About This Item

Share This Item

The AAPG/Datapages Combined Publications Database

CSPG Special Publications

Abstract


Pangea: Global Environments and Resources — Memoir 17, 1994
Pages 199-217
Regional Paleogeography and Tectonics

Late Paleozoic Syn- and Post-Rift Sequences on Grinnell Peninsula, Canadian Arctic (Sverdrup Basin): Evidence for Basin Margin Tectonic Disturbances Associated with Sequence Boundaries

Benoit Beauchamp, Pierre Theriault

Abstract

The Carboniferous and Permian succession of Grinnell Peninsula, NW Devon Island, Canadian Arctic comprises seven formations that are parts of five unconformity-bounded low-order sequences. The Visean sequence comprises lacustrine oil shale, sandstone, conglomerate and carbonate (Emma Fiord Formation) deposited during an early rift phase, when extensional structures of the Sverdrup Basin were just starting to form. The Bashkirian(?) sequence comprises red-weathering alluvial fan and braided river syn-rift conglomerates and sandstones (Lower clastic member of Canyon Fiord Formation) that were deposited in a series of E-W oriented half-grabens. The Gzhelian-Sakmarian sequence is composed of nearshore sandstones (Upper clastic member of Canyon Fiord Formation) and correlative shallow subtidal carbonates (Belcher Channel Formation) arranged in a series of high-order cycles that onlapped the Lower clastic member from east to west. The Artinskian sequence comprises sandstones and mixed clastic-carbonates (Raanes Formation) that transgressed Grinnell Peninsula from north to south, overlain by regressive, cool water temperate carbonates (Great Bear Cape Formation). The Roadian (Ufimian)-Wordian (Kazanian) sequence is composed of unconsolidated shallow marine, transgressive sand (Assistance Formation) overlain by glauconitic, regressive sand (Trold Fiord Formation).

When compared with other marginal areas of the Sverdrup Basin, the Grinnell Peninsula succession provides evidence that recurring basin margin tectonic disturbances (uplifts, tilts, etc) led to the formation of low-order, sequence-bounding unconformities. This process occurred independently of whether the basin was in its syn- or post-rift phase.


Pay-Per-View Purchase Options

The article is available through a document delivery service. Explain these Purchase Options.

Watermarked PDF Document: $14
Open PDF Document: $24