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Redistribution of incompatible elements during hydrothermal alteration of pegmatite from the Djurkovo Pb-Zn deposit, Central Rhodopes.

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Title: Redistribution of incompatible elements during hydrothermal alteration of pegmatite from the Djurkovo Pb-Zn deposit, Central Rhodopes.
Alternate Title: Преразпределение на несъвместими елементи при хидротермални изменения на пегматити от Pb-Zn находище Джурково, Централни Родопи.
Authors: Georgieva, Sylvina1 sylvina@geology.bas.bg, Vassileva, Rossitsa D.1 rosivas@geology.bas.bg, Grozdev, Valentin1 valgrozdev@gmail.com, Milenkov, Georgi1 georgimilenkov7@gmail.com, Cempírek, Jan2 jan.cempirek@gmail.com, Škoda, Radek2 rskoda@sci.muni.cz, Stefanova, Elitsa1 elitsa.s@gmail.com
Source: Review of the Bulgarian Geological Society. 2023, Vol. 84 Issue 3, p35-38. 4p.
Subjects: Hydrothermal alteration, Oxide minerals, Sphene, Garnet, Pegmatites, Minerals
Abstract: Mineralogical and geochemical study was done on weakly deformed, relatively thin pegmatites that intruded the marbles of the Rhodope metamorphic complex in the Djurkovo Pb-Zn deposit, Central Rhodopes. The pegmatites consist mainly of K-feldspar and quartz and contain minor garnet; the pegmatites lack clear zonation except for the preferable crystallization of the garnet in the central parts. The main accessory minerals are ishikawaite, zircon, monazite-(Ce), apatite, and titanite. The textural relationships indicate later hydrothermal alteration of pegmatites which led to the formation of albite, epidote, sericite, chlorite, carbonate, quartz and leucoxene. The (REE+Y, ACT, Nb, Ta, Ti)-bearing pegmatite minerals (oxides, silicates and phosphates) are partly leached and/or replaced by secondary ones. The newly-formed phases precipitated as anhedral grains along fractures and dissolved zones onto/ or close to the primary minerals due to the limited mobility of the incompatible elements in fluids conditioned by pH, ligand activity and temperature. [ABSTRACT FROM AUTHOR]
Copyright of Review of the Bulgarian Geological Society is the property of Bulgarian Geological Society and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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PubType: Academic Journal
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  Data: Redistribution of incompatible elements during hydrothermal alteration of pegmatite from the Djurkovo Pb-Zn deposit, Central Rhodopes.
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  Data: Преразпределение на несъвместими елементи при хидротермални изменения на пегматити от Pb-Zn находище Джурково, Централни Родопи.
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  Data: <searchLink fieldCode="AR" term="%22Georgieva%2C+Sylvina%22">Georgieva, Sylvina</searchLink><relatesTo>1</relatesTo><i> sylvina@geology.bas.bg</i><br /><searchLink fieldCode="AR" term="%22Vassileva%2C+Rossitsa+D%2E%22">Vassileva, Rossitsa D.</searchLink><relatesTo>1</relatesTo><i> rosivas@geology.bas.bg</i><br /><searchLink fieldCode="AR" term="%22Grozdev%2C+Valentin%22">Grozdev, Valentin</searchLink><relatesTo>1</relatesTo><i> valgrozdev@gmail.com</i><br /><searchLink fieldCode="AR" term="%22Milenkov%2C+Georgi%22">Milenkov, Georgi</searchLink><relatesTo>1</relatesTo><i> georgimilenkov7@gmail.com</i><br /><searchLink fieldCode="AR" term="%22Cempírek%2C+Jan%22">Cempírek, Jan</searchLink><relatesTo>2</relatesTo><i> jan.cempirek@gmail.com</i><br /><searchLink fieldCode="AR" term="%22Škoda%2C+Radek%22">Škoda, Radek</searchLink><relatesTo>2</relatesTo><i> rskoda@sci.muni.cz</i><br /><searchLink fieldCode="AR" term="%22Stefanova%2C+Elitsa%22">Stefanova, Elitsa</searchLink><relatesTo>1</relatesTo><i> elitsa.s@gmail.com</i>
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  Data: <searchLink fieldCode="JN" term="%22Review+of+the+Bulgarian+Geological+Society%22">Review of the Bulgarian Geological Society</searchLink>. 2023, Vol. 84 Issue 3, p35-38. 4p.
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  Data: <searchLink fieldCode="DE" term="%22Hydrothermal+alteration%22">Hydrothermal alteration</searchLink><br /><searchLink fieldCode="DE" term="%22Oxide+minerals%22">Oxide minerals</searchLink><br /><searchLink fieldCode="DE" term="%22Sphene%22">Sphene</searchLink><br /><searchLink fieldCode="DE" term="%22Garnet%22">Garnet</searchLink><br /><searchLink fieldCode="DE" term="%22Pegmatites%22">Pegmatites</searchLink><br /><searchLink fieldCode="DE" term="%22Minerals%22">Minerals</searchLink>
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  Label: Abstract
  Group: Ab
  Data: Mineralogical and geochemical study was done on weakly deformed, relatively thin pegmatites that intruded the marbles of the Rhodope metamorphic complex in the Djurkovo Pb-Zn deposit, Central Rhodopes. The pegmatites consist mainly of K-feldspar and quartz and contain minor garnet; the pegmatites lack clear zonation except for the preferable crystallization of the garnet in the central parts. The main accessory minerals are ishikawaite, zircon, monazite-(Ce), apatite, and titanite. The textural relationships indicate later hydrothermal alteration of pegmatites which led to the formation of albite, epidote, sericite, chlorite, carbonate, quartz and leucoxene. The (REE+Y, ACT, Nb, Ta, Ti)-bearing pegmatite minerals (oxides, silicates and phosphates) are partly leached and/or replaced by secondary ones. The newly-formed phases precipitated as anhedral grains along fractures and dissolved zones onto/ or close to the primary minerals due to the limited mobility of the incompatible elements in fluids conditioned by pH, ligand activity and temperature. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Review of the Bulgarian Geological Society is the property of Bulgarian Geological Society and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.52215/rev.bgs.2023.84.3.35
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      – Code: eng
        Text: English
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        PageCount: 4
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      – SubjectFull: Hydrothermal alteration
        Type: general
      – SubjectFull: Oxide minerals
        Type: general
      – SubjectFull: Sphene
        Type: general
      – SubjectFull: Garnet
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      – SubjectFull: Pegmatites
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      – TitleFull: Redistribution of incompatible elements during hydrothermal alteration of pegmatite from the Djurkovo Pb-Zn deposit, Central Rhodopes.
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              Text: 2023
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