Crust–mantle interaction in the genesis of siliceous high magnesian basalts: evidence from the Early Proterozoic Dongargarh Supergroup, India

Sensarma, Sarajit; Palme, H.; Mukhopadhyay, D.

doi:10.1016/s0009-2541(02)00020-7

Cited by 30 publications

(19 citation statements)

References 35 publications

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“…Naganjaneyulu and Santosh (2010) proposed that subductioncollision tectonics along the CITZ was a Mesoproterozoic event ($1.6 Ga) whereas the emplacement of Malanjkhand and Dongargarh granitoids were Palaeoproterozoic events (Panigrahi et al, 2004;Stein et al, 2004;Narayana et al, 2000). Two granitoid batholiths are N-S aligned along the Dongargarh-Kotri rift zone and coeval nature with the Nandgaon bimodal volcanism (Sensarma et al, 2002(Sensarma et al, , 2004. Along with this, MG and DG shows geochemical affinity of I-type and A-type granites, respectively.…”

Section: Trace Elementsmentioning

confidence: 87%

Comparative petrogenesis and tectonics of Paleoproterozoic Malanjkhand and Dongargarh granitoids, Central India

Pandit¹,

Panigrahi²

2012

Journal of Asian Earth Sciences

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Section: Trace Elementsmentioning

confidence: 87%

Comparative petrogenesis and tectonics of Paleoproterozoic Malanjkhand and Dongargarh granitoids, Central India

Pandit¹,

Panigrahi²

2012

Journal of Asian Earth Sciences

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“…(d) La/Sm vs. TiO 2 diagram for the TH‐1 and TH‐2 rocks from SGB. Field of Phanerozoic and Archean boninites are from the database: http://georoc.mpch‐mainz.gwdg.de/georoc/Entry.html; the field of SHMB is from Seitz and Keays (); Sensarma, Palme, and Mukhopadhyay (). The MORB field is from (Polat et al, ) [Colour figure can be viewed at wileyonlinelibrary.com]…”

Section: Discussionmentioning

confidence: 99%

Neoarchean suprasubduction zone magmatism in the Sonakhan greenstone belt, Bastar Craton, India: Implications for subduction initiation and melt extraction

et al. 2018

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The Neoarchean Sonakhan greenstone belt (SGB) in the north‐eastern Bastar Craton is mainly composed of an association of pillowed and massive tholeiitic basalts emplaced within an intraoceanic environment. Two types of ultrabasic rocks were identified and are designated as TH‐1 and TH‐2 on the basis of geochemical parameters. Both sample suites exhibit depletion of HFSE with reference to LILE and LREE, LREE/HFSE ratios, and negative Nb–Ta–Ti anomalies in the primitive mantle‐normalized multi‐element diagrams. The geochemical characters of TH‐1 and TH‐2 are consistent with Island arc tholeiites (IAT) and boninite‐like rocks of both Archean and Phanerozoic terranes. Mineral chemistry of clinopyroxenes from both volcanic suites indicate an oceanic arc affinity. The chromite chemistry indicate its derivation from a boninite‐like magma in a suprasubduction zone (SSZ) environment. Trace element modelling depicts that source depletion with significant influence of fluids derived from the subducting oceanic slab collectively controlled the trace element inventory of the mantle wedge, which result to the higher abundance of LREE and LILE compared to HREE and HFSE. The occurrence of lower basalt sequence followed by IAT and boninite‐like rocks in the SGB define a magmatic evolution which is comparable to the Phanerozoic ophiolite suites that exhibit subduction initiation prior to forearc rifting and suprasubduction zone magmatism. The subduction initiation in the intraoceanic lithosphere and the initial decompression melting followed by the upwelling of the MORB‐related magmas were attributed to the formation of the lower pillow basalts. Dehydration of the subducting plate and the melt extraction processes in the hydrous lherzolite mantle wedge account for the formation of TH‐1. Subsequent depletion and significant modification of a more refractory harzburgite source by the slab‐derived fluids generated the TH‐2 rocks. The compositionally diverse magmatic imprints with IAT and boninite affinity in the SGB indicate the significance of episodic melt extraction processes, dehydration of the subducting plate, and hydrous fluxing in SSZ tectonic setting.

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“…According to Sensarma et al . () SHMB probably indicates interaction of primary komatiitic rock with crustal melt at the Archaean–Proterozoic transition. Recently, Chalapathi Rao and Srivastava () have reported the occurrence of boninitic dykes from the Dongargarh Supergroup.…”

Section: Introductionmentioning

confidence: 99%

Geochemical characterization and petrogenesis of Proterozoic Khairagarh volcanics: implication for Precambrian crustal evolution

Longjam

Ahmad

2011

Geological Journal

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The Khairagarh volcano-sedimentary sequence is exposed along the Kotri-Dongargarh Belt towards the north-eastern part of the Bastar Craton. This sequence is exposed south of the Central Indian Shear (CIS) and east of the Sakoli Group rocks. The Khairagarh volcanic sequence is represented by low-Ti, intermediate-Ti and high-Ti basalt-basaltic andesite series that probably represent varying degrees of partial melting of an enriched mantle source, thus they appear to be consanguineous. These rocks are associated with a sequence of high magnesium andesitic (HMA) rocks that follow a separate evolutionary trend, thus they appear not to be related to the basalt-basaltic andesite sequence. The presence of the two contrasting sequences probably indicates generation in a hot Andean-type subduction zone for the HMA, and Andean-type back-arc rifting for the basalt-basaltic andesite samples. The possibility of a relatively thick crust around 3.6 Ga in the Bastar Craton and the Amgaon Gneissic Complex, basement for the Khairagarh-Sakoli sequence, probably indicates that it was part of the Supercontinent Ur. The mantle extraction age of about 2.9 to 2.5 Ga, based on the Nd-model ages for the KhairagarhSakoli sequence, probably indicate that this part of the Central Indian Shield became part of the Supercontinent Columbia subsequently.

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Crust–mantle interaction in the genesis of siliceous high magnesian basalts: evidence from the Early Proterozoic Dongargarh Supergroup, India

Cited by 30 publications

References 35 publications

Comparative petrogenesis and tectonics of Paleoproterozoic Malanjkhand and Dongargarh granitoids, Central India

Comparative petrogenesis and tectonics of Paleoproterozoic Malanjkhand and Dongargarh granitoids, Central India

Neoarchean suprasubduction zone magmatism in the Sonakhan greenstone belt, Bastar Craton, India: Implications for subduction initiation and melt extraction

Geochemical characterization and petrogenesis of Proterozoic Khairagarh volcanics: implication for Precambrian crustal evolution

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