摘要
取自天山南侧库车盆地北缘欧西达坂花岗岩体的锆石、磷灰石裂变径迹年龄给出了初步结果：中新生代天山板内造山带在早白垩世（１３４Ｍａ～１０９Ｍａ）发生了明显快速隆升，平均隆升速率为０．１３ｍｍ／ａ（１３０ｍ／Ｍａ）；而从晚白垩世到现在，天山板内造山带的平均隆升速率为０．０３ｍｍ／ａ（３１．９ｍ／Ｍａ）。在晚新生代天山板内造山带再次发生了快速隆升。现有的同位素研究成果表明中新生代天山造山带至少发生了两次幕式快速隆升。
Fission track ages from the OXi-Daban granite pluton, located between the south foothill of t he Tian Shan and the northern margin of the Kuche Basin, show that the rapid uplift of the Tian Shan occurred with the average rate of 0.13mm/3(13 0m/Ma)during the early Cretaceous period(from 13 4Ma～107Ma)and the slow uplift with the average rate of 0.03mm/a (31.9m/Ma) from the late Cretaceous to Present.It is postulated that the strong reactivation of the Tian Shan intrapIate orogenic belt exist- ed during the early Cretaceous period, Since th e late Cenozoic the rapid uplift of the Tian Shan has occurred again。 The results of the present studies show that two uplift epi sod s have existed in t he Tia n Shan intraplate orogenic belt during Mesozoic and Cenozoic time。
出处
《北京大学学报（自然科学版）》
CSCD
北大核心
1995年第4期473-478,共6页
Acta Scientiarum Naturalium Universitatis Pekinensis
关键词
造山带
锆石
磷灰石
裂变径迹
隆升速率
新生代
Tian Shan intraplate orogenic belt
Zircon and Apatite fission track
uplift rate
