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Hokkaido University Collection of Scholarly and Academic Papers >
Graduate School of Science / Faculty of Science >
Journal of the Faculty of Science, Hokkaido University. Series 4, Geology and mineralogy >
Vol.XXI, No.3 >
The Takadomari Serpentinites in the Kamuikotan Ophiolite Belt, Hokkaido, Japan
| Title: | The Takadomari Serpentinites in the Kamuikotan Ophiolite Belt, Hokkaido, Japan |
| Authors: | Igarashi, Toshihiko Browse this author | | Katoh, Takayuki Browse this author | | Niida, Kiyoaki Browse this author |
| Issue Date: | Aug-1985 |
| Publisher: | 北海道大学 |
| Journal Title: | 北海道大学理学部紀要 |
| Journal Title(alt): | Journal of the Faculty of Science, Hokkaido University. Series 4, Geology and mineralogy |
| Volume: | 21 |
| Issue: | 3 |
| Start Page: | 305 |
| End Page: | 319 |
| Abstract: | Within the Kamuikotan Ophiolite Belt, a large serpentinite mass more than 10×12 km is observed around Takadomari as a tectonic unit of dismembered ophiolite. The Takadomari serpentinites show an east-facing layered structure composed primarily of dunite, harzburgite, and olivine-orthopyroxenite layers. More than 120 dykes of microdiorite-microgabbro were found in the serpentinite mass and clearly show an intrusive relation. The serpentinization is characterized by a progressive crystallization of antigorite replacing lizardite and chrysotile serpentines crystallized retrogressively. The Takadomari mass is regarded as a dismembered ophiolite unit which is situated at the base of the Horokanai ophiolite complex. High pressure and low temperature type metamorphic rocks such as glaucophane schist are considered to be a tectonic unit lifted up by the Takadomari serpentinites. |
| Type: | bulletin (article) |
| URI: | http://hdl.handle.net/2115/36732 |
| Appears in Collections: | Journal of the Faculty of Science, Hokkaido University. Series 4, Geology and mineralogy > Vol.XXI, No.3
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