Sökning: L773:1467 4866 > Chromite oxidation ...
Fältnamn | Indikatorer | Metadata |
---|---|---|
000 | 02834naa a2200373 4500 | |
001 | oai:DiVA.org:su-61760 | |
003 | SwePub | |
008 | 110829s2011 | |||||||||||000 ||eng| | |
024 | 7 | a https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-617602 URI |
024 | 7 | a https://doi.org/10.1186/1467-4866-12-52 DOI |
040 | a (SwePub)su | |
041 | a engb eng | |
042 | 9 SwePub | |
072 | 7 | a ref2 swepub-contenttype |
072 | 7 | a art2 swepub-publicationtype |
100 | 1 | a Ivarsson, Magnus4 aut |
245 | 1 0 | a Chromite oxidation by manganee oxides in subseafloor basalts and the presence of putative fossilized microorganisms |
264 | c 2011-06-03 | |
264 | 1 | b Springer Science and Business Media LLC,c 2011 |
338 | a print2 rdacarrier | |
520 | a Chromite is a mineral with low solubility and is thus resistant to dissolution. The exception is when manganese oxides are available, since they are the only known naturally occurring oxidants for chromite. In the presence of Mn(IV) oxides, Cr(III) will oxidise to Cr(VI), which is more soluble than Cr(III), and thus easier to be removed. Here we report of chromite phenocrysts that are replaced by rhodochrosite (Mn(II) carbonate) in subseafloor basalts from the Koko Seamount, Pacific Ocean, that were drilled and collected during the Ocean Drilling Program (ODP) Leg 197. The mineral succession chromite-rhodochrosite-saponite in the phenocrysts is interpreted as the result of chromite oxidation by manganese oxides. Putative fossilized microorganisms are abundant in the rhodochrosite and we suggest that the oxidation of chromite has been mediated by microbial activity. It has previously been shown in soils and in laboratory experiments that chromium oxidation is indirectly mediated by microbial formation of manganese oxides. Here we suggest a similar process in subseafloor basalts. | |
650 | 7 | a NATURVETENSKAPx Geovetenskap och miljövetenskapx Annan geovetenskap och miljövetenskap0 (SwePub)105992 hsv//swe |
650 | 7 | a NATURAL SCIENCESx Earth and Related Environmental Sciencesx Other Earth and Related Environmental Sciences0 (SwePub)105992 hsv//eng |
653 | a Other earth sciences | |
653 | a Övrig geovetenskap | |
653 | a geokemi | |
653 | a Geochemistry | |
700 | 1 | a Broman, Curtu Stockholms universitet,Institutionen för geologiska vetenskaper4 aut |
700 | 1 | a Holm, Nilsu Stockholms universitet,Institutionen för geologiska vetenskaper4 aut0 (Swepub:su)nholm |
710 | 2 | a Stockholms universitetb Institutionen för geologiska vetenskaper4 org |
773 | 0 | t Geochemical Transactionsd : Springer Science and Business Media LLCg 12, s. 5-q 12<5-x 1467-4866 |
856 | 4 | u https://doi.org/10.1186/1467-4866-12-5 |
856 | 4 8 | u https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-61760 |
856 | 4 8 | u https://doi.org/10.1186/1467-4866-12-5 |
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