... (Schefferville zone), the Nimish Formation includes a polymictic conglomerate containing quartz syenite cobbles that crystallized at 1877.8 ± 1.3 Ma. These cobbles are petrographically and geochemically linked to the Nimish volcanics, which are intercalated with the Sokoman iron formation. Consequently...

.... , Parrish , R.R. , Birkett , T.C. , and Watanabe , D.H. , 1995 , U-Pb ages from the Nimish Formation and Montagnais glomeroporphyritic gabbro of the central New Quebec orogen, Canada : Canadian Journal of Earth Sciences , v. v. 32 pp. 1208 ߝ 1220 . Gaina , C. , and Müller , R.D...

...Andrey Bekker; John F. Slack; Noah Planavsky; Bryan Krapež; Axel Hofmann; Kurt O. Konhauser; Olivier J. Rouxel Abstract Iron formations are economically important sedimentary rocks that are most common in Precambrian sedimentary successions. Although many aspects of their origin remain unresolved...

... Rubble, clay Unconformity Diabase Intrusive Contact Menihek 300+ Shale, slate Sokoman 90 – 200+ Iron-formation Nimish 0 – 90 Greenstones Local (?) Unconformity Proterozoic Kaniapiskau Knob Lake Wishart 20 – 60 Quartzite Local...

...Cornelis Klein Abstract Banded iron-formations (BIFs) occur in the Precambrian geologic record over a wide time span. Beginning at 3.8 Ga (Isua, West Greenland), they are part of Archean cratons and range in age from about 3.5 until 2.5 Ga. Their overall volume reaches a maximum at about 2.5 Ga...

... Sandstone is retained for the c . 700 m thick dominantly quartzarenite succession above the unconformity, which remains the lowermost formation of the Kimberley Group ( Fig. 2 ). The King Leopold Sandstone is overlain by tholeiitic basalts of the Carson Volcanics (270–700 m; Gellatly et al . 1975...

... interval along the western portion of the belt and are hosted by early Proterozoic metasedimentary and metavolcanic rocks, the largest bodies being confined to the metasedimentary sequence (Ospwagan Group; Fig. 1 ). The majority of the ultramafic bodies have been emplaced into either the Pipe Formation...

.... Table 3. Formations within the Labrador Trough Domain Formation Rock types Kaniapiscau Supergroup Menihek Mostly grey psammite and wacke Sokoman Banded iron formation Nimish Alkalic basalt and mafic pyroclastic rocks Baby-Howse zone Baby Mudrock, meta-siltstone, wacke...

... is shown in Figs.  1 and 2 and regional relationships are available from the maps of Moorhead ( 1988 ). The major divisions illustrated in the figures are Paleoproterozoic formations of the easterly-trending Cape Smith Belt and underlying Archean granitoid basement. Along this part of the Cape Smith...