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

Result code in 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>

Result on the web

<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>

Result language

angličtina

Original language name

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

Original language description

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

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

DB - Geology and mineralogy

OECD FORD branch

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Project

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Continuities

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

Publication year

2011

Confidentiality

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

Name of the periodical

South African Journal of Geology

ISSN

1012-0750

e-ISSN

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Volume of the periodical

114

Issue of the periodical within the volume

1

Country of publishing house

ZA - SOUTH AFRICA

Number of pages

20

Pages from-to

57-76

UT code for WoS article

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EID of the result in the Scopus database

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