{"id":1527,"date":"2020-04-25T10:00:00","date_gmt":"2020-04-25T08:00:00","guid":{"rendered":"https:\/\/beta.svetkamene.eu\/?p=1527"},"modified":"2021-04-27T16:25:36","modified_gmt":"2021-04-27T14:25:36","slug":"stonemasonry-in-the-ricany-region-part-2-c-zernovka-quarry","status":"publish","type":"post","link":"https:\/\/svetkamene.eu\/index.php\/en\/2020\/04\/25\/stonemasonry-in-the-ricany-region-part-2-c-zernovka-quarry\/","title":{"rendered":"Stonemasonry in the \u0158\u00ed\u010dany Region &#8211; \u017dernovka Quarry, Part 3"},"content":{"rendered":"\n<p>An interesting feature of the \u017dernovka Quarry \u0158\u00ed\u010dany Pluton is that it is reverse-zonal. In most concentric zonal plutons solidifying homogeneously from the edges to the centre the more fractionated products of magma crystallization (i.e. richer in SiO<sub>2<\/sub> and incompatible elements, and without compatible elements) can be found in the centre of the intrusion. However, the \u0158\u00ed\u010dany Pluton has been formed the other way round \u2013 it shows a&nbsp;decrease in SiO<sub>2<\/sub> and Rb, and an increase in Al<sub>2<\/sub>O<sub>3<\/sub>, K<sub>2<\/sub>O, Na<sub>2<\/sub>O, CaO, Ba, Sr, Zr, Th, Ti, and P towards the centre. This presumably reflects the processes of placement from a&nbsp;hypothetical deeper magma chamber that showed a&nbsp;horizontal stratification due to fractional crystallization and accumulation of predominantly K-feldspar. Gravimetric data indicate that the \u0158\u00ed\u010dany granite plug can be traced more than 14 km below the surface, where it merges with a&nbsp;large negative gravimetric anomaly extending all the way to Kutn\u00e1 Hora, and is interpreted as a&nbsp;signal of a&nbsp;hypothetical \u0158\u00ed\u010dany-Kutn\u00e1 Hora batolite. The current petrogenetic model of the \u0158\u00ed\u010dany Pluton presupposes a&nbsp;partial melting of metasediments (metadrob), fractional crystallization of granitic magma, and a&nbsp;thermal reactivation of potassium feldspar cumulates by injections of basic melts. The resulting magma then intruded into higher crust layers.<\/p>\n\n\n\n<p>Another curiosity is a&nbsp;supposed mechanism of the placement of the \u0158\u00ed\u010dany Pluton from a&nbsp;deeper magma chamber. A&nbsp;new model of a&nbsp;spiral (helical) flow through a&nbsp;vertical cylindrical canal has been proposed on the basis of a&nbsp;structural analysis and an analysis of the anisotropy of magmatic susceptibility. The canal then presumably solidified to form the present-day \u0158\u00ed\u010dany Pluton.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" width=\"1024\" height=\"579\" src=\"https:\/\/beta.svetkamene.eu\/wp-content\/uploads\/2020\/06\/model_umisteni_ricanskeho_plutonu-2-1024x579.png\" alt=\"\" class=\"wp-image-1528\" srcset=\"https:\/\/svetkamene.eu\/wp-content\/uploads\/2020\/06\/model_umisteni_ricanskeho_plutonu-2-1024x579.png 1024w, https:\/\/svetkamene.eu\/wp-content\/uploads\/2020\/06\/model_umisteni_ricanskeho_plutonu-2-300x170.png 300w, https:\/\/svetkamene.eu\/wp-content\/uploads\/2020\/06\/model_umisteni_ricanskeho_plutonu-2-768x434.png 768w, https:\/\/svetkamene.eu\/wp-content\/uploads\/2020\/06\/model_umisteni_ricanskeho_plutonu-2.png 1105w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><figcaption> <em>Figure 2: A&nbsp;model of the \u0158\u00ed\u010dany Pluton placement. The central facie, which is low in phenocryst, flows vertically and more quickly, whilst the peripheral facie, which is rich in phenocryst, flows spirally (helically) and more slowly. According to Truba\u010d et al. (2015). <\/em><\/figcaption><\/figure>\n\n\n\n<div style=\"height:20px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p>Southeast of \u017dernovka Quarry on Doubeck\u00e1 Street we come across board no. 7 of the Nature Trail Muka\u0159ov \u2013 \u017dernovka. The text taken over from the local chronicle describes the stonemason\u2019s hard life and work. The name of the place itself suggests (\u017eernov \u2013 millstone) that it was a&nbsp;home to people who made millstones, and who broke and worked stones in general. In every family at least one family member was a&nbsp;stonemason. Although they worked around 7 hours a&nbsp;day in winter and up to 9 hours a&nbsp;day in summer and often suffered from silicosis, the stonemasons lived to a&nbsp;quite old age \u2013 up to 70. The chronicle also states that <em>\u201c[i]n quarries accidents often happen when blasting stone. Before the war the masons used to go to Saxony for better earnings. Despite their hard life, stonemasons like to make merry, and they like to sing while working. <strong>However, drinking is a&nbsp;bad habit<\/strong>\u2026\u201d<\/em><\/p>\n\n\n\n<div style=\"height:100px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p><em>For World of Stone provided by authors:<br>Barbora Dud\u00edkov\u00e1 Schulmannov\u00e1, Vojt\u011bch Janou\u0161ek, Tom\u00e1\u0161 Navr\u00e1til, <br>V\u00e1clav Ryba\u0159\u00edk and Pavel Vla\u0161\u00edmsk\u00fd<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"<p>An interesting feature of the \u017dernovka Quarry \u0158\u00ed\u010dany Pluton is that it is reverse-zonal. In&#8230;<\/p>\n","protected":false},"author":1,"featured_media":1521,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"ngg_post_thumbnail":0},"categories":[376,340],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v19.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Stonemasonry in the \u0158\u00ed\u010dany Region - \u017dernovka Quarry, Part 3 - 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\/en\/2020\/04\/25\/stonemasonry-in-the-ricany-region-part-2-c-zernovka-quarry\/\" \/>\n<meta property=\"og:locale\" content=\"cs_CZ\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Stonemasonry in the \u0158\u00ed\u010dany Region - \u017dernovka Quarry, Part 3 - Sv\u011bt Kamene\" \/>\n<meta property=\"og:description\" content=\"An interesting feature of the \u017dernovka Quarry \u0158\u00ed\u010dany Pluton is that it is reverse-zonal. 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