SEISMOLOGY AND GEOLOGY ›› 2000, Vol. 22 ›› Issue (1): 53-58.

• Brief Report • Previous Articles     Next Articles

THE FISSION TRACK EVIDENCE OF HUASHAN BATHOLITH UPLIFTING IN MESOZOIC-CENOZOIC

Wan Jinglin, Li Qi, Wang Yu   

  1. Institute of Geology, China Seismological Bureau, Beijing 100029
  • Received:1999-03-31 Revised:1999-08-31 Online:2000-03-08 Published:2009-11-25

华山岩体中、新生代抬升的裂变径迹证据

万景林, 李齐, 王瑜   

  1. 中国地震局地质研究所, 北京 100029

Abstract: Apatite minerals separated from samples that were collected from elevations of 520m to 1 950m on the Huashan batholith, yielded fission track ages of (20.59?3.6)Ma to (29.26?3.3)Ma. The data suggest an uplift rate of 0 019 to 0 189mm/a. One zircon mean fission track age of (43.45?2.7) Ma also suggests that the Huashan batholith started to uplift in early E 2. We infer that there is a sub normal fault developed in north part of the Huashan batholith.

Key words: Huashan batholith, Fission track, Uplift rate

摘要: 对采自华山岩体不同高度的磷灰石样品进行裂变径迹分析,所得结果结合相关地质资料认为:(1)华山岩体抬升至少始于渐新世或始新世;(2)华山主峰及北峰间可能发育一条对应于华山山前断裂的次级正断层,断距约340m;(3)据华山北峰样品研究,其各时段的平均抬升速率依次为29.26~25.05Ma,V=0.183mm/a;25.05~23.27Ma,V=0.152mm/a;23.27~20.59Ma,V=0.019mm/a。

关键词: 华山岩体, 裂变径迹, 抬升速率