Thermoluminescence of feldspar as a multi-thermochronometer to constrain the temporal variation of rock exhumation in the recent past
Thermoluminescence of feldspar as a multi-thermochronometer to constrain the temporal variation of rock exhumation in the recent past
复制标题
长石的热释光作为多温度计来限制最近岩石折返的时间变化
DOI：
10.1016/j.epsl.2018.04.030
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发表时间：
2018
影响因子：
5.3
通讯作者：
J. Braun
中科院分区：
文献类型：
--
作者：
R. Biswas;F. Herman;G. King;J. Braun
岩石中的天然热释光反映了辐射诱导的热释光通过热和非热途径生长和衰减之间的动态平衡。当岩石穿过地壳并从高温冷却到低温时，这种平衡水平随着温度依赖的热衰变的减少而增加。这种现象可以用来提取岩石的热历史。热释光的主要优点是单一热释光发光曲线具有宽范围的热稳定性（寿命E。正演模拟应用于不同的时间-温度的历史，以估计不同的冷却速率的每个信号的灵敏度和限制。结果表明，可以将热历史限制在-30 °C至-80 °C之间。结果还表明，较浅的陷阱，即具有较低的激活能，可以用来限制较低的冷却历史> 100 ° C/Ma，而较深的陷阱，即具有较高的激活能，提供对较高的冷却速率（> 300 ° C/Ma）的热历史的约束。最后，我们展示了岩石挖掘的路径（即，深度对时间）可以使用逆方法来约束。新开发的方法是适用于快速冷却的样品从Namche Barwa Bagarf，喜马拉雅山东部的折返率随时间的趋势，遵循与全球温度和冰川平衡海拔线（ELA）的负相关。
Natural thermoluminescence (TL) in rocks reflects a dynamic equilibrium between radiation-induced TL growth and decay via thermal and athermal pathways. When rocks exhume through Earth's crust and cool from high to low temperature, this equilibrium level increases as the temperature dependent thermal decay decreases. This phenomenon can be exploited to extract thermal histories of rocks. The main advantage of TL is that a single TL glow curve has a wide range of thermal stabilities (lifetime E. Forward modeling is applied for different time-temperature histories to estimate the sensitivity and limitation of each signal for different cooling rates. The results show that it is possible to constrain thermal histories between ∼30 °C and ∼80 °C. The results also illustrate that shallower traps, i.e. with lower activation energies, can be exploited to constrain lower cooling histories >100 °C/Ma, whereas deeper traps, i.e. with higher activation energies, provide constraints on thermal histories for higher cooling rates (>300 °C/Ma). Finally, we show how the path of rock exhumation (i.e., depth vs. time) can be constrained using an inverse approach. The newly developed methodology is applied to rapidly cooled samples from the Namche Barwa massif, eastern Himalaya to suggest a trend in exhumation rate with time that follows an inverse correlation with global temperature and glaciers equilibrium altitude line (ELA).
影响因子：
2.7
作者：
Durcan, Julie A.;King, Georgina E.;Duller, Geoffrey A. T.
通讯作者：
Duller, Geoffrey A. T.
影响因子：
2
作者：
S. Kreutzer;Christoph Schmidt;R. DeWitt;M. Fuchs
通讯作者：
S. Kreutzer;Christoph Schmidt;R. DeWitt;M. Fuchs