Rare-earth element mineralization in altered pegmatites from the Djurkovo Pb-Zn deposit, Central Rhodopes

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F23%3A00142074" target="_blank" >RIV/00216224:14310/23:00142074 - isvavai.cz</a>

Result on the web

<a href="https://www.e-sga.org/fileadmin/PDF/Conference_proceedings/Zuerich/SGA_2023_Zurich_Volume_1.pdf" target="_blank" >https://www.e-sga.org/fileadmin/PDF/Conference_proceedings/Zuerich/SGA_2023_Zurich_Volume_1.pdf</a>

DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Rare-earth element mineralization in altered pegmatites from the Djurkovo Pb-Zn deposit, Central Rhodopes

Original language description

The Djurkovo polymetallic vein deposit is formed by veins filling open space in various gneisses that compose the high-grade metamorphic complex in the Central Rhodopes. Abundant deformed concordant or crosscutting pegmatites of varying thickness are common in the metamorphic sequence. The studied pegmatite dykes consist mainly of plagioclase, K-feldspar, quartz, and minor micas. The main accessory minerals are allanite- (Ce), titanite, apatite and zircon. Late hydrothermal overprint and alteration of pegmatites led to formation of epidote-group minerals, adularia, albite, sericite, chlorite, carbonate, quartz and leucoxene. The secondary minerals also include rare earth element (REE+Y) and Th, U fluorcarbonate - phosphate - oxide assemblages. This mineral association typically occurs as very fine-grained (. 20 mu m) anhedral disseminations, observed along fractures and dissolved zones in allanite and titanite that evidently are the main source for the REEs. This indicates remobilization of REEs followed by formation of new phases during the late-stage hydrothermal activity. Limited mobility of REEs is illustrated by precipitation of the newly-formed minerals within the grains of the altered accessory minerals. The studied pegmatites retain a significant amount of accessory minerals rich in incompatible elements and despite being hydrothermally altered they could be considered as their potential source.

Czech name

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Czech description

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Type

D - Article in proceedings

CEP classification

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OECD FORD branch

10505 - Geology

Project

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Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2023

Confidentiality

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

Article name in the collection

17th Biennial SGA Meeting - Proceedings Volume 1

ISBN

9782839940443

ISSN

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e-ISSN

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Number of pages

4

Pages from-to

238-241

Publisher name

Society for Geology Applied to Mineral Deposits

Place of publication

Geneva

Event location

Zurich, Switzerland

Event date

Aug 28, 2023

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

001238045900063