Boninites from the Neoarchaean Gadwal Greenstone belt, Eastern Dharwar Craton, India: implications for Archaean subduction processes

Manikyamba, C.; Naqvi, S. M.; Rao, D. V. Subba; Mohan, M. Ram; Khanna, Tarun C.; Rao, T. Gnaneshwar; Reddy, G. L. N.

doi:10.1016/j.epsl.2004.06.023

Cited by 128 publications

(66 citation statements)

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“…The Mauranipur supracrustal rocks consist of low K tholeiitic basalt, basaltic komatiite, volcaniclastic sediment, and BIF, and are similar to those reported from various Archean greenstone belts worldwide (e.g., Paris, 1987;Kusky and Polat, 1999;Kusky et al, 2001;Smithies, 2002;Polat et al, 2003;Feri and Jensen, 2003;Smithies et al, 2004Smithies et al, , 2005Manikyamba et al, 2005).…”

Section: Tectonic Setting Inferred For Basaltic Komatiitesupporting

confidence: 49%

Petrology and geochemistry of metamorphosed basaltic pillow lava and basaltic komatiite in the Mauranipur area: subduction related volcanism in the Archean Bundelkhand craton, Central India

Malviya

Arima

Pati

et al. 2006

Journal of Mineralogical and Petrological Sciences

101

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The occurrence of metamorphosed basaltic pillow lava in close association with serpentinized ultramafic rock, metamorphosed basaltic komatiite, volcaniclastic metasediment, and banded iron formation (BIF) in the Mauranipur area is the first explicit evidence for subduction related submarine volcanism in the Archean Bundelkhand craton, Central India. The Mauranipur pillow lava underwent greenschist to amphibolite facies metamorphism while retaining a geochemical signature of its igneous protolith. The pillow lava and associated massive volcanic rock is subalkalic, low − K tholeiitic basalt to basaltic andesite with SiO 2 = 51.9 − 55.9 wt% and Mg/(Mg + Fe .44, and depicts a nearly flat chondrite normalized HREE pattern with a low MREE/HREE ratio (Gd/Yb) N = 1.24 − 1.58. The basaltic komatiite displays remarkably similar geochemical characteristics to modern boninite. The present study, combined with available geological data, suggests that the supracrustal rocks of the Mauranipur area represent an Archean ophiolite sequence formed in a plate convergent setting.

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Section: Tectonic Setting Inferred For Basaltic Komatiitesupporting

confidence: 49%

Petrology and geochemistry of metamorphosed basaltic pillow lava and basaltic komatiite in the Mauranipur area: subduction related volcanism in the Archean Bundelkhand craton, Central India

Malviya

Arima

Pati

et al. 2006

Journal of Mineralogical and Petrological Sciences

101

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“…Besides the boninitic rocks reported here from the~3.3 Ga Holenarsipur greenstone belt, boninite-like rocks have also been recognized in the greenstone terranes of Eo-, Meso-and Neoarchean age [5][6][7][8]16]. The origin of boninites, in general, is attributed to a two stage melting process involving depletion of a mantle source due to prior melt extraction events, presumably at a mid-oceanic ridge, in the first stage, followed by partial melting of this depleted source triggered by the fluids/melts derived from the dehydration of subducted altered oceanic crust in the sub-arc mantle, in the second stage.…”

Section: Petrogenetic Implicationsmentioning

confidence: 90%

Section: Introductionmentioning

confidence: 99%

“…Their reported occurrence in the Archean greenstone successions is not very extensive. Nevertheless, there are some classical examples of boninitic magmatism that has been identified in the~3.7 Ga Eoarchean [5],~3.1 Ga Mesoarchean [6], and the~2.7 Ga Neoarchean [7,8] greenstone terranes.In this contribution, we present detailed field, petrography, and geochemistry of the newly identified high-Si high-Mg volcanic rocks from one of the oldest supracrustal sequences of late Paleoarchean age in the Dharwar craton, India. The rocks exhibit typical boninite geochemical fingerprints and they occur within the southern part of the~3.3 Ga Holenarsipur greenstone belt [9] in the western sector of the Dharwar craton (Figure 1).…”

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confidence: 99%

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Boninites in the ~3.3 Ga Holenarsipur Greenstone Belt, Western Dharwar Craton, India

et al. 2018

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Abstract:In this contribution, we present detailed field, petrography, mineral chemistry, and geochemistry of newly identified high-Si high-Mg metavolcanic rocks from the southern part of the~3.3 Ga Holenarsipur greenstone belt in the western Dharwar craton, India. The rocks occur as conformable bands that were interleaved with the mafic-ultramafic units. The entire volcanic package exhibits uniform foliation pattern, and metamorphosed under greenschist to low grade amphibolite facies conditions. The rocks are extremely fine grained and exhibit relict primary igneous textures. They are composed of orthopyroxene and clinopyroxene phenocrysts with serpentine, talc, and amphibole (altered clinopyroxene). Cr-spinel, rutile, ilmenite, and apatite occur as disseminated minute grains in the groundmass. The mineralogical composition and the geochemical signatures comprising of high SiO 2 (~53 wt. %), Mg# (~83), low TiO 2 (~0.18 wt. %), and higher than chondritic Al 2 O 3 /TiO 2 ratio (~26), reversely fractionated heavy rare earth elements (REE) (Gd N /Yb N~0 .8), resulting in concave-up patterns, and positive Zr anomaly, typically resembled with the Phanerozoic boninites. Depletion in the high field strength elements Nb, and Ti relative to Th and the REE in a primitive mantle normalized trace element variation diagram, cannot account for contamination by pre-existing Mesoarchean continental crust present in the study area. The trace element attributes instead suggest an intraoceanic subduction-related tectonic setting for the genesis of these rocks. Accordingly, the Holenarsipur high-Si high-Mg metavolcanic rocks have been identified as boninites. It importantly indicates that the geodynamic process involved in the generation of Archean boninites, was perhaps not significantly different from the widely recognized two-stage melt generation process that produced the Phanerozoic boninites, and hence provides compelling evidence for the onset of Phanerozoic type plate tectonic processes by at least~3.3 Ga, in the Earth's evolutionary history.Keywords: boninite; komatiite; Mesoarchean; Holenarsipur; Dharwar craton; India IntroductionBoninites, and boninite-series volcanic rocks have been widely recognized in the Phanerozoic intraoceanic arc systems [1,2], and the Ophiolites, [3,4]. They are produced by the partial melting of a prior depleted refractory mantle wedge, metasomatized by subducted slab-derived fluids during the initial stages of the melt generation process. Their reported occurrence in the Archean greenstone successions is not very extensive. Nevertheless, there are some classical examples of boninitic magmatism that has been identified in the~3.7 Ga Eoarchean [5],~3.1 Ga Mesoarchean [6], and the~2.7 Ga Neoarchean [7,8] greenstone terranes.In this contribution, we present detailed field, petrography, and geochemistry of the newly identified high-Si high-Mg volcanic rocks from one of the oldest supracrustal sequences of late Paleoarchean age in the Dharwar craton, India. The rocks exhibit typical boninite geochem...

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“…The uniformitarians proposed that the EDC formed as a result of accretion of a series of island arcs (e.g., Balakrishnan et al, 1999;Manikyamba et al, 2005;Naqvi et al, 2006) to the WDC through transpression. Chadwick et al (2000) suggests that the accretion of already formed island arcs and granitic plutons constituted a single landmass (i.e., Dharwar batholith) to the WDC, causing sin- Chardon et al, 2008) showing the locations and ages of Mesoarchean and Neoarchean granitoids referred to in the text.…”

Section: Geological Settingmentioning

confidence: 99%

SHRIMP U–Pb zircon ages of granitoids adjacent to Chitradurga shear zone, Dharwar craton, South India and its tectonic implications

Nasheeth

Okudaira

Horie

et al. 2015

Journal of Mineralogical and Petrological Sciences

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We report newly obtained U-Pb SHRIMP ages of zircons from the granitoids in the vicinity of Chitradurga shear zone of Dharwar craton, South India. The analyses yielded two different ages, an older age of ca. 3300 Ma and younger ages of~2600-2650 Ma, those suggest two major igneous activities in the study area. The former activity contemporaneous with the formation of Mesoarchean (~3.3 Ga) basement rocks (i.e., Peninsular Gneiss) and the latter reflects the Neoarchean (~2.6 Ga) regional plutonic activity in the Western Dharwar craton. Field and petrographic observations suggest that the intensity of deformation is high at the boundary between amphibolites and granitoids. Our new age dates imply that the formation of Chitradurga shear zone postdated the magmatic activity in the study area and the deformation structures possibly related to the development of Chitradurga shear zone. The area on either sides of the boundary between Eastern and Western Dharwar cratons experienced a Neoproterozoic event between 700-600 Ma indicated by prominent SHRIMP lower intercepts.

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Boninites from the Neoarchaean Gadwal Greenstone belt, Eastern Dharwar Craton, India: implications for Archaean subduction processes

Cited by 128 publications

References 35 publications

Petrology and geochemistry of metamorphosed basaltic pillow lava and basaltic komatiite in the Mauranipur area: subduction related volcanism in the Archean Bundelkhand craton, Central India

Petrology and geochemistry of metamorphosed basaltic pillow lava and basaltic komatiite in the Mauranipur area: subduction related volcanism in the Archean Bundelkhand craton, Central India

Boninites in the ~3.3 Ga Holenarsipur Greenstone Belt, Western Dharwar Craton, India

SHRIMP U–Pb zircon ages of granitoids adjacent to Chitradurga shear zone, Dharwar craton, South India and its tectonic implications

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