Epithermal gold mineralization in Costa Rica, Cordillera de Tilarán ? exploration geochemistry and genesis of gold deposits

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00025798%3A_____%2F11%3A00000204" target="_blank" >RIV/00025798:_____/11:00000204 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.3190/jgeosci.090" target="_blank" >http://dx.doi.org/10.3190/jgeosci.090</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3190/jgeosci.090" target="_blank" >10.3190/jgeosci.090</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Epithermal gold mineralization in Costa Rica, Cordillera de Tilarán ? exploration geochemistry and genesis of gold deposits

Popis výsledku v původním jazyce

Epithermal gold mineralization in the NW of Costa Rica is confined to Miocene?Pliocene volcanic arc. Gold-bearing quartz veins are related to steep fracture zones affected by mylonitization and pronounced alteration. Native gold (electrum 30?42 wt. % Ag)occurs as inclusions mostly up to 25 ?m grown in quartz and pyrite. The mineral assemblage includes pyrite, sphalerite, chalcopyrite, arsenopyrite and marcasite. Acanthite, pyrargyrite, greenockite, covellite, bornite and cassiterite are scarce. Sb, As,Pb and Hg exhibit significant positive correlations with Au. Fluid inclusions of the H2O type were found in quartz and sphalerite. The older coarse-grained quartz contains primary H2O inclusions with homogenization temperatures between 182 and 276 °C and very low salinity. Primary H2O inclusions in fine-grained younger quartz exhibit homogenization temperatures from 154 to 220 °C and very low salinity up to 3 wt. % NaCl eq. The age of ore pulses is estimated in the period between c. 6.0

Název v anglickém jazyce

Epithermal gold mineralization in Costa Rica, Cordillera de Tilarán ? exploration geochemistry and genesis of gold deposits

Popis výsledku anglicky

Epithermal gold mineralization in the NW of Costa Rica is confined to Miocene?Pliocene volcanic arc. Gold-bearing quartz veins are related to steep fracture zones affected by mylonitization and pronounced alteration. Native gold (electrum 30?42 wt. % Ag)occurs as inclusions mostly up to 25 ?m grown in quartz and pyrite. The mineral assemblage includes pyrite, sphalerite, chalcopyrite, arsenopyrite and marcasite. Acanthite, pyrargyrite, greenockite, covellite, bornite and cassiterite are scarce. Sb, As,Pb and Hg exhibit significant positive correlations with Au. Fluid inclusions of the H2O type were found in quartz and sphalerite. The older coarse-grained quartz contains primary H2O inclusions with homogenization temperatures between 182 and 276 °C and very low salinity. Primary H2O inclusions in fine-grained younger quartz exhibit homogenization temperatures from 154 to 220 °C and very low salinity up to 3 wt. % NaCl eq. The age of ore pulses is estimated in the period between c. 6.0

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

—

Návaznosti

V - Vyzkumna aktivita podporovana z jinych verejnych zdroju

Rok uplatnění

2011

Kód důvěrnosti údajů

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

Název periodika

Journal of Geosciences

ISSN

1802-6222

e-ISSN

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Svazek periodika

56

Číslo periodika v rámci svazku

—

Stát vydavatele periodika

CZ - Česká republika

Počet stran výsledku

24

Strana od-do

81-104

Kód UT WoS článku

000290046200006

EID výsledku v databázi Scopus

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