摘要
对佳木斯地体盖层鸡西群和桦山群１９８个标本的古地磁研究，确定了该地体晚侏罗世和白垩纪的古磁极位置（６３．４Ｎ，７１．ＯＥ，Ａ９５＝６．１和７２．２Ｎ，７３．７Ｅ，Ａ９５＝３．６）和古地理纬度（５２．５Ｎ和５２．６Ｎ）。白垩纪以后，佳木斯地体相对于松辽地体又有大幅度的位移。
samples have been selected from the cover sequences of Jiamusi terrane,after successive thermal demagnetization treatment and field tests,The paper suggests that the paleomagnetic pole positions of Upper Jurossic and Cretoceous are (63. 4N, 71. 0E,A95=6.1) and(72. 2N, 73. 7E,A95=3.6), and the paleolatitude are 52. 5N and 52. 6N, The result indicate that the Jiamusi terrane have taken a large scale movement after Cretaceous Period.
关键词
佳木斯地体
晚侏罗世
白垩纪
古地磁
地体运动
Jiamusi terrane,upper Jurassic-Cretaceous,paleomagnetism,terrane movement
