1. Eggler, D. H. & Holloway, J. R. Oreg. Dep. Geol. Miner. Ind. Bull. 96, 15–36 (1977).
2. Wyllie, P. J. Am. Miner. 64, 469–500 (1979).
3. Heinrich, E. W. The Geology of Carbonatites (Rand-McNally, Chicago, 1966).
4. Deines, P. & Gold, D. P. Geochim. cosmochim. Acta 37, 1709–1733 (1973).
5. Suwa, K., Oana, S., Wada, H. & Osaki, S. Phys. Chem. Earth 9, 735–745 (1975).