Geological Reconnaissance, Boothia Peninsula, and Somerset, King William, and Prince of Wales Islands, District of Franklin

Blackadar, R G; Christie, R L

doi:10.4095/101069

Cited by 11 publications

(10 citation statements)

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“…In keeping with this data a number of F2 eyefolds can be observed on airphotos of the region. The largest of them (previously recorded by Blackadar andChristie 1963, andby Blackadar 1967, as an elongate domal structure) lies just to the north of the Fitz Roy Inlet traverse line (locality 6 on Fig. 6).…”

Section: Fig 2 Sketches Illustrating the Essential Relationships Ofmentioning

confidence: 95%

“…A number of authors (Blackadar and Christie 1963;Kerr and Christie 1965;Blackadar 1967) have commented on the fact that the north-south structural "grain" of the basement rocks is parallel to the trend of the Boothia Arch itself. This "grain" is, in fact, the modified compositional banding (So/S1).…”

Section: Fig 2 Sketches Illustrating the Essential Relationships Ofmentioning

confidence: 97%

“…The distribution of rock types on western Somerset Island and eastern Prince of Wales Island is shown on Map 37 in Blackadar and Christie (1963). The map was based-on a brief reconnaissance and airphoto study, and an arbitrary distinction was drawn between quartzo-feldspathic and mafic gneisses.…”

Section: Basement Rocks Lithologymentioning

confidence: 99%

“…1). The rocks are chiefly metamorphic, and form the basement core of a structure variously known as the Boothia Arch or Uplift (Fortier et al 1954;Blackadar and Christie 1963;Kerr and Christie 1965). We prefer to use the term "Arch" because it is a more general description of the regional Boothia structure, which was for considerable periods one of basement quiescence relative to 526 CANADIAN JOURNAL OF EARTH SCIENCES.…”

Section: Introductionmentioning

confidence: 98%

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The structure, metamorphism, and development of the Boothia Arch, Arctic Canada

Brown¹,

Dalziel²,

Rust³

1969

Can. J. Earth Sci.

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The Precambrian basement rocks of the Boothia Arch exhibit three phases of folding characteristic of deep-level deformation in mobile belts. Structural cross-sections demonstrate that the geometry of compositional layering and regionally parallel axial-plane foliation of first-phase folds is controlled primarily by structures of the second phase.The basement gneisses contain assemblages of the amphibolite-granulite transitional facies. The felsic gneisses exhibit a planar fabric clearly defined by nearly oblate quartz grains, usually considered to be typical of "granulite" facies rocks. In the Boothia Arch this foliation is an axial surface structure formed during the second fold phase. Fabric studies suggest that anhydrous assemblages stable in the granulite facies prior to the second phase of deformation were replaced during this phase by hydrous assemblages characteristic of the amphibolite-granulite transitional facies.The Boothia Arch was a source of clastic sediments during three periods of cover-rock deposition. It was a mild positive feature in Aston times (late Proterozoic or early Paleotoic), and was rapidly uplifted along north-south trends during late Silurian and early Devonian times to produce continental clastic facies of the Peel Sound Formation symmetrically related to the arch. The limited Cretaceous-Tertiary record suggests irregular uplift and localized deltaic sedimentation. At other times the Boothia Arch was insignificant as a source of detritus, and carbonates were deposited over the area.The north-south strike of compositional banding and axial surfaces of the first-and second-phase folds in the basement parallels the axis of the arch and axial surfaces of folds in the cover rocks. Also, fracture patterns in the basement and cover rocks are similar. Beyond this there is no obvious relationship between the internal structure of the basement and the later development of the arch.

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Section: Fig 2 Sketches Illustrating the Essential Relationships Ofmentioning

confidence: 95%

Section: Fig 2 Sketches Illustrating the Essential Relationships Ofmentioning

confidence: 97%

Section: Basement Rocks Lithologymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 98%

See 2 more Smart Citations

The structure, metamorphism, and development of the Boothia Arch, Arctic Canada

Brown¹,

Dalziel²,

Rust³

1969

Can. J. Earth Sci.

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show abstract

“…Somerset Island. Originally described in the early 1960s as "ultrabasic igneous breccias" (Blackadar and Christie, 1963), rocks on Somerset Island (figure 2 [3]) were later identified as kimberlites by Mitchell and Fritz (1973); this is the first kimberlite field 2 discovered in Canada. Because there is no forest or glacial drift cover in this area, the kimberlites are relatively easy to recognize by the contrast of their dark color against the pale-hued carbonate host rocks (figure 5).…”

Section: -1979: Few and Disappointing Discoveriesmentioning

confidence: 99%