Palaeomagnetic record from RH lacustrine core in Zoig■ Basin of Tibetan Plateau

<正> RH core,located in the Zoigê Basin of Eastern Tibetan Plateau,is a quite good lacustrinecore.It is 120.40m long.Nine geomagnetic excursions or events were recorded in the core during Brunhesnormal epoch based on measurement results of the remnant magnetization of small interval core samples(10cminterval)under series AF demagnetization,and organic carbon-14 and AMS dates.The excursions recorded bythe core can be correlated with those found in other regions in the world.They are the most detailed recordin lacustrine deposit in China.B/M boundary in the core is at the depth of 108.0m.It can be calculatedfrom the depositional rate of 0.13mm/a that the bottom age of the core is 825 ka B.P.The excursion ages inBrunhes and their correlation with those found in other regions are discussed.