...R. F. Emslie; E. Irving; J. K. Park Abstract Newly available isotopic age measurements and paleomagnetic results on rocks of the Michikamau Intrusion and its surroundings have made possible more precise estimates of the position and age of the paleomagnetic pole. Results from six new collecting...

...Ronald F. Emslie Abstract The Michikamau Intrusion is a large, unmetamorphosed anorthositic mass lying within the broad belt of anorthositic bodies extending from southeastern Ontario to Labrador. Potassium–argon biotite dates place the time of crystallization of the intrusion at approximately 1...

...G. S. Murthy; W. F. Fahrig; D. L. Jones Abstract Twenty-nine oriented cores have been collected from six sites in the Michikamau Intrusion in Labrador. This had previously been well dated at 1400 m.y. by the potassium–argon method. A fold test has been applied to the paleomagnetic results after...

... of the Michikamau anorthositic intrusion, Labrador . Nature 202 , 172 – 173 . Emslie , R.F. ( 1965 ): The Michikamau anorthositic intrusion, Labrador . Can. J. Earth Sci . 2 , 385 – 399 . Emslie , R.F. ( 1969 ): Crystallization and differentiation of the Michikamau intrusion...

...F IG . 9. Schematic cross section of the 2,000 km 2 Michikamau anorthositic intrusion, southeastern Labrador, Canada (modified from Emslie, 1970 ). The Michikamau intrusion is dominated by a lower Layered Series of leucotroctolitic and troctolitic cumulates overlain by a thick...

... L. Henderson R. G. Interative three-dimensional solution of gravity anomaly data using a digital computer Geophysics 1968 33 596 601 Emslie R. F. The Michikamau Anorthositic Intrusion, Labrador Can. J. Earth Sci 1965 2 385 99 Emslie R. F. The geology...

... to constitute an 'anorthosite suite' without prejudgement as to genetic implications.About 700 rock analyses, largely from the literature but supplemented by previously unpublished analyses from the Michikamau and Morin intrusions have been used to examine some of the chemical characteristics of the anorthosite...

.... , The Michikamau anorthositic intrusion, Labrador , Canad. J. Earth Sci. , 2 , 385 – 399 , 1965 . 15. Emslie , R.F. , Geology and petrology of the Harp Lake Complex , Central Labrador: an example of Elsonian magmatism, Geol. Surv. Canad. Bull...

... anorthosite ( Martignole et al. 1993 ) (Pe in Fig. 1 ) and the 1327 ± 16 Ma ( Hébert et al. 2005 ) De La Blache massif (D in Fig. 1 ), both occurring within the “cold orogenic lid” region of the eastern Grenville Province. The rest—and collectively more voluminous—(Michikamau, Harp Lake, and Nain intrusive...

.... EMSLIE, R. F., (1970) The geology of the Michikamau intrusion. Geol. Surr. Can. Pub., pp.57-68. FORBES, W. C. and FLOWER, M. F. J., (1974) Phase relations of titan-phlogopite, K2Mg4Ti A12Si6020 (OH)4: a refractory phase in the upper mantle? Earth planet. Sci. Lett., v. 22, pp. 60-66. GREEN, D. H...

..., and is the oldest. It may not be unique, however, as a coeval and lithologically similar body occupies a comparable tectonic setting in the eastern Churchill Province east of Michikamau Lake. South of the Trans-Labrador batholith, dated rocks include the Grady Island layered mafic intrusion and White Bear Arm...

... anorthosites, nor do they follow the iron-enrichment, silica-depletion differentiation trend characteristic of anorthositic magmas ( Scoates 1994 , 2008 , Morisset et al. 2009 ). It is generally agreed that a link exists between layered mafic intrusions and massif anorthosites ( Morse 1968 , Ashwal...

...Fig. 6 Comparison of Fo contents of olivine with An content of plagioclase from massif-type anorthosites and selected layered intrusions. Note that compositions of Zebra Mountain samples are more magnesian and calcic than in anorthosite massifs elsewhere. Figure modified after Ashwal (1993) . HL...

... with features transitional between massif-type anorthosites and layered intrusions such as the Duluth and Michikamau intrusions. Table 1. Compositional data for rocks from the Tete Complex Sample Name LDA 11 LDA 19 LDA 3 LDA 5b D 467 TRDAN MASS CB 117...

...Joshua M. Feinberg; Gary R. Scott; Paul R. Renne; Hans-Rudolf Wenk Abstract Submicroscopic, needle-shaped titanomagnetite inclusions exsolved in silicate minerals commonly occur in mafic intrusive rocks and are protected from alteration by their silicate hosts, making them excellent candidates...

... by a poorly exposed monzosyenite unit to the southwest. The sequence described here stands in contrast to the layered units of Michikamau Intrusion, Labrador ( Emslie 1970 ), where anorthosite overlies more mafic layers, a relationship to be expected if buoyancy alone controlled the formation of layering...