Minerals | |
Reflectance Spectral Features and Significant Minerals in Kaishantun Ophiolite Suite, Jilin Province, NE China | |
Yanxue Liu1  Chenglong Shi1  Xiaozhong Ding1  Xiaodong Zhou2  | |
[1] Institute of Geology, Chinese Academy of Geological Sciences, No. 26 Baiwanzhuang Street, Beijing 100037, China;Survey of Regional Geological and Mineral Resource of Jilin Province, No.4177 Chaoda Road, Changchun 130022, China; | |
关键词: reflectance spectrum; ophiolite suite; mineral classification; Kaishantun; NE China; | |
DOI : 10.3390/min8030100 | |
来源: DOAJ |
【 摘 要 】
This study used spectrometry to determine the spectral absorption of five types of mafic-ultramafic rocks from the Kaishantun ophiolite suite in Northeast China. Absorption peak wavelengths were determined for peridotite, diabase, basalt, pyroxenite, and gabbro. Glaucophane, actinolite, zoisite, and epidote absorption peaks were also measured, and these were used to distinguish such minerals from other associated minerals in ophiolite suite samples. Combined with their chemical compositions, the blueschist facies (glaucophane + epidote + chlorite) and greenschist facies (actinolite + epidote + chlorite) mineral assemblage was distinct based on its spectral signature. Based on the regional tectonic setting, the Kaishantun ophiolite suite probably experienced the blueschist facies metamorphic peak during subduction and greenschist facies retrograde metamorphism during later slab rollback.
【 授权许可】
Unknown