Počet záznamů: 1
Porosity changes induced by salt weathering of sandstones, Bohemian Cretaceous Basin, Czech Republic
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SYSNO ASEP 0359012 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Porosity changes induced by salt weathering of sandstones, Bohemian Cretaceous Basin, Czech Republic Tvůrce(i) Adamovič, Jiří (GLU-S) RID, SAI, ORCID
Mikuláš, Radek (GLU-S) RID, SAI
Schweigstillová, Jana (USMH-B) RID, ORCID, SAI
Böhmová, Vlasta (GLU-S) RID, SAIZdroj.dok. Acta geodynamica et geomaterialia. - : Ústav struktury a mechaniky hornin AV ČR, v. v. i. - ISSN 1214-9705
Roč. 8, č. 1 (2011), s. 29-45Poč.str. 17 s. Forma vydání WWW - WWW Jazyk dok. eng - angličtina Země vyd. CZ - Česká republika Klíč. slova porosity ; sandstone ; rock crust ; salt weathering ; case hardening ; honeycombs Vědní obor RIV DB - Geologie a mineralogie CEP IAA300130806 GA AV ČR - Akademie věd CEZ AV0Z30130516 - GLU-S (2005-2011) AV0Z30460519 - USMH-B (2005-2011) UT WOS 000290696600003 EID SCOPUS 79954545821 Anotace Pore parameters of weathered and non-weathered sandstones were determined using mercury intrusion porosimetry. Two types of rock crusts were distinguished on morphological basis: 1. patterned rock crusts with a variety of weathering forms (honeycombs, wandkarren), and 2. armoured rock crusts with a relatively smooth, hardened layer. Patterned rock crusts show an increase in the size of macropores relative to unweathered sandstone, which implies an increase in total effective porosity. This is explained by the subflorescent growth of salt crystals. Armoured rock crusts on fine-grained sandstone show a reduced volume and size of macropores, as these are filled with clay mineral aggregates and gypsum crystals. Insufficient passability of macropores in the armoured layer for pore waters shifts the evaporation front deeper into the rock. This results in contour scaling as the main process of rock-surface degradation, as opposed to granular disintegration on patterned rock crusts. Pracoviště Geologický ústav Kontakt Jana Popelková, popelkova@gli.cas.cz, Sabina Janíčková, Tel.: 233 087 272 Rok sběru 2012 Elektronická adresa https://www.irsm.cas.cz/materialy/acta_content/2011_01/3_Adamovic.pdf
Počet záznamů: 1