Hostname: page-component-586b7cd67f-2brh9 Total loading time: 0 Render date: 2024-11-23T00:19:12.576Z Has data issue: false hasContentIssue false
  • English
  • Français

Amphibolitic rocks from the Precambrian of Grand Canyon: mineral chemistry and phase petrology

Published online by Cambridge University Press:  05 July 2018

Malcolm D. Clark
Malcolm D. Clark*
Affiliation:
Department of Geology, University of Leicester, England
Get access Rights & Permissions [Opens in a new window]

Summary

The amphibolites and mafic schists that occur in the Precambrian metamorphic rocks of the Grand Canyon are divided into five major groups: anthophyllite and cordierite-anthophyllite rocks, early amphibolites, Granite Park mafic complex, hornblende-beating dykes, and tremolite-bearing dykes. Many types of amphibole occur in these rocks. Microprobe analyses identify gedrite, anthophyllite, cummingtonite, and grunerite, as well as three groups of calcic amphiboles. These last range in composition from colourless tremo-litic or actinolitic amphiboles, through pale-green horn-blende, to strongly pleochroic green-brown hornblende, which contains a significant proportion of the tscherma-kite and pargasite endmembers. Phase relationships between the coexisting amphiboles and other minerals are presented for two regional metamorphic events. Assem-blages containing chlorite, garnet, and hornblende were formed during the first event; from the absence of staurolite, but the presence of almandine garnet and oligoclase-andesine, it is concluded that the metamorphic grade was between the upper greenschist and the lower amphibolite facies. The second period of metamorphism produced rocks of the staurolite and sillimanite zones, within which three main ‘subfacies’ can be distinguished on the basis of phase relationships in the mafic schists.

Type
Research Article
Information
Mineralogical Magazine , Volume 42 , Issue 322 , June 1978 , pp. 199 - 207
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1978

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Babcock, (R. S.), Brown, (E. H.), and Clark, (M. D.), 1974. In Breed, (W. J.) and Roat, (E. C.) (eds.), Geology of the Grand Canyon, ch. 7, PP. 2-19. Mus. N. Ariz., Flagstaff, and Grand Canyon Nat. Hist. Assoc.Google Scholar
Clark, (M. D.), Brown, (E. H.), and Livingston, (D. E.), 1977. Unpublished MS.Google Scholar
Binns, (R. A.), 1965. Mineral. Mag. 35, 308-26.Google Scholar
Brown, (E. H.), 1967. Contrib. Mineral. Petrol. 13, 259-92.CrossRefGoogle Scholar
Brown, (E. H.), 1969. Am. Mineral. 54, 1662-877.Google Scholar
Brown, (E. H.), Clark, (M. D.), and Babcock, (R. S.), 1977. Unpublished MS.Google Scholar
Chinner, (G. A.) and Fox, (J. S.), 1974. Geol. Mag. 111, 397-508.CrossRefGoogle Scholar
Clark, (M. D.), 1977. Unpublished MS.Google Scholar
Clark, (M. D.), Babcock, (R. S.), and Brown, (E. H.), 1976. Geologic map of the Grand Canyon National Park, Arizona (Older Precambrian geology). Grand Canyon Nat. Hist. Assoc. and Mus. N. Ariz., Flagstaff.Google Scholar
Clark, (M. D.), Brown, (E. H.), and Babcock, (R. S.), 1977. Geologic map of the western Grand Canyon, Arizona (Older Precambrian geology). In press.Google Scholar
Colby, (J. W.), 1968. Advances in X-ray Analysis. 11, 287-305.CrossRefGoogle Scholar
Colby, (J. W.), 1971. Magic IV—-a computer program for quantita tive electron microprobe analysis. Unpublished MS., Bell Telephone Labs.Google Scholar
Deer, (W. A.), Howie, (R. A.), and Zussman, (J.), 1963. Rock-forming Minerals. Longmans, London.Google Scholar
Dodge, (F. C. W.), Papike, (J. J.), and Mays, (R. E.), 1968. J. Petrol. 9, 378–410.CrossRefGoogle Scholar
Ernst, (W. G.), 1968. Amphiboles. Springer Verlag, New York.CrossRefGoogle Scholar
Eskola, (P.), 1915. Bull. Comm. Geol. Finlande, no. 44, 109-413.Google Scholar
Green, (J. C.), 1960. Geology of the Errol Quadrangle, New Hampshire—-Maine. Ph.D. thesis, Harvard University.Google Scholar
Hallimond, (A. F.), 1943. Am. Mineral. 28, 65-89.Google Scholar
Jaffe, (H. W.), Groenevald Meyer, (W. O. J.), and Selchow, (D. H.), 1961. Ibid. 46, 642-53.Google Scholar
Korzhinskii, (D. S.), 1959. Physiochemical basis of the analysis of the paragenesis of minerals. New York Consultants Bur.Google Scholar
Leake, (B. E.), 1968. Geol. Soc. Am. Spec. Pap. 98.Google Scholar
Livingston, (D. E.), Brown, (E. H.), Babcock, (R. S.), and Clark, (M. D.), 1974. Geol. Soc. Am., Abstr. with programs. 6, 848-9.Google Scholar
Montgomery, (A.), 1953. New Mexico Bur. Mines Mineral Res. Bull. 30.Google Scholar
Muller, (G.) and Schneider, (A.), 1971. Contrib. Mineral. Petrol. 31, 178-200.CrossRefGoogle Scholar
Rabbitt, (J. C.), 1948. Am. Mineral. 33, 263–323.Google Scholar
Rickwood, (P. C.), 1968. Contrib. Mineral. Petrol. 18, 175-98.CrossRefGoogle Scholar
Robinson, (P.) and Jaffe, (H. W.), 1969. Mineral. Soc. Am. Spec. Pap. 2, 251-74.Google Scholar
Robinson, (P.), and Jaffe, (H. W.), Klein, (C.), and Ross, (M.), 1969. Contrib. Mineral. Petrol. 22, 248-58.CrossRefGoogle Scholar
Robinson, (P.), Ross, (M.), and Jaffe, (H. W.), 197. Am. Mineral. 56, 1005-41.Google Scholar
Ross, (M.), Papike, (J. J.), and Shaw, (K. W.), 1969. Mineral. Soc. Am. Spec. Pap. 2, 275-99.Google Scholar
Stout, (J. H.), 1972. J. Petrol. 13, 99-145.CrossRefGoogle Scholar
Travis, (R. B.), 1956. Am. Mineral. 41, 796-9.Google Scholar
Travis, (R. B.), Windley, (B. F.) and Smith, (J. V.), 1974. Bull. Grøntands Geol. Unders., no. 108.Google Scholar
Winkler, (H. J. F., 1976. Petrogenesis of metamorphic rocks. Springer Verlag, New York.CrossRefGoogle Scholar
Wynne-Edwards, (H. R.) and Hay, (P. W.), 1963. Can. Mineral. 7, 453-78.Google Scholar

A correction has been issued for this article:

Errata and Addenda