Zircon U–Pb and galena Pb isotope evidence for an approximate 1.0 Ga terrane constituting the western margin of the Aravalli–Delhi orogenic belt, northwestern India

Deb, M.

doi:10.1016/s0301-9268(01)00134-6

Cited by 160 publications

(88 citation statements)

References 17 publications

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“…These mafic-ultramafic rocks have been identified as remnants of 'ophiolite', named as Phulad Ophiolite Suite (POS -Gupta et al 1980). The Sm-Nd isochron age of 1024 ± 78 Ma (Volpe and Macdougall 1990) for the Ranakpur diorites from the POS is in general agreement with coeval arc magmatism in this terrain (987±6 Ma, Deb et al 2001;968.3±1 Ma, Pandit et al 2003). The WMF, also called Phulad Shear Zone in this southern sector of Delhi Fold Belt, is characterized by distinctly vertical stretching lineations (Ghosh et al 1999) and the kinematics is identified as a transpressional setting (Sengupta and Ghosh 2004).…”

Section: Introductionsupporting

confidence: 73%

Mafic rocks from Erinpura gneiss terrane in the Sirohi region: Possible ocean-floor remnants in the foreland of the Delhi Fold Belt, NW India

et al. 2011

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A small isolated mafic body occurs to the south of Sirohi near village Daba within the Neoproterozoic Erinpura Granite in the southern sector of the Proterozoic Delhi Fold Belt in NW India. This mafic body occurs close to a 100 m wide NE-SW trending shear zone (Daba Shear Zone) which overprints the felsic rock fabrics. Further south, a small mafic body near village Kui was also sampled which forms the southern limit of the Phulad Ophiolite Suite which is a 300 km long major NE-SW trending lineament, described as Western Margin Fault. Some of the lithological components of the Daba mafic body show locally preserved magmatic fabric but completely transformed mineralogies under lower amphibolites facies metamorphic conditions where two-stage deformation has been inferred. Magnetic fabric analysis underlines a general correspondence of structural elements in both felsic and mafic lithologies. Binary correlations of Zr with other high field strength elements underline fractionation as the main process in the evolution of Daba and Kui rocks. Geochemical characteristics indicate subalkaline tholeiitic basalt affinity for these mafic rocks. The trace element characteristics, such as enriched LIL elements, high Th, absence of negative Nb anomalies and depletion in compatible elements in Daba samples suggest an enriched mantle source and lower degree of melting. The trace and rare earth element characteristics for Kui (Th anomaly, Nb-Ta trough and less spiked patterns, flat REE trends) indicate derivation from a refractory mantle source affected by fluids derived from subduction. Distinct differences in trace and REE characteristics between Daba and Kui can be interpreted in terms of different stages of ophiolite development.

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Section: Introductionsupporting

confidence: 73%

Mafic rocks from Erinpura gneiss terrane in the Sirohi region: Possible ocean-floor remnants in the foreland of the Delhi Fold Belt, NW India

et al. 2011

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“…Limited geochronological data in the Aravalli Mobile Belt indicate granitoid magmatism and felsic volcanism between 2026 and 1723 Ma (Naha and Halyburton, 1974a,b;Choudhary et al, 1984;Naha and Mohanty, 1988;Roy, 1988;Sharma, 1988;Sarkar et al, 1989;Wiedenbeck and Goswami, 1994;Fareeduddin and Kröner, 1998;Kaur et al, 2009;Singh et al, 2010). Palaeoproterozoic mineralisation is indicated by model Pb ages of 1.8 and 1.7 Ga for the Rajpura-Dariba deposits in the Bhilwara Belt and the conformable sediment-hosted sulphide ores at Sawar in the Aravalli Belt respectively (Deb et al, 1989(Deb et al, , 2001). In addition to those possible primary source rocks, two sedimentary successions are recognised which contain carbonate (including stromatolites) and pelite, and have been metamorphosed at ca.…”

Section: Potential Source Terranesmentioning

confidence: 99%

Provenance and tectonic significance of the Palaeoproterozoic metasedimentary successions of central and northern Madagascar

Waele

Thomas

Macey

et al. 2011

Precambrian Research

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“…Bimodal magmatic rocks of middle Neoproterozoic ages occur in Madagascar of Africa [27 30] and India [31,32] . Granitoid having SHRIMP U-Pb age of 823 5Ma is also identified in the Lesser Himalayan granite belt in NW India [33] .…”

mentioning

confidence: 99%

Position of South China in configuration of Neoproterozoic supercontinent

Zheng

2004

Chin. Sci. Bull.

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Zircon U–Pb and galena Pb isotope evidence for an approximate 1.0 Ga terrane constituting the western margin of the Aravalli–Delhi orogenic belt, northwestern India

Cited by 160 publications

References 17 publications

Mafic rocks from Erinpura gneiss terrane in the Sirohi region: Possible ocean-floor remnants in the foreland of the Delhi Fold Belt, NW India

Mafic rocks from Erinpura gneiss terrane in the Sirohi region: Possible ocean-floor remnants in the foreland of the Delhi Fold Belt, NW India

Provenance and tectonic significance of the Palaeoproterozoic metasedimentary successions of central and northern Madagascar

Position of South China in configuration of Neoproterozoic supercontinent

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