Petrogenesis of the 1.85 Ga Sonakhan mafic dyke swarm, Bastar Craton, India

J. G. Shellnutt, K. R. Hari, A. C.Y. Liao, S. W. Denyszyn, N. Vishwakarma, S. D. Deshmukh

研究成果: 雜誌貢獻文章

1 引文 (Scopus)

摘要

The NNW trending tholeiitic Sonakhan mafic dyke swarm of the Northern Bastar Craton is comprised of basalt to basaltic andesite (SiO 2 = 46.3 wt% to 55.3 wt%; Mg# = 37 to 70) dykes. A single basaltic dyke yielded a weighted-mean 207 Pb/ 206 Pb baddeleyite age of 1851.1 ± 2.6 Ma. The Sr and Nd isotopes ( 87 Sr/ 86 Sr i = 0.70396 to 0.70855; ε Nd (t) = −5.7 to +2.0) are variable which is a consequence of crustal contamination. Trace element modeling suggests the dykes were likely derived by partial melting of a spinel-bearing mantle source. The Sonakhan dykes are 30 million years younger than the 1.88 Ga Bastar-Cuddapah dykes (Bastanar-Hampi swarm) of the southern and central Bastar Craton indicating they represent a distinct period of magmatism. However, much like the 1.88 Ga dykes, the Sonakhan dykes appear to be correlative with dykes from the Yilgarn Craton (Yalgoo dyke = 1854 ± 5 Ma) of Western Australia. The temporal and compositional similarity of the Sonakhan dykes with the Yalgoo dyke is evidence that they are petrologically related and may represent different branches of the same dyke swarm. The existence of two distinct Paleoproterozoic dyke swarms in the Bastar Craton that each have a correlative unit in the Yilgarn Craton is supportive of a link between India and Australia before 1.9 Ga. Moreover, it suggests that the break-up of India and Western Australia was protracted and lasted for at least 30 million years.

原文英語
頁(從 - 到)88-101
頁數14
期刊Lithos
334-335
DOIs
出版狀態已發佈 - 2019 六月 1

指紋

Bearings (structural)
dike swarm
Trace Elements
petrogenesis
Isotopes
craton
Melting
Contamination
dike
baddeleyite
crustal contamination
mantle source
andesite
spinel
partial melting
magmatism
basalt
spinell
trace element
isotope

ASJC Scopus subject areas

  • Geology
  • Geochemistry and Petrology

引用此文

Shellnutt, J. G., Hari, K. R., Liao, A. C. Y., Denyszyn, S. W., Vishwakarma, N., & Deshmukh, S. D. (2019). Petrogenesis of the 1.85 Ga Sonakhan mafic dyke swarm, Bastar Craton, India. Lithos, 334-335, 88-101. https://doi.org/10.1016/j.lithos.2019.03.015

Petrogenesis of the 1.85 Ga Sonakhan mafic dyke swarm, Bastar Craton, India. / Shellnutt, J. G.; Hari, K. R.; Liao, A. C.Y.; Denyszyn, S. W.; Vishwakarma, N.; Deshmukh, S. D.

於: Lithos, 卷 334-335, 01.06.2019, p. 88-101.

研究成果: 雜誌貢獻文章

Shellnutt, JG, Hari, KR, Liao, ACY, Denyszyn, SW, Vishwakarma, N & Deshmukh, SD 2019, 'Petrogenesis of the 1.85 Ga Sonakhan mafic dyke swarm, Bastar Craton, India', Lithos, 卷 334-335, 頁 88-101. https://doi.org/10.1016/j.lithos.2019.03.015
Shellnutt JG, Hari KR, Liao ACY, Denyszyn SW, Vishwakarma N, Deshmukh SD. Petrogenesis of the 1.85 Ga Sonakhan mafic dyke swarm, Bastar Craton, India. Lithos. 2019 6月 1;334-335:88-101. https://doi.org/10.1016/j.lithos.2019.03.015
Shellnutt, J. G. ; Hari, K. R. ; Liao, A. C.Y. ; Denyszyn, S. W. ; Vishwakarma, N. ; Deshmukh, S. D. / Petrogenesis of the 1.85 Ga Sonakhan mafic dyke swarm, Bastar Craton, India. 於: Lithos. 2019 ; 卷 334-335. 頁 88-101.
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abstract = "The NNW trending tholeiitic Sonakhan mafic dyke swarm of the Northern Bastar Craton is comprised of basalt to basaltic andesite (SiO 2 = 46.3 wt{\%} to 55.3 wt{\%}; Mg# = 37 to 70) dykes. A single basaltic dyke yielded a weighted-mean 207 Pb/ 206 Pb baddeleyite age of 1851.1 ± 2.6 Ma. The Sr and Nd isotopes ( 87 Sr/ 86 Sr i = 0.70396 to 0.70855; ε Nd (t) = −5.7 to +2.0) are variable which is a consequence of crustal contamination. Trace element modeling suggests the dykes were likely derived by partial melting of a spinel-bearing mantle source. The Sonakhan dykes are 30 million years younger than the 1.88 Ga Bastar-Cuddapah dykes (Bastanar-Hampi swarm) of the southern and central Bastar Craton indicating they represent a distinct period of magmatism. However, much like the 1.88 Ga dykes, the Sonakhan dykes appear to be correlative with dykes from the Yilgarn Craton (Yalgoo dyke = 1854 ± 5 Ma) of Western Australia. The temporal and compositional similarity of the Sonakhan dykes with the Yalgoo dyke is evidence that they are petrologically related and may represent different branches of the same dyke swarm. The existence of two distinct Paleoproterozoic dyke swarms in the Bastar Craton that each have a correlative unit in the Yilgarn Craton is supportive of a link between India and Australia before 1.9 Ga. Moreover, it suggests that the break-up of India and Western Australia was protracted and lasted for at least 30 million years.",
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AU - Shellnutt, J. G.

AU - Hari, K. R.

AU - Liao, A. C.Y.

AU - Denyszyn, S. W.

AU - Vishwakarma, N.

AU - Deshmukh, S. D.

PY - 2019/6/1

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N2 - The NNW trending tholeiitic Sonakhan mafic dyke swarm of the Northern Bastar Craton is comprised of basalt to basaltic andesite (SiO 2 = 46.3 wt% to 55.3 wt%; Mg# = 37 to 70) dykes. A single basaltic dyke yielded a weighted-mean 207 Pb/ 206 Pb baddeleyite age of 1851.1 ± 2.6 Ma. The Sr and Nd isotopes ( 87 Sr/ 86 Sr i = 0.70396 to 0.70855; ε Nd (t) = −5.7 to +2.0) are variable which is a consequence of crustal contamination. Trace element modeling suggests the dykes were likely derived by partial melting of a spinel-bearing mantle source. The Sonakhan dykes are 30 million years younger than the 1.88 Ga Bastar-Cuddapah dykes (Bastanar-Hampi swarm) of the southern and central Bastar Craton indicating they represent a distinct period of magmatism. However, much like the 1.88 Ga dykes, the Sonakhan dykes appear to be correlative with dykes from the Yilgarn Craton (Yalgoo dyke = 1854 ± 5 Ma) of Western Australia. The temporal and compositional similarity of the Sonakhan dykes with the Yalgoo dyke is evidence that they are petrologically related and may represent different branches of the same dyke swarm. The existence of two distinct Paleoproterozoic dyke swarms in the Bastar Craton that each have a correlative unit in the Yilgarn Craton is supportive of a link between India and Australia before 1.9 Ga. Moreover, it suggests that the break-up of India and Western Australia was protracted and lasted for at least 30 million years.

AB - The NNW trending tholeiitic Sonakhan mafic dyke swarm of the Northern Bastar Craton is comprised of basalt to basaltic andesite (SiO 2 = 46.3 wt% to 55.3 wt%; Mg# = 37 to 70) dykes. A single basaltic dyke yielded a weighted-mean 207 Pb/ 206 Pb baddeleyite age of 1851.1 ± 2.6 Ma. The Sr and Nd isotopes ( 87 Sr/ 86 Sr i = 0.70396 to 0.70855; ε Nd (t) = −5.7 to +2.0) are variable which is a consequence of crustal contamination. Trace element modeling suggests the dykes were likely derived by partial melting of a spinel-bearing mantle source. The Sonakhan dykes are 30 million years younger than the 1.88 Ga Bastar-Cuddapah dykes (Bastanar-Hampi swarm) of the southern and central Bastar Craton indicating they represent a distinct period of magmatism. However, much like the 1.88 Ga dykes, the Sonakhan dykes appear to be correlative with dykes from the Yilgarn Craton (Yalgoo dyke = 1854 ± 5 Ma) of Western Australia. The temporal and compositional similarity of the Sonakhan dykes with the Yalgoo dyke is evidence that they are petrologically related and may represent different branches of the same dyke swarm. The existence of two distinct Paleoproterozoic dyke swarms in the Bastar Craton that each have a correlative unit in the Yilgarn Craton is supportive of a link between India and Australia before 1.9 Ga. Moreover, it suggests that the break-up of India and Western Australia was protracted and lasted for at least 30 million years.

KW - Bastar Craton

KW - Geochemistry

KW - Geochronology

KW - Mafic dyke swarm

KW - Paleoproterozoic

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