Abstract: Step thermal,and A.F.demagnetizations have been done for 518 samples (47 sites) from Sishichang section across the Aksu area,in the Tarim Basin.The mean paleomagnetic pole positions calculated upon the characteristic magnetization are φ=10.5°S,λ=151.2°E for the Late Devonian;φ=52.2°N,λ=179.5°E for the Late Carboniferous;φ= 56.5°N,λ=190.1°E for the Early Permian.The results show that the Tarim block was one of the parts of the Laurasia but not of the Gondwana during Late Paleozoic,and that from the Late Carboniferous to Early Permian the Tarim block had collided with the Kazakhstan block,Siberian block and Russian block,and no displacements large have occurred between these blocks since the Mesozoic.However,the pole position in the Permian for the Tarim block differs obviously from that for Sino-Korea block (φ= 44°N,λ= 358°E,after M.W.McElhinny et al.).The differential paleo-latitude was about 10?between the Tarim and Sino-Korea block in the Permian.Their orientations were also different from each other.The paleomagnetic result is contrary to the geologically conventional idea that the-two blocks in question appeared as a whole in the Late Paleozoic.

摘要： 用热退磁辅以交变退磁方法对采自塔里木盆地阿克苏地区四石厂剖面47个采样点518块标本进行了逐步磁清洗和测试。由本征剩磁方向统计得到塔里木地台晚古生代的古地磁极位置(晚泥盆世φ=10.5°S、λ=151.2°E;晚石炭世φ=52.2°N、λ=179.5°E;早二叠世φ=56.5°N,λ=190.1°E)。古地磁结果表明:塔里木地台在晚古生代是北方大陆的块体之一。从晚石炭世至早二叠世塔里木地台已和北方的哈萨克斯坦板块、西伯利亚地台、俄罗斯地台等连成一片,并且从中生代以来它们之间的相对位置没有发生过大规模的变动。