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TitleGeological evolution and hydrocarbon potential of the salt-cored Hoodoo Dome, Sverdrup Basin, Arctic Canada
AuthorDewing, KORCID logo; Springer, A; Guest, B; Hadlari, TORCID logo
SourceMarine and Petroleum Geology vol. 71, 2016 p. 134-148,
Alt SeriesEarth Sciences Sector, Contribution Series 20160012
PublisherElsevier BV
Mediapaper; on-line; digital
File formatpdf
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AreaArctic Ocean; Canadian Arctic Islands; Ellef Ringnes Island; Jackson Bay; Cape Allison; Cape Macmillan; King Christian Island; Amund Ringnes Island; Lougheed Island; Mackenzie King Island; Cornwall Island; Devon Island; Grinnell Peninsula; Bathurst Island; Melville Island; Sabine Peninsula; Cameron Island; Île Vanier
Lat/Long WENS-114.0000 -94.0000 79.5000 75.7500
Subjectsfossil fuels; structural geology; sedimentology; stratigraphy; geophysics; geochronology; Paleogene; Eocene; Neogene; Archean; petroleum resources; hydrocarbons; hydrocarbon potential; gas; oil; structural features; domes; salt domes; traps; diapirs; anticlines; faults; sedimentary rocks; evaporites; sandstones; mudstones; siltstones; limestones; sedimentary basins; geological history; basin evolution; burial history; source rocks; hydrocarbon migration; reservoir rocks; geophysical interpretations; seismic interpretations; thermal maturation; detrital minerals; apatite; uranium thorium dates; modelling; igneous rocks; drillholes; stratigraphic analyses; structural analyses; petroleum exploration; exploration activities; Sverdrup Basin; Hoodoo Dome; Deer Bay Formation; Isachsen Formation; Walker Island Member; Rondon Member; Paterson Island Member; Christopher Formation; Macdougal Point Member; Invincible Point Member; Hassel Formation; Kanguk Formation; Eureka Sound Formation; Eurekan Formation; Mcconnell Island Formation; Jameson Bay Formation; Natural gas; Phanerozoic; Cenozoic; Tertiary; Mesozoic; Cretaceous; Jurassic; Triassic; Paleozoic; Permian; Carboniferous; Devonian; Silurian; Ordovician; Cambrian; Precambrian; Proterozoic
Illustrationslocation maps; geological sketch maps; stratigraphic columns; cross-sections, stratigraphic; cross-sections; tables; profiles; bar graphs; graphs
ProgramGEM2: Geo-mapping for Energy and Minerals Western Arctic Sverdrup Basin
ProgramPolar Continental Shelf Project
AbstractThe evaporite-cored Hoodoo Dome on southern Ellef Ringnes Island, Sverdrup Basin, was examined to improve the understanding of its structural geological history in relation to hydrocarbon migration. Data from geological mapping, reflection seismic, thermal maturity and detrital apatite (U-Th)/He cooling ages are presented. Five stages of diapirism at Hoodoo Dome are interpreted from Jurassic to Recent times: 1. 180 to 163 Ma (pre-Deer Bay Formation; circular diapir). 2. 163 to 133 Ma (Deer Bay to lower Isachsen formations; circular diapir and salt wings). 3. 115 to 94 Ma (Christopher and Hassel formations; oval diapir) 4. 79 Ma (Kanguk Formation; reactivation of central diapir ). 5. 42Ma to 65Ma (Eurekan Orogeny; tightening of the anticline) During phases 1 and 2, Hoodoo diapir was circular and salt wings formed along its margin. During phase 3, Hoodoo Dome evolved into a much larger, elongate, doubly plunging anticline. Phase 4 is inferred from thermochronology data and is characterized by a cluster of cooling ages, but the extent of motion during that time is unknown. Phase 5 tightened the anticline creating approximately 700 m of structural relief. Denudation since the end of the Eurekan Orogeny is estimated at 600 m. A one dimensional burial history model predicts hydrocarbon generation from Middle and Late Triassic source rocks between 140 and 66 Ma, with majority of hydrocarbon expulsion between 117 and 79 Ma. Hydrocarbon generation post-dates salt wing formation. This trap type could host natural gas expelled from Triassic source rocks.
Summary(Plain Language Summary, not published)
This paper describes the geological history of a large geological dome. The paper then compares the timing of the dome's formation with the timing of oil and gas migration. Some parts of the dome were available to trap oil or gas when the hydrocarbons migrated, but the main event that created the large structural trap happened after oil and gas migrated. This may explain why so many of the oil and gas discoveries in the area were much smaller than industry expected.

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