Tehostekuvassa fysiikan laitosta etuoven suunnalta

1c. Paleomagnetism of Dharwar dykes, India

Participating scientists

  • E. Piispa (post doc, Michigan Tech, USA)
  • L.J. Pesonen, prof. (emeritus)
  • A.K. Murthy
  • S. Chandrappa (post doc, Kuvempu University, India)
  • A. Smirnov (Michigan Tech, USA)
  • J. Plado (University of Tartu, Estonia)

Project goals

To define the APWP of Dharwar craton during the Precambrian and to study its position in various supercontinents.

Highlights

A new APWP of Dharwar craton during Paleo-Mesoprotorozoic has been completed. A novel technique to combine Google Earth satellite images and ground magnetic surveys enables us to solve the dyke crossing puzzles of the Dharwar dykes.

Fig.1: The sampling sites in Dharwar craton (India) are shown with numbers in the geological map. '
The colored circles correspond to E-W, N-S, NE-SW, and NW-SE trending dykes.

Fig.1: The sampling sites in Dharwar craton (India) are shown with numbers in the geological map. The colored circles correspond to E-W, N-S, NE-SW, and NW-SE trending dykes. Inset: the rectangle shows the study area in the Indian Peninsula and the letters denote the approximate centers of the Dharwar (DC), Bastar (BA), and Bundelkhand (BU) cratons.

Fig. 2: Google Earth image of two cross-cutting dykes at Jajur-Tippanapalle area, Dharwar craton. Fig. 3: Ground magnetic survey data of same dykes as in left.
Fig. 2: Google Earth image of two cross-cutting dykes at Jajur-Tippanapalle area, Dharwar craton. Fig. 3: Ground magnetic survey data of same dykes as in left.

Recent publications

  • Piispa, E.J., Smirnov, A.V., Pesonen, L.J., Lingadevaru, M., Anantha Murthy, K.S., Devaraju, T.C., 2010. An integrated dyke research of Paleoproterozoic Dyke Swarms in the Dharwar Craton, India. In: R. Srivastava (Ed.), Dyke Swarms - Keys for Geodynamic Interpretations, Part I, Chapter 3, pp 33-46.