Chandra, Jyoti, Paul, Debajyoti, Stracke, Andreas, Chabaux, François, Granet, Mathieu (2019) The Origin of Carbonatites from Amba Dongar within the Deccan Large Igneous Province. Journal of Petrology, 60 (6) 1119-1134 doi:10.1093/petrology/egz026
| Reference Type | Journal (article/letter/editorial) | ||
|---|---|---|---|
| Title | The Origin of Carbonatites from Amba Dongar within the Deccan Large Igneous Province | ||
| Journal | Journal of Petrology | ||
| Authors | Chandra, Jyoti | Author | |
| Paul, Debajyoti | Author | ||
| Stracke, Andreas | Author | ||
| Chabaux, François | Author | ||
| Granet, Mathieu | Author | ||
| Year | 2019 (June 1) | Volume | 60 |
| Issue | 6 | ||
| Publisher | Oxford University Press (OUP) | ||
| DOI | doi:10.1093/petrology/egz026Search in ResearchGate | ||
| Generate Citation Formats | |||
| Mindat Ref. ID | 176551 | Long-form Identifier | mindat:1:5:176551:3 |
| GUID | 0 | ||
| Full Reference | Chandra, Jyoti, Paul, Debajyoti, Stracke, Andreas, Chabaux, François, Granet, Mathieu (2019) The Origin of Carbonatites from Amba Dongar within the Deccan Large Igneous Province. Journal of Petrology, 60 (6) 1119-1134 doi:10.1093/petrology/egz026 | ||
| Plain Text | Chandra, Jyoti, Paul, Debajyoti, Stracke, Andreas, Chabaux, François, Granet, Mathieu (2019) The Origin of Carbonatites from Amba Dongar within the Deccan Large Igneous Province. Journal of Petrology, 60 (6) 1119-1134 doi:10.1093/petrology/egz026 | ||
| In | (2019, June) Journal of Petrology Vol. 60 (6) Oxford University Press (OUP) | ||
| Abstract/Notes | Abstract There are disparate views about the origin of global rift- or plume-related carbonatites. The Amba Dongar carbonatite complex, Gujarat, India, which intruded into the basalts of the Deccan Large Igneous Province (LIP), is a typical example. On the basis of new comprehensive major and trace element and Sr–Nd–Pb isotope data, we propose that low-degree primary carbonated melts from off-center of the Deccan–Réunion mantle plume migrate upwards and metasomatize part of the subcontinental lithospheric mantle (SCLM). Low-degree partial melting (∼2%) of this metasomatized SCLM source generates a parental carbonated silicate magma, which becomes contaminated with the local Archean basement during its ascent. Calcite globules in a nephelinite from Amba Dongar provide evidence that the carbonatites originated by liquid immiscibility from a parental carbonated silicate magma. Liquid immiscibility at crustal depths produces two chemically distinct, but isotopically similar magmas: the carbonatites (20% by volume) and nephelinites (80% by volume). Owing to their low heat capacity, the carbonatite melts solidified as thin carbonate veins at crustal depths. Secondary melting of these carbonate-rich veins during subsequent rifting generated the carbonatites and ferrocarbonatites now exposed at Amba Dongar. Carbonatites, if formed by liquid immiscibility from carbonated silicate magmas, can inherit a wide range of isotopic signatures that result from crustal contamination of their parental carbonated silicate magmas. In rift or plume-related settings, they can, therefore, display a much larger range of isotope signatures than their original asthenosphere or mantle plume source. | ||
Map of Localities
Locality Pages
| Locality | Citation Details |
|---|---|
| Amba Dongar complex, Kavant Taluka, Chhota Udaipur District, Gujarat, India |
See Also
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