{"id":1510,"date":"2020-04-18T09:00:00","date_gmt":"2020-04-18T07:00:00","guid":{"rendered":"https:\/\/beta.svetkamene.eu\/?p=1510"},"modified":"2021-04-27T13:12:39","modified_gmt":"2021-04-27T11:12:39","slug":"szlakiem-kamieniarzy-na-ricansku-czesc-2-b-kamieniolom-zernovka","status":"publish","type":"post","link":"https:\/\/svetkamene.eu\/index.php\/pl\/2020\/04\/18\/szlakiem-kamieniarzy-na-ricansku-czesc-2-b-kamieniolom-zernovka\/","title":{"rendered":"\u015aladem kamieniarzy na \u0158\u00ed\u010dansku – Kamienio\u0142om \u017dernovka, cz\u0119\u015b\u0107 2"},"content":{"rendered":"\n

Pluton \u0158\u00ed\u010dany tworzy bry\u0142\u0119 o mniej wi\u0119cej eliptycznym przekroju
(13 \u00d7 9 km). Jak ju\u017c pokaza\u0142 Katzer (1888), sk\u0142ada si\u0119 on g\u0142\u00f3wnie z dw\u00f3ch koncentrycznie u\u0142o\u017conych podstawowych magmowych facji \u2013 zewn\u0119trznej, bogatej w fenokryszta\u0142y i wewn\u0119trznej, z ich niewielk\u0105 liczb\u0105. Ich kontakt nie zosta\u0142 odkryty, ale prawdopodobnie jest stopniowy, powolny. R\u00f3wnie\u017c r\u00f3\u017cnice w sk\u0142adzie modalnym i zawarto\u015bci g\u0142\u00f3wnych element\u00f3w s\u0105 minimalne. Nowe datowanie cyrkonu w U-Pb potwierdza, \u017ce \u200b\u200bobie facje introdukowa\u0142y si\u0119 w tym samym czasie, oko\u0142o 337 milion\u00f3w lat temu (Trubac i in., w druku). \u015arodkowa cz\u0119\u015b\u0107 cia\u0142a zosta\u0142a pokonana przez m\u0142odsz\u0105, teraz s\u0142abo ods\u0142oni\u0119t\u0105, intruzj\u0119 drobnoziarnistego leukogranitu z dw\u00f3ch mik, tak zwanego typu jewanskiego, a po\u0142udniowa kraw\u0119d\u017a plutonu jest otoczona przez szerok\u0105 oko\u0142o 1 km stref\u0119 licznych \u017cy\u0142 pegmatyt\u00f3w mikrogranit\u00f3w i aplit\u00f3w ze znacznym wzbogaceniem boru, cyny, niobu i tantalu.<\/p>\n\n\n\n

Zachodnie kontakty plutonu \u0158\u00ed\u010dany z neoproterozoicznymi i kambryjskimi metasedymentami obszaru Tepla-Barrandium s\u0105 intruzyjne, z wyra\u017an\u0105 metamorfoz\u0105 kontaktow\u0105. Wschodni kraniec pokryty jest permokarbo\u0144skimi sedymentami, kt\u00f3rych zlepie\u0144ce zasadowe zawieraj\u0105 otoczaki granitu \u0158\u00ed\u010dany. Jak zobaczymy w kamienio\u0142omie \u017dernovka, centralna facja plutonu \u0158\u00ed\u010dany charakteryzuje si\u0119 wyst\u0119powaniem du\u017cych maficznych enklaw mikrogranularnych, kt\u00f3re s\u0105 hybrydowe, bogate w potas i wykazuj\u0105 inne pokrewie\u0144stwo z magm\u0105 durbachityczn\u0105. Cz\u0119sto s\u0105 one zwi\u0105zane z uderzaj\u0105cymi nagromadzeniami skalenii potasowych K. To powi\u0105zanie wskazuje na z\u0142o\u017cone interakcje mi\u0119dzy zasadow\u0105 i kwa\u015bn\u0105 magm\u0105, a tak\u017ce prawie zestalony skale\u0144 K kumuluje si\u0119, prawdopodobnie w kilku etapach.<\/p>\n\n\n\n

\"\"
Obrazek 1: <\/strong>
a – Pozycja \u015brodkowo-czeskiego kompleksu plutonicznego (SPK) w Czeskim masywie Schemat <\/em>
b – SPK i jego podzia\u0142 na magmowe suity.
c – Szkic geologiczny plutonu \u0158\u00ed\u010dany z pozycj\u0105 opisanego kamienio\u0142omu \u017dernovka (Janou\u0161ek i in., 2014).<\/em><\/figcaption><\/figure>\n\n\n\n
<\/div>\n\n\n\n

Dla \u015awiata kamienia dostarczone przez autor\u00f3w:
Barbora Dud\u00edkov\u00e1 Schulmannov\u00e1, Vojt\u011bch Janou\u0161ek, Tom\u00e1\u0161 Navr\u00e1til,
V\u00e1clav Ryba\u0159\u00edk i Pavel Vla\u0161\u00edmsk\u00fd<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"

Pluton \u0158\u00ed\u010dany tworzy bry\u0142\u0119 o mniej wi\u0119cej eliptycznym przekroju (13 \u00d7 9 km). Jak ju\u017c pokaza\u0142…<\/p>\n","protected":false},"author":1,"featured_media":1508,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"ngg_post_thumbnail":0},"categories":[338,374],"tags":[],"yoast_head":"\n\u015aladem kamieniarzy na \u0158\u00ed\u010dansku - Kamienio\u0142om \u017dernovka, cz\u0119\u015b\u0107 2 - Sv\u011bt Kamene<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/svetkamene.eu\/index.php\/pl\/2020\/04\/18\/szlakiem-kamieniarzy-na-ricansku-czesc-2-b-kamieniolom-zernovka\/\" \/>\n<meta property=\"og:locale\" content=\"cs_CZ\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u015aladem kamieniarzy na \u0158\u00ed\u010dansku - Kamienio\u0142om \u017dernovka, cz\u0119\u015b\u0107 2 - Sv\u011bt Kamene\" \/>\n<meta property=\"og:description\" content=\"Pluton \u0158\u00ed\u010dany tworzy bry\u0142\u0119 o mniej wi\u0119cej eliptycznym przekroju (13 \u00d7 9 km). 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