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TitleFault-mediated melt ascent in a Neoproterozoic continental flood basalt province, the Franklin sills, Victoria Island, Canada
AuthorBédard, J H; Naslund, H R; Nabelek, P; Winpenny, A; Hryciuk, M; Macdonald, W; Hayes, B; Steigerwaldt, K; Hadlari, TORCID logo; Rainbird, RORCID logo; Dewing, KORCID logo; Girard, E
SourceGeological Society of America Bulletin vol. 124, no. 5-6, 2012 p. 723-736,
Alt SeriesEarth Sciences Sector, Contribution Series 20110030
PublisherGeological Society of America
Mediapaper; on-line; digital
File formatpdf
NTS77G/10; 77G/11; 77G/12; 77G/13; 77G/14; 77G/15; 77G/16; 78B; 87E/12; 87E/13; 87E/14; 87E/15; 87F/09; 87F/10; 87F/15; 87F/16; 87G; 87H; 88A/01; 88A/02; 88A/03; 88A/04; 88A/06; 88A/07; 88A/08; 88A/09
AreaVictoria Island
Lat/Long WENS-119.0000 -108.0000 73.2500 70.5000
Subjectsigneous and metamorphic petrology; igneous rocks; plutonic rocks; basalts; sills; intrusive rocks; nickel; sulphides; sulphide deposits; emplacement; Franklin sills; Uhuk Massif; Horst Block; Proterozoic; Precambrian
Illustrationslocation maps; cross-sections; photographs
ProgramGEM: Geo-mapping for Energy and Minerals, PGE/Base Metals - Victoria Island (NWT and Nunavut)
Released2012 02 06
AbstractThe Neoproterozoic Franklin large igneous province on Victoria Island, Canada, is characterized by continental flood basalts and a sill-dominated feeder system. Field relationships indicate that fault-guided transfer zones allowed magma to jump up-section to form higher-level intrusions. Where sills connect to dikes and magmas moved up-section, roof and wall rocks are characterized by wide and intense contact-metamorphic haloes, consistent with throughflow of magma. The geometric constraints suggest that conduits may have opened episodically and then closed when magma pressure waned. The episodic nature of conduit opening events can explain the pulsed ascent of crystal slurries, and may also play a role in the deposition of Ni-sulfides.

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