Solubility of molybdenite in hydrous granitic melts at 800 degrees C, 100-200 MPa

Kód výsledku v IS VaVaI

RIV/00216208:11310/14:10289906 - isvavai.cz

Výsledek na webu

http://dx.doi.org/10.1016/j.gca.2013.12.028

DOI - Digital Object Identifier

10.1016/j.gca.2013.12.028

Jazyk výsledku

angličtina

Název v původním jazyce

Solubility of molybdenite in hydrous granitic melts at 800 degrees C, 100-200 MPa

Popis výsledku v původním jazyce

The solubility of molybdenite, MoS2, in fluid-saturated, subaluminous to peraluminous granitic melts was determined experimentally using rapid-quench cold-seal pressure vessels at 800 degrees C and 100-200 MPa, and analysis by laser-ablation ICP-MS. Molybdenite solubility seems to be independent of pressure, but it shows strong variations with oxygen and sulfur fugacity. At constant log fS(2) = -1.3 it increases from 0.1-0.7 ppm by weight Mo at the Co-CoO buffer to 29-38 ppm by weight Mo near the MnO-Mn3O4 buffer. The solubility isopleths are nearly parallel to the pyrrhotite-magnetite equilibrium, along which the solubility varies only slightly, from 10 ppmw Mo at the quartz-fayalite-magnetite buffer to 29-38 ppmw Mo at the MnO-Mn3O4 buffer. The observed solubility variations are consistent with the equilibrium MoS2(s) + 3/2O(2) = MoO3 (l) + S-2 and thus confirm that molybdenum(VI) oxide is the predominant species in subaluminous silicate melts at log fO(2) = -16 to -11. In addition,

Název v anglickém jazyce

Solubility of molybdenite in hydrous granitic melts at 800 degrees C, 100-200 MPa

Popis výsledku anglicky

The solubility of molybdenite, MoS2, in fluid-saturated, subaluminous to peraluminous granitic melts was determined experimentally using rapid-quench cold-seal pressure vessels at 800 degrees C and 100-200 MPa, and analysis by laser-ablation ICP-MS. Molybdenite solubility seems to be independent of pressure, but it shows strong variations with oxygen and sulfur fugacity. At constant log fS(2) = -1.3 it increases from 0.1-0.7 ppm by weight Mo at the Co-CoO buffer to 29-38 ppm by weight Mo near the MnO-Mn3O4 buffer. The solubility isopleths are nearly parallel to the pyrrhotite-magnetite equilibrium, along which the solubility varies only slightly, from 10 ppmw Mo at the quartz-fayalite-magnetite buffer to 29-38 ppmw Mo at the MnO-Mn3O4 buffer. The observed solubility variations are consistent with the equilibrium MoS2(s) + 3/2O(2) = MoO3 (l) + S-2 and thus confirm that molybdenum(VI) oxide is the predominant species in subaluminous silicate melts at log fO(2) = -16 to -11. In addition,

Druh

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

CEP obor

DD - Geochemie

OECD FORD obor

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Projekt

GAP210/12/0986: Termodynamika a kinetika látkového přenosu, krystalizace a vývoje textur v magmatických a hydrotermálních systémech

Návaznosti

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

Rok uplatnění

2014

Kód důvěrnosti údajů

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

Název periodika

Geochimica et Cosmochimica Acta

ISSN

0016-7037

e-ISSN

—

Svazek periodika

131

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

9

Strana od-do

393-401

Kód UT WoS článku

000333330100024

EID výsledku v databázi Scopus

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