S.A. Merkouriev, N.A. Sotchevanova

SPbFIZMIRAN, Muchnov per, 2, Box 188, St. Petersburg, 191023, Russia

We present the results of magnetic and bathymetric data collected on board Russian vessels during the last decade. Our analysis shows that since late Cretaceous the proto-Carlsberg Ridge (CR) was spreading at a faster rate, prior to India’s collision with Eurasia. Since Eocene, the present CR is characterized by slow spreading. Our results depict two discordant systems of linear magnetic anomalies. One corresponds with fast spreading with respect to latitude axis of the proto-ridge and the other with slow spreading with respect to modern axis of the CR, suggesting that the two spreading systems are asymmetric both relative to each other and relative to axial anomaly. We infer that during both these periods the structure and spreading on the CR was non-stationary.