| 新疆阿尔泰造山带构造作用的锆石裂变径迹分析 |
| 点此下载全文 |
| 引用本文：袁万明,董金泉,保增宽,安银昌.2005.新疆阿尔泰造山带构造作用的锆石裂变径迹分析[J].地球学报,26(z1):239-243. |
| DOI：10.3975/cagsb.2005.s1.80 |
| 摘要点击次数: 2860 |
| 全文下载次数: 2405 |
|
|
| 中文摘要:在新疆阿尔泰造山带所获得的19个锆石裂变径迹年龄变化于155-243Ma之间，明显地分为2组，分别对应于2个构造活动期，早期为155-189Ma，晚期为189-243Ma。这与磷灰石裂变径迹年龄反映的62-100Ma和100-160Ma两个构造期完全一致。早期和晚期构造活动期持续的时间分别为54-60Ma和34-38Ma，而这两个构造期之间的间隔时间，则从早到晚由83-89Ma变为89-93Ma。同时，锆石裂变径迹年龄与距特斯巴汗断裂和巴寨断裂的距离有关，反映这两条断裂带对区域构造演化的控制作用。 |
| 中文关键词:锆石裂迹径迹年龄 定年 构造期 冷却 阿尔泰 |
| |
| Zircon Fission Track Analyses of Tectonics in the Altay Mountains |
|
|
| Abstract:Totally 19 Zircon fission track ages were obtained. These ages range from 155 Ma to 243 Ma and can obviously divided into two tectonic episodes,i.e., 155-189Ma and 189-243 Ma, which are consistent with two tectonic episodes from apatite fission track ages (62-100 Ma and 100-160Ma). It is shown that the durations of the early and the late tectonic episodes are 54-60 Ma and 34-38Ma respectively, with the intervals between the early and the late tectonic episodes changing from 83-89Ma at the early stage to 89-93 Ma at the late stage. The average cooling speeds are circa 1.744℃/Ma during 243 Ma and 62 Ma and circa 1.371℃/Ma from about 62 Ma to the present day. In addition, the zircon fission track ages are related to the distances from the Tesbahan fault and the Basei fault, indicating that these faults must have controlled the regional tectonic evolution. |
| keywords:zircon fission track age dating tectonic episode cooling Altay Mountains |
| 查看全文 查看/发表评论 下载PDF阅读器 |
