Abstract
ONE of the more important aspects of understanding the geochemical differentiation of the Earth is an accurate knowledge of the compositions of magmas produced by direct melting of the upper mantle, which are called primary magmas1. It is clear that a variety of primary magma compositions can develop within the mantle, depending on the source composition, the presence of volatiles, the extent of melting and the pressure of melt segregation1–4. Proposed primary magma compositions span a wide composition range, from basalts with ∼8–ll% MgO, through picrites with ∼11–20% MgO, to komatiites with ∼20–28% MgO; there is no agreement as to which is the dominant type of primary magma. We suggest here that the abundances of chromium in samples of the Earth's upper mantle indicate that, of the wide variety of possible primary liquids produced in experimental studies of mantle melting, the dominant type of primary liquid actually extracted from the mantle has been picritic to komatiitic, with ≳;15% MgO.
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References
Basaltic Volcanism Study Project Basaltic Volcanism on the Terrestrial Planets (Pergamon, New York, 1981).
Frey, F. A., Green, D. H. & Roy, S. D. J. Petrol. 19, 463–513 (1978).
Jaques, A. L. & Green, D. H. Contr. Miner Petrol. 73, 287–310 (1980).
Takahashi, E. & Kushiro, I. Am. Miner. 68, 859–879 (1983).
Frey, F. A. & Prinz, M. Earth planet. Sci. Lett. 38, 129–176 (1978).
Dick, H. J. B., Fisher, R. L. & Bryan, W. B. Earth planet. Sci. Lett. 69, 88–106 (1984).
Frey, F. A., Suen, C. J. & Stockman, H. W. Geochim. cosmochim. Acta 49, 2469–2491 (1985).
Nickel, K. G. & Green, D. H. in Kimberlites II: The Mantle and Crust-Mantle Relationships (ed. Kornprobst, J.) (Elsevier, Amsterdam, 1984).
Preβ, S., Witt, G., Seck, H. A., Eonov, D. & Kovalenko, V. I. Geochim. cosmochim. Acta 50, 2587–2599 (1986).
Reid, J. B. & Woods, G. A. Earth planet. Sci. Lett. 41, 303–316 (1978).
O'Hara, M. J., Saunders, M. J. & Mercy, E. L. P. Phys. Chem. Earth 9, 571–604 (1975).
Seyler, M. & Mattson, P. H. J. geophys. Res. 94, 7629–7660 (1989).
Ernst, W. G. J. Petrol. 19, 341–392 (1978).
Ottonello, G., Ernst, W. G., & Joron, J. L. J. petrol. 25, 343–372 (1984).
Bonatti, E., Ottonello, G. & Hamlyn, P. R. J. geophys. Res. 91, 599–631 (1986).
Francis, D. J. Petrol. 28, 569–597 (1987).
Shaw, D. M. Geochim. cosmochim. Acta 34, 237–243 (1970).
Roeder, P. L. & Emslie, R. F. Contr. Miner. Petrol. 19, 275–289 (1970).
Komor, S., Elthon, D. & Casey, J. F. J. geophys. Res. 90, 7705–7736 (1985).
Irvine, T. N. Geology 5, 273–277 (1977).
Kurat, G. et al. Geochim. cosmochim. Acta 44, 45–60 (1980).
Frey, F. A. & Green, D. H. Geochim. cosmochim. Acta 38, 1023–1059 (1974).
O'Reilly, S. Y. & Griffin, W. L. Geochim. cosmochim. Acta 52, 433–447 (1988).
Chen, C. Y., Frey, F. A. & Song, Y. Earth planet Sci. Lett. 93, 195–209 (1989).
Roden, M. F., Irving, A. J. & Murthy, V. R. Geochim. cosmochim. Acta 52, 462–473 (1988).
Embey-Isztin, A., Scharbert, H. G., Dirtrich, H. & Poultidis, H. J. Petrol. 30, 79–105 (1989).
Stosch, H.-G. & Seck, H. A. Geochim. cosmochim. Acta 44, 457–470 (1980).
Seyfried, W. E. Jr & Dibble, W. E. Jr Geochim. cosmochim. Acta 44, 309–321 (1980).
Elthon, D. & Scarfe, C. M. Am. Miner. 69, 1–15 (1984).
Bickle, M. J., Ford, C. E. & Nisbet, E. G. Earth planet Sci. Lett. 37, 97–106 (1977).
Herzberg, C. T. & O'Hara, M. J. Geophys. Res. Lett. 12, 541–544 (1985).
Ohtani, E. Earth planet Sci. Lett. 67, 261–272 (1984).
Takahashi, E. J. geophys. Res. 91, 9367–9382 (1986).
Zindler, A. & Jagoutz, E. Geochim. cosmochim. Acta 52, 319–333 (1988).
Arndt, N. T., Naldrett, A. J. & Pike, D. R. J. Petrol. 18, 319–369 (1977).
Maaloe, S. & Aoki, K. Contr. Miner. Petrol. 63, 161–173 (1977).
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Liang, Y., Elthon, D. Evidence from chromium abundances in mantle rocks for extraction of picrite and komatiite melts. Nature 343, 551–553 (1990). https://doi.org/10.1038/343551a0
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DOI: https://doi.org/10.1038/343551a0
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