HR: 0800h
AN: GP41A-0825    [Abstracts]
TI: Cenozoic Polarity Time Scale (CPTS) as the Tool of Dating and Correlation of the Cenozoic Strata in North-Eastern Russia
AU: * Minyuk, P
EM: minyuk@neisri.magadan.ru
AF: North-East Interdiscipluinary Scientific Research Institute og Russia Academy Science, Portovaya st., 16, Magadan, 68500 Russian Federation
AB: About 70 sections of continental and marine sediments covering he age through Paleocene to Pleistocene have been studied in North-Eastern Russia. Zones of polarity were used to determine the age and regional correlation of the strata with different biostratigraphic characteristic. On the basis of relation of magnetic zones to the CPTS, the dating of the major paleoclimatic and stratigraphic boundaries of the region fixed in the local stratons, has been obtained. There are the following events: chrones 25-24r - warming of the climate (boundary layers between Paleocene and Eocene ); chrones 13r - the beginning of the Eocene-Oligocene climatic pessimum; the boundary of the chrones 6Cn-6Cr - the climatic pessimum at the boundary of the Paleogene and Neogene; chrones 5Br - the middle of the chrone 5Adn - the first climatic optimum of the Miocene (the boundary of the Lower and Middle Miocene); chrones 5r - the lower part of the chrone 5n - the second climatic optimum of the Miocene ( the boundary interval between Middle and Lower Miocene). According to the paleomagnetic data, the supposed boundaries of the Miocene and Pliocene, Pliocene and Pleistocene are considered to be problematic and are fixed in the unique
DE: 1520 Magnetostratigraphy
SC: Geomagnetism and Paleomagnetism [GP]
MN: 2004 AGU Fall Meeting