A high-resolution model for Eurasia-North America plate kinematics since 20 Ma
نویسندگان
چکیده
منابع مشابه
Slowing of India’s convergence with Eurasia since 20 Ma and its implications for Tibetan mantle dynamics
[1] Reconstructions of the relative positions of the India and Eurasia plates, using recently revised histories of movement between India and Somalia and between North America and Eurasia and of the opening of the East African Rift, show that India’s convergence rate with Eurasia slowed by more than 40% between 20 and 10 Ma. Much evidence suggests that beginning in that interval, the Tibetan Pl...
متن کاملSlow-downs and speed-ups of India–Eurasia convergence since 20 Ma: Data-noise, uncertainties and dynamic implications
India–Somalia and North America–Eurasia relative motions since Early Miocene ( 20 Ma) have been recently reconstructed at unprecedented temporal resolution (o1 Myr) from magnetic surveys of the Carlsberg and northern Mid-Atlantic Ridges. These new datasets revamped interest in the convergence of India relative to Eurasia, which is obtained from the India–Somalia–Nubia–North America–Eurasia kine...
متن کاملA new high-resolution model for India–Capricorn motion since 20 Ma: Implications for the chrono- logy and magnitude of distributed crustal deformation in the Central Indian Basin
We use more than 5000 crossings of magnetic anomalies and fracture zones along the Carlsberg and Central Indian ridges to examine whether the onset of widespread reverse faulting at ~ 8 Ma in the Central Indian Basin was accompanied by a significant change in India–Capricorn motion, whether the onset of this faulting represented the initiation of motion between these two plates, and whether the...
متن کاملThe role of the Zagros orogeny in slowing down Arabia-Eurasia convergence since ~5 Ma
[1] Large topographic belts along convergent margins have been recognized with the ability to slowdown the kinematics of subduction over geologically short time periods (i.e., few Myr), because their associated gravitational spreading provides significant resistive force within the framework of plate tectonics. The record of past and present-day plate kinematics provides important constraints o...
متن کاملFirst seamount age evidence for significantly slower African plate motion since 19 to 30 Ma
Resolving the time–space (and compositional) evolution of volcanism along long-lived South Atlantic hotspot trails is important to understanding the connection between hotspot volcanism and mantle plumes. Ar=Ar ages are reported here for rocks dredged from a line of five individual seamounts along an 3⁄4290 km northeast to southwest line extending from the vicinity of Saint Helena Island, and a...
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ژورنال
عنوان ژورنال: Geophysical Journal International
سال: 2008
ISSN: 0956-540X,1365-246X
DOI: 10.1111/j.1365-246x.2008.03761.x