论文信息 - A Norm for Feldspathoidal and Melilitic Igneous Rocks

A Norm for Feldspathoidal and Melilitic Igneous Rocks

A new normative calculation is presented for feldspathoidal and melilitic igneous rocks. It is similar to the CIPW system but favors calculation of nepheline as $$Na_{3}KAl_{4}Si_{4}O_{16}$$ and the formation of andradite, melilite, perovskite, and sphene. Calcium plagioclase is not calculated.

M. J. Bas

[1] R. Macdonald,et al. Oversaturated Peralkaline Glassy Trachytes from Kenya , 1970 .

[2] R. Macdonald,et al. Alkali-feldspar fractionation trends and the derivation of peralkaline liquids , 1969 .

[3] B. C. King. Petrogenesis of the Alkaline Igneous Rock Suites of the Volcanic and Intrusive Centres of Eastern Uganda , 1965 .

[4] S. Nockolds. AVERAGE CHEMICAL COMPOSITIONS OF SOME IGNEOUS ROCKS , 1954 .

[5] A. Holmes. The Petrology of Katungite , 1937, Geological Magazine.

[6] E. Tilley. On the proposed “doctoring” of the norm , 1933 .

[7] T. Barth. Proposed Change in Calculation of Norms of Rocks. , 1932 .

[8] C. E. Tilley. The Dolerite-Chalk Contact of Scawt Hill, Co. Antrim. The Production of Basic Alkali-Rocks by the Assimilation of Limestone by Basaltic Magma1 , 1931 .