| dc.contributor.author |
Mohapatrai, B.K. |
|
| dc.contributor.author |
Nayak, Bibhuranjan |
|
| dc.date.accessioned |
2018-10-01T12:22:04Z |
|
| dc.date.available |
2018-10-01T12:22:04Z |
|
| dc.date.issued |
2003 |
|
| dc.identifier.citation |
Journal Of The Geological Society Of India, 61(5), 2003: 581-587 |
|
| dc.identifier.issn |
0016-7622 |
|
| dc.identifier.uri |
http://ore.immt.res.in/handle/2018/1060 |
|
| dc.description.abstract |
Mn-olivine (tephroite) bearing assemblage is often recorded in manganese silicate-carbonate-oxide rocks metamorphosed to green schist facies condition in Precambrian Gangpur Group, Orissa. Divalent Mn and Fe dominate this assemblage with most phases having high Mn/Fe ratios. Minerals in the assemblage include near end - member tephroite (Tp(90.33-90.95)Fa(4.76-8.40)Fo(0.55-4.71)), rhodochrosite, pyroxmangite, jacobsite, spessartine dominated garnet with minor quartz, apatite and barite. Tephroite is sometimes altered to either Mn-rich minnesotaite or to a sepiolite related mineral that resembles serpentine in Mg-olivine rocks. This assemblage is very likely evolved through decarbonation-oxidation processes of a carbonatic precursor under a relatively low oxygen fugacity condition. |
|
| dc.language |
en |
|
| dc.publisher |
Geological Society Of India |
|
| dc.relation.isreferencedby |
SCI |
|
| dc.rights |
Copyright [2003]. All efforts have been made to respect the copyright to the best of our knowledge. Inadvertent omissions, if brought to our notice, stand for correction and withdrawal of document from this repository. |
|
| dc.subject |
Geosciences |
|
| dc.title |
Mn-olivine from Gangpur Group of rocks, Orissa |
|
| dc.type |
Journal Article |
|
| dc.affiliation.author |
CSIR-IMMT, Bhubaneswar 751013, Odisha, India |
|