Pegmatite REE-mineral association from the Kroushev Dol base
metal deposit (south Bulgaria): mineral replacements and timing
of formation

D 2023

Pegmatite REE-mineral association from the Kroushev Dol base metal deposit (south Bulgaria): mineral replacements and timing of formation

VASSILEVA, Rossitsa D; Sylvina GEORGIEVA; Georgi MILENKOV; Jan CEMPÍREK; Radek ŠKODA et. al.

Basic information

Original name

Pegmatite REE-mineral association from the Kroushev Dol base metal deposit (south Bulgaria): mineral replacements and timing of formation

Authors

VASSILEVA, Rossitsa D; Sylvina GEORGIEVA; Georgi MILENKOV; Jan CEMPÍREK (203 Czech Republic, belonging to the institution); Radek ŠKODA (203 Czech Republic, belonging to the institution); Elitsa STEFANOVA; Valentin GROZDEV and Irena PEYTCHEVA

Edition

Geneva, 17th Biennial SGA Meeting - Proceedings Volume 1, p. 242-245, 4 pp. 2023

Publisher

Society for Geology Applied to Mineral Deposits

Other information

Language

English

Type of outcome

Proceedings paper

Field of Study

10505 Geology

Country of publisher

Switzerland

Confidentiality degree

is not subject to a state or trade secret

Publication form

printed version "print"

References:

URL

Organization unit

Faculty of Science

ISBN

978-2-8399-4044-3

UT WoS

001238045900064

Keywords in English

Central Rhodopes; Pb-Zn deposits; Madan district; South Bulgaria

Abstract

In the original language

The region of the Central Rhodopes, south Bulgaria, is known for large Pb-Zn deposits located in the Madan and Laki districts. The economic sulphide mineralization is hosted by the high-grade rocks of the Rhodope metamorphic complex. Mining operations revealed that pegmatite injections into the host gneisses, amphibolites and marbles represent a substantial part of the wall rocks in depth. Mineral composition of these dykes is represented by K-feldspar, plagioclases, and quartz as major constituents. In the pegmatites from the Kroushev Dol deposit (Madan district), REE-bearing mineralization includes accessory monazite, zircon, apatite, allanite, titanite, and thorite. Primary minerals of REE are monazite (LREE) and zircon (HREE); the REE were consequently redistributed among secondary apatite, allanite, thorite, and titanite. Common mineral breakdowns (e.g. oligoclase to albite; monazite to apatite; allanite to epidote; titanite to anatase) and replacement of the primary pegmatite minerals by the epidote-chlorite-carbonate association were caused by hydrothermal alteration by acid Pb-Zn ore-precipitating fluids. There seems to be no genetic link between the pegmatite emplacement and the economic galena-sphalerite accumulations and the U-Pb geochronometry on monazite, zircon and titanite proved that pegmatite formation (similar to 40 Ma) significantly precedes the origin of the base metal mineralization (similar to 30 Ma).

Links

TH79020002, research and development project

Name: Vyvinuté magmatické a pegmatitové systémy jako zdroje kritických surovin a průmyslových minerálů (Acronym: PegMat)

Investor: Technology Agency of the Czech Republic, Evolved magmatic and pegmatitic systems as sources of lithium, critical raw materials, and industrial mineral, ERA-MIN 2

Cite

VASSILEVA, Rossitsa D; Sylvina GEORGIEVA; Georgi MILENKOV; Jan CEMPÍREK; Radek ŠKODA; Elitsa STEFANOVA; Valentin GROZDEV and Irena PEYTCHEVA. Pegmatite REE-mineral association from the Kroushev Dol base metal deposit (south Bulgaria): mineral replacements and timing of formation. In Chelle-Michou Cyril, Saintilan Nicolas. 17th Biennial SGA Meeting - Proceedings Volume 1. Geneva: Society for Geology Applied to Mineral Deposits, 2023, p. 242-245. ISBN 978-2-8399-4044-3.

@inproceedings{2520458,
   author = {Vassileva, Rossitsa D and Georgieva, Sylvina and Milenkov, Georgi and Cempírek, Jan and Škoda, Radek and Stefanova, Elitsa and Grozdev, Valentin and Peytcheva, Irena},
   address = {Geneva},
   booktitle = {17th Biennial SGA Meeting - Proceedings Volume 1},
   editor = {Chelle-Michou Cyril, Saintilan Nicolas},
   keywords = {Central Rhodopes; Pb-Zn deposits; Madan district; South Bulgaria},
   howpublished = {tištěná verze "print"},
   language = {eng},
   location = {Geneva},
   isbn = {978-2-8399-4044-3},
   pages = {242-245},
   publisher = {Society for Geology Applied to Mineral Deposits},
   title = {Pegmatite REE-mineral association from the Kroushev Dol base metal deposit (south Bulgaria): mineral replacements and timing of formation},
   url = {https://www.e-sga.org/fileadmin/PDF/Conference_proceedings/Zuerich/SGA_2023_Zurich_Volume_1.pdf},
   year = {2023}
}

TY  - CONF
ID  - 2520458
AU  - Vassileva, Rossitsa D - Georgieva, Sylvina - Milenkov, Georgi - Cempírek, Jan - Škoda, Radek - Stefanova, Elitsa - Grozdev, Valentin - Peytcheva, Irena
PY  - 2023
TI  - Pegmatite REE-mineral association from the Kroushev Dol base metal deposit (south Bulgaria): mineral replacements and timing of formation
PB  - Society for Geology Applied to Mineral Deposits
CY  - Geneva
SN  - 9782839940443
KW  - Central Rhodopes
KW  - Pb-Zn deposits
KW  - Madan district
KW  - South Bulgaria
UR  - https://www.e-sga.org/fileadmin/PDF/Conference_proceedings/Zuerich/SGA_2023_Zurich_Volume_1.pdf
N2  - The region of the Central Rhodopes, south Bulgaria, is known for large Pb-Zn deposits located in the Madan and Laki districts. The economic sulphide mineralization is hosted by the high-grade rocks of the Rhodope metamorphic complex. Mining operations revealed that pegmatite injections into the host gneisses, amphibolites and marbles represent a substantial part of the wall rocks in depth. Mineral composition of these dykes is represented by K-feldspar, plagioclases, and quartz as major constituents. In the pegmatites from the Kroushev Dol deposit (Madan district), REE-bearing mineralization includes accessory monazite, zircon, apatite, allanite, titanite, and thorite. Primary minerals of REE are monazite (LREE) and zircon (HREE); the REE were consequently redistributed among secondary apatite, allanite, thorite, and titanite. Common mineral breakdowns (e.g. oligoclase to albite; monazite to apatite; allanite to epidote; titanite to anatase) and replacement of the primary pegmatite minerals by the epidote-chlorite-carbonate association were caused by hydrothermal alteration by acid Pb-Zn ore-precipitating fluids. There seems to be no genetic link between the pegmatite emplacement and the economic galena-sphalerite accumulations and the U-Pb geochronometry on monazite, zircon and titanite proved that pegmatite formation (similar to 40 Ma) significantly precedes the origin of the base metal mineralization (similar to 30 Ma).
ER  -

VASSILEVA, Rossitsa D; Sylvina GEORGIEVA; Georgi MILENKOV; Jan CEMPÍREK; Radek ŠKODA; Elitsa STEFANOVA; Valentin GROZDEV and Irena PEYTCHEVA. Pegmatite REE-mineral association from the Kroushev Dol base metal deposit (south Bulgaria): mineral replacements and timing of formation. In Chelle-Michou Cyril, Saintilan Nicolas. \textit{17th Biennial SGA Meeting - Proceedings Volume 1}. Geneva: Society for Geology Applied to Mineral Deposits, 2023, p.~242-245. ISBN~978-2-8399-4044-3.

Přehled o publikaci