文章基本信息

标题：Origin of parautochthonous Polish moldavites – a palaeogeographical and petrographical study
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作者：Krzysztof SZOPA ; Janusz BADURA ; Tomasz BRACHANIEC 等
期刊名称：Rocznik Polskiego Towarzystwa Geologicznego
印刷版ISSN：0079-3663
出版年度：2017
卷号：87
期号：1
页码：1-12
DOI：10.14241/asgp.2017.001
语种：English
出版社：Polskie Towarzystwo Geologiczne
摘要：In this article, the most recent moldavite discoveries in Poland and their host sediments are characterised and discussed. They were discovered at Lasów, located about 8 km north of Zgorzelec (Poland) and Görlitz(Germany), about 700 m from the Polish-German border, close to the Lusatian Neisse (Nysa) River. The tektiteswere collected from Vistulian (Wiechselian) glacial age sand and gravel of a closed quarry pit, associated with theriver terraces. In the Lasów area, the moldavite-bearing sediments are Pleistocene in age and represent LusatianNeisse terrace deposits. They were redeposited from the upper part of the drainage basin of the Lusatian Neisse,probably washed out from the Miocene sediments that filled the Zittau Depression, the Berzdorf–RadomierzyceDepression, the Višòová Depression and the tectonically uplifted Izera Mts. and Dzia³oszyn Depression. Theerosion of Miocene deposit occured on a large scale in the uplifted foothills of the Upper Miocene Izera, Lusatiaand Kaczawa complexes. The sediment cover was removed from the Dzia³oszyn Depression. The drainage basinof the Lusatian Neisse is the area where moldavites were formed by the Nördlinger Ries impact. The source area ofmoldavite is the same for the Miocene deposits around Gozdnica, as well as for the Pleistocene sediments atLasów.
关键词：Polish tektites; redeposition; river terrace; Miocene; Pleistocene; drainage basin