Origin and evolution of ferrogabbro-anorthosite suite of rocks from the Neoproterozoic Koraput alkaline complex, India: Implication for the Rodinia breakup
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985831%3A_____%2F25%3A00637575" target="_blank" >RIV/67985831:_____/25:00637575 - isvavai.cz</a>
Result on the web
<a href="https://www.sciencedirect.com/science/article/pii/S0024493725001707" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0024493725001707</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.lithos.2025.108111" target="_blank" >10.1016/j.lithos.2025.108111</a>
Alternative languages
Result language
angličtina
Original language name
Origin and evolution of ferrogabbro-anorthosite suite of rocks from the Neoproterozoic Koraput alkaline complex, India: Implication for the Rodinia breakup
Original language description
The origin and evolution of the Koraput Alkaline Complex (KAC), situated in the western part of the Eastern Ghats Granulite Belt (EGGB), India, have long been debated. The complex consists of a variety of rock types including ferrogabbro, foid gabbro (or essexite), hornblendite, nepheline syenite, syenite, and some anorthositic variants. Comprehensive petrology, geochemistry and geochronology of the rock types carried out in this study provides a critical assessment of their petrogenetic linkage with past supercontinent cycle. Using quantitative geochemical modelling, we explain geochemical variability of the lithounits from a high aluminous parental melt, equivalent to fine-grained ferrogabbro representative of the complex. The geochemical modelling using alpha-MELTS indicates that anorthosite, essexite, and hornblendite are the product of fractional crystallisation whereas, ferrogabbro formed by equilibrium crystallisation from the residual melt. On the other hand, nepheline syenite and syenite are the product of assimilation-fractional crystallisation (AFC) from a hybridized melt assimilating the continental crust within which the parental magma was emplaced. Whole rock geochemistry of parental magma, along with Hf isotopic ratios of the zircons of nepheline syenite and anorthosite, suggest subcontinental lithospheric mantle (SCLM) source for the KAC primary melt in an intraplate tectonic setting. The primary melt had a high Mg# (71), and was formed at a mantle potential temperature and pressure of 1570 ◦C and 3.45 GPa respectively. U-Pb dating of zircon from nepheline syenite and anorthosite suggests that the KAC was emplaced between 741.8 ± 2.9 and 732.2 ± 2.8 Ma, which bears implication for the Rodinia supercontinent breakup.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10505 - Geology
Result continuities
Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Lithos
ISSN
0024-4937
e-ISSN
1872-6143
Volume of the periodical
508-509
Issue of the periodical within the volume
September
Country of publishing house
NL - THE KINGDOM OF THE NETHERLANDS
Number of pages
23
Pages from-to
108111
UT code for WoS article
001491740600002
EID of the result in the Scopus database
2-s2.0-105004935203