Paleomagnetic and Geochronological Studies of the Mafic Dyke Swarms Of
Precambrian Research 198–199 (2012) 51–76 Contents lists available at SciVerse ScienceDirect Precambrian Research journa l homepage: www.elsevier.com/locate/precamres Paleomagnetic and geochronological studies of the mafic dyke swarms of Bundelkhand craton, central India: Implications for the tectonic evolution and paleogeographic reconstructions a,∗ a b a c Vimal R. Pradhan , Joseph G. Meert , Manoj K. Pandit , George Kamenov , Md. Erfan Ali Mondal a Department of Geological Sciences, University of Florida, 241 Williamson Hall, Gainesville, FL 32611, USA b Department of Geology, University of Rajasthan, Jaipur 302004, Rajasthan, India c Department of Geology, Aligarh Muslim University, Aligarh 202002, India a r t i c l e i n f o a b s t r a c t Article history: The paleogeographic position of India within the Paleoproterozoic Columbia and Mesoproterozoic Received 12 July 2011 Rodinia supercontinents is shrouded in uncertainty due to the paucity of high quality paleomagnetic Received in revised form 6 November 2011 data with strong age control. New paleomagnetic and geochronological data from the Precambrian mafic Accepted 18 November 2011 dykes intruding granitoids and supracrustals of the Archean Bundelkhand craton (BC) in northern Penin- Available online 28 November 2011 sular India is significant in constraining the position of India at 2.0 and 1.1 Ga. The dykes are ubiquitous within the craton and have variable orientations (NW–SE, NE–SW, ENE–WSW and E–W). Three dis- Keywords: tinct episodes of dyke intrusion are inferred from the paleomagnetic analysis of these dykes. The older Bundelkhand craton, Mafic dykes, Central ◦ NW–SE trending dykes yield a mean paleomagnetic direction with a declination = 155.3 and an incli- India, Paleomagnetism, Geochronology, ◦ ◦ − Ä ˛ Paleogeography nation = 7.8 ( = 21; 95 = 9.6 ).
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