Timing of Incision of the Salmon River, West-Central Idaho, Using (U-Th)/He Analysis of Apatites
Timing of Incision of the Salmon River, West-Central Idaho, Using (U-Th)/He Analysis of Apatites
批准号:
9909453
负责人:
Brian Wernicke
金额:
$7.36万
依托单位国家:
美国
项目类别:
Standard Grant
财政年份:
2000
资助国家:
美国
项目状态:
已结题
起止时间:
2000-01-01 至 2001-12-31
中文摘要
9909453 Wernick大多数主要的山脉带都有记录表明岩体相对于地表的向上运动,但由于补偿侵蚀,很难确定是否出现了显著的地形高程,以及在构造周期中何时发生。 该项目将利用一种相对较新的方法来估计爱达荷州的Salmon River-Clearwater山脉的地形隆起的年龄,该地区类似于科迪勒拉山脉更南部的Sierra内华达州,那里的古隆起已被证明始于白垩纪。 研究结果将有助于确定在科迪勒拉海拔发展的空间格局,并将提供进一步的测试或验证的方法。
英文摘要
9909453WernickeThe upward motion of rock masses relative to the earth's surface has been documented for most major mountain belts, but because of compensating erosion, it is difficult to determine if significant topographic elevation developed and when in the tectonic cycle it occurred. This project will utilize a relatively new method for estimating the age of topographic uplift in the Salmon River-Clearwater Mountains of Idaho, an area analogous to the Sierra Nevada further south in the cordillera, where paleoelevation has been shown to start during the Cretaceous. Results will help determine the spatial pattern of elevation development in the Cordillera and will provide a further test or validation of the method.
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