摘要：
Based on our measurements of fission track ages of apatites (113-43 Ma) and zircons (169-103 Ma) , U-Pb ages of zircons (215-206 Ma) and K-Ar ages of biobites (186-178 Ma) of granite samples, we performed apatite fission track thermal history modeling and track age spectra calculation (TASC) to obtain up-to-date histories of uplifting and cooling of the Qiangtang Central Uplift Belt (QCUB) since the Late Triassic.The QCUB experienced four major uplifting-cooling episodes, namely the Early Jurassic, Late Jurassic-Early Cretaceous, Late Cretaceous-early Miocene and later Miocene.The four episodes correspond to the dynamics of the post-collision stretching of the South and North Qiangtang blocks, Lhasa-South Qiangtang collision, Neo-Tethys ocean subduction, and Indo-Asian collision and N-S strike-slip movement, respectively, and experienced upliftings of 11.4, 2.85, 4.3-5 and 0.85 km, respectively.The QCUB probably was at sea level in the Early Cretaceous, and rapidly uplifted to 2-2.5 km in the Late Cretaceous;during 90-20 Ma, the long term thrusting systems caused further uplifting to～5 km, followed by differential surface uplifting due to the denudation effect of the Great Lakes and the south-north strike-slip action in the Miocene.%本文综合磷灰石裂变径迹年龄 (113～43 Ma) 、锆石裂变径迹年龄 (169～103 Ma) 、锆石U-Pb年龄 (215～206 Ma) 、黑云母K-Ar年龄 (186～178 Ma) , 通过磷灰石热史模拟, TASC图谱分析和矿物封闭温度-年龄等手段, 获得了中央隆起晚三叠世至今较为完整的冷却抬升历史.中央隆起主要经历了早侏罗世、晚侏罗世—早白垩世、晚白垩世—中新世早期和中新世晚期至今四期冷却事件, 与南北羌塘板块后碰撞伸展、拉萨-羌塘板块碰撞、新特提斯洋板片俯冲、印度-欧亚板块碰撞以及中新世南北向走滑-伸展存在动力学联系, 造成11.4km、2.85km、4.3～5km和0.85km的抬升量.中央隆起在侏罗纪相对两侧盆地抬升, 随着两侧盆地经历了侏罗纪的沉积增厚, 与两侧盆地高差减小, 在早白垩世早期可能位于海平面附近, 随后快速抬升至2～2.5km, 统一接受晚白垩世红层沉积, 并经历长期持续的逆冲推覆构造活动, 进一步抬升至5km, 随后受到中新世古大湖夷平和南北向伸展作用影响, 中央隆起相对盆地发生差异抬升.
