Abstract
The lava sequence of the central-western Deccan Traps (from Jalgaon towards Mumbai) is formed by basalts and basaltic andesites having a significant variation in TiO2 (from 1.2 to 3.3 wt%), Zr (from 84 to 253 ppm), Nb (from 5 to 16ppm) and Ba (from 63 to 407 ppm), at MgO ranging from 10 to 4.2 wt%. Most of these basalts follow a liquid line of descent dominated by low pressure fractionation of clinopyroxene, plagioclase and olivine, starting from the most mafic compositions, in a temperature range from 1220° to 1125°C. These rocks resemble those belonging to the lower-most formations of the Deccan Traps in the Western Ghats (Jawhar, Igatpuri and Thakurvadi) as well as those of the Poladpur formation. Samples analyzed for87Sr/86Sr give a range of initial ratios from 0.70558 to 0.70621. A group of flows of the Dhule area has low TiO2 (1.2–1.5 wt%) and Zr (84–105 ppm) at moderate MgO (5.2–6.2 wt%), matching the composition of low-Ti basalts of Gujarat, low-Ti dykes of the Tapti swarm and Toranmal basalts, just north of the study area. This allows chemical correlations between the lavas of central Deccan, the Tapti dykes and the north-western outcrops. The mildly enriched high field strength element contents of the samples with TiO2 > 1.5 wt% make them products of mantle sources broadly similar to those which generated the Ambenali basalts, but their high La/Nb and Ba/Nb, negative Nb anomalies in the mantle normalized diagrams, and relatively high87Sr/86Sr, make evident a crustal input with crustally derived materials at less differentiated stages than those represented in this sample set, or even within the sub-Indian lithospheric mantle.
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References
Beane J E and Hooper P R 1988 A note on the picrite basalts from the western Ghats, Deccan Traps, India;Mem. Geol. Soc. India 10 117–133
Bodas M S, Khadri SFR and Subbarao K V 1988 Stratigraphy of the Jawhar and Igatpuri Formations, Western Ghats lava pile, India;Mem. Geol. Soc. India 10 235–252
Boynton W B 1984 Cosmochemistry of Rare Earth Elements: Meteorite Studies. In: Henderson P (ed.): Rare Earth Element Geochemistry, Elsevier, Amsterdam, pp. 63–114
Chandrasekharam D, Mahoney J J, Sheth H C and Duncan R A 1999 Elemental and Nd-Sr-Pb isotope geochemistry of flows and dikes from the Tapi rift, Deccan flood basalt province, India;J. Volcanol. Geotherm. Res. 93 111–123
Comin-Chiaramonti P, Cundari A, Piccirillo E M, Gomes C B, Castorina F, Censi P, De Min A, Marzoli A, Speziale S and Velazquez V F 1997 Potassic and sodic igneous rocks from eastern Paraguay: their origin from the lithospheric mantle and genetic relationships with the associated Paranà flood tholeiites;J. Petrol. 38 495–528
Cox K G and Hawkesworth C J 1985 Geochemical stratigraphy of the Deccan Traps at Mahabaleshwar, Western Ghats, India, with implication for open system processes;J. Petrol. 26 355–387
Eggins S M 1992 Origin and differentiation of picritic arc magmas, Ambae (Aoba), Vanuatu;Contrib. Mineral. Petrol. 114 79–100
Grove T L, Gerlach D C and Sando T W 1982 Origin of calcalkaline series lavas at Medicine Lake Volcano by fractionation, assimilation and mixing;Contrib. Mineral. Petrol. 80 160–182
Hooper P R 1994 ources of continental flood basalts: the lithospheric component; In: Subbarao K V (ed.) Volcanism, Wiley Eastern Ltd. pp 29–53
Hooper P R 1999 The Deccan Traps: a personal perspective; In: Subbarao K V (ed.) Deccan Volcanic Province. W D West Volume;Mem. Geol. Soc. India 43 153–165
Khadri S F R, Subbarao K V, Hooper P R and Walsh J N 1988 Stratigraphy of Thakurvadi Formation, Western Deccan Basalt Province, India;Mem. Geol. Soc. India 10 280–304
Khadri S F R, Subbarao K V and Walsh J N 1999a Stratigraphy, form and structure of the east Pune basalts, western Deccan basalt province, India; In: Subbarao K V (ed.) Deccan Volcanic Province. W D West Volume;Mem. Geol. Soc. India 43 179–202
Khadri S F R, Walsh J N and Subbarao K V 1999b Chemical and magneto-stratigraphy of Malwa Traps around Magraba region, Dhar district (Madhya Pradesh); In: Subbarao K V (ed.) Deccan Volcanic Province. W D West Volume;Mem. Geol. Soc. India 43 203–218
Krishnamurthy P and Cox K G 1977 Picrite basalts and related lavas from the Deccan Traps of Western India;Contrib. Mineral. Petrol. 62 53–75
Krishnamurthy P and Cox K G 1980 A potassium-rich alkalic suite from the Deccan Traps, Rajpipla, India;Contrib. Mineral. Petrol. 73 179–189
Lightfoot P C and Hawkesworth C J 1988 Origin of Deccan Trap lavas: evidence from combined trace element and Sr-, Nd-and Pb-isotope data;Earth Planet. Sci. Lett. 91 89–104
Lightfoot P C, Hawkesworth C J, Devey C W, Rogers N W and Van Calsteren P W C 1990 Source and differentiation of Deccan Trap lavas: implications of geochemical and mineral chemical variations;J. Petrol. 31 1165–1200
Mahoney J J, Macdougall J D, Lugmair G W, Gopalan K and Krishnamurthy P 1985 Origin of contemporaneous tholeiitic and K-rich alkalic lavas: a case study from the northern Deccan Plateau, India;Earth Planet. Sci. Lett. 72 39–53
Mahoney J J 1988 Deccan Traps; In: Macdougall J D (ed.) “Flood Basalts” Kluwer, Dordrecht pp. 151–194
Mahoney J J, Sheth H C, Chandrasekharam D and Peng Z X 2000. Geochemistry of flood basalts of the Toranmal section, northern Deccan Traps, India: implications for regional Deccan stratigraphy;J. Petrol. 41 1099–1120
Mahoney J J, Duncan R A, Khan W, Gnos E and McCormick G R 2002 Cretaceous volcanic rocks of the South Tethyan suture zone, Pakistan: implications for the Réunion hotspot and Deccan Traps;Earth Planet. Sci. Lett. 203 295–310
Melluso L, Beccaluva L, Brotzu P, Gregnanin A, Gupta A K, Morbidelli L and Traversa G 1995 Constraints on the mantle sources of the Deccan Traps from the petrology and geochemistry of the basalts of Gujarat State (Western India);J. Petrol. 36 1393–1432
Melluso L, Sethna S F, Morra V, Khateeb A and Javeri P 1999 Petrology of the mafic dyke swarm of the Tapti river in the Nandurbar area (Deccan volcanic province); In: Subbarao K V (ed.) Deccan Volcanic Province. W D West Volume;Mem. Geol. Soc. India 43 735–756
Melluso L, Morra V, Brotzu P and Mahoney J J 2001 The Cretaceous igneous province of central-western Madagascar: evidence for heterogeneous mantle sources, crystal fractionation and crustal contamination;J. Petrol. 42 1249–1278
Mitchell C and Widdowson M 1991 A geological map of the southern Deccan Traps, India and its structural implications;J. Geol. Soc. London 148 495–505
Najafi S J, Cox K G and Sukheswala R N 1981 Geology and geochemistry of the basalt flows (Deccan Traps) of the Mahad-Mahableshwar section, India; In: Subbarao K V and Sukheswala R N (eds.) Deccan Volcanism;Mem. Geol. Soc. India 3 300–315
Pande K 2002 Age and duration of the Deccan Traps, India: a review of radiometric and paleomagnetic constraints;Proc. Indian Acad. Sci. 111 115–123
Peng Z X and Mahoney J J 1995 Drillhole lavas in the Deccan Traps and the evolution of the Reunion plume;Earth Planet. Sci. Lett. 134 169–185
Peng Z X, Mahoney J J, Hooper P R, Harris C and Beane J E 1994 A role for lower continental crust in flood basalt genesis? Isotopic and incompatible element study of the lower six formations of the Western Deccan Traps;Geochim. Cosmochim. Acta 58 267–288
Peng Z X, Mahoney J J, Hooper P R, Macdougall J D and Krishnamurthy P 1998 Basalts of the northeastern Deccan Traps, India: isotopic and elemental geochemistry and relation to southwestern Deccan stratigraphy;J. Geophys. Res. 103 29843–29865
Sano T, Fujii T, Deshmukh S S, Fukuoka T and Aramaki S 2001 Differentiation processes of Deccan Trap basalts: contribution from geochemistry and experimental petrology;J. Petrol. 42 2175–2195
Sen G 2001 Generation of Deccan Trap magmas;Proc. Indian Acad. Sci. 111 409–431
Sheth H C, Mahoney J J and Chandrasekharam D 2004 Geochemical stratigraphy of Deccan flood basalts of the Bijasan Ghat section, Satpura Range, India;J. Asian Earth Sci. 23 127–139
Subbarao K V, Chandrasekharam D, Navaneethakrishnan P and Hooper P R 1994 Stratigraphy and structure of parts of the central Deccan basalt province: eruptive models; In: Subbarao K V (ed.) Volcanism, Wiley Eastern Ltd. pp 321–332
Subbarao K V and Hooper P R 1988 Reconnaissance map of the Deccan Basalt Group in the Western Ghats, India;Mem. Geol. Soc. India 10 321–332
Sun S-s and McDonough W F 1989 Chemical and isotopic systematics of oceanic basalts: implications for mantle composition and processes; In: Saunders A D and Norry M J (eds) Magmatism in the Ocean Basins.Geol. Soc. Spec. Publ. 42 313–345
Talusani R V R 2001 A newly reported alkali basalt flow near Bhir, Deccan Volcanic Province, India;J. Asian Earth Sci. 19 501–506
Toplis M J and Carroll M R 1995 An experimental study of the influence of oxygen fugacity on Fe-Ti oxide stability, phase relations, and mineral-melt equilibria in ferrobasaltic systems;J. Petrol. 36 1137–1170
Widdowson M, Pringle M S and Fernandez O A 2000 A post K-T boundary (Early Paleocene) age for Deccantype feeder dykes, Goa, India;J. Petrol. 41 1177–1194
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Melluso, L., Barbieri, M. & Beccaluva, L. Chemical evolution, petrogenesis, and regional chemical correlations of the flood basalt sequence in the central Deccan Traps, India. J Earth Syst Sci 113, 587–603 (2004). https://doi.org/10.1007/BF02704024
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DOI: https://doi.org/10.1007/BF02704024