GEOCHEMICAL AND MINERALOGICAL CONSTRAINTS ON THE GENESIS OF THE OTJOSONDU FERROMANGANESE DEPOSIT, NAMIBIA: HYDROTHERMAL EXHALATIVE VERSUS HYDROGENETIC (INCLUDING SNOWBALL-EARTH) ORIGINS

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00025798%3A_____%2F11%3A00000540" target="_blank" >RIV/00025798:_____/11:00000540 - isvavai.cz</a>

Výsledek na webu

<a href="http://sajg.geoscienceworld.org/content/114/1/57.full" target="_blank" >http://sajg.geoscienceworld.org/content/114/1/57.full</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.2113/gssajg.114.1.57" target="_blank" >10.2113/gssajg.114.1.57</a>

Jazyk výsledku

angličtina

Název v původním jazyce

GEOCHEMICAL AND MINERALOGICAL CONSTRAINTS ON THE GENESIS OF THE OTJOSONDU FERROMANGANESE DEPOSIT, NAMIBIA: HYDROTHERMAL EXHALATIVE VERSUS HYDROGENETIC (INCLUDING SNOWBALL-EARTH) ORIGINS

Popis výsledku v původním jazyce

The Otjosondu ferromanganese deposit is located in a condensed stratigraphic sequence that indicates a basin-margin setting on the northern flank of the Khomas Trough. Association with the Chuos Formation of the Damara Sequence is equivocal as only sediments atypical of this formation are present. Three rock types, hematitic itabirite, braunite-rich gondite and coticule (spessartine?quartz rock), dominate the succession. Barite is a major component of some gonditic ores, whereas barite and hyalophane form important minor constituents of all rock types. Two broad metal associations are present in the ferromanganese rocks (gondite and coticule): Mn?Fe?Ag?As?P?Cu?Co?Bi?B and Ba?Sr?Mo?W?Ni. The three rock types, gondite, coticule and itabirite, represent variable mixtures of hydrothermal and detrital components. Values of barite ?34S are inversely correlated with whole-rock Fe contents and indicate mixing of hydrothermal and sea-water S sources. Cerium anomalies implicate oxic oceanic cond

Název v anglickém jazyce

GEOCHEMICAL AND MINERALOGICAL CONSTRAINTS ON THE GENESIS OF THE OTJOSONDU FERROMANGANESE DEPOSIT, NAMIBIA: HYDROTHERMAL EXHALATIVE VERSUS HYDROGENETIC (INCLUDING SNOWBALL-EARTH) ORIGINS

Popis výsledku anglicky

The Otjosondu ferromanganese deposit is located in a condensed stratigraphic sequence that indicates a basin-margin setting on the northern flank of the Khomas Trough. Association with the Chuos Formation of the Damara Sequence is equivocal as only sediments atypical of this formation are present. Three rock types, hematitic itabirite, braunite-rich gondite and coticule (spessartine?quartz rock), dominate the succession. Barite is a major component of some gonditic ores, whereas barite and hyalophane form important minor constituents of all rock types. Two broad metal associations are present in the ferromanganese rocks (gondite and coticule): Mn?Fe?Ag?As?P?Cu?Co?Bi?B and Ba?Sr?Mo?W?Ni. The three rock types, gondite, coticule and itabirite, represent variable mixtures of hydrothermal and detrital components. Values of barite ?34S are inversely correlated with whole-rock Fe contents and indicate mixing of hydrothermal and sea-water S sources. Cerium anomalies implicate oxic oceanic cond

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

Z - Vyzkumny zamer (s odkazem do CEZ)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2011

Kód důvěrnosti údajů

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

Název periodika

South African Journal of Geology

ISSN

1012-0750

e-ISSN

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Svazek periodika

114

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

ZA - Jihoafrická republika

Počet stran výsledku

20

Strana od-do

57-76

Kód UT WoS článku

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EID výsledku v databázi Scopus

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