High pressure experimental investigation of clinopyroxene dissolution in a K-basaltic melt

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F21%3A10441958" target="_blank" >RIV/00216208:11310/21:10441958 - isvavai.cz</a>

Výsledek na webu

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=n9x3h60jMd" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=n9x3h60jMd</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.chemgeo.2021.120533" target="_blank" >10.1016/j.chemgeo.2021.120533</a>

Jazyk výsledku

angličtina

Název v původním jazyce

High pressure experimental investigation of clinopyroxene dissolution in a K-basaltic melt

Popis výsledku v původním jazyce

Dissolution of clinopymxene (cpx) in a K-basaltic melt from the Campi Flegrei Volcanic District (Italy) has been investigated through dissolution and dissolution-crystallization experiments at pressure of 0.8 GPa, superliquidus temperature of 1350 degrees C, and dwell times between 0.5 and 1 h. The obtained dissolution rates range from 7.9.10(-6) cm s(-1) to 6.1.10(-6) cm s(-1) as a function of dwell time. In the dissolution-crystallization experiment (1300 degrees C; 0.8 GPa; 2 h), the formation of overgrowth rims accompanied by new cpx crystals suggests that the injection of recharge magmas in basaltic reservoir may lead to inverse or oscillatory zonation. The interaction between cpx and K-basaltic melt at approx. 1570 degrees C was studied by in situ radiography using synchrotron radiation combined with the Paris-Edinburgh press. This resulted in cpx resorption to occur depending on the temperature conditions with respect to the liquidus temperature of the cpx {T(cpxL)}. The calculated cpx dissolution rates are approx. 5.10(-3) cm s(-1) at T &lt;= T(cpxL), and approx. 3.10(-2) cm s(-1) at T &gt;= T(cpxL). The role of crystal dissolution in the estimation of magma residence times has been also tested for a natural magmatic system by interpolating the dissolution rates {approx. 10(-5)-10(-6) cm s(-1)} with the textural data of cpx phenocrysts from the Agnano-Monte Spina pyroclastic deposit at Campi Flegrei caldera (Campanian region, Italy). Results from calculations indicate that the time required for partial or complete resorption of phenocrysts varies from approx. 0.5 to approx. 40 h, and that the effect of crystal dissolution may be relevant to estimate magma residence times whether significant dissolution occurs during magma mixing processes.

Název v anglickém jazyce

High pressure experimental investigation of clinopyroxene dissolution in a K-basaltic melt

Popis výsledku anglicky

Dissolution of clinopymxene (cpx) in a K-basaltic melt from the Campi Flegrei Volcanic District (Italy) has been investigated through dissolution and dissolution-crystallization experiments at pressure of 0.8 GPa, superliquidus temperature of 1350 degrees C, and dwell times between 0.5 and 1 h. The obtained dissolution rates range from 7.9.10(-6) cm s(-1) to 6.1.10(-6) cm s(-1) as a function of dwell time. In the dissolution-crystallization experiment (1300 degrees C; 0.8 GPa; 2 h), the formation of overgrowth rims accompanied by new cpx crystals suggests that the injection of recharge magmas in basaltic reservoir may lead to inverse or oscillatory zonation. The interaction between cpx and K-basaltic melt at approx. 1570 degrees C was studied by in situ radiography using synchrotron radiation combined with the Paris-Edinburgh press. This resulted in cpx resorption to occur depending on the temperature conditions with respect to the liquidus temperature of the cpx {T(cpxL)}. The calculated cpx dissolution rates are approx. 5.10(-3) cm s(-1) at T &lt;= T(cpxL), and approx. 3.10(-2) cm s(-1) at T &gt;= T(cpxL). The role of crystal dissolution in the estimation of magma residence times has been also tested for a natural magmatic system by interpolating the dissolution rates {approx. 10(-5)-10(-6) cm s(-1)} with the textural data of cpx phenocrysts from the Agnano-Monte Spina pyroclastic deposit at Campi Flegrei caldera (Campanian region, Italy). Results from calculations indicate that the time required for partial or complete resorption of phenocrysts varies from approx. 0.5 to approx. 40 h, and that the effect of crystal dissolution may be relevant to estimate magma residence times whether significant dissolution occurs during magma mixing processes.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10505 - Geology

Projekt

<a href="/cs/project/GA18-01982S" target="_blank" >GA18-01982S: Experimentální určení vlivu fugacity kyslíku na distribuci vysoce siderofilních prvků mezi minerály a taveninu v plášťových podmínkách</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2021

Kód důvěrnosti údajů

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

Název periodika

Chemical Geology

ISSN

0009-2541

e-ISSN

—

Svazek periodika

584

Číslo periodika v rámci svazku

December

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

16

Strana od-do

120533

Kód UT WoS článku

000702310500033

EID výsledku v databázi Scopus

2-s2.0-85115390731