Vörös A. szerk.: Fragmenta Mineralogica Et Palaentologica 11. 1983. (Budapest, 1983)

Fig. 1 Localities of garnetiferous magmatic rocks in Hungary lighter coloured core surrounded by a darker rim. Rarely the zoning is manifested in a complex manner: lighter and darker coloured bands alternate. Besides the common dark red-violet garnets very rarely pink garnets can also be found. The Királyrét garnets contain numerous mineral inclusions, however, the amount of these is very variable from one grain to another. Among the inclusions, zoned plagioclase feldspar, amphibole, allotriomorphic opaque grains and apatite can be identified. Several hundred meters N-eastward of Büdöstó pyroxenic (hypersthene) amphibole andésite is outcroping. This rock also contains garnets up to 1 cm in diameter with many ruptures as well as inclusions (feldspar, opaque grain, apatite, amphibole and biotite). The Királyrét garnets originated very probably from this kind of andésite. At Bajdázó Hill (about 1 km north from Királyrét) smaller garnets (1-3 mm) are frequently found in a leucocratic biotitic amphibole andésite characterized by fine-grained ground mass. The garnets are mostly euhedral, rarely resorbed, almost without any rupture. Also they are the most inclusion-free ones among all the garnets investigated. However, scarcely tiny apatite needles, opaque grains and small plagioclase can be seen in these garnets. No colour zoning has been detected. Csehvár (East of the village Diósjenő, Börzsöny Mts). Hyperstenic amphibole andésite and amphibolic biotite andésite carry 2-4 mm large garnet grains. Garnets are intensively ruptured and contain unusually great quantities of plagioclase feldspar inclusions as well as small opaque grains and very rarely hyperstene. A corona composed of small closely packed plagioclase laths surrounds frequently the garnet grains (Fig. 2 and Plate I, Fig. 1). Nagybörzsöny (Western part of the Börzsöny Mts). In amphibole andésite 1-3 mm large inclusion-rich garnets are frequently found. The isometric grains are intensively fractured and mostly resorbed. The resorbed grains have frequently a feldspar + mica corona. The commonest inclusions are feldspar, opaque, amphibole and rarely hyperstene. Sometimes a relatively inclusion-free core is surrounded by a rim rich in plagioclase inclusions. It may be highly significant genetically that the inclusion-poor core shows little evidence of fracturing, while inclusion-rich rim is intensively ruptured. In general, it can be stated that the higher the quantity of inclusions especially that of plagioclase in the garnet, the more intensively it is fractured. Báránybérc (West from Csehvár, Börzsöny Mts). Smaller (1-2 mm) relatively inclusion free and hence less fractured garnets can be found in hornblende andésite. A smaller resorbed garnet grain occurring as inclusion in a biotite crystal is worthy to be pointed out (Plate I, Fig. 2). Pilisszentlélek (Visegrád Mts). 2-3 mm large mostly euhedral quite incusion and rupture-free garnets occur in a leucocratic biotite andésite with fine-grained matrix. Plagioclase is very occasionally included in these garnets the most frequent inclusions being the needles of apatite wich in turn occur very rarely in the host rock itself. In some cases the garnets show colour zoning, the core being somewhat darker than the rim. Sometimes plagioclase and/or amphibole are intergrown forming irregular contants with garnet (Plate II, Fig. 1). Flow lines indicating the presence of the garnet grains in the magma before eruption can also be seen (Fig. 2/10).