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Pęcherzyki w szkliwie mołdawitów

100%
Brachaniec T., Szczyrba M.
Acta Societatis Metheoriticae Polonorum
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2014
|
vol. 5
17-20
EN
Bubbles in tektites can be formed by several different mechanisms. A review of published data has shown that the gas pressure in the bubbles is generally low. Composition of the contained gases published in most articles sharply differs from the composition of the terrestrial atmosphere.
2
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Skład chemiczny i mineralny Szkła Pustyni Libijskiej: badania wstępne z wykorzystaniem mikroskopu skaningowego (SEM) oraz mikrosondy elektronowej (EMPA)

81%
Szopa K., Brachaniec T., Szczyrba M.
Acta Societatis Metheoriticae Polonorum
|
2015
|
vol. 6
103-106
EN
In this study, fragment of the Libyan Desert Glass was investigated by using scanning electron microscope (SEM) and electron microprobe (EMP). The analyses reveal two differ areas in chemistry. the first one is homogenous in composition, but the second one is slightly enriched in Ti, and Fe content. During SEM and EMP observation, a relict of primary minerals was noted as a cracked zircon crystals.
3
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Osady molasowe źródłem mołdawitów

81%
Brachaniec T., Szopa K., Szczyrba M.
Acta Societatis Metheoriticae Polonorum
|
2014
|
vol. 5
25-29
EN
Moldavite are result of melting and mixing of ejecta Cenozoic deposits from Ries crater. The Czech moldavites have different Al, Ca and Si content in contrast to tektites from Lusatian area. Differences in chemical composition of moldavites are caused by local interbedded layers of Tertiary Obere Süâwasser Molasse, which are represented by: quartz sands and limestons with clays.
4
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Topliwość tektytów

71%
Brachaniec T., Szopa K., Krzykawski T., Broszkiewicz A., Szczyrba M.
Acta Societatis Metheoriticae Polonorum
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2014
|
vol. 5
21-24
EN
In this paper, results of melting experiment of tektites are presented. Tektites from four strewnfields: North American, Central European, Ivory Coast and Australasian were used. The fragments of investigated tektites were heated in oxide atmosphere in 1100oC in two time intervals: 5 and 120 minutes. The temperature of 1100oC is too low for completely melting of the studied material despite to heating in the same conditions but in small area (eg. in a spot).
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