The Middle-upper Devonian clastic wedge of the Franklinian geosyncline

Simple item page
dc.contributor.advisorKlovan, J. Edward
dc.contributor.authorEmbry, Ashton F. (Ashton Fox)
dc.coverage.spatial200000558en
dc.date.accessioned2005-07-19T20:15:21Z
dc.date.available2005-07-19T20:15:21Z
dc.date.issued1976
dc.descriptionBibliography: p. 259-274.en
dc.description.abstractMiddle - Upper Devonian elastic strata in the Canadian Arctic Islands are present over an area of about 200,000 sq km (75,000 sq miles) and are up to 5000 m (16,000 1) thick. The strata comprise a elastic wedge which was deposited in the Franklinian geosyncline prior to Late Devonian - Early Mississippian deformation. The elastic wedge is divided into eleven formations, and six facies are recognized within the strata. The formations and their facies content are: Blackley (submarine fan); Cape de Bray (marine slope); Weatherall (deltaic-marine shelf); Bird Fiord (open marine shelf and deltaic-marine shelf); Strathcona Fiord (meandering stream); Hecla Bay (braided stream); Fram (meandering stream); Hell Gate {braided stream); Nordstrand Point (meandering stream); Beverley Inlet (meandering stream); and Parry Islands (braided stream, meandering stream and deltaic-marine shelf). Mineralogy, facies distributions, paleocurrent patterns and regional geology all indicate that the source areas of the elastic strata lay to the north and east, and included the Caledonian and Pearya Mountain systems and Precambrian Shield of Greenland. Chert and rock fragments characterize detritus from the Pearya Mountains whereas detritus from the Caledonian Mountains and Precambrian Shield is characterized by a high percentage of monocrystalline quartz. Compositional variations within the elastic wedge indicate that the Pearya Mountains progressively supplied a higher proportion of the detritus throughout wedge development. Paleolatitude estimations, lithologies, fossils and clay minerailogy imply that the elastic wedge was deposited under humid tropical climatic conditions. Lithologic variations in fluvial strata suggest that the climate fluctuated between savanna and very humid. Clastic deposition commenced in the extreme northeast in Eifelian time, and a coastal plain prograded south and west until it covered almost the entire Arctic Islands area by Middle Frasnian. During progradation, submarine fan and marine slope deposits infilled deep basins in the northwest. In Late Frasnian the entire area was uplifted and subjected to erosion. The area was transgressed in latest Frasnian, and a marine shelf was widespread by Early Famennian. In latest Devonian or Early Mississippian the elastic wedge was uplifted and folded to form a "foothills" belt encircling the southwestern termination of the Pearya Mountains. Sandstone units of delta front, beach and distributary channel origin within the Weatherall and Bird Fiord Fms are rated as having the highest potential for petroleum accumulations. The strata may have uranium potential but the meager data, presently available in this regard, are not encouraging.
dc.description.notesThis title is not available online. Access options are: - consulting the copy from Archives in our reading room in person - https://asc.ucalgary.ca/visiting/ - borrowing a circulating copy from the Library catalogue – https://ucalgary.primo.exlibrisgroup.com/discovery/search?vid=01UCALG_INST:UCALGARY&lang=en
dc.format.extentxxv, 282 leaves : ill. ; 30 cm.en
dc.identifier82480957en
dc.identifier.citationEmbry, A. F. (1976). The Middle-upper Devonian clastic wedge of the Franklinian geosyncline (Doctoral thesis, University of Calgary, Calgary, Canada). Retrieved from https://prism.ucalgary.ca. doi:10.11575/PRISM/12466en_US
dc.identifier.doihttp://dx.doi.org/10.11575/PRISM/12466
dc.identifier.lccQE 665 E433 1976 Microficheen
dc.identifier.other82480957en
dc.identifier.urihttp://hdl.handle.net/1880/13662
dc.language.isoeng
dc.publisher.institutionUniversity of Calgaryen
dc.publisher.placeCalgaryen
dc.relationAdditional Copy: QE 665 E433 1976G GEOLOGYen
dc.rightsUniversity of Calgary graduate students retain copyright ownership and moral rights for their thesis. You may use this material in any way that is permitted by the Copyright Act or through licensing that has been assigned to the document. For uses that are not allowable under copyright legislation or licensing, you are required to seek permission.
dc.subject.lccQE 665 E433 1976 Microficheen
dc.subject.lcshGeology, Stratigraphic - Devonian
dc.subject.lcshGeology - Northwest Territories
dc.titleThe Middle-upper Devonian clastic wedge of the Franklinian geosyncline
dc.typedoctoral thesis
thesis.degree.disciplineGeology
thesis.degree.grantorUniversity of Calgary
thesis.degree.nameDoctor of Philosophy (PhD)
ucalgary.thesis.accessionTheses Collection 58.002:Box 257 82480957
ucalgary.thesis.additionalcopyQE 665 E433 1976G GEOLOGYen
ucalgary.thesis.notesPLen
ucalgary.thesis.uarcreleasenoen
Files
Collections
Restricted Theses and Dissertations