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Chrome-spinels from the Massif du Sud, southern New Caledonia

Published online by Cambridge University Press:  05 July 2018

K. A. Rodgers
K. A. Rodgers*
Affiliation:
Department of Geology, University of Auckland, New Zealand
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Summary

Approximately forty, variously shaped, chromitite bodies occur in dunites and harzburgites of the alpine-type peridotite complex of southern New Caledonia. The chromitites consist of pichrochromite (59 to 42% Cr2O3) and serpentinized olivine (Fo96-92) and display a variety of textures (massive, disseminated, and orbicular) consistent with a magmatic cumulate origin. Dunites contain olivine (Fo93−97) and 1 to 3% picrochromite (50 to 39% Cr2O3). Harzburgites have less than 1% spinel, ranging from picrochromite to ceylonite (45 to 28% Cr2O3) and often forming symplectic intergrowths with bronzite. Temperatures of crystallization of the cumulate picrochromites are believed to have been about 1200 °C while the more aluminous symplectic spinels equilibrated under different conditions and may reflect a late stage recrystallization episode.

Type
Research Article
Information
Mineralogical Magazine , Volume 39 , Issue 303 , September 1973 , pp. 326 - 339
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1973

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References

Challis, (G .A.), 1965. South Petrology, 6, 322-64.Google Scholar
Cheng, (Ch.), 1965. Acta Geologica Sinica, 45, 276.Google Scholar
Gibb, (F. G. F.), 1971. Contr. Min. Petr., 30, 103.CrossRefGoogle Scholar
Glasser, (E.), 1904. Ann. Mines ser. 10, 4, 299, 397; 5, 503, 623.Google Scholar
Green, (D. H.), 1964. Journ. Petrology, 5, 134.CrossRefGoogle Scholar
Guillon, (J. H.), 1969. Cahiers O.R.S.T.O.M., série Géol., 1, 7.Google Scholar
Guillon, (J. H.) 1970. Compt. Rend. Acad. Sci. Paris, 271D, 700.Google Scholar
Irvine, (T. N.), 1965. Canad. Journ. Earth Sci., 2, 648.CrossRefGoogle Scholar
Irvine, (T. N.) 1967. Ibid. 4, 71.CrossRefGoogle Scholar
Jackson, (E. D.), 1969. Symposium on magmatic ore deposits, Econ. Geol. Monograph, 4, 41.Google Scholar
Koch, (P.), 1958. Bull. Géol. Nouvelle Caledonie, 1, 23.Google Scholar
Kushiro, (I.) and Yoder, (H. S.), 1964. Carnegie Inst. Yearbook, 63, 108.Google Scholar
Lacroix, (A.), 1942. Mem. Acad. Sci. Inst, franç., 66.Google Scholar
Lonev, (R. A.), Himmelberg, (G. R.), and Coleman, (R. C.), 1971. Journ. Petrology, 12, 245.Google Scholar
Macgregor, (I. D.) and Smith, (C. H.), 1963. Canad, Min., 1, 403–12.Google Scholar
Maurejol, (P.) and Cochet, (A.), 1958. Bull. Géol. Nouvelle Calédonie, 1, 97.Google Scholar
Maxwell, (J. C.), 1949. Econ. Geol., 44, 524.CrossRefGoogle Scholar
Panagos, (A.) and Ottemann, (J.), 1966. Mineralium Deposita, 1, 12.CrossRefGoogle Scholar
Pavlov, (N. V.) and Chuprynina, (I. I.) 1967. Geochem. Internat., 4, 214 (transi, from ).Google Scholar
Rodgers, (K. A.), 1972. Ultramafic and related rocks from southern New Caledonia. University of Auckland Ph.D. thesis (unpublished).Google Scholar
Ross, (C. S.), Foster, (M. D.), and Myers, (A. T.), 1954. Amer. Min., 39, 693–737.Google Scholar
Routhier, (P.), 1963. Les gisements metalliferes. Paris (Masson).Google Scholar
Simpson, (E. S.), 1921. Min. Mag., 19, 99.Google Scholar
[Sokolov, (G. A.)] Cokoaob, (T. A.), 1958. (Chromite ores of the Ural.) Moscow (Geology Press).Google Scholar
Stanton, (R. L.), 1958. Bull. Geol. Nouvelle Calédonie, 1, 51.Google Scholar
Tazaki, (K.), Ito, (E.), and Komatsu, (M.), 1972. Journ. Geol. Sac. Japan, 78, 347.CrossRefGoogle Scholar
Thayer, (T. P.), 1946. Econ. Geol., 41, 202.CrossRefGoogle Scholar
Thayer, (T. P.), 1960. Rep. 2ist Internat. Geol. Congr. part 13, 247.Google Scholar
Toni, (C.), 1965. Contribution kFetude des chromites de la Nouvelle Calédonie. Montpellier thesis (unpublished).Google Scholar