{"id":3972,"date":"2021-11-07T14:39:30","date_gmt":"2021-11-07T13:39:30","guid":{"rendered":"http:\/\/tom-stehule.com\/?p=3972"},"modified":"2023-03-17T16:30:22","modified_gmt":"2023-03-17T15:30:22","slug":"jedna-ze-zahad-pouste-atacama-vyresena","status":"publish","type":"post","link":"https:\/\/tom-stehule.com\/es\/2021\/11\/07\/jedna-ze-zahad-pouste-atacama-vyresena\/","title":{"rendered":"Se resuelve uno de los misterios del desierto de Atacama"},"content":{"rendered":"

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Asi p\u0159ed deseti lety v\u011bdci obr\u00e1tili svou pozornost na z\u00e1hadn\u00fd 75 km dlouh\u00fd pruh v pou\u0161ti Atacama v Chile, kter\u00fd je pokryt\u00fd fragmenty roztaven\u00e9ho skla.\u00a0<\/b>Mezin\u00e1rodn\u00ed skupina v\u00fdzkumn\u00edk\u016f zjistila, \u017ee jeho p\u016fvod je v explozi komety p\u0159ed 12 000 lety.<\/b><\/p>\r\n

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Tajemstv\u00ed, obklopuj\u00edc\u00ed intenzivn\u00ed teplo, kter\u00e9 sp\u00e1lilo p\u00eds\u010ditou p\u016fdu oblasti na k\u0159emi\u010dit\u00e9 sklen\u011bn\u00e9 desky, bylo pr\u00e1v\u011b objasn\u011bno studi\u00ed americk\u00fdch v\u011bdc\u016f a Chile a publikov\u00e1no 2. listopadu 2021 v \u010dasopise Geology.<\/span><\/p>\r\n

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Podle autor\u016f bylo extr\u00e9mn\u00ed teplo, kter\u00e9 vyvolalo tento jev, zp\u016fsobeno kometou, kter\u00e1 explodovala asi p\u0159ed 12 000 lety – tedy na konci pleistoc\u00e9nu – t\u011bsn\u011b nad touto oblast\u00ed. Zkroucen\u00e9, ohnut\u00e9 k\u0159emi\u010dit\u00e9 sklen\u011bn\u00e9 st\u0159epy jsou a\u017e do \u0161\u00ed\u0159ky 50 cm <\/span>\u201esoust\u0159ed\u011bn\u00e9 v ur\u010dit\u00fdch oblastech pou\u0161t\u011b Atacama pobl\u00ed\u017e Pica, a nazna\u010duj\u00ed t\u00e9m\u011b\u0159 sou\u010dasn\u00e9 a intenzivn\u00ed v\u00fdbuchy ve vzduchu pobl\u00ed\u017e zemsk\u00e9ho povrchu,<\/span><\/i>\u201c uv\u00e1d\u00ed \u010dl\u00e1nek ve zm\u00edn\u011bn\u00e9m \u010dasopisu.<\/span><\/p>\r\n

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V\u011bdci ve sv\u00e9 studii poukazuj\u00ed na to, \u017ee vzorky pou\u0161tn\u00edho skla obsahuj\u00ed mal\u00e9 fragmenty miner\u00e1l\u016f, kter\u00e9 se \u010dasto vyskytuj\u00ed ve skal\u00e1ch mimozemsk\u00e9ho p\u016fvodu. Tyto se shoduj\u00ed se slo\u017een\u00edm materi\u00e1lu p\u0159inesen\u00e9ho na Zemi mis\u00ed Stardust NASA, kter\u00e1 odebrala vzorky \u010d\u00e1stic z komety zvan\u00e9 Wild 2, co\u017e vypl\u00fdv\u00e1 z prohl\u00e1\u0161en\u00ed, vydan\u00e9ho Brownovou Universitou (USA), kter\u00e1 se z\u00fa\u010dastnila v\u00fdzkumu.<\/span><\/p>\r\n

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P.H. Schultz \/ Brown University<\/figcaption>\r\n<\/figure>\r\n<\/div>\r\n

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V\u011bdci nazna\u010duj\u00ed, \u017ee tyto miner\u00e1ly padly do pou\u0161t\u011b po v\u00fdbuchu komety, co\u017e\u00a0 roztavilo jej\u00ed p\u00eds\u010dit\u00fd povrch.<\/span><\/p>\r\n

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\u201eJe to poprv\u00e9, co m\u00e1me na Zemi jasn\u00fd d\u016fkaz skla, kter\u00fd byl generov\u00e1n tepeln\u00fdm z\u00e1\u0159en\u00edm, a vlivem ohniv\u00e9 koule, je\u017e explodovala t\u011bsn\u011b nad zemsk\u00fdm povrchem,\u201c <\/span><\/i>zd\u016fraznil <\/span>Pete Schultz<\/b>, emeritn\u00ed profesor z Katedry Zem\u011b, \u017eivotn\u00edho prost\u0159ed\u00ed a planet\u00e1ria Americk\u00e9 univerzity.<\/span><\/p>\r\n

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\u201eMnoho z n\u00e1s vid\u011blo ohniv\u00e9 koule z padaj\u00edc\u00edch asteroid\u016f, ale ve srovn\u00e1n\u00ed s t\u00edm jsou to mal\u00e9 body,\u201c<\/span><\/i> \u0159ekl v\u011bdec, kter\u00fd zahodil p\u0159edchoz\u00ed hypot\u00e9zy, \u017ee sklen\u011bn\u00e9 fragmenty byly v\u00fdsledkem starov\u011bk\u00fdch pastvinov\u00fdch oh\u0148\u016f, proto\u017ee region nebyl v\u017edy pou\u0161t\u00ed.<\/span><\/p>\r\n

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Podrobn\u00e1 chemick\u00e1 anal\u00fdza des\u00edtek vzork\u016f, odebran\u00fdch ze sklen\u011bn\u00fdch lo\u017eisek v cel\u00e9m regionu, proveden\u00e1 spole\u010dn\u011b s v\u011bdeck\u00fdm st\u0159ediskem US Fernbank a Univerzitou Santo Tom\u00e1s, a chilskou geologickou a t\u011b\u017eebn\u00ed slu\u017ebou, zjistila, \u017ee miner\u00e1ly, zvan\u00e9 zirkony, byly tepeln\u011b rozlo\u017eeny na jin\u00fd miner\u00e1l zvan\u00fd baddeleyit.<\/span><\/p>\r\n

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K t\u00e9to transformaci z jednoho miner\u00e1lu na druh\u00fd obvykle doch\u00e1z\u00ed p\u0159i teplot\u00e1ch nad 1650 stup\u0148\u016f Celsia, co\u017e je mnohem vy\u0161\u0161\u00ed \u00farove\u0148 tepla, ne\u017e by mohlo doj\u00edt p\u0159i tradi\u010dn\u00edm spalov\u00e1n\u00ed pastvin, vysv\u011btlil Schultz.<\/span><\/p>\r\n

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[1] Cient\u00edficos resuelven el misterio de una extensa zona del desierto de Atacama cubierta por vidrios fundidos. 03.11.2021. Online: <\/span>https:\/\/actualidad.rt.com\/actualidad\/409162-cientificos-descubren-misterio-cometa-vidrio-atacama<\/span><\/a><\/p>\r\n

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Hace aproximadamente una d\u00e9cada, los cient\u00edficos centraron su atenci\u00f3n en una misteriosa franja de 75 kil\u00f3metros de largo en el desierto chileno de Atacama que est\u00e1 cubierta de fragmentos de vidrio fundido. Un equipo internacional de investigadores descubri\u00f3 que sus or\u00edgenes se remontan a la explosi\u00f3n de un cometa hace 12.000 a\u00f1os.<\/p>\n","protected":false},"author":1,"featured_media":3973,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"colormag_page_container_layout":"default_layout","colormag_page_sidebar_layout":"default_layout","_exactmetrics_skip_tracking":false,"__cvm_playback_settings":[],"__cvm_video_id":"","footnotes":""},"categories":[32],"tags":[63,5,43],"class_list":["post-3972","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-zahady","tag-chile","tag-jizni-amerika","tag-zahady"],"translation":{"provider":"WPGlobus","version":"3.0.6","language":"es","enabled_languages":["cz","es"],"languages":{"cz":{"title":true,"content":true,"excerpt":true},"es":{"title":true,"content":false,"excerpt":true}}},"_links":{"self":[{"href":"https:\/\/tom-stehule.com\/es\/wp-json\/wp\/v2\/posts\/3972","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/tom-stehule.com\/es\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/tom-stehule.com\/es\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/tom-stehule.com\/es\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/tom-stehule.com\/es\/wp-json\/wp\/v2\/comments?post=3972"}],"version-history":[{"count":3,"href":"https:\/\/tom-stehule.com\/es\/wp-json\/wp\/v2\/posts\/3972\/revisions"}],"predecessor-version":[{"id":4650,"href":"https:\/\/tom-stehule.com\/es\/wp-json\/wp\/v2\/posts\/3972\/revisions\/4650"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/tom-stehule.com\/es\/wp-json\/wp\/v2\/media\/3973"}],"wp:attachment":[{"href":"https:\/\/tom-stehule.com\/es\/wp-json\/wp\/v2\/media?parent=3972"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/tom-stehule.com\/es\/wp-json\/wp\/v2\/categories?post=3972"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/tom-stehule.com\/es\/wp-json\/wp\/v2\/tags?post=3972"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}