Stratigraphic and structural relations of the Milford, Kaslo and Slocan groups, Goat range, Lardeau and Nelson map areas, British Columbia

Nina Creek Group and Lay Range Assemblage, north-central British Columbia: remnants of late Paleozoic oceanic and arc terranes

“…This type of ocean-floor volcanism is also consistent with a back-arc setting (Tarney et al 198 1). Taken as a whole, basalts in other area of the Slide Mountain terrane do encompass the entire Mississippian through Permian time span of the basin (Nelson and Bradford 1993;Nelson 1993;Struik and Orchard 1985;Harms 1986;Schiarizza and Preto 1987;Klepacki and Wheeler 1985), although this could mean that sea-floor spreading was Biachronous. A more precise interpretation of Slide Mountain terrane stratigraphy is hampered by its ubiquitous structural imbrication and incomplete fossil record.…”

“…The size and configuration of the Slide Mountain basin have been the subject of much discussion, with estimates varying from Pacific-size oceans (Harms 1986;Speed 1979;Snyder and Bruxkner 1985) to narrow marginal seas (Klepacki and Wheeler 1985 ;Schiarizza and Preto 1987;Miller et al 1992;Nelson 1993;Roback et al 1994). If tectonic processes were more episodic than continuous, as proposed here, the average width was probably in the order of hundreds rather than thousands of kilometres.…”

“…1). Parts of the Slide Mountain terrane have been interpreted as remnants of a large late Paleozoic ocean (Monger 1977;Harm 1986;Gabrielse 1991) or as a marginal basin along the late Paleozoic continental margin (Monger 1977;Klepacki and Wheeler 1985;Schiarizza and Preto 1987;Struik 1987;Miller et al 1984Miller et al , 1992Nelson 1993;Roback et al 1994).…”

Detrital zircon geochronology and provenance of Late Proterozoic and mid-Paleozoic successions outboard of the miogeocline, southeastern Canadian Cordillera

“…Only single-grain analyses are shown. Stratigraphic columns of the Upper Arrow Lake area are from Lemieux (2006), and stratigraphic columns of northern Kootenay Arc area are modified after Fyles and Eastwood (1962), Read (1973), Klepacki and Wheeler (1985), and Colpron and Price (1995). The asterisks (*) denote units from Read (1973).…”

“…The Mississippian Milford Group unconformably overlies the Lardeau Group (Read 1973(Read , 1975Lemieux et al 2004). South of the study area, in the Goat Ranges, Klepacki and Wheeler (1985) subdivided the Milford Group into three temporally equivalent assemblages, each occupying elongate fault-bounded panels: from east to west, they are the Davis, Keen Creek, and McHardy assemblages. Only the McHardy assemblage is exposed in the present study area.…”