Kaszab Zoltán (szerk.): A Magyar Természettudományi Múzeum évkönyve 76. (Budapest 1984)

Embey-Isztin, A.: Texture types and their relative frequencies in ultramafic and mafic xenoliths from Hungarian alkali basaltic rocks

ERNST. T. G. (1935): Olivinknollen der Basalte als Bruchstücke alter Olivinfelse. —Nachr. Akad: Wiss. Göttingen, Math.-Phys. KL, 1:147-154. FREY, F. A. & GREEN, D. H. (1974) : The mineralogy, geochemistry and origin of lherzolite inclusions in Victorian basanites. — Geochim. Cosmochim. Acta, 38: 1023-1059. HARTE, B. (1977): Rock nomenclature with particular relation to deformation and recrystallization textures in olivine-bearing xenoliths. — J. Geol., 85: 279-288. IRVING, A. J. (1974): Pyroxene-rich ultramafic xenoliths in he Newer Basalts of Victoria, Australia. — N. Jb. Miner. Abh., 120: 147-167. IRVING, A. J. (1980): Petrology and geochemistry of composite ultramafic xenoliths in alkalic basalts and implications for magmatic processes within the mantle. —Am.

./. Sei., 280-A: 389-426. JACKSON, E. D. (1971): The origin of ultramafic rocks by cumulus processes. — Fortschr. Miner., 48: 128-174. KUTOLIN, V. A. & FROLOVA, V. M. (1970): Petrology of ultrabasic inclusions from basalts of Minusa and Transbaikalian regions (Siberia, USSR). —• Contrib. Mineral. Petrol., 29: 163-179. MERCIER, J.-C. & NICOLAS, A. (1975): Textures and fabrics of upper mantle peridotites as illustrated by basalt xenoliths. — /. Petrol., 16: 454-487. NIELSON PIKE, J. E. & SCHWARZMAN, E. C. (1977): Classification of textures in ultramafic xenoliths. — J. Geol., 85: 9-61. POSGAY, K. (1975): Mit Reflexionmessungen bestimmte Horizonte und Geschwindigkeitsverteilung in der Erdkruste und im Erdmantel. — Geofiz. KözL, 23: 13-19. Ross, C. S., FOSTER, M. D. & MYERS, A. T. (1954): Origin of dunites and olivine-rich inclusions in basaltic rocks. — Am. Min., 39: 693-737. VARNE, R. (1977): On the origin of spinel lherzolite inclusions in basaltic rocks from Tasmania and elsewhere. — J. Petrology, 18: 1-23. WHITE, R. W. (1966): Ultramafic inclusions in basaltic rocks from Hawaii. — Contrib. Mineral. Petrol., 12: 245-314. WILSHIRE, H. G. & PIKE, J. E. N. (1975): Upper mantle diapirism: Evidence from analogous features in alpine peridotite and ultramafic inclusions in basalts. — Geology, 3: 467-470. Table 1. Relative frequencies of different xenolith types Xenolith type/Locality Szentbékálla Bondoró-hegy Szigliget Gérce Nógrád District lherzolite a C a a C harzburgite C c r C r wehrlite r j clinopyroxenite r r ' gabbro r s s megacrysts r a a a amphibolite/lherzolite r dunite/cl in opyr oxenite r lherzolite/clinopyroxenite r r a = abundant, c = common, s = sporadic, r = rare Author's address: DR. ANTAL EMBEY-ISZTIN Department of Mineralogy Hungarian Natural History Museum Budapest VIII,pf. 330 H-1370