Aquamarine from Massangana batholith, Rondônia State: mineral chemistry and fluid inclusion data
Autor(a) principal: | |
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Data de Publicação: | 2020 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | REM - International Engineering Journal |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S2448-167X2020000300319 |
Resumo: | Abstract Beryl is usually found in granite-pegmatite systems. The addition of chromophore elements (V, Cr, Mn, Fe) into the crystalline structure favors color changes in beryl and thus generates some of the world’s expensive gems such as emerald, morganite, heliodor and aquamarine. The Massangana polyphasic batholith is a well-known cassiterite, wolframite and gems deposit in the Rondônia state. These metals and blue-gems (topaz and aquamarine) are located in feldspar-rich pegmatite granite bodies. The aquamarine crystals show color ranging from light- to medium-blue and display concentric growth zones. Electron-probe microanalyses revealed that the Fe is the main chromophore element, occupying the octahedral Al-site, while Na had an important role in the charge balance, inserted in the channel sites together with H2O. The irregular supply of Fe and Na during the nucleation and growth of aquamarine was the main cause for the color change. A fluid inclusion study indicated that the aquamarine growth under an aqueous fluid system (H2O-NaCl), with low salinity, low density and total homogenization temperature between 243º-315º C, is compatible with final temperatures in the pegmatite pocket zone. |
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Aquamarine from Massangana batholith, Rondônia State: mineral chemistry and fluid inclusion dataaquamarineMassangana batholithRondôniaelectron probe microanalysis (EPMA)mineral chemistrymicrothermometryfluid inclusionAbstract Beryl is usually found in granite-pegmatite systems. The addition of chromophore elements (V, Cr, Mn, Fe) into the crystalline structure favors color changes in beryl and thus generates some of the world’s expensive gems such as emerald, morganite, heliodor and aquamarine. The Massangana polyphasic batholith is a well-known cassiterite, wolframite and gems deposit in the Rondônia state. These metals and blue-gems (topaz and aquamarine) are located in feldspar-rich pegmatite granite bodies. The aquamarine crystals show color ranging from light- to medium-blue and display concentric growth zones. Electron-probe microanalyses revealed that the Fe is the main chromophore element, occupying the octahedral Al-site, while Na had an important role in the charge balance, inserted in the channel sites together with H2O. The irregular supply of Fe and Na during the nucleation and growth of aquamarine was the main cause for the color change. A fluid inclusion study indicated that the aquamarine growth under an aqueous fluid system (H2O-NaCl), with low salinity, low density and total homogenization temperature between 243º-315º C, is compatible with final temperatures in the pegmatite pocket zone.Fundação Gorceix2020-09-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S2448-167X2020000300319REM - International Engineering Journal v.73 n.3 2020reponame:REM - International Engineering Journalinstname:Fundação Gorceix (FG)instacron:FG10.1590/0370-44672019730053info:eu-repo/semantics/openAccessHoyer,Ingrid de SouzaSouza,Valmir da SilvaDebowski,Beatriz Pereiraeng2020-06-17T00:00:00Zoai:scielo:S2448-167X2020000300319Revistahttps://www.rem.com.br/?lang=pt-brPRIhttps://old.scielo.br/oai/scielo-oai.php||editor@rem.com.br2448-167X2448-167Xopendoar:2020-06-17T00:00REM - International Engineering Journal - Fundação Gorceix (FG)false |
dc.title.none.fl_str_mv |
Aquamarine from Massangana batholith, Rondônia State: mineral chemistry and fluid inclusion data |
title |
Aquamarine from Massangana batholith, Rondônia State: mineral chemistry and fluid inclusion data |
spellingShingle |
Aquamarine from Massangana batholith, Rondônia State: mineral chemistry and fluid inclusion data Hoyer,Ingrid de Souza aquamarine Massangana batholith Rondônia electron probe microanalysis (EPMA) mineral chemistry microthermometry fluid inclusion |
title_short |
Aquamarine from Massangana batholith, Rondônia State: mineral chemistry and fluid inclusion data |
title_full |
Aquamarine from Massangana batholith, Rondônia State: mineral chemistry and fluid inclusion data |
title_fullStr |
Aquamarine from Massangana batholith, Rondônia State: mineral chemistry and fluid inclusion data |
title_full_unstemmed |
Aquamarine from Massangana batholith, Rondônia State: mineral chemistry and fluid inclusion data |
title_sort |
Aquamarine from Massangana batholith, Rondônia State: mineral chemistry and fluid inclusion data |
author |
Hoyer,Ingrid de Souza |
author_facet |
Hoyer,Ingrid de Souza Souza,Valmir da Silva Debowski,Beatriz Pereira |
author_role |
author |
author2 |
Souza,Valmir da Silva Debowski,Beatriz Pereira |
author2_role |
author author |
dc.contributor.author.fl_str_mv |
Hoyer,Ingrid de Souza Souza,Valmir da Silva Debowski,Beatriz Pereira |
dc.subject.por.fl_str_mv |
aquamarine Massangana batholith Rondônia electron probe microanalysis (EPMA) mineral chemistry microthermometry fluid inclusion |
topic |
aquamarine Massangana batholith Rondônia electron probe microanalysis (EPMA) mineral chemistry microthermometry fluid inclusion |
description |
Abstract Beryl is usually found in granite-pegmatite systems. The addition of chromophore elements (V, Cr, Mn, Fe) into the crystalline structure favors color changes in beryl and thus generates some of the world’s expensive gems such as emerald, morganite, heliodor and aquamarine. The Massangana polyphasic batholith is a well-known cassiterite, wolframite and gems deposit in the Rondônia state. These metals and blue-gems (topaz and aquamarine) are located in feldspar-rich pegmatite granite bodies. The aquamarine crystals show color ranging from light- to medium-blue and display concentric growth zones. Electron-probe microanalyses revealed that the Fe is the main chromophore element, occupying the octahedral Al-site, while Na had an important role in the charge balance, inserted in the channel sites together with H2O. The irregular supply of Fe and Na during the nucleation and growth of aquamarine was the main cause for the color change. A fluid inclusion study indicated that the aquamarine growth under an aqueous fluid system (H2O-NaCl), with low salinity, low density and total homogenization temperature between 243º-315º C, is compatible with final temperatures in the pegmatite pocket zone. |
publishDate |
2020 |
dc.date.none.fl_str_mv |
2020-09-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S2448-167X2020000300319 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S2448-167X2020000300319 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/0370-44672019730053 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
text/html |
dc.publisher.none.fl_str_mv |
Fundação Gorceix |
publisher.none.fl_str_mv |
Fundação Gorceix |
dc.source.none.fl_str_mv |
REM - International Engineering Journal v.73 n.3 2020 reponame:REM - International Engineering Journal instname:Fundação Gorceix (FG) instacron:FG |
instname_str |
Fundação Gorceix (FG) |
instacron_str |
FG |
institution |
FG |
reponame_str |
REM - International Engineering Journal |
collection |
REM - International Engineering Journal |
repository.name.fl_str_mv |
REM - International Engineering Journal - Fundação Gorceix (FG) |
repository.mail.fl_str_mv |
||editor@rem.com.br |
_version_ |
1754734691493085184 |