Embey-Isztin, Antal

Szabó, Csaba

Vaselli, O.

English

Embey-Isztin Antal

University of Szeged

Acta Mineralogica-Petrographica, Szeged, XXXI, 97—98, 1990 IS SITKE A NEW LOCALITY OF PERIDOTITE XENOLITHS IN HUNGARY? COMMENTS ON THE PAPER "TEXTURAL FEATURES AND MODES OF ULTRAMAFIC XENOLITHES FROM SITKE, LITTLE PLAIN (HUNGARY)" BY CS. SZABO AND O. VASELLI A . EMBEY-ISZTIN* Mineralogical and Petrological Department, Hungarian Natural History Museum In this paper, SZABÓ and VASELLI, (1989) describe the texture of a series of peridotite xenoliths from Sitke as being distinct from the xenoliths of Gérce studied or at least mentioned in a number of papers by EMBEY-ISZTIN, (1976, 1978, 1984), EMBEY-ISZTIN et al. (1989, 1990) and DOWNES et al. (1992). In the region there is only one locality yielding relatively fresh mantle xenoliths, and this is the tuff ring exposed by a large and several smaller quarries near the villages of Gérce and Sitke as correctly shown by SZABÓ and VASELLI (1989) in their Fig. 2. Since the large quarry inside the tuff ring, which is the best place to find xenoliths, is situated somewhat nearer to Gérce (2 km) than to Sitke (2.3 km), Gérce rather than Sitke was used to designate the locality with the exception of my first paper (EMBEY-ISZTIN 1976) where the name of Sitke, amd another paper (EMBEY-ISZTIN 1978) in which Gérce-Sitke (!) was used. Consequently, there can be no doubt that the locality of Sitke is identical with that of Gérce. There is, however, another piece of evidence pointing to this conclusion. This is the result of the textural analysis of SZABÓ and VASELLI showing that porphy-roclastic textures prevail in the Sitke (=Gérce) mantle xenoliths and they occasi-onally exhibit transtitional features towards equigranular texture. However, this is not new either and it is in perfect agreement with former results (EMBEY-ISZTIN 1978, 1984, 1989), even if SZABÓ and VASELLI (1989, page 73) surprisingly state that "EMBEY-ISZTIN (1978) described xenoliths have protogranular-porphyroclas-tic transitional texture, but we have not recognized this type yet." In fact, the last description was used to characterize xenoliths of Szentbékálla and Szigliget. As far as Gérce xenoliths are concerned, EMBEY-ISZTIN, (1984, page 31) unequivo-cally confirms that "The overwhelming majority (81%) of these peridotites have porphyroclastic texture (e.g. G—1002, Fig. 2)" REFERENCES DOWNER, H. , EMBEY-ISZTIN, A . and THIRLWALL, M . F. in ( 1 9 9 2 ) : P e t r o l o g y and g e o c h e m i s t r y o f spinel peridotite xenoliths from Hungary: evidence from an association between enrichment and deformation in the upper mantle. Contrib. Mineral. Petrol. 109, 340—354. * H—1088 Budapest, Muzeum krt. 14-16, Hungary 97 

Is Sitke a new locality of peridotite xenoliths in Hungary? : comments on the paper "Textural features and modes of ultramafic xenoliths from Sitke, Little Plain (Hungary)" by Cs. Szabó, O. Vaselly

http://acta.bibl.u-szeged.hu/24787/1/mineralogica_031_097.pdf

Is Sitke a new locality of peridotite xenoliths in Hungary? : comments on the paper "Textural features and modes of ultramafic xenoliths from Sitke, Little Plain (Hungary)" by Cs. Szabó, O. Vaselly

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