Drainage evolution of the lower Narmada valley, western India

Sant, Dhananjay A.; Karanth, R. V.

doi:10.1016/0169-555x(93)90039-5

Cited by 23 publications

(13 citation statements)

References 5 publications

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“…1). The Narmada-Satpura-Tapi swarm is a linear, ENE-WSWtrending, giant dyke swarm (Sant and Karanth 1990;Ernst et al 1995), apparently continuing westward into the Saurashtra peninsula. The NNW-SSE-trending Konkan or west coast dyke swarm (e.g., Dessai and Viegas 1995) is exposed on the Konkan plain, between the Arabian Sea and the Western Ghats escarpment to the east.…”

Section: Introductionmentioning

confidence: 99%

Structure and emplacement of the Nandurbar–Dhule mafic dyke swarm, Deccan Traps, and the tectonomagmatic evolution of flood basalts

2006

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Flood basalts, such as the Deccan Traps of India, represent huge, typically fissure-fed volcanic provinces. We discuss the structural attributes and emplacement mechanics of a large, linear, tholeiitic dyke swarm exposed in the Nandurbar-Dhule area of the Deccan province. The swarm contains 210 dykes of dolerite and basalt >1 km in length, exposed over an area of 14,500 km 2 . The dykes intrude an exclusively basaltic lava pile, largely composed of highly weathered and zeolitized compound pahoehoe flows. The dykes range in length from <1 km to 79 km, and in thickness from 3 to 62 m. Almost all dykes are vertical, with the others nearly so. They show a strong preferred orientation, with a mean strike of N88°. Because they are not emplaced along faults or fractures, they indicate the regional minimum horizontal compressive stress (σ 3 ) to have been aligned ∼N-S during swarm emplacement. The dykes have a negative power law length distribution but an irregular thickness distribution; the latter is uncommon among the other dyke swarms described worldwide. Dyke length is not correlated with dyke width. Using the aspect ratios (length/thickness) of several dykes, we calculate magmatic overpressures required for dyke emplacement, and depths to source magma chambers that are consistent with results of previous petrological and gravity modelling. The anomalously high source depths calculated for a few dykes may be an artifact of underestimated aspect ratios due to incomplete along-strike exposure. However, thermal erosion is a mechanism that can also explain this. Whereas several of the Nandurbar-Dhule dykes may be vertically injected dykes from shallow magma chambers, others, particularly the long ones, must have been formed by lateral injection from such chambers. The larger dykes could well have fed substantial (≥1,000 km 3 ) and quickly emplaced (a few years) flood basalt lava flows. This work highlights some interesting and significant similarities, and contrasts, between the Nandurbar-Dhule dyke swarm and regional tholeiitic dyke swarms in Iceland, Sudan, and elsewhere.

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Section: Introductionmentioning

confidence: 99%

Structure and emplacement of the Nandurbar–Dhule mafic dyke swarm, Deccan Traps, and the tectonomagmatic evolution of flood basalts

2006

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“…In Dhule area, basalts show a thick sequence of about 870 m in Toranmal. It is dominated by columnar jointing simple flows, which are similar to that of Western Ghat (Sheth and Pande 2004;Ray et al 2007;Sant and Karanth 1990). Tertiary and quaternary alluvium is exposed along the major rivers.…”

Section: Lineaments and Dyke Intrusive From The Study Areamentioning

confidence: 82%

“…The petrographic and geochemical studies of dykes in Nandurbar Dhule area have been carried out by earlier researchers (Sheth 2005;Bhattacharji et al 2004;Das Balaram Maity and Tarafdar 2007). Since the dykes are not emplaced along faults or fracture, it suggests regional horizontal compressive stress along north-south as a region for the emplacement of dyke (Sant and Karanth 1990).…”

Section: Lineaments and Dyke Intrusive From The Study Areamentioning

confidence: 99%

Comparative study of Wenner and Schlumberger electrical resistivity method for groundwater investigation: a case study from Dhule district (M.S.), India

et al. 2017

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The area chosen for the present study is Dhule district, which belongs to the drought prone area of Maharashtra State, India. Dhule district suffers from water problem, and therefore, there is no extra water available to supply for the agricultural and industrial growth. To understand the lithological characters in terms of its hydrogeological conditions, it is necessary to understand the geology of the area. It is now established fact that the geophysical method gives a better information of subsurface geology. Geophysical electrical surveys with four electrodes configuration, i.e., Wenner and Schlumberger method, were carried out at the same selected sites to observe the similarity and compared both the applications in terms of its use and handling in the field. A total 54 VES soundings were carried out spread over the Dhule district and representing different lithological units. The VES curves are drawn using inverse slope method for Wenner configuration, IPI2 win Software, and curve matching techniques were used for Schlumberger configuration. Regionwise lithologs are prepared based on the obtained resistivity and thickness for Wenner method. Regionwise curves were prepared based on resistivity layers for Schlumberger method. Comparing the two methods, it is observed that Wenner and Schlumberger methods have merits or demerits. Considering merits and demerits from the field point of view, it is suggested that Wenner inverse slope method is more handy for calculation and interpretation, but requires lateral length which is a constrain. Similarly, Schlumberger method is easy in application but unwieldy for their interpretation. The work amply proves the applicability of geophysical techniques in the water resource evaluation procedure. This technique is found to be suitable for the areas with similar geological setup elsewhere.

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“…2). The Talvade dyke forms a part of the large Narmada-Satpura-Tapi giant dyke swarm of tholeiitic basalts outcropping in the Nandurbar-Dhule region of the central Deccan Traps (Sant and Karanth 1990;Ray et al 2007). The swarm covers an area of ∼14,500 km 2 and contains about 210 dykes of dolerite and basalt intrusive into compound pahoehoe flows of basaltic composition (Ray et al 2007(Ray et al , 2008.…”

Section: Regional Geology and Field Settingmentioning

confidence: 99%

The Basement of the Deccan Traps and Its Madagascar Connection: Constraints from Xenoliths

Upadhyay

Kooijman

Singh

et al. 2015

The Journal of Geology

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Drainage evolution of the lower Narmada valley, western India

Cited by 23 publications

References 5 publications

Structure and emplacement of the Nandurbar–Dhule mafic dyke swarm, Deccan Traps, and the tectonomagmatic evolution of flood basalts

Structure and emplacement of the Nandurbar–Dhule mafic dyke swarm, Deccan Traps, and the tectonomagmatic evolution of flood basalts

Comparative study of Wenner and Schlumberger electrical resistivity method for groundwater investigation: a case study from Dhule district (M.S.), India

The Basement of the Deccan Traps and Its Madagascar Connection: Constraints from Xenoliths

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