{"id":2974,"date":"2022-05-04T10:41:41","date_gmt":"2022-05-04T08:41:41","guid":{"rendered":"https:\/\/kmplg.sk\/?p=2974"},"modified":"2023-07-30T21:06:49","modified_gmt":"2023-07-30T19:06:49","slug":"novy-mineral-parahibbingit","status":"publish","type":"post","link":"https:\/\/kmplg.sk\/?p=2974","title":{"rendered":"Bol schv\u00e1len\u00fd nov\u00fd miner\u00e1l parahibbingit"},"content":{"rendered":"\n

Nov\u00fd miner\u00e1l parahibbingit <\/strong>s Bushveldsk\u00e9ho komplexu (JAR) op\u00edsan\u00fd prof. Petrom Kod\u011brom, PhD a kolegami bol schv\u00e1len\u00fd IMA (Medzin\u00e1rodnou Mineralogickou Asoci\u00e1ciou).<\/p>\n\n\n\n

Publik\u00e1cia s n\u00e1zvom:<\/p>\n\n\n\n

Ferrous hydroxychlorides hibbingite (\u03b3-Fe2(OH)3Cl) and parahibbingite (\u03b2-Fe2(OH)3Cl) as a <\/strong>1 concealed sink of Cl and H2O in ultrabasic and granitic systems<\/strong><\/span><\/p>\n\n\n\n

American Mineralogist 2022, Vol. 7, 826-841 – Link<\/a><\/p>\n\n\n\n

Peter Kod\u011bra<\/strong>, Juraj Majzlan, Kilian Pollok, Stefan Kiefer, Franti\u0161ek \u0160imko, Eva Scholtzov\u00e1, Jarmila Lupt\u00e1kov\u00e1 a Grant Cawthorn<\/p>\n\n\n\n

Publik\u00e1cia prin\u00e1\u0161a mineralogick\u00fa charakteristiku \u017eeleznat\u00fdch hydroxychloridov, o ktor\u00fdch predpoklad\u00e1me, \u017ee s\u00fa geochemicky ve\u013emi v\u00fdznamn\u00e9 miner\u00e1ly. S\u00fa v\u0161ak ve\u013emi zriedkavo popisovan\u00e9 v d\u00f4sledku ich extr\u00e9mnej citlivosti na oxid\u00e1ciu a hydrat\u00e1ciu pri kontakte so vzduchom. Potvrden\u00e1 bola pr\u00edtomnos\u0165 dvoch chemicky identick\u00fdch, ale \u0161trukt\u00farne odli\u0161n\u00fdch modifik\u00e1ci\u00ed \u017eeleznat\u00fdch hydroxychloridov. Ortorombick\u00e1 modifik\u00e1cia bola u\u017e sk\u00f4r zn\u00e1ma ako miner\u00e1l hibbingit, ktor\u00fd bol zisten\u00fd napr\u00edklad v inkl\u00fazi\u00e1ch hor\u00facich slan\u00fdch roztokov a so\u013en\u00fdch taven\u00edn magmatick\u00e9ho p\u00f4vodu. Trigon\u00e1lnu modifik\u00e1ciu poznali dosia\u013e len chemici a archeol\u00f3govia, ako produkt kor\u00f3zie \u017eeleza v slanej vode bez pr\u00edstupu kysl\u00edka, pri\u010dom v tejto pr\u00e1ci ho opisujeme ako nov\u00fd miner\u00e1l parahibbingit. Opisujeme tie\u017e ramanove spektr\u00e1, ktor\u00e9 umo\u017enia r\u00fdchlo a jednoducho rozl\u00ed\u0161\u00ed\u0165 obe modifik\u00e1cie. V\u010faka spolupr\u00e1ci s profesorom z Johanessburgu sme parahibbingit objavili v ultrab\u00e1zickej hornine z Ju\u017enej Afriky, kde reprezentuje produkt hydroterm\u00e1lnej premeny horninotvorn\u00fdch miner\u00e1lov. V\u00fdznam objavu pod\u010diarkuje to, \u017ee opisovan\u00fd miner\u00e1l m\u00f4\u017ee reprezentova\u0165 dosia\u013e nepoznan\u00fa f\u00e1zu, ktor\u00e1 umo\u017e\u0148uje akumulova\u0165 v\u00fdznamn\u00e9 mno\u017estv\u00e1 vody a chl\u00f3ru v ultrab\u00e1zick\u00fdch a b\u00e1zick\u00fdch hornin\u00e1ch a pri subdukcii litosf\u00e9rick\u00fdch dosiek sa m\u00f4\u017eu tieto miner\u00e1ly podie\u013ea\u0165 na transporte Cl a vody do hlb\u0161\u00edch \u010dast\u00ed Zeme. Tieto miner\u00e1lne f\u00e1zy v\u0161ak dosia\u013e unikali pozornosti v d\u00f4sledku ich nestability v oxida\u010dnej atmosf\u00e9re.<\/p>\n\n\n\n

\"\"
Hibbingit (Hib) a parahibbingit v obr\u00e1zkoch skenovacom elektr\u00f3novom mikroskope (Phb). A. Hibbingit v rozrezanej inkl\u00fazii so\u013enej taveniny (Biely Vrch, Slovensko). B. Parahibbingit vo vzorke pyroxenitu z Bushveldsk\u00e9ho komplexu (JAR)<\/figcaption><\/figure><\/div>\n\n\n\n

Predlo\u017een\u00e1 pr\u00e1ca je so s\u00e9rie pr\u00e1c, ktor\u00e9 vznikli v podstate ako sekund\u00e1rne v\u00fdstupy pri \u0161t\u00fadiu pr\u00edrodn\u00fdch so\u013en\u00fdch taven\u00edn. So\u013en\u00e9 taveniny boli objaven\u00e9 Petrom Kod\u011brom pri \u0161t\u00fadiu procesov ved\u00facich k vzniku lo\u017e\u00edsk zlata na Slovensku. Petrovi sa podarilo zostavi\u0165 medzin\u00e1rodn\u00fd t\u00edm odborn\u00edkov, ktor\u00fd pod jeho veden\u00edm objavil a op\u00edsal nov\u00fd miner\u00e1l \u2013 parahibbingit. Za posledn\u00fdch 5 rokov je to u\u017e jeho druh\u00fd novo objaven\u00fd miner\u00e1l. Parahibbingit je \u017eeleznat\u00fd hydroxychlorid, ktor\u00fd bol v\u010faka spolupr\u00e1ci s profesorom Cawthornom z Johanessburgu objaven\u00fd ultrab\u00e1zickej hornine z Ju\u017enej Afriky pri h\u013eadan\u00ed analogick\u00e9ho miner\u00e1lu zo so\u013en\u00fdch tavenin. V\u00fdznam objavu pod\u010diarkuje to, \u017ee opisovan\u00fd miner\u00e1l m\u00f4\u017ee reprezentova\u0165 dosia\u013e nepoznan\u00fa f\u00e1zu, ktor\u00e1 umo\u017e\u0148uje akumulova\u0165 v\u00fdznamn\u00e9 mno\u017estv\u00e1 vody a chl\u00f3ru v ultrab\u00e1zick\u00fdch a b\u00e1zick\u00fdch hornin\u00e1ch a pri subdukcii litosf\u00e9rick\u00fdch dosiek sa m\u00f4\u017eu tieto miner\u00e1ly podie\u013ea\u0165 na transporte Cl a vody do hlb\u0161\u00edch \u010dast\u00ed Zeme. Tieto miner\u00e1lne f\u00e1zy v\u0161ak dosia\u013e unikali pozornosti v d\u00f4sledku ich nestability pri kontakte so vzduchom.<\/p>\n\n\n\n

<\/p>\n","protected":false},"excerpt":{"rendered":"

Nov\u00fd miner\u00e1l parahibbingit s Bushveldsk\u00e9ho komplexu (JAR) op\u00edsan\u00fd prof. 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