Thermal stabilities of paramagnetic defect and impurity centers in quartz: Basis for ESR dating of thermal history.
Thermal stabilities of paramagnetic defect and impurity centers in quartz: Basis for ESR dating of thermal history.
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DOI：
10.2343/geochemj.25.437
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发表时间：
1991
影响因子：
0.8
通讯作者：
S. Toyoda;M. Ikeya
中科院分区：
文献类型：
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作者：
S. Toyoda;M. Ikeya
利用电子自旋共振（ESR）技术，结合等温和等时退火实验，研究了Mannari花岗岩中石英E′、Al和Ti心的热稳定性。二级衰减动力学最好地解释了结果。电子自旋共振钟开始的闭合温度估计为91°C，78°C和31°C，分别为E′，Al和Ti中心，冷却速率约为10°C/Ma。封闭温度也估计侵入岩脉周围的岩石。用ESR年龄可以研究含石英岩石不同中心的热历史。
Thermal stabilities of E′, Al, and Ti centers in quartz from the Mannari granite were investigated by electron spin resonance (ESR) with isothermal and isochronal annealing experiments. Second order decay kinetics best explain the results. The closure temperatures at which the ESR clocks start were estimated to be 91°C, 78°C, and 31°C for E′, Al, and Ti centers, respectively, with a cooling rate of about 10°C/Ma. Closure temperatures were also estimated for rocks around an intrusive dike. The thermal history of a quartz bearing rock can be investigated using ESR ages for different centers.