Aeromagnetic study of peninsular India

Harikumar, P.; Rajaram, Mita; Balakrishnan, T. S.

doi:10.1007/bf02702209

Cited by 14 publications

(11 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It is interesting to note that from aeromagnetic studies also, similar inferences were drawn by other workers; reported kimberlites (Nayak et al 1999) in the region are found to be associated with the intersections of the NW-SE and NE-SW trending structural features in the region (Anand and Rajaram, 2002;Harikumar et al 2000;Sharma et al 1999).…”

Section: Maddur-narayanpet Areasupporting

confidence: 62%

A subsurface criterion for predictive exploration of kimberlites from Bouguer gravity in the eastern Dharwar craton, India

2009

View full text Add to dashboard Cite

The Archaean-Proterozoic Dharwar craton has many recorded occurrences of diamondiferous kimberlites. Reports of kimberlite emplacement in parts of the tectonically complex eastern Dharwar craton and a significant density contrast between kimberlites and the host peninsular gneisses motivated us to conduct gravity studies in the NarayanpetIrladinne area of the eastern Dharwar craton. This region is contiguous with the Maddur-Narayanpet kimberlite that lies to its north, while the river Krishna lies to its south.From observed association of reported kimberlites in the Maddur-Narayanpet field with subsurface topography of the assumed three-layer earth section obtained by Bouguer gravity modelling, we developed a subsurface criterion for occurrence of kimberlites in the present study area. Using this criterion, five potential zones for kimberlite localization were identified in the Narayanpet-Irladinne region, eastern Dharwar craton.

show abstract

Section: Maddur-narayanpet Areasupporting

confidence: 62%

A subsurface criterion for predictive exploration of kimberlites from Bouguer gravity in the eastern Dharwar craton, India

2009

View full text Add to dashboard Cite

show abstract

“…Harikumar et al (2000), drawing their inferences from aeromagnetic studies, commented upon the limited strike extent of the Chitradurga thrust, indicating its local nature. Similarly, Gokarn et al (2001) reported upwarping of a shallow conductor (at a depth of about 20 km) below Chitradurga.…”

Section: Dharwar Craton: a Discussionmentioning

confidence: 99%

Crustal configuration of the Dharwar craton, India, based on joint modeling of regional gravity and magnetic data

Ramadass

Rao

Himabindu

2006

Journal of Asian Earth Sciences

View full text Add to dashboard Cite

“…The analytic signal method has been used extensively in magnetic interpretation (e.g., Nabighan, 1972;Roest et al, 1992;Mohan and Babu, 1995;Hsu et al, 1998;Harikumar et al, 2000;Bastani and Pedersen, 2001;Salem et al, 2002;Rajaram, 2003, 2004;Keating and Sailhac, 2004). This signal exhibits maxima over magnetization contrasts, independent of the ambient magnetic field and source magnetization directions.…”

Section: Analysis and Interpretationmentioning

confidence: 99%

“…Moreover, the analytic signal can be used to outline magnetic contrasts and their approximate depths, and it is possible to determine the signature of the causative body of the magnetic anomaly from the exact shape of the analytic signal (Roest et al, 1992). At low latitudes, an extensive source body will have a stronger analytical signal at their north and south edges (Harikumar et al, 2000;Rajaram, 2003, 2004). In order to understand the distribution of magnetic sources in the study region, the analytical signal of the aeromagnetic anomalies were computed based on the above procedure (Fig.…”

Section: Analysis and Interpretationmentioning

confidence: 99%

An aspect of the subsurface structure of the Burdur-Isparta area, SW Anatolia, based on gravity and aeromagnetic data, and some tectonic implications

Dolmaz

2007

Earth Planet Sp

View full text Add to dashboard Cite

Gravity and aeromagnetic analyses were conducted in the Burdur-Isparta area of Turkey in order to identify the subsurface structure and tectonics of the region independent of surface cover. The analytic signal of the aeromagnetic anomalies was first calculated to delineate the source fields of these anomalies. The magnetic signatures were found to correlate well with the intrusives associated with the subduction of the African oceanic lithosphere and with the ophiolitic nappes in the region. The residual aeromagnetic anomalies mostly orientate in the N-S direction, implying the presence of remanent magnetization. Based on the shape analysis of aeromagnetic anomalies, the region appears to have rotated clockwise. The magnetic anomalies were found to continue upward to 5 km a.s.l. The upward continued map shows deep effects of the sub-crustal magnetic sources. Based on the Bouguer gravity anomalies, the thickness of the crust in the study area is between 33 and 37.5 km. Major extensive NE-and NW-as well as N-trending faults are identified that coincide with the Lake Burdur, Lake Beysehir and Kovada grabens, respectively. Lake Egirdir is also devoid of any magnetic sources. As a final step, the maxima of the horizontal gradient of the gravity data were calculated. The maxima show that the major geological formations and the structural trends in the area are remarkable. The boundaries of the various geological formations can be identified based on the boundary analysis of the gravity and the analytic signal of the aeromagnetic data. The change in the nature of the anomalies reflects the imprints of intense deformation associated with major tectonic activity of the African-Eurasian plate convergence zone.

show abstract

Aeromagnetic study of peninsular India

Cited by 14 publications

References 7 publications

A subsurface criterion for predictive exploration of kimberlites from Bouguer gravity in the eastern Dharwar craton, India

A subsurface criterion for predictive exploration of kimberlites from Bouguer gravity in the eastern Dharwar craton, India

Crustal configuration of the Dharwar craton, India, based on joint modeling of regional gravity and magnetic data

An aspect of the subsurface structure of the Burdur-Isparta area, SW Anatolia, based on gravity and aeromagnetic data, and some tectonic implications

Contact Info

Product

Resources

About