| Title | Detrital zircon lineages of late Neoproterozoic and Cambrian strata, NW Laurentia |
| |
| Author | Lane, L S ;
Gehrels, G E |
| Source | Geological Society of America Bulletin vol. 126, no. 3-4, 2014 p. 398-414, https://doi.org/10.1130/B30848.1 |
| Image |  |
| Year | 2014 |
| Alt Series | Earth Sciences Sector, Contribution Series 20130041 |
| Publisher | Geological Society of America |
| Document | serial |
| Lang. | English |
| Media | paper; on-line; digital |
| File format | pdf |
| Province | Northwest Territories; Yukon; Nunavut |
| NTS | 75C; 75D; 75E; 75F; 75K; 75L; 75M; 75N; 76C; 76D; 76E; 76F; 76K; 76L; 76M; 76N; 77C; 77D; 77E; 77F; 77K; 77L; 77M; 77N; 78B; 78C; 85; 86; 87; 88A; 88B; 88C; 88D; 95; 96; 97; 98A; 98B; 98C; 98D; 105; 106;
107; 115; 116; 117 |
| Area | Alaska; Canada; United States of America |
| Lat/Long WENS | -148.0000 -110.0000 74.0000 60.0000 |
| Subjects | tectonics; geochronology; stratigraphy; zircon; zircon dates; tectonic interpretations; tectonic evolution; uranium lead ratios; uranium lead dates; paleogeography; provenance; Precambrian; Proterozoic;
Paleozoic; Cambrian |
| Illustrations | location maps; cross-sections; histograms; plots |
| Program | GEM:
Geo-mapping for Energy and Minerals Yukon Sedimentary Basins |
| Released | 2014 01 24 |
| Abstract | The Phanerozoic tectonic evolution of the Arctic is a field of escalating scientific interest. Detrital zircon provenance studies provide vital contributions to clarify the region's tectonic evolution.
Northwest Laurentia exposes a broad expanse of Proterozoic and Paleozoic sedimentary strata for which detrital zircon populations are poorly characterized. Moreover, the significance of sedimentary recycling is becoming better appreciated in light of
detrital zircon studies. As more data become available, our understanding of the detrital zircon character of NW Laurentia improves, providing an increasingly reliable baseline at subcontinental resolution against which potentially allochthonous
terranes, such as Arctic Alaska, can be assessed.
Sandstones of late Neoproterozoic and Cambrian age from NW Canada yield detrital zircon signatures dominated by zircon grains recycled from Proterozoic sedimentary strata. Two Neoproterozoic
sandstones from the northern Mackenzie Mountains yield zircon populations sourced from the Mackenzie Mountains Supergroup. Two Lower Cambrian sandstones sourced from the Yukon stable block and deposited in Richardson Trough have zircon populations
nearly identical to those of the upper Wernecke Supergroup, locally exposed across the southern Yukon stable block, where they are unconformably overlain by Cambrian strata. Comparisons with similar studies from NW Canada permit generalizations of
the patterns of zircon recycling. Four provenance lineages are described that characterize Laurentia-derived successions in NW Canada. |
| Summary | (Plain Language Summary, not published)
Future resource assessments of Canada's part of the Arctic Ocean basin will require a better understanding of the region¿s geological history. This paper
is a base line study. It establishes the age characteristics zircon grains contained in rock units that we know were deposited across NW Canada. This will enable future studies to compare these data to other formations around the Arctic to assess
whether they have the same, or different origins. Understanding where the similar rocks and the different rocks occur around the Arctic is one of the important data sets we need, to understand how the Arctic Ocean basin formed. |
| GEOSCAN ID | 292563 |
|
|