Carbon Isotope Characteristics as Evidence of an External Source of High-Temperature Granitoids in Granulite Complexes

O. G. Safonov; V. N. Reutsky; V. D. Shcherbakov; M. A. Golunova; D. A. Varlamov; V. O. Yapaskurt; D. D. van Reenen

doi:10.1134/S1028334X18120097

Carbon Isotope Characteristics as Evidence of an External Source of High-Temperature Granitoids in Granulite Complexes

O. G. Safonov, V. N. Reutsky, V. D. Shcherbakov, M. A. Golunova, D. A. Varlamov, V. O. Yapaskurt, D. D. van Reenen

Geology

Research output: Contribution to journal › Article › peer-review

Abstract

Abstract: Data on the carbon isotope composition of graphite and CO ₂ from inclusions in quartz of granitoids of the Southern Marginal Zone (SMZ) of the Limpopo granulite belt, South Africa, are presented. The average values of δ ¹³ C for graphite and СО ₂ from fluid inclusions in quartz are found within the range that is typical of deep (mantle) carbon sources. The data are evidence of an external source of granitoid magmas. They are likely to be hybrid rocks that appeared during assimilation of host metapelites by trondhjemite magmas, while graphite in trondhjemites and granodiorites is a product of high-temperature (~900–1000°С) evolution of the CO ₂ -rich fluid phase of granitoid magmas when they intrude the rocks of the granulite complex and was formed during assimilation that led to reduction of CO ₂ when sulfide-bearing metapelite material was contaminated by the magma.

Original language	English
Pages (from-to)	1515-1518
Number of pages	4
Journal	Doklady Earth Sciences
Volume	483
Issue number	2
DOIs	https://doi.org/10.1134/S1028334X18120097
Publication status	Published - 1 Dec 2018

ASJC Scopus subject areas

Earth and Planetary Sciences (miscellaneous)
General Earth and Planetary Sciences

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title = "Carbon Isotope Characteristics as Evidence of an External Source of High-Temperature Granitoids in Granulite Complexes",

abstract = " Abstract: Data on the carbon isotope composition of graphite and CO 2 from inclusions in quartz of granitoids of the Southern Marginal Zone (SMZ) of the Limpopo granulite belt, South Africa, are presented. The average values of δ 13 C for graphite and СО 2 from fluid inclusions in quartz are found within the range that is typical of deep (mantle) carbon sources. The data are evidence of an external source of granitoid magmas. They are likely to be hybrid rocks that appeared during assimilation of host metapelites by trondhjemite magmas, while graphite in trondhjemites and granodiorites is a product of high-temperature (~900–1000°С) evolution of the CO 2 -rich fluid phase of granitoid magmas when they intrude the rocks of the granulite complex and was formed during assimilation that led to reduction of CO 2 when sulfide-bearing metapelite material was contaminated by the magma.",

author = "Safonov, {O. G.} and Reutsky, {V. N.} and Shcherbakov, {V. D.} and Golunova, {M. A.} and Varlamov, {D. A.} and Yapaskurt, {V. O.} and {van Reenen}, {D. D.}",

note = "Publisher Copyright: {\textcopyright} 2018, Pleiades Publishing, Ltd.",

year = "2018",

month = dec,

day = "1",

doi = "10.1134/S1028334X18120097",

language = "English",

volume = "483",

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T1 - Carbon Isotope Characteristics as Evidence of an External Source of High-Temperature Granitoids in Granulite Complexes

AU - Safonov, O. G.

AU - Reutsky, V. N.

AU - Shcherbakov, V. D.

AU - Golunova, M. A.

AU - Varlamov, D. A.

AU - Yapaskurt, V. O.

AU - van Reenen, D. D.

PY - 2018/12/1

Y1 - 2018/12/1

N2 - Abstract: Data on the carbon isotope composition of graphite and CO 2 from inclusions in quartz of granitoids of the Southern Marginal Zone (SMZ) of the Limpopo granulite belt, South Africa, are presented. The average values of δ 13 C for graphite and СО 2 from fluid inclusions in quartz are found within the range that is typical of deep (mantle) carbon sources. The data are evidence of an external source of granitoid magmas. They are likely to be hybrid rocks that appeared during assimilation of host metapelites by trondhjemite magmas, while graphite in trondhjemites and granodiorites is a product of high-temperature (~900–1000°С) evolution of the CO 2 -rich fluid phase of granitoid magmas when they intrude the rocks of the granulite complex and was formed during assimilation that led to reduction of CO 2 when sulfide-bearing metapelite material was contaminated by the magma.

AB - Abstract: Data on the carbon isotope composition of graphite and CO 2 from inclusions in quartz of granitoids of the Southern Marginal Zone (SMZ) of the Limpopo granulite belt, South Africa, are presented. The average values of δ 13 C for graphite and СО 2 from fluid inclusions in quartz are found within the range that is typical of deep (mantle) carbon sources. The data are evidence of an external source of granitoid magmas. They are likely to be hybrid rocks that appeared during assimilation of host metapelites by trondhjemite magmas, while graphite in trondhjemites and granodiorites is a product of high-temperature (~900–1000°С) evolution of the CO 2 -rich fluid phase of granitoid magmas when they intrude the rocks of the granulite complex and was formed during assimilation that led to reduction of CO 2 when sulfide-bearing metapelite material was contaminated by the magma.

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DO - 10.1134/S1028334X18120097

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SN - 1028-334X

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JO - Doklady Earth Sciences

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Carbon Isotope Characteristics as Evidence of an External Source of High-Temperature Granitoids in Granulite Complexes

Abstract

ASJC Scopus subject areas

UN SDGs

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