Geochemistry of Zircon from Pegmatite-bearing Leucogranites of the Laghman Complex, Nuristan Province, Afghanistan

Ekaterina V. Levashova; Sergey Skublov; Nazifulla Hamdard; Mihail Ivanov; Vladislav Stativko

doi:10.2205/2024ES000916

VAK Russia 1.6 UDC 54 CSCSTI 37.01 Russian Classification of Professions by Education 05.00.00 Russian Library and Bibliographic Classification 26 Russian Trade and Bibliographic Classification 63 BISAC SCI UDC 55 UDC 550.34 UDC 550.383 CSCSTI 37.15 CSCSTI 37.25 CSCSTI 37.31 CSCSTI 38.01 CSCSTI 36.00 CSCSTI 37.00 CSCSTI 38.00 CSCSTI 39.00 CSCSTI 52.00

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GEOCHEMISTRY OF ZIRCON FROM PEGMATITE-BEARING LEUCOGRANITES OF THE LAGHMAN COMPLEX, NURISTAN PROVINCE, AFGHANISTAN Geochemistry of Zircon from Pegmatite-bearing Leucogranites of the Laghman Complex, Nuristan Province, Afghanistan

АА Аа

Published in Russian Journal of Earth Sciences · Volume 24, Issue 2 · Pages 1–13 · Rubric: ORIGINAL ARTICLES

DOI: https://doi.org/10.2205/2024ES000916 · EDN: PRIEFZ

Received: 03.05.2024 Accepted: 13.06.2024 Published: 20.06.2024

Authors

Ekaterina V. Levashova

ORCID

Sergey Skublov

ORCID

Nazifulla Hamdard

ORCID

Mihail Ivanov

ORCID

et al.

Vladislav Stativko

ORCID

Ekaterina V. Levashova

Academic degree: candidate of geological and mineralogical sciences

Institute of Precambrian Geology and Geochronology, Russian Academy of Sciences Russian Federation

ORCID

Sergey Skublov

Academic degree: doctor of geological and mineralogical sciences

Institute of Precambrian Geology and Geochronology Russian Federation · Saint Petersburg

Empress Catherine II St. Petersburg Mining University Russian Federation · Saint Petersburg

ORCID

Nazifulla Hamdard

Empress Catherine II St. Petersburg Mining University Russian Federation

ORCID

Mihail Ivanov

Empress Catherine II St. Petersburg Mining University Russian Federation

ORCID

Vladislav Stativko

Institute of Precambrian Geology and Geochronology, Russian Academy of Sciences Russian Federation

Empress Catherine II St. Petersburg Mining University Russian Federation

ORCID

ABSTRACT

For the first time, a study was carried out on the geochemistry of zircon (SIMS method, 2 samples, 20 points) from leucogranites of the Laghman complex, located in the pegmatite-bearing (LCT-type) province of Nuristan (Afghanistan). Zircon is characterized by a high Hf content (up to 34 500 ppm), which tends to increase towards the edges of the grains. An increase in the content of Li, Ca, and U is correlated with an increase in Hf. The content of Ti varies slightly and corresponds to the crystallization temperature of zircon about 700 ∘C. The pattern of REE distribution is unusual. In most grains there is no positive Ce-anomaly, which is not typical for igneous zircon. For a number of grains, the marginal zones are distinguished by a reduced content of REE and a flat distribution pattern of light REE. The reason for this distribution of REE and the absence of Ce-anomaly is probably the joint crystallization of zircon with titanite, which concentrates REE and affects the fractionation of light REE. A comparison of the studied zircon with zircon from other leucogranites, including those considered as parental for LCT pegmatites, showed a high degree of fractionation of the melt of leucogranites of the Laghman complex, manifested in a high content of a number of trace elements (Hf, U and others). Therefore, the previously stated assumption about the genetic connection of leucogranites of the Laghman complex and large pegmatite lithium deposits, widely represented in the Nuristan province, in northeastern Afghanistan, is confirmed by new data on zircon geochemistry.

KEYWORDS

zircon, geochemistry of trace elements, geochemistry of rare earth elements, leucogranites, Laghman complex, Nuristan.

Funding

The authors thank O. L. Galankina (IGGG RAS), S. G. Simakin and E. V. Potapov (YaF FTIAN) for their assistance in analytical studies of zircon. The work was carried out within the framework of the state assignment of IGGG RAS (FMUW-2022-0005).

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GOST

Levashova E. V., Skublov S. G., Hamdard N., Ivanov M. A., Stativko V. S. Geochemistry of Zircon from Pegmatite-bearing Leucogranites of the Laghman Complex, Nuristan Province, Afghanistan // Russian Journal of Earth Sciences. 2024. no. 2. pp. 1-13. DOI: https://doi.org/10.2205/2024ES000916. EDN: PRIEFZ. (Date of access 03.10.2026).

MLA

Ekaterina V. Levashova, Skublov S. G., Hamdard N., Ivanov M. A., Stativko V. S.. "Geochemistry of Zircon from Pegmatite-bearing Leucogranites of the Laghman Complex, Nuristan Province, Afghanistan." Russian Journal of Earth Sciences 24.2 (2024): 1-13. DOI: https://doi.org/10.2205/2024ES000916. EDN: PRIEFZ.

APA

Levashova E. V., Skublov S. G., Hamdard N., Ivanov M. A., Stativko V. S. (2024). Geochemistry of Zircon from Pegmatite-bearing Leucogranites of the Laghman Complex, Nuristan Province, Afghanistan. Russian Journal of Earth Sciences, 24(2), 1-13. https://doi.org/10.2205/2024ES000916 EDN: PRIEFZ.

Chicago

Ekaterina V. Levashova, Skublov S. G., Hamdard N., Ivanov M. A., Stativko V. S.. "Geochemistry of Zircon from Pegmatite-bearing Leucogranites of the Laghman Complex, Nuristan Province, Afghanistan." Russian Journal of Earth Sciences 24, no. 2 (2024): 1-13. https://doi.org/10.2205/2024ES000916. EDN: PRIEFZ.

WIKI

{{cite journal | author = Levashova E. V., Skublov S. G., Hamdard N., Ivanov M. A., Stativko V. S. | title = Geochemistry of Zircon from Pegmatite-bearing Leucogranites of the Laghman Complex, Nuristan Province, Afghanistan | journal = Russian Journal of Earth Sciences | year = 2024 | volume = 24 | issue = 2 | pages = 1-13 | doi = 10.2205/2024ES000916 }} EDN: PRIEFZ

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GEOCHEMISTRY OF ZIRCON FROM PEGMATITE-BEARING LEUCOGRANITES OF THE LAGHMAN COMPLEX, NURISTAN PROVINCE, AFGHANISTAN Geochemistry of Zircon from Pegmatite-bearing Leucogranites of the Laghman Complex, Nuristan Province, Afghanistan

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