ID 106382
Title Transcription
カガワケン ニ ブンプ スル テシマイシセイ セキゾウ ブンカザイ ノ フウカ テイド ノ ヒョウカ
Title Alternative
Evaluation of weathering grade of Teshima stone used in lithic cultural heritage, Kagawa Prefecture, Japan
Author
Nishiyama, Ken-ichi Laboratory of Geology, Institute of Socio-Arts and Sciences, University of Tokushima Tokushima University Educator and Researcher Directory KAKEN Search Researchers
Miyamoto, Kazuki Tadotsu town office
Hasegawa, Shuichi Faculty of Engineering, Kagawa University
Keywords
Teshima stone
lithic cultural heritage
pagoda
lapilli tuff
Setouchi volcanic rocks
Weathering grade
Content Type
Departmental Bulletin Paper
Description
Weathering grade of Teshima stone, Miocene lapilli tuff, used in lithic cultural heritage in Kagawa Prefecture, Japan was evaluated by using colorimeter, magnetic susceptibility meter, moisture meter and schmidt rock hammer. The stone pagodas have been exposed to weathering for 200 - 600 years, and have developed surface erosion due to weathering. Basaltic rock fragments in Teshima stone are slightly weathered based on necked-eye observation with increasing weathering period. L*-value of color index increased with increasing weathering period, however a*- and b*-values of color index and magnetic susceptibility are constant with increasing weathering period. Increasing of L* value is derived from weathering of basaltic rock fragments in Teshima stone. The results of measurement of a*-, b*- values and magnetic susceptibility suggest that mineralogical weathering such as iron mineral concentration has not occurred. The hardness of excavated cave wall surface on quarry of Teshima stone using schmidt rock hammer decreases in the entrance of the cave. Weathering properties of Teshima stone are characterized by surface erosion and rapid decreasing of rock surface hardness.
Journal Title
徳島大学総合科学部自然科学研究 = Natural Science Research, The University of Tokushima
ISSN
09146385
NCID
AN10065859
Volume
28
Issue
4
Start Page
45
End Page
53
Sort Key
45
Published Date
2014-10
EDB ID
FullText File
language
jpn
TextVersion
Publisher
departments
Science and Technology