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Lamprophyres from the Indian shield: A review of their occurrence, petrology, tectonomagmatic significance and relationship with the Kimberlites and related rocks

Rao, N.V. Chalapathi, Giri, Rohit K., Sharma, Abhinay, Pandey, Ashutosh·2020·Episodes
DOI 10.18814/epiiugs/2020/020014
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Figure 1 A generalized geological map of the peninsular India (Naqvi, 2005) showing locations of the lamprophyres reported from the Indian Shield.
Figure 1 A generalized geological map of the peninsular India (Naqvi, 2005) showing locations of the lamprophyres reported from the Indian Shield.CC-BY-NC · From the PDF
(XPL); (M) Zoned phlogopite phenocryst from the Sidhi lamprophyres of CITZ showing reverse pleochroism (PPL). (N) Zoned euhedral phenocryst of clinopyroxene from the Udiripikonda shoshonitic lamprophyre, Eastern Dharwar Craton (in XPL); (O) Clusters of amphibole phenocrysts from Mudigubba lamprophyre showing panidiomorphic- porphyritic- glomerophyric texture (in PPL). Abbreviations: Am= amphibole; Cpx= clinopyroxene; Ol= olivine; Bt= biotite; Ph= phlogopite; LL= lamprophyre; Sy= syenite; PPL = plane polarised light; XPL= crossed polarised light.
(XPL); (M) Zoned phlogopite phenocryst from the Sidhi lamprophyres of CITZ showing reverse pleochroism (PPL). (N) Zoned euhedral phenocryst of clinopyroxene from the Udiripikonda shoshonitic lamprophyre, Eastern Dharwar Craton (in XPL); (O) Clusters of amphibole phenocrysts from Mudigubba lamprophyre showing panidiomorphic- porphyritic- glomerophyric texture (in PPL). Abbreviations: Am= amphibole; Cpx= clinopyroxene; Ol= olivine; Bt= biotite; Ph= phlogopite; LL= lamprophyre; Sy= syenite; PPL = plane polarised light; XPL= crossed polarised light.CC-BY-NC · From the PDF
Image 3
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Image 4
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Figure 5 TiO 2 (wt %) vs SiO 2 (wt %) plot comparing amphibole chemistry of the Indian lamprophyres with the worldwide calcalkaline and ultramafic lamprophyres (after Rock, 1991). Data sources are same as in Fig. 3.
Figure 5 TiO 2 (wt %) vs SiO 2 (wt %) plot comparing amphibole chemistry of the Indian lamprophyres with the worldwide calcalkaline and ultramafic lamprophyres (after Rock, 1991). Data sources are same as in Fig. 3.CC-BY-NC · From the PDF
Figure 6 (A) Na 2 O (wt%) vs. K 2 O (wt%) and (B) SiO 2 (wt%) vs. K 2 O (wt%) (after Rock, 1987) plots classifying the lamprophyres from the Indian shield. Data sources: Prakasam Alkaline Province (Subrahmanyam et al., 1987; Madhavan et al., 1992, 1998; Ratnakar et al., 1996; Vijaya Kumar and Rathna, 2008), Mahakoshal (Srivastava and Chalapathi Rao, 2007; Srivastava, 2013), Eastern Dharwar Craton (Meshram et al., 2015; Lanjewar and Randive, 2017; Pandey et al., 2017a, b, 2018b), Deccan LIP (Dessai and Vegas, 2010; Chalapathi Rao et al., 2012; Pandey et al., 2017c), and Gondwana coalfield (Srivastava et al., 2009; Chalapathi Rao et al., 2014).
Figure 6 (A) Na 2 O (wt%) vs. K 2 O (wt%) and (B) SiO 2 (wt%) vs. K 2 O (wt%) (after Rock, 1987) plots classifying the lamprophyres from the Indian shield. Data sources: Prakasam Alkaline Province (Subrahmanyam et al., 1987; Madhavan et al., 1992, 1998; Ratnakar et al., 1996; Vijaya Kumar and Rathna, 2008), Mahakoshal (Srivastava and Chalapathi Rao, 2007; Srivastava, 2013), Eastern Dharwar Craton (Meshram et al., 2015; Lanjewar and Randive, 2017; Pandey et al., 2017a, b, 2018b), Deccan LIP (Dessai and Vegas, 2010; Chalapathi Rao et al., 2012; Pandey et al., 2017c), and Gondwana coalfield (Srivastava et al., 2009; Chalapathi Rao et al., 2014).CC-BY-NC · From the PDF
Figure 7 Nb/U vs. Ce/Pb variation plot with mantle array defined by MORBs and OIBs from Hofmann et al. (1986) and average OIB data from Sun and McDonough (1989). Data sources are same as in Fig. 6.
Figure 7 Nb/U vs. Ce/Pb variation plot with mantle array defined by MORBs and OIBs from Hofmann et al. (1986) and average OIB data from Sun and McDonough (1989). Data sources are same as in Fig. 6.CC-BY-NC · From the PDF
Figure 8 Nb/Yb vs. Th/Yb trace element ratio diagram (after Pearce, 2008) showing mantle array defined by MORBs and OIBs. Lamprophyres from the Mahakoshal belt show affinity to the OIBs and within-plate enriched mantle source is represented by the lamprophyres from the Prakasam Alkaline Province, the Deccan LIP and the Gondwana coalfield. Data sources are same as in Fig.6.
Figure 8 Nb/Yb vs. Th/Yb trace element ratio diagram (after Pearce, 2008) showing mantle array defined by MORBs and OIBs. Lamprophyres from the Mahakoshal belt show affinity to the OIBs and within-plate enriched mantle source is represented by the lamprophyres from the Prakasam Alkaline Province, the Deccan LIP and the Gondwana coalfield. Data sources are same as in Fig.6.CC-BY-NC · From the PDF
Figure 9 87 Sr/ 86 Sr initial vs. ε Nd initial variation in the lamprophyres from the Eastern Dharwar Craton (solid circles) and Gondwana coalfield (cross) showing their derivation from an old subcontinental lithospheric mantle and an enriched mantle related to mantle plume, respectively.
Figure 9 87 Sr/ 86 Sr initial vs. ε Nd initial variation in the lamprophyres from the Eastern Dharwar Craton (solid circles) and Gondwana coalfield (cross) showing their derivation from an old subcontinental lithospheric mantle and an enriched mantle related to mantle plume, respectively.CC-BY-NC · From the PDF
From left to right: N.V. Chalapathi Rao, Rohit Kumar Giri, Abhinay Sharma, and Ashutosh Pandey.
From left to right: N.V. Chalapathi Rao, Rohit Kumar Giri, Abhinay Sharma, and Ashutosh Pandey.CC-BY-NC · From the PDF

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Cited by

Metadata

Authors
Rao, N. V. C., Giri, R. K., Sharma, A., & Pandey, A.
Affiliations
EPMA and SEM laboratories, Department of Geology, Institute of Science, Banaras Hindu University, Varanasi-221005, India
Venue
Episodes
Publisher
International Union of Geological Sciences
Published
2020-03-01
Volume
43
Issue
1
Pages
231-248
ISSN
  • 0705-3797
  • 2586-1298
DOI
10.18814/epiiugs/2020/020014
Cited by
33
References
0
Language
en

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