Pressure effect on cathodoluminescence emission intensity recorded in metamorphosed detrital zircons of the Sanbagawa schists
Pressure effect on cathodoluminescence emission intensity recorded in metamorphosed detrital zircons of the Sanbagawa schists
复制标题
压力对三波川片岩变质碎屑锆石阴极发光发射强度的影响
DOI：
10.1111/iar.12444
复制
发表时间：
2022
期刊：
影响因子：
1.5
通讯作者：
Nishido H.
中科院分区：
文献类型：
--
作者：
Tsuchiya Y.;Aoki K.;Kogiso T.;Seo Y.;Aoki S.;Nishido H.
对白垩纪Sanbagawa片岩中的碎屑锆石进行了阴极发光(CL)发射和光谱分析，以描述与变质作用有关的锆石化学发光性质的变化。此外，对未变质的中新世阿什祖里火成岩锆石进行了高压和高温实验，并与三巴川锆石的化学发光强度进行了比较。因此，与低品位Sanbagawa锆石相比，高品位Sanbagawa锆石的发射强度降低。另一方面，经过HP处理的Ashizuri锆石产生的发射强度是未经处理的锆石的两倍，但不到高温处理的锆石产生的发射强度的一半。结合我们的结果和前人关于温度对锆石化学发光性质影响的研究表明，随着变质压力的增加，变质碎屑锆石的化学发光强度随温度的升高而增加。变质过程中压力对锆石发射强度的影响可能大于温度效应。
The cathodoluminescence (CL) emission and spectra analyses were conducted on detrital zircons in the Cretaceous Sanbagawa schists to describe changes in CL properties of zircons associated with metamorphism. In addition, high‐pressure (HP) and high‐temperature (HT) experiments were conducted on the non‐metamorphosed Miocene Ashizuri igneous zircons, and the CL emission intensities obtained from them were compared with those of the Sanbagawa zircons. As a result, as compared to low‐grade Sanbagawa zircons, the emission intensities of the high‐grade Sanbagawa zircons reduced. The emission intensities produced from the HP‐treated Ashizuri zircons, on the other hand, were twice as high as those generated from untreated zircons, but less than half of those generated from HT‐treated zircons. Combining our results with previous studies on the temperature influence on zircon CL properties, it indicates that increasing metamorphic pressure decreases the increase in the CL emission intensity of metamorphosed detrital zircons resulting from the increasing temperature. The pressure effect on the emission intensity of zircon during metamorphism might be larger than the temperature effect.