Basalt basement from the Kerguelen Plateau and the trail of a Dupal plume

Davies, H. L.; Sun, Shen-Su; Frey, Frederick A.; Gautier, I.; McCulloch, Malcolm T.; Price, Richard; Bassias, Y.; Klootwijk, Chris; Leclaire, L.

doi:10.1007/bf01041753

Cited by 92 publications

(51 citation statements)

References 55 publications

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“…4; Markl, 1974Markl, , 1978Larson et al, 1979;Fullerton et al, 1989) after an extended rift phase that began in Permian time (von Rad and Exon, 1982). The Bunbury basalts of Western Australia were erupted just before the onset of spreading (Playford et al, 1976;Davies et al, 1989). If Greater India behaved as a rigid plate, continental extension and possible seafloor spreading are required between Greater India and Antarctica.…”

Section: Ma (M10)-valanginianmentioning

confidence: 99%

“…The Rajmahal Traps in northeastern India have been dated at 115 Ma and interpreted as the first manifestation of the Kerguelen hotspot (Duncan, 1978;Curray et al, 1982;Mahoney et al, 1983;Davies et al, 1989). The source of the Naturaliste Plateau as well as the Bunbury basalts of southwest Australia, which have ages that range from 136 to 105 Ma (Playford et al, 1976), may also have been the Kerguelen hotspot (Leclaire et al, 1987;Davies et al, 1989).…”

Section: Ma-albianmentioning

confidence: 99%

“…In some cases, rifting preceded breakup by many tens of millions of years, and extensive volcanism and associated intrusions commonly accompanied the rifting (e.g., Hinz, 1981;Cox, 1988;Mahoney, 1988;Davies et al, 1989). Jurassic through Eocene seafloor spreading in the Indian Ocean region occurred in five major phases (Table 1).…”

Section: Reconstructionsmentioning

confidence: 99%

“…When was the first crustal expression of the Kerguelen hotspot, and how did it move through time (cf. Duncan, 1978;Mahoney et al, 1983;Davies et al, 1989;Storey et al, 1989)? 6. When and why did seafloor spreading cease in the Western Somali Basin?…”

Section: Major Remaining Questionsmentioning

confidence: 99%

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Jurassic to Eocene Plate Tectonic Reconstructions in the Kerguelen Plateau Region

Royer¹,

Coffin²

1992

Proceedings of the Ocean Drilling Program

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Section: Ma (M10)-valanginianmentioning

confidence: 99%

Section: Ma-albianmentioning

confidence: 99%

Section: Reconstructionsmentioning

confidence: 99%

Section: Major Remaining Questionsmentioning

confidence: 99%

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Jurassic to Eocene Plate Tectonic Reconstructions in the Kerguelen Plateau Region

Royer¹,

Coffin²

1992

Proceedings of the Ocean Drilling Program

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“…The Kerguelen plume may be a carrier of the DUPAL isotopic anomalies that are characteristic of the basalts that are erupted in the southern hemisphere Hart, 1984, and the interaction of this plume with the Indian Ocean lithosphere has potentially affected the geochemistry of the entire southeastern Indian Ocean Davies et al, 1989;Mahoney et al, 1989.…”

Section: The Kerguelen Plume and The Scope Of The Thesismentioning

confidence: 99%

Plume-lithosphere interaction : geochemical evidence from upper mantle and lower crusal Xenoliths from the Kerguelen Islands

Hassler¹

1999

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This study is a geochemical investigation ofthe evolution of the Kerguelen plume, on the basis ofupper mantle and lower crustal xenoliths. Ultramafic xenoliths include harzburgites predominant, a lherzolite, dunites and pyroxenites, whereas lower crustal xenoliths are cumulate gabbros recrystallized under granulite facies conditions. On the basis of the whole rock major element characteristics and trace element abundance patterns in clinopyroxenes, the harzburgites were found to be residues of extensive melting at high pressures within the Kerguelen plume. These were then recrystallized at low pressures and metasomatized by plume generated melts. Details ofthe metasomatic process were determined from trace element variations in clinopyroxene in connection to texture. This demonstrated that meltrock reaction and the precipitation ofnew clinopyroxenes occurred by metasomatic carbonatitic melts.It was also found that some ofthe harzburgites had distinctly unradiogenic Os isotopic compositions and were identified as originating from the sub-Gondwanaland lithosphere. On the basis of major and trace element compositions, the granulite xenoliths were found to be originally gabbroic cumulates formed from plume-derivedbasaltic melts emplaced at the base of the crust by underplating and subsequently recrystallized isobarically under granulite conditions. The Sr, Nd and Os isotopic compositions of the peridotite and granulite xenoliths demonstrate that the Kerguelen plume is isotopically heterogeneous and displays a temporal progression toward more enriched Sr and Nd isotopic compositions from the Ninetyeast Ridge to granulite xenoliths to Kerguelen basalts and Heard Island basalts. 4Acknowledgments

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Zircon U–Pb geochronology, Hf isotopic compositions, and petrogenetic study of Abor volcanic rocks of Eastern Himalayan Syntaxis, Northeast India: Implications for eruption during breakup of Eastern Gondwana

et al. 2019

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This paper reports new zircon U–Pb ages and Hf isotopic compositions of felsic units of the Abor volcanic rocks (AVR) of Eastern Himalayan Syntaxis (EHS), Northeast India, and discusses their relationship to the Kerguelen plume activity. The AVR are bimodal and predominantly constituted by mafic rocks with minor felsic units. Mafic volcanics are identified as basalt and basaltic andesite with light rare earth elements (LREE) enriched and slightly depleted heavy rare earth elements (HREE) pattern without Eu anomalies. Low concentrations of LILE, high contents of Fe2O3, and other incompatible trace elements ratios reflect enriched nature of these mafic volcanics. Felsic volcanic rocks are dacitic to rhyolitic in composition, which have high REE content, high LREE/HREE, and pronounced negative Eu anomalies. Enriched LREE, high Th/Nb, Ce/Nb ratios, and variations in Rb/Zr, K/Rb, La/Sm ratios with negative anomalies of Ba, Nb, Sr, P, Ti in felsic rocks suggest substantial contribution of crustal contamination at the time of eruption. Zircons from felsic units yield an average U–Pb age of ~132 Ma and unradiogenic (ƐHf(t) < 0) Hf isotope values of −7.0 to −13.3 with model ages between 1.5 and 2.1 Ga, suggesting old crustal assimilation in their genesis. The AVR were emplaced in the continental rift tectonic setting, and depth of the magma source is confirmed as near spinel stability zone. The AVR are positively comparable with other flood basalts that were formed due to the Kerguelen plume activity. Therefore, our combined new geochemical and geochronological data show that the AVR were emplaced at early stage (~132 Ma) of eastern Gondwana breakup due to outbreak of the Kerguelen plume. This study thus supports the idea of the Kerguelen plume affecting a large area of Eastern India, Western Australia, and Antarctica during early stage of Gondwana breakup.

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Basalt basement from the Kerguelen Plateau and the trail of a Dupal plume

Cited by 92 publications

References 55 publications

Jurassic to Eocene Plate Tectonic Reconstructions in the Kerguelen Plateau Region

Jurassic to Eocene Plate Tectonic Reconstructions in the Kerguelen Plateau Region

Plume-lithosphere interaction : geochemical evidence from upper mantle and lower crusal Xenoliths from the Kerguelen Islands

Zircon U–Pb geochronology, Hf isotopic compositions, and petrogenetic study of Abor volcanic rocks of Eastern Himalayan Syntaxis, Northeast India: Implications for eruption during breakup of Eastern Gondwana

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