Computer Science
Scientific paper
Sep 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989e%26psl..94..344m&link_type=abstract
Earth and Planetary Science Letters, Volume 94, Issue 3-4, p. 344-352.
Computer Science
4
Scientific paper
The Godavari basin is divided into three parts namely Godavari-Pranhita, Chintalapudi, and coastal sub-basins. The Godavari-Pranhita sub-basin, located northwest of the Mailaram basement ``high'', depicts the characteristics of a half graben. The maximum thickness of the Gondwana sediments in this part is approximately 7.5 km. The gravity ``highs'' along the shoulders and inside the basin around Chinnur are interpreted as subsurface mass excesses along the Moho and within the crust. The Chinnur ``high'' in the centre of the basin probably represents a remanence of the arial doming characterizing the rift valleys. The Chintalapudi basin is bounded by the Mailaram ``high'' and the coastal fault towards the south. This part of the basin has faulted margins on both the sides as indicated by sharp gradients in the Bouguer anomaly with 3.0 km of sediments in the central part and associated mass excesses along the Moho and the shoulders suggesting it to be a full graben. The development of this full graben in this region alone is probably constrained by the deep faults on all four sides. The boundary faults defining these sub-basins, the shoulder ``highs'' and the transverse Mailaram ``high'' are still associated with occasional seismic activity suggesting some neo-tectonic adjustments along them. The coastal basin, though striking NE-SW, depicts the Gondwana structural trends (NW-SE) in the total magnetic intensity map of the region in alignment with the boundary faults of the Chintalapudi sub-basin to the north. The prominent structures in this coastal part are a depression of approximately 4.5 km and a coastal ridge at a depth of 2-2.5 km as interpreted from the magnetic data for a susceptibility of 0.009 CGS units. The northwest part of the magnetic map of the coastal basin depicts more short-wavelength shallow anomalies which provide compatible tectonics for a remanent direction of magnetization with azimuth equal to 140° and inclination +60°. This direction of magnetization is similar to that of the Lower Deccan Trap (65 m.y.) which suggests the presence of basic intrusions of this period in this region with basement tectonics having Gondwana trends and superimposed almost perpendicular structural features. The latter might be a part of more regional tectonics affecting the entire east coast of India from the Mahanadi basin in the north to east of the Cuddapah and Cauvery basins in the south.
Gupta Bhaskar Sen
Mishra D. C.
Venkatarayudu M.
No associations
LandOfFree
Godavari rift and its extension towards the east coast of India does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Godavari rift and its extension towards the east coast of India, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Godavari rift and its extension towards the east coast of India will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-764643