... of development. Comparisons with other nearly contemporary mafic suites in central and southern Labrador show that only the Mealy dykes have a distinctly more radiogenic isotopic signature. Paradoxically, other mafic suites that intrude older basement rocks north of the Grenville Front have less enriched Nd...

...Sylvain Lacroix; Richard Darling Abstract The atypical Cu-Ni mineralization in the central part of the Labrador trough is related to gabbro sills but is also slightly enriched in Au-(Co-Zn) and associated with intensely altered rocks along a thrust fault. Thus, it has features which suggest both...

...R. D. Dallmeyer Abstract Penetratively cleaved slate–phyllite within supracrustal sequences (Seal Lake and Letitia Lake groups) in northernmost portions of the Grenville parauthochthon in central Labrador record 1018 ± 15 and 985 ± 14 Ma whole-rock 40 Ar/ 39 Ar plateau ages, which are interpreted...

...J. D. Hill; A. Thomas Abstract Recent mapping in central Labrador has resulted in the recognition and correlation of two Neohelikian peralkaline silicic igneous centres. The Flowers River igneous suite is circular in shape, covers an area of approximately 1720 km 2 , and consists of undeformed...

... and preserved examples of a Lower Proterozoic, largely sedimentary basin occurs in strata of the Kaniapiskau Supergroup of the Labrador Trough of northern Qu6bec and Labrador (Fig. 1). During the summer of 1978, the authors undertook stratigraphic field studies of the central portion of the Labrador Trough...

...Z. Top; W. B. Clarke Abstract Dissolved helium and neon, the 3 He/ 4 He isotope ratio, and tritium concentrations were measured in samples collected from 107 lakes and ponds in central Labrador during 1975 and 1976. Excess 4 He values relative to solubility equilibrium, and tritium- 3 He residence...

...B. Dressler Abstract Post-tectonic albite syenodiorite and cancrinite–arfvedsonite pegmatite are associated with a major fault in the Nachicapau and Marcel Lakes area within the eugeosyncline of the Labrador Trough. These rocks are not considered to be leucocratic associates of country tholeiites...

...C. F. Gower; A. B. Ryan; D. G. Bailey; A. Thomas Abstract Positions suggested for the Grenville Front in eastern and central Labrador span a 100 km wide belt. The criteria used by previous workers are reviewed and the conclusion drawn that the various attempts to define the Grenville Front...

... of certain Arctic or sub-Arctic regions. They are formed by the grounding of boulder-laden ice rafts in nearshore zones during spring ice break-up. In tidal areas, such as a Labrador fjord, intertidal ice freezes downward, with continued freezing at each high tide. Boulders are encased in the ice...

...R. E. Meyers; R. F. Emslie Abstract The Harp olivine diabase dikes, of Neohelikian age, form an east-northeast trending swarm that cuts rocks of the Harp Lake Complex in central Labrador. The petrography, and rock and mineral chemistry of the dikes indicate that they are transitional in character...

...W. B. Clarke; Z. Top; A. P. Beavan; S. S. Gandhi Abstract Measurements of dissolved helium, 3 He/ 4 He, and neon have been made in 60 water samples collected from 56 lakes and ponds in the Kaipokok region in Labrador. Tritium was measured in 8 water samples. The aim of the survey was to search...

...J. K. Park Abstract Paleomagnetic studies have been carried out on tower Proterozoic (Aphebian) rocks of the Labrador Trough in central Quebec. The magnetizations are complex. Most magnetizations are secondary and none are demonstrably original, but their relative order can be estimated from...

... and predominantly basic meta-igneous rocks in the centre. The results of a detailed gravity survey of the central part of the Labrador Trough between latitudes 55° 45′ and 57° 30′ and longitudes 66° 30′ and 70° are presented. Over 1500 rock samples provide density control for the interpretation of four residual...

...Erich Dimroth Abstract The sequence of the Labrador geosyncline is subdivided in three cycles, each beginning with deposition of shallow-water quartzites and precipitates and culminating with the deposition of thick shale–graywacke–basalt suites. This paper describes the stratigraphy...

...Jon North; D. H. C. Wilton Abstract Zn, Cu, and Fe are concentrated as stratiform and stratabound sulphide-rich beds in the Lower Proterozoic Warren Creek Formation, Moran Lake Group, central Labrador. Upper Member sedimentary rocks have a hydrothermal-like Fe enrichment but a dominantly...