Geochemistry and petrogenesis of sodic and potassic mafic alkaline rocks in the Deccan Volcanic Province, Mumbai Area (India)

Melluso, Leone; Sethna, S. F.; D’Antonio, Massimo; Javeri, Priya; Bennio, L.

doi:10.1007/s007100200009

Cited by 42 publications

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“…The Ba/Nb ratios of the CUL vary from 11.5 to 16.9 and are similar to those from Chhaktalao lamprophyres (Ba/Nb = 15-17; Hari, 1998) but are considerably higher than those (Ba/Nb = 6.2-7.5) in Murud Janjira lamprophyres (see Melluso et al, 2002). However, REE as well as multi element distribution patterns of CUL are similar to that of Murud Janjira lamprophyres and even Chhaktalao lamprophyres implying a broad similarity in their genesis ( Fig.…”

Section: Whole-rock Geochemistrymentioning

confidence: 71%

“…Table 2). It is quite distinct in its chemistry from the diopside reported from Murud Janjira lamprophyres (Wo 47-50 En 33-39 Fs 10-19 ; Melluso et al, 2002;Dessai and Viegas, 2010), Phenai mata and Panwad-Kawant lamprophyres (Wo 52-56 En 25-44 Fs 4-11 ; Rock et al, 1994) and Chhaktalao lamprophyres (Wo 48-48 En 35-37 Fs 13-14 ; Hari, 1998) from the Deccan LIP. CUL clinopyroxene shows very good positive correlation between Al and Ti implying a fractionation trend (Electronic supplementary Fig.…”

Section: Petrography and Mineral Chemistrymentioning

confidence: 92%

“…5). The CUL have relatively higher contents of SiO 2 , Al 2 O 3 and lesser or similar contents of MgO, Fe 2 O Ã 3 and CaO in comparison to the more primitive alkaline lamprophyres (Murud Janjira and Chhaktalao), ultramafic lamprophyres (south of the tethyan suture) from the Deccan LIP and lamprophyres with calc-alkaline affinities from Villany Mountains, Hungary (Nédli and TÓth, 2007) and Taihang Mountains, North China craton (Chen and Zhai, 2003) Transition metal content (Ni = <20 to 70 ppm; Cr = 41-140 ppm and Co = 17-29 ppm) of the CUL is significantly lower (Table 8) than those in Deccan-related alkaline lamprophyres from Murud Janjira (Ni = 117-284 ppm; Cr = 111-991 ppm and Co = 57-75 ppm; Melluso et al, 2002;Dessai and Viegas, 2010), Chhaktalao (Ni = 139-167 ppm; Cr = 169-240 and Co = 44-55 ppm; Hari, 1998) and ultramafic lamprophyres from south tethyan region (Ni = 384-548 ppm; Cr = 614-1230 ppm and Co = 54-69 ppm; Kerr et al, 2010) and further supports their relatively more differentiated nature. All the CUL samples share identical chondrite normalised Rare Earth element (REE) and primitive mantle normalised multi element distribution patters ( Fig.…”

Section: Whole-rock Geochemistrymentioning

confidence: 93%

“…Their K 2 O content range from 8.15 to 9.95 (wt%) close to the pristine composition. In comparison, the micas from Murud Janjira lamprophyres are clearly phlogopites and also are more primitive [Mg/(Mg + Fe) up to 0.88] in nature (Melluso et al, 2002) (Electronic supplementary Fig. 3).…”

Section: Petrography and Mineral Chemistrymentioning

confidence: 97%

“…Alkaline magmatism represented by K-rich basalts, nepheline syenites, ijolites, carbonatites, kimberlites and lamprophyres is an important, albeit volumetrically minor, component of the Deccan Large Igneous Province and occur along the various rift zones such as E-W trending Narmada rift, Cambay rift and western coastal rifted margin (e.g., Subba Rao, 1972;Bose, 1980;Mahoney et al, 1985;Gwalani et al, 1993;Simonetti et al, 1998;Ray and Pande, 1999;Melluso et al, 2002;Dessai and Viegas, 2010;Kerr et al, 2010;Chalapathi Rao et al, 2011a;Chalapathi Rao and Lehmann, 2011).…”

Section: Deccan Large Igneous Province the Associated Alkaline Magmamentioning

confidence: 99%

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Petrogenesis of lamprophyres from Chhota Udepur area, Narmada rift zone, and its relation to Deccan magmatism

Rao

Das

2012

Journal of Asian Earth Sciences

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Section: Whole-rock Geochemistrymentioning

confidence: 71%

Section: Petrography and Mineral Chemistrymentioning

confidence: 92%

Section: Whole-rock Geochemistrymentioning

confidence: 93%

Section: Petrography and Mineral Chemistrymentioning

confidence: 97%

Section: Deccan Large Igneous Province the Associated Alkaline Magmamentioning

confidence: 99%

See 3 more Smart Citations

Petrogenesis of lamprophyres from Chhota Udepur area, Narmada rift zone, and its relation to Deccan magmatism

Rao

Das

2012

Journal of Asian Earth Sciences

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Tholeiitic basalts of Deccan large igneous province, India: An overview

2019

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The Deccan large igneous province (DLIP) of Peninsular India is predominantly composed of tholeiitic basalts with a minor amount of alkaline, carbonatite, and silicic rocks. The tholeiitic basalts of DLIP are enriched in incompatible trace elements and divisible into low‐Ti basalts (TiO2 < 2.5; Ti/Y < 500) and high‐Ti basalts (TiO2 > 2.5; Ti/Y > 500). Despite variable total REE content, both low‐Ti and high‐Ti basalts exhibit almost similar geochemical patterns in the chondrite‐ and primitive‐ mantle‐normalized diagrams. The mantle potential temperature (Tp) of high‐Ti tholeiites estimated at Ca.1368°C, which is consistent with an ambient mantle temperature (1300–1400°C) whereas the Tp of low‐Ti tholeiites is around 1553°C, which indicates its derivation from the mantle plume axis. Extensive assimilation of the crustal components into the ascending plume have masked the nature and compositional characteristics of both high‐ and low‐Ti basalts. The low‐Ti basalts indicate significant contamination with crustal components than the high‐Ti basalts. The geochemical and isotopic compositions indicate the involvement of multiple mantle components. In general, the differentiated tholeiites of DLIP are the products of plume and depleted sections of the mantle with or without contributions from the continental crust. The main phase of Deccan magmatism intensely affected the atmosphere and hydrosphere, which was a possible trigger for the mass extinction event at the K–Pg boundary.

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Hydrochemistry of the Narmada and Tapti Rivers, India

Sharma

Subramanian

2008

Hydrological Processes

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The chemistry of major ions and elements in Narmada and Tapti river water was studied based on the monitoring of the drainage basins for monsoon and post-monsoon seasons in 2004. The results show the influence of rock weathering on the concentration of major ions in the surface water. There is a significant contribution from the catchment geologies in the major constituents of water. The total dissolved solids (TDS) concentrations are reflecting the signature of weathering of rocks in the catchment areas. In the Narmada River, HCO 3 , Ca 2C and Mg 2C are dominant ions, whereas in the Tapti River the ions dominating major compositions are HCO 3 , Na C and Mg 2C . The high concentration of Cl and SO 2 4 is a signature of anthropogenic inputs in addition to the contribution of discharge from springs and/or groundwater. The high concentration of NO 3 can exclusively be attributed to the anthropogenic activities. The average concentration of dissolved silica being higher than the Indian and world average is reflecting the contribution of silicate weathering. The present study gives the silicate and carbonate weathering rates and the corresponding CO 2 consumption rates considering the contribution of carbonate rocks present in the selected river basins of the Deccan basaltic province. The mean silicate weathering rates during the investigation period for the Narmada and Tapti Rivers show lower values, but the corresponding mean CO 2 consumption rates give higher values compared with earlier estimated rates by Dessert et al. (2001. Earth and Planetary Science Letters 188: 459). For the study period, the mean carbonate weathering rates and the associated CO 2 consumption rates for the Narmada and Tapti Rivers are ¾12Ð67 t km 2 year 1 and ¾7Ð32 t km 2 year 1 and ¾0Ð36 ð 10 6 mol km 2 year 1 and ¾0Ð22 ð 10 6 mol km 2 year 1 respectively.

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Geochemistry and petrogenesis of sodic and potassic mafic alkaline rocks in the Deccan Volcanic Province, Mumbai Area (India)

Cited by 42 publications

References 0 publications

Petrogenesis of lamprophyres from Chhota Udepur area, Narmada rift zone, and its relation to Deccan magmatism

Petrogenesis of lamprophyres from Chhota Udepur area, Narmada rift zone, and its relation to Deccan magmatism

Tholeiitic basalts of Deccan large igneous province, India: An overview

Hydrochemistry of the Narmada and Tapti Rivers, India

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