Crystallization temperature determination of Itokawa particles by plagioclase thermometry with X-ray diffraction data obtained by a high-resolution synchrotron Gandlfi camera
Crystallization temperature determination of Itokawa particles by plagioclase thermometry with X-ray diffraction data obtained by a high-resolution synchrotron Gandlfi camera
复制标题
利用高分辨率同步加速器 Gandlfi 相机获得的 X 射线衍射数据，通过斜长石测温法测定糸川颗粒的结晶温度
DOI：
10.1111/maps.12215
复制
发表时间：
2014
影响因子：
2.2
通讯作者：
T.
中科院分区：
文献类型：
--
作者：
Tanaka;M.;Nakamura;T.;Noguchi;T.;Nakato;A.;Ishida. H.;Yada;T.;Shirai;K.;Fujiwara;A.;Ishibashi;Y.;Abe;M.;Okada;T.;Ueno;M.;Mukai;T.
利用钠质斜长石三斜性，用斜长石地质温度计估算了隼鸟号空间探测器回收的丝川表面颗粒的结晶温度。温度计所需的Δ131指数，即斜长石131和11反射之间X射线衍射峰位置的差异，是通过为SPring-8的第三代同步辐射光束线BL 15 XU开发的高分辨率同步加速器Gandolfi相机获得的。从四种颗粒的Δ131指数成功地确定了结晶温度。所观察到的斜长石结晶温度在655至660 °C的范围内。这些温度反映了峰期变质阶段之前斜长石在俯冲变质过程中的结晶温度。
The crystallization temperatures of Itokawa surface particles recovered by the space probe Hayabusa were estimated by a plagioclase geothermometer using sodic plagioclase triclinicity. The Δ131‐index required for the thermometer, which is the difference in X‐ray diffraction peak positions between the 131 and 11 reflections of plagioclase, was obtained by a high‐resolution synchrotron Gandolfi camera developed for the third generation synchrotron radiation beamline, BL15XU at SPring‐8. Crystallization temperatures were successfully determined from the Δ131‐indices for four particles. The observed plagioclase crystallization temperatures were in a range from 655 to 660 °C. The temperatures indicate crystallization temperatures of plagioclases in the process of prograde metamorphism before the peak metamorphic stage.