Abstract
MODELS for the emplacement of the western Newfoundland ophiolite suites include obduction over an eastward-dipping subduction zone1, but no blueschist facies assemblages, considered to form in response to the high P/T gradients associated with subduction, have yet been identified in this area. Magnesioriebeckite and crossite which occur in metavolcanics from the vicinity of Croque, northwestern Newfoundland, provide the first indication that these conditions may have been approached. This report deals with the petrographic relations, composition and probable conditions of formation of the Newfoundland sodic amphiboles, the latest in a series of occurrences described from Vermont2,3, Quebec4 and New Brunswick5,6 (Fig. 1).
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References
Strong, D. F., A.I.M.E. Soc. Mining Engr. Preprint 73-1-320, 31 pp. (1973).
Laird, J., and Albee, A. L., Geol. Soc. Am. Abstr. with Prog., 7, 1159 (1975).
Doolan, B. L., Drake, J. C., and Crocker, D., Geol. Soc. Am. Abstr. with Prog., 5, 157 (1973).
Trzcienski, W. E., Can. J. Earth Sci., 13, 711–714 (1976).
Helmstaedt, H., Geol. Surv. Can. Pap., 70–28 (1971).
Skinner, R., Geol. Surv. Can. Mem., 371, 113 pp. (1974).
Smyth, W. R., thesis, Memorial Univ. (unpubl), 172 pp. (1973).
Deer, W. A., Howie, R. A., and Zussman, J., Rock-Forming Minerals, 2, 333–351 (1963).
Coleman, R. G., and Papike, J. J., J. Petrol., 9, 105–122 (1968).
Klein, C., Am. Mineral., 54, 212–237 (1969).
Himmelberg, G. R., and Papike, J. J., J. Petrol., 10, 102–114 (1969).
Liou, J. G., Ho, C.O., and Yen, T. P., J. Petrol., 16, 80–109 (1975).
Klein, C., J. Petrol., 7, 246–305 (1966).
Brown, E. H., Bull., Geol. Soc. Am. 85, 333–344 (1974).
Turner, F. J., Metamorphic Petrology, Mineralogical and Field Aspects, 289–290 (1968).
Brown, E. H., J. Petrol., 16, 258–271 (1975).
Williams, H., Can. J. Earth Sci. 12, 1874–1894 (1975).
Williams, H., and Stevens, R. K., in The Geology of Continental Margins (edit. by C. A. Burk and C. L. Drake) 781–796 (1974).
De Wit, M. J., and Strong, D. F., J. Geol. 83, 609–627 (1975).
Papike, J. J., Cameron, K. L., and Baldwin, K., Geol. Soc. Am. Abstr. with Prog., 6, 1053–1054 (1974).
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JAMIESON, R. The first metamorphic sodic amphibole identified from the Newfoundland Appalachians—its occurrence, composition and possible tectonic implications . Nature 265, 428–430 (1977). https://doi.org/10.1038/265428a0
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DOI: https://doi.org/10.1038/265428a0
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