Mineralogical Journal
Online ISSN : 1881-4174
Print ISSN : 0544-2540
ISSN-L : 0544-2540
 
Surface microtopographies of sericite crystals formed in different environmental conditions
Ryuji KITAGAWASetsuo TAKENOIchiro SUNAGAWA
Author information
JOURNAL FREE ACCESS

1983 Volume 11 Issue 6 Pages 282-296

Details
Abstract
The gold decoration technique of electron microscopy was applied to as-grown (001) surfaces of sericite crystals collected from many localities in Hiroshima, Shimane and Yamaguchi Prefectures.
The specimens investigated exclusively exhibited growth spirals of either polygonal or circular forms with varying step separations. The morphological characteristics were critically analysed in relation to their modes of occurrence. It is demonstrated that the crystals directly precipitated from hydrothermal solutions in open fractures are characterized by circular growth spirals with narrower step separations, whereas those formed by hydrothermal metasomatism by polygonal growth spirals with wider step separations. The differences between the two are explained based on the recent understanding on spiral morphology.
Content from these authors
© 1983 Japan Association of Mineralogical Sciences
Previous article Next article
feedback
Top