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2 9 2 6～ 2 5 0 5Ma ,V =0 183mm/a ;2 5 0 5～ 2 3 2 7Ma ,V =0 152mm/a ;2 3 2 7～ 2 0 59Ma ,V =0 0 19mm/a。
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.
出处
《地震地质》
EI
CSCD
北大核心
2000年第1期53-58,共6页
Seismology and Geology
