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TitleThe stiff upper LIP: investigating the High Arctic Large Igneous Province
AuthorDeegan, F M; Troll, V R; Bédard, J H; Evenchick, C A; Dewing, K; Grasby, S; Geiger, H; Freda, C; Misiti, V; Mollo, S
SourceGeology Today vol. 32, no. 3, 2016 p. 92-98, https://doi.org/10.1111/gto.12138
Year2016
Alt SeriesEarth Sciences Sector, Contribution Series 20160248
PublisherJohn Wiley and Sons Ltd
Documentserial
Lang.English
Mediapaper; on-line; digital
File formatpdf
ProvinceNunavut
NTS120; 340; 560; 39; 49; 59; 69; 38; 48; 58; 68
AreaAxel Heiberg Island; Ellesmere Island; Resolute Bay; Eureka
Lat/Long WENS-104.0000 -72.0000 84.0000 74.0000
Subjectsgeochemistry; sills; dykes; intrusions; shales; limestones; sandstones; evaporites; geochemical analyses; Sverdrup Basin; Large Igneous Provinces (LIP); carbon cycles; sulfur cycles
Illustrationslocation maps; photographs; photomicrographs
ProgramWestern Arctic, High Arctic LIP, GEM2: Geo-mapping for Energy and Minerals
AbstractThe Canadian Arctic Islands expose a complex network of dykes and sills that belong to the High Arctic Large Igneous Province (HALIP), which intruded volatile-rich sedimentary rocks of the Sverdrup Basin (shale, limestone, sandstone and evaporite) some 130 to 120 million years ago. There is thus great potential in studying the HALIP to learn how volatile-rich sedimentary rocks respond to magmatic heating events during LIP emplacement. The HALIP remains, however, one of the least well known LIPs on the planet due to its remote location, short field season, and harsh climate. A Canadian-Swedish team of geologists set out in summer 2015 to further explore HALIP sills and their sedimentary host rocks, including the sampling of igneous and metasedimentary rocks for subsequent geochemical analysis, and high pressure-temperature petrological experiments to help define the actual processes and time-scales of magma-sediment interaction. The research results will advance our understanding of how climate-active volatiles such as CO2, SO2 and CH4 are mobilised during the magma-sediment interaction related to LIP events, a process which is hypothesised to have drastically affected Earth's carbon and sulphur cycles. In addition, assimilation of sulphate evaporites, for example, is anticipated to trigger sulphide immiscibility in the magma bodies and in so doing could promote the formation of Ni-PGE ore bodies. Here we document the joys and challenges of 'frontier arctic fieldwork' and discuss some of our initial observations from the High Arctic Large Igneous Province.
Summary(Plain Language Summary, not published)
The Canadian Arctic Islands expose a complex network of dykes and sills that belong to the High Arctic Large Igneous Province (HALIP), which intruded sedimentary rocks of the Sverdrup Basin (shale, limestone, sandstone and evaporite) some 130 to 120 million years ago. There is thus potential in studying the HALIP to learn how sedimentary rocks respond to magmatic heating events during LIP emplacement. The HALIP remains, however, one of the least well known LIPs on the planet due to its remote location, short field season, and harsh climate. A Canadian-Swedish team of geologists set out in summer 2015 to further explore HALIP sills and their sedimentary host rocks. The research results will advance our understanding of how climate-active volatiles such as CO2, SO2 and CH4 are mobilised during the magma-sediment interaction related to LIP events, a process which is hypothesised to have drastically affected Earth's carbon and sulphur cycles. In addition, assimilation of sulphate evaporites could promote the formation of Ni-PGE ore bodies.
GEOSCAN ID299403