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

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985831%3A_____%2F11%3A00359012" target="_blank" >RIV/67985831:_____/11:00359012 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/67985891:_____/11:00359012

Výsledek na webu

<a href="http://www.irsm.cas.cz/abstracts/AGG/01_11/3_Adamovic.pdf" target="_blank" >http://www.irsm.cas.cz/abstracts/AGG/01_11/3_Adamovic.pdf</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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 explainedby 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 thearmoured 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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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 explainedby 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 thearmoured 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.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

DB - Geologie a mineralogie

OECD FORD obor

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Projekt

<a href="/cs/project/IAA300130806" target="_blank" >IAA300130806: Koncept morfofacie mikroreliéfu a mezoreliéfu pískovců temperátní zóny</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2011

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Acta geodynamica et geomaterialia

ISSN

1214-9705

e-ISSN

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Svazek periodika

8

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

CZ - Česká republika

Počet stran výsledku

17

Strana od-do

29-45

Kód UT WoS článku

000290696600003

EID výsledku v databázi Scopus

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