Počet záznamů: 1

Porosity changes induced by salt weathering of sandstones, Bohemian Cretaceous Basin, Czech Republic

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, SAI}
Zdroj.dok.	Acta geodynamica et geomaterialia. - : Ústav struktury a mechaniky hornin AV ČR, v. v. i. - ISSN 1214-9705 Roč. 8, č. 1 (2011), s. 29-45
Poč.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