By Professor Günther H. Friedrich, Professor Alexandr D. Genkin (auth.), Professor Günther H. Friedrich, Professor Alexandr D. Genkin, Professor Anthony J. Naldrett, Professor John D. Ridge, Dr. Richard H. Sillitoe, Professor Frank M. Vokes (eds.)
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Additional info for Geology and Metallogeny of Copper Deposits: Proceedings of the Copper Symposium 27th International Geological Congress Moscow, 1984
M. Ripley: Application of Stable Isotopic Studies Sasaki A (1969) Sulfur isotope study of the Muskox intrusion, District of MacKenzie. Geol Surv Can Pap 68-46:68 pp Shima H, Naldrett AJ (1975) Solubility of sulfur in an ultramafic melt and the relevance of the system Fe-S-O. Econ Geol60:960-967 Shima M, Gross WH, Thode HG (1963) Sulfur isotope abundances in basic sills, differentiated granites, and meteorites. J Geophys Res 68:2835 - 2847 Taylor HP Jr (1980) The effects of assimilation of country rocks by magmas on 180/ 160 and 87Sr/86Sr systematics in igneous rocks.
If sufficient hydrogen is present in inclusions formed within early crystallizing silicates, such as olivine, pyroxene, or plagioclase, hydrogen isotopic composition of these phases relative to late crystallizing hydrous phases, such as biotite or amphibole, may aid in reconstructing the timing of introduction of country rock hydrogen. Carbon. Analysis of J 13C in mafic rocks provides valuable information as to the relative importance of igneous versus sedimentary-derived carbon in the oreforming process.
Analysis of J 13C in mafic rocks provides valuable information as to the relative importance of igneous versus sedimentary-derived carbon in the oreforming process. Many deposits are thought to contain primary graphite associated with sulfides, whereas in deposits, such as those of the Duluth Complex, much of the graphite was derived from country rocks (Hollister 1980, Mainwaring and Douthitt 1981). Primary igneous carbon is normally characterized by J 13C values near - 5%0. Sedimentary carbon may be much lighter or heavier, depending on its genesis as biogenic or carbonate carbon of marine or nonmarine origin.