Quantifying Non-Thermal Silicate Weathering Using Ge/Si and Si Isotopes in Rivers Draining the Yellowstone Plateau Volcanic Field, USA

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F21%3A10439006" target="_blank" >RIV/00216208:11310/21:10439006 - isvavai.cz</a>

Výsledek na webu

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=WCN3Dabq3M" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=WCN3Dabq3M</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1029/2021GC009904" target="_blank" >10.1029/2021GC009904</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Quantifying Non-Thermal Silicate Weathering Using Ge/Si and Si Isotopes in Rivers Draining the Yellowstone Plateau Volcanic Field, USA

Popis výsledku v původním jazyce

In active volcanic regions, high-temperature chemical reactions in the hydrothermal system consume CO2 sourced from magma or from the deep crust, whereas reactions with silicates at shallow depths mainly consume atmospheric CO2. Numerous studies have quantified the load of dissolved solids in rivers that drain volcanic regions to determine chemical weathering rates and atmospheric CO2 consumption rates. However, the balance between thermal and non-thermal components to riverine fluxes in these areas remains poorly constrained, hindering accurate estimates of atmospheric CO2 consumption rates. Here we use the Ge/Si ratio and the stable silicon isotopes {δ(30)Si} as tracers for quantifying non-thermal silicon contributions in rivers draining the Yellowstone Plateau Volcanic Field, USA. The Ge/Si ratio (µmol.mol(-1)) was determined for seven thermal water samples (183 +/- 22), eight rivers (35 +/- 23) and six creeks flowing into Yellowstone Lake (5 +/- 3) during base flow and during peak water discharge following snowmelt. The δ(30)Si value (parts per thousand) was determined for thermal waters (-0.09 +/- 0.04), Yellowstone River at Yellowstone Lake outlet (1.91 +/- 0.23) and creek samples (0.82 +/- 0.29). The calculated atmospheric CO2 consumption associated with non-thermal waters flowing through Yellowstone&apos;s rivers during peak discharge is similar to 3.03 ton.km(-2).yr(-1), which is similar to 2% of the annual mean atmospheric CO2 consumption in other volcanic regions. This study highlights the significance of quantifying seasonal variations in chemical weathering rates for improving estimates of atmospheric CO2 consumption rates in active volcanic regions.

Název v anglickém jazyce

Quantifying Non-Thermal Silicate Weathering Using Ge/Si and Si Isotopes in Rivers Draining the Yellowstone Plateau Volcanic Field, USA

Popis výsledku anglicky

In active volcanic regions, high-temperature chemical reactions in the hydrothermal system consume CO2 sourced from magma or from the deep crust, whereas reactions with silicates at shallow depths mainly consume atmospheric CO2. Numerous studies have quantified the load of dissolved solids in rivers that drain volcanic regions to determine chemical weathering rates and atmospheric CO2 consumption rates. However, the balance between thermal and non-thermal components to riverine fluxes in these areas remains poorly constrained, hindering accurate estimates of atmospheric CO2 consumption rates. Here we use the Ge/Si ratio and the stable silicon isotopes {δ(30)Si} as tracers for quantifying non-thermal silicon contributions in rivers draining the Yellowstone Plateau Volcanic Field, USA. The Ge/Si ratio (µmol.mol(-1)) was determined for seven thermal water samples (183 +/- 22), eight rivers (35 +/- 23) and six creeks flowing into Yellowstone Lake (5 +/- 3) during base flow and during peak water discharge following snowmelt. The δ(30)Si value (parts per thousand) was determined for thermal waters (-0.09 +/- 0.04), Yellowstone River at Yellowstone Lake outlet (1.91 +/- 0.23) and creek samples (0.82 +/- 0.29). The calculated atmospheric CO2 consumption associated with non-thermal waters flowing through Yellowstone&apos;s rivers during peak discharge is similar to 3.03 ton.km(-2).yr(-1), which is similar to 2% of the annual mean atmospheric CO2 consumption in other volcanic regions. This study highlights the significance of quantifying seasonal variations in chemical weathering rates for improving estimates of atmospheric CO2 consumption rates in active volcanic regions.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10505 - Geology

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2021

Kód důvěrnosti údajů

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

Název periodika

Geochemistry, Geophysics, Geosystems

ISSN

1525-2027

e-ISSN

—

Svazek periodika

22

Číslo periodika v rámci svazku

11

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

20

Strana od-do

e2021GC009904

Kód UT WoS článku

000723103400022

EID výsledku v databázi Scopus

2-s2.0-85119833491