青川鹰咀山花岗岩体侵位与山脉隆升  

Emplacement of the Yingzuishan Granite Rock Mass and Uplift of the Siguniang Peak

作　　者：白富正[1] 

机构地区：[1]四川省地质矿产勘查开发局川西北地质队,四川绵阳621000

出　　处：《四川地质学报》2015年第1期3-6,11,共5页Acta Geologica Sichuan

摘　　要：运用磷灰石裂变径迹法对鹰咀山花岗岩进行了分析,所取样品的裂变径迹年龄位于50.6-69.6Ma之间,小于其地层时代或侵入年龄,表明摩天岭推覆构造带的隆升开始于晚白垩世,用磷灰石裂变径迹年龄来计算可知：研究区内花岗岩50.6Ma以来的冷却速率和剥蚀速率分别为2.08℃/Ma和0.063mm/a,50.6-69.6Ma之间的相对抬升与剥蚀速率为0.013mm/a,因此说明摩天岭推覆构造带从晚白垩世以来一直处于持续隆升冷却的过程。Fission-track age for apatite from the Yingzuishan granite varies from 50.6 Ma to 69.6 Ma, indicating uplift of the Siguniang Peak in the Late Cretaceous. The calculation based on the fission-track age for the apatite shows that the cooling rate and denudation rate of the granite are 2.08 ℃ /Ma and 0.063 mm/a, respectively with the rate of the relative uplift and denudation of 0.013mm/a during 50.6-69.6Ma.

关 键 词：构造隆升 裂变径迹定年 推覆构造带 摩天岭 

分 类 号：P511.4[天文地球—地质学]