"50" . "0139-8172" . . . "V\u00FDsledky pokusn\u00E9ho v\u00FDpalu granitoidn\u00ED horniny ze Sudom\u011B\u0159ic u T\u00E1bora: od geochronologie k historick\u00E9 keramice" . "Vzorek prevarisk\u00E9ho granitoidu ze Sudom\u011B\u0159ic u T\u00E1bora byl vyp\u00E1len v keramick\u00E9 peci na 700 \u00B0C. F\u00E1zov\u00E9 zm\u011Bny zahrnuj\u00ED v podstat\u011B jen dehydrataci j\u00EDlov\u00FDch miner\u00E1l\u016F a hydroxid\u016F Fe, kter\u00E9 byly soust\u0159ed\u011Bny hlavn\u011B na hranic\u00EDch zrn a tvo\u0159ily lemy kolem monazitu (jeden z projev\u016F radioaktivity). Uvoln\u011Bn\u00ED t\u00E9to vody v bezprost\u0159edn\u00ED bl\u00EDzkosti monazitu p\u0159i zah\u0159\u00E1t\u00ED je jedn\u00EDm z d\u016Fvod\u016F, pro\u010D jsou prevarisk\u00E1 st\u00E1\u0159\u00ED monazitu v moldanubiku jen z\u0159\u00EDdka zachov\u00E1na. Hematit vznikl\u00FD p\u0159i v\u00FDpalu zv\u00FDraz\u0148uje hranice zrn a makroskopicky d\u00E1v\u00E1 hornin\u011B r\u016F\u017Eovou barvu. Biotit je ve vyp\u00E1len\u00E9m vzorku v mikroskopu tmav\u0161\u00ED a m\u00E9n\u011B homogenn\u00ED, nicm\u00E9n\u011B je\u0161t\u011B bez probl\u00E9m\u016F identifikovateln\u00FD a p\u0159em\u011Bna na jin\u00E9 f\u00E1ze nen\u00ED v mikroskopu prokazateln\u00E1. Kolem zrn gran\u00E1tu se \u010Dasto vytvo\u0159ily pom\u011Brn\u011B \u0161irok\u00E9 a pravideln\u00E9 mezery, snad v d\u016Fsledku smr\u0161t\u011Bn\u00ED okol\u00ED. Ji\u017E na po\u010D\u00E1tku pom\u011Brn\u011B vysok\u00E1 magnetick\u00E1 susceptibilita horniny se d\u00E1le zv\u00FD\u0161ila v\u00FDpalem."@cs . . . . . "Sborn\u00EDk Jiho\u010Desk\u00E9ho muzea v \u010Cesk\u00FDch Bud\u011Bjovic\u00EDch, P\u0159\u00EDrodn\u00ED v\u011Bdy" . "1"^^ . "1" . "297367" . "1"^^ . . . "Proch\u00E1zka, V\u00E1clav" . . "Z(MSM6046137302)" . "5"^^ . "V\u00FDsledky pokusn\u00E9ho v\u00FDpalu granitoidn\u00ED horniny ze Sudom\u011B\u0159ic u T\u00E1bora: od geochronologie k historick\u00E9 keramice"@cs . "[BA400AD408B8]" . "Results of experimental heating of a granitoid from Sudom\u011B\u0159ice at T\u00E1bor: from geochronology to historical ceramics"@en . "burnout; dehydration; optical properties; historical ceramics; monazite"@en . . . "V\u00FDsledky pokusn\u00E9ho v\u00FDpalu granitoidn\u00ED horniny ze Sudom\u011B\u0159ic u T\u00E1bora: od geochronologie k historick\u00E9 keramice" . . "V\u00FDsledky pokusn\u00E9ho v\u00FDpalu granitoidn\u00ED horniny ze Sudom\u011B\u0159ic u T\u00E1bora: od geochronologie k historick\u00E9 keramice"@cs . "CZ - \u010Cesk\u00E1 republika" . . "RIV/60461373:22310/10:00023012" . . . "Results of experimental heating of a granitoid from Sudom\u011B\u0159ice at T\u00E1bor: from geochronology to historical ceramics"@en . "RIV/60461373:22310/10:00023012!RIV11-MSM-22310___" . . "Vzorek prevarisk\u00E9ho granitoidu ze Sudom\u011B\u0159ic u T\u00E1bora byl vyp\u00E1len v keramick\u00E9 peci na 700 \u00B0C. F\u00E1zov\u00E9 zm\u011Bny zahrnuj\u00ED v podstat\u011B jen dehydrataci j\u00EDlov\u00FDch miner\u00E1l\u016F a hydroxid\u016F Fe, kter\u00E9 byly soust\u0159ed\u011Bny hlavn\u011B na hranic\u00EDch zrn a tvo\u0159ily lemy kolem monazitu (jeden z projev\u016F radioaktivity). Uvoln\u011Bn\u00ED t\u00E9to vody v bezprost\u0159edn\u00ED bl\u00EDzkosti monazitu p\u0159i zah\u0159\u00E1t\u00ED je jedn\u00EDm z d\u016Fvod\u016F, pro\u010D jsou prevarisk\u00E1 st\u00E1\u0159\u00ED monazitu v moldanubiku jen z\u0159\u00EDdka zachov\u00E1na. Hematit vznikl\u00FD p\u0159i v\u00FDpalu zv\u00FDraz\u0148uje hranice zrn a makroskopicky d\u00E1v\u00E1 hornin\u011B r\u016F\u017Eovou barvu. Biotit je ve vyp\u00E1len\u00E9m vzorku v mikroskopu tmav\u0161\u00ED a m\u00E9n\u011B homogenn\u00ED, nicm\u00E9n\u011B je\u0161t\u011B bez probl\u00E9m\u016F identifikovateln\u00FD a p\u0159em\u011Bna na jin\u00E9 f\u00E1ze nen\u00ED v mikroskopu prokazateln\u00E1. Kolem zrn gran\u00E1tu se \u010Dasto vytvo\u0159ily pom\u011Brn\u011B \u0161irok\u00E9 a pravideln\u00E9 mezery, snad v d\u016Fsledku smr\u0161t\u011Bn\u00ED okol\u00ED. Ji\u017E na po\u010D\u00E1tku pom\u011Brn\u011B vysok\u00E1 magnetick\u00E1 susceptibilita horniny se d\u00E1le zv\u00FD\u0161ila v\u00FDpalem." . "Sample of a pre-Variscan granitoid from Sudom\u011B\u0159ice near T\u00E1bor was burned at 700 \u00B0C for 10 hours in a ceramic furnace. The only relevant phase change is the dehydration of clay minerals and Fe-hydroxides, which had been originally present mainly at grain boundaries and also formed aureoles around monazite (due to radiation damage). Corrosion of monazite by the water liberated from low-temperature phases is observed. This partly explains why pre-Variscan monazite ages have been only rarely preserved in Moldanubicum. Hematite formed at heating highlights the grain boundaries and is responsible for pink macroscopic coloration of the rock. Biotite is darker and less homogeneous in the burnt sample, however, its alteration to other phases cannot be proved by microscopic observation. The garnet is often rimmed by relatively wide empty space, which is perhaps a consequence of contraction of the surroundings. The relatively high magnetic susceptibility of the original rock has been enhanced by the bur"@en . "22310" . .