福建漳州复式岩体中晶洞石榴子石的裂变径迹研究

The fission track study of miarolitic garnet from Zhangzhou Igneous Complex of Fujian province

对福建漳州复式岩体中晶洞石榴子石的裂变径迹定年进行了可行性研究。经测定确认其为含锰量甚高的锰铝榴石，铀浓度变化范围为0．2－1．8μg／g（平均0．7μg／g），裂变径迹年龄为73．4±2.1Ma，诱发裂变径迹和自发裂变径迹的长度分别为11．5±0．7μm和11．0±0．8μm。

A fission track study has been conducted on the miarolitic garnet from Zhangzhou Igneous Complex. It is found that the garnet is of Mn-and Fe-rich type;its uranium concentration ranges from 0.2 to 0.8μg／g in different grains with an average of 0.7 μg/g; the fission track age of the garnet is 73.4± 2.1Ma; and the induced fission track length and the spontaneous fission track length are 11.5±0.7 μm and 11.0 ±0.8 μm, respectively.