID | 202912 |
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