Bulletin Mineralogie Petrologie

In the collection of the National Museum in Prague, there is one large moldavite from Chlum nad Malší sandpit in Southern Bohemia weighing 104.3 grams. Its size together with extremely dark colour raised suspicion that it is rather a tektite of an Australasian origin, perhaps indochinite. A tiny fragment was taken from the tektite to determine its chemical composition. Based on the content of K₂O, Na₂O, FeO and TiO₂ it is concluded that this tektite belongs to moldavite group. Its unusually dark colour is due to the relatively higher content of FeO and TiO₂ and relatively low content of CaO and MgO.

Albin E. F., Norman M. D., Roden M. F. (2000) Major and trace element compositions of georgiaites: Clues to the source of North American tektites. Meteoritics & Planetary Science 35, 795-806.

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Delano J. W., Lindsley D. H. (1982) Chemical systematics among the moldavite tektites. Geochim. Cosmochim. Acta 46, 2447-2452.

Delano J. W., Bouška V., Řanda Z. (1988) Geochemical constraints on the source-materials of moldavite tektites. 2nd International Conference on Natural Glasses, Prague 1987 (Konta J. eds.), 221-230.

Engelhardt W. von, Berthold C., Wenzel T., Dehner T. (2005) Chemistry, small-scale inhomogenity, and formation of moldavites as condensates from sand vaporized by the Ries impact. Geochim. Cosmochim. Acta 69, 23, 5611-5626.

Glass B. P. (1989): North American tektite debris and impact ejecta from DSDP site 612. Meteoritics 24, 209-218.

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Chao E. C. T. (1963) The petrographic and chemical characteristics of tektites. In: O'Keefe J. A. (eds.): Tektites, University Chicago Press, 51-94.

Chapman D. R., Scheiber L. C. (1969) Chemical investigation of Australasian tektites. Journ. Geophys. Research 74, 27, 6737-6776.

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Lange J. M. (1995) Lausitzer Moldavite und ihre Fundschichten. Schriftenreihe f. Geowissenschaften 3, 1-134.

Philpotts J. A., Pinson W. H. Jr. (1966) New data on the chemical composition and origin of moldavites. Geochim. Cosmochim. Acta 30, 253-266.

Pouchou J. L., Pichoir F. (1985) “PAP” (φρZ) procedure for improved quantitative microanalysis. In: Microbeam Analysis (J. T. Armstrong, ed.). San Francisco Press, San Francisco, 104-106.

Skála R., Strnad L., McCammon C., Čada M. (2009) Moldavites from the Cheb Basin, Czech Republic. Geochim. Cosmochim. Acta 73, 1145-1179.

Švardalová L. (2007): Charakteristika vltavínů typu Muong Nong.- MS, Diplomová práce PřF MU. Brno

Švardalová L., Skála R., Trnka M., Houzar S., Novák M. (2008): Extremely heterogeneous Muong Nong type moldavites.- 39th Lunar and Planetary Science Conference, 1962. Houston

Trnka M. (1980) Skulptace moravských vltavínů. Přírod. Sbor. Západomor. Muz. (4. konference o vltavínech) 11, 249-260.

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Trnka M., Houzar S. (2002) Moldavites: a review. Bull. Czech Geol. Survey 77, 283-302.

Trnka M. (2003) Atypické vltavíny ze Slavče u Trhových Svinů (jižní Čechy). Přírodovědný sborník Západomoravského muzea (9. konference o vltavínech), 41, 31-44.