Gravity Anomalies and the Godavari Rift, India

Qureshy, M. N.; Brahmam, N. Krishna; Garde, Subhash C.; Mathur, B. K

doi:10.1130/0016-7606(1968)79[1221:gaatgr]2.0.co;2

Cited by 67 publications

(13 citation statements)

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“…These troughs are: (i) Kamthi, (ii) Umrer, (iii) Bhander, (iv) Wardha-Pranhita, and (v) Vaidarbha Nadi coal field all extending in a northwesterly direction below the Deccan Traps (Joga Rao et al 1984;Chary 1993). Towards the southeastern side these troughs are connected to the probable northward extension of Pranhita-Godavari Gondwana graben through Wardha and Nagpur which abuts the NSL underneath Satpura basin (Qureshy et al 1968;Biswas 2003). These sites of high heat flow values are associated with gravity and resistivity lows indicating the presence of Gondwana sediments with fluids in general and coal seams in particular (Joga Rao et al 1984;Chary 1993;Gupta 1993).…”

Section: Numerical Results and Discussionmentioning

confidence: 91%

2-D Crustal thermal structure along Thuadara-Sindad DSS profile across Narmada-Son lineament, central India

Thiagarajan

2007

J Earth Syst Sci

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Central India is traversed by a WSW-ENE trending Narmada-Son lineament (NSL) which is characterized by the presence of numerous hot springs, feeder dykes for Deccan Traps and seismicity all along its length. It is divided in two parts by the Barwani-Sukta Fault (BSF). To the west of this fault a graben exists, whereas to the east the basement is uplifted between Narmada North Fault (NNF) and Narmada South Fault (NSF). The present work deals with the 2-D thermal modeling to delineate the crustal thermal structure of the western part of NSL region along the Thuadara-Sindad Deep Seismic Sounding (DSS) profile which runs almost in the N-S direction across the NSL. Numerical results of the model reveal that the conductive surface heat flow value in the region under consideration varies between 45 and 47 mW/m 2 . Out of which 23 mW/m 2 is the contribution from the mantle heat flow and the remaining from within the crust. The Curie depth is found to vary between 46 and 47 km and is in close agreement with the earlier reported Curie depth estimated from the analysis of MAGSAT data. The Moho temperature varies between 470 and 500 • C. This study suggests that this western part of central Indian region is characterized by low mantle heat flow which in turn makes the lower crust brittle and amenable to the occurrence of deep focused earthquakes such as Satpura (1938) earthquake.

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Section: Numerical Results and Discussionmentioning

confidence: 91%

2-D Crustal thermal structure along Thuadara-Sindad DSS profile across Narmada-Son lineament, central India

Thiagarajan

2007

J Earth Syst Sci

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“…Morphologically similar flora presently exists in the subarctic region. Yellendu area of Godavari valley coalfield, however, demonstrates a part of the tectonically controlled and slowly sinking faulted block (Qureshy et al 1968;Bhaskar Rao et al 1970) where thick pile of the organic matter rich sediments have been accumulated, which in due course of time transformed into the present day coal deposits. Fox (1931) opined that the Gondwana coals have allochthonous origin, therefore contain higher frequency of mineral matter association.…”

Section: Depositional Environmentmentioning

confidence: 99%

Study of petrographic composition and depositional environment of the coals from Queen seam of Yellendu area, Godavari valley coalfield, Andhra Pradesh

Sarate¹

2010

J Geol Soc India

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The study of coal succession from bore hole No. Q-448 of Yellendu area of the Godavari valley coalfield, Andhra Pradesh reveals that the coals of Queen seam are high volatile bituminous C in rank and have vitrinite reflectance (R o max %) varying between of 0.52 and 0.62%. The petrographic constitution however, suggests that the depositional site appears to be a slowly sinking and tectonically controlled basin, having received continuous supply of vegetal matter rich resource at regular intervals. The formation of inertinite rich coal suggests, oxidising enviornment of deposition. The dominence of vitrinite and liptinite constituents in these coals postulates the existence of alternating cold and humid spells. The present study indicates that these coals originated under an alternate oxic and anoxic moor condition.

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“…Such a juxtaposition, during at least part of the Phanerozoic was proposed on Permian palaeogeographical grounds by Ahmad ( 196 1) and Veevers et al (1971), on geophysical grounds by Qureshy et al (1968) and on radiometric-age determinations by Crawford (1969). However, Crawford (1971) reformed his earlier ideas in the light of the recently available palaeomagnetic data, which suggest a juxtaposition of western India to East Africa, at least during the Palaeozoic and part of the Mesozoic.…”

Section: Ibab (Figs)mentioning

confidence: 99%

Palaeomagnetism of Upper Bhander Sandstones from Central India and implications for a tentative Cambrian Gondwanaland reconstruction

Klootwijk

1973

Tectonophysics

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A virtual geomagnetic pole position for the uppermost Vindhyan sediments in Central India, probably correlative with the Cambrian of the Salt Range (W. Pakistan), was obtained from 43 oriented cores (7 sites) drilled from the Upper Bhander sandstones in the Great Vindhyan basin.Alternating field and thermal dema~etization resulted in a mean direction: D = 207.5", I = +9.5" (k = 137.5, "9s = 5.5") and a virtual geomagnetic northpole position: 146S"W 48.5"N (dp = 3", dm = 5.5").This pole position disagrees with the Cambrian palaeomagnetic results from the Salt Range. Implications of this disagreement for the pre-drift configuration of Gondwanaland, based on pa1aeomagnet.c results, are discussed.

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Gravity Anomalies and the Godavari Rift, India

Cited by 67 publications

References 0 publications

2-D Crustal thermal structure along Thuadara-Sindad DSS profile across Narmada-Son lineament, central India

2-D Crustal thermal structure along Thuadara-Sindad DSS profile across Narmada-Son lineament, central India

Study of petrographic composition and depositional environment of the coals from Queen seam of Yellendu area, Godavari valley coalfield, Andhra Pradesh

Palaeomagnetism of Upper Bhander Sandstones from Central India and implications for a tentative Cambrian Gondwanaland reconstruction

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