Chemical weathering in Antarctica: an example of igneous rock particles in Big Lachman Lake sediments, James Ross Island

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F26296080%3A_____%2F20%3AN0000124" target="_blank" >RIV/26296080:_____/20:N0000124 - isvavai.cz</a>

Výsledek na webu

<a href="http://www.muni.cz" target="_blank" >http://www.muni.cz</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s12665-020-08926-3" target="_blank" >10.1007/s12665-020-08926-3</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Chemical weathering in Antarctica: an example of igneous rock particles in Big Lachman Lake sediments, James Ross Island

Popis výsledku v původním jazyce

The intensity of chemical weathering of volcanic rock particles in the sediments was expressed by the Chemical Index of Alteration (CIA), which reflects alteration of feldspars and formation of clay minerals. The observed mineral assemblage of montmorillonite, illite, and kaolinite probably originated from alteration of volcanic glass and from alteration of feldspars to clay minerals. CIA weathering rates from the lacustrine sediments are similar to those of Early Jurrasic high-Ti volcanic rocks of the Mount Poster Formation and Middle Jurrasic high-Ti volcanic rocks of the Mapple Formation from the Antarctic Peninsula. However, the sediments show a good fit in OIB-normalized incompatible trace-element patterns only with the high-Ti volcanic rocks from the Middle Jurassic rhyolites of the Mapple Formation, while the fit with Cenozoic basalts of the James Ross Island Volcanic Group is poorer. Rocks from the Antarctic Peninsula were probably transported through the Prince Gustav channel by small glaciers during the Neogene and Quaternary.

Název v anglickém jazyce

Chemical weathering in Antarctica: an example of igneous rock particles in Big Lachman Lake sediments, James Ross Island

Popis výsledku anglicky

The intensity of chemical weathering of volcanic rock particles in the sediments was expressed by the Chemical Index of Alteration (CIA), which reflects alteration of feldspars and formation of clay minerals. The observed mineral assemblage of montmorillonite, illite, and kaolinite probably originated from alteration of volcanic glass and from alteration of feldspars to clay minerals. CIA weathering rates from the lacustrine sediments are similar to those of Early Jurrasic high-Ti volcanic rocks of the Mount Poster Formation and Middle Jurrasic high-Ti volcanic rocks of the Mapple Formation from the Antarctic Peninsula. However, the sediments show a good fit in OIB-normalized incompatible trace-element patterns only with the high-Ti volcanic rocks from the Middle Jurassic rhyolites of the Mapple Formation, while the fit with Cenozoic basalts of the James Ross Island Volcanic Group is poorer. Rocks from the Antarctic Peninsula were probably transported through the Prince Gustav channel by small glaciers during the Neogene and Quaternary.

Druh

J_SC - Článek v periodiku v databázi SCOPUS

CEP obor

—

OECD FORD obor

40500 - Other agricultural sciences

Projekt

<a href="/cs/project/QK1810233" target="_blank" >QK1810233: Kvantifikace dopadu hospodaření na erozi, kvalitu půd a výnosy pěstovaných plodin s návrhem pěstebních technologií šetrných k životnímu prostředí</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2020

Kód důvěrnosti údajů

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

Název periodika

Environmental Earth Sciences

ISSN

18666299

e-ISSN

—

Svazek periodika

79

Číslo periodika v rámci svazku

186

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

18

Strana od-do

1-18

Kód UT WoS článku

—

EID výsledku v databázi Scopus

2-s2.0-85083288064