caa a22 4500 477062601 CHVBK 20180405111405.0 cr unu---uuuuu 170330e19961201xx s 000 0 eng 10.1007/s004450050147 doi (NATIONALLICENCE)springer-10.1007/s004450050147 Vesicle layering in solidified intrusive magma bodies: a newly recognized type of igneous structure [Elektronische Daten] [Atsushi Toramaru, Akira Ishiwatari, Maki Matsuzawa, Masaru Nakamura, Shoji Arai]  We report a novel type of layering structure in igneous rocks. The layering structure in the Ogi picrite sill in Sado Island, Japan, is spatially periodic, and appears to be caused by the variation in vesicle volume fraction. The gas phase forming the vesicles apparently exsolved from the interstitial melt at the final stage of solidification of the magma body. We call this type of layering caused by periodic vesiculation in the solidifying magma body "vesicle layering." The presence of vesicle layering in other basic igneous bodies (pillow lava at Ogi and dolerite sill at Atsumi, Japan) implies that it may be a fairly common igneous feature. The width of individual layers slightly, but regularly, increases with distance from the upper contact. The layering plane is perpendicular to the long axes of columnar joints, regardless of gravitational direction, suggesting that the formation of vesicles is mainly controlled by the temperature distribution in the cooling magma body. We propose a model of formation of vesicle layering which is basically the same as that for Liesegang rings. The interplay between the diffusion of heat and magmatic volatiles in melt, and the sudden vesiculation upon supersaturation, both play important roles. Springer-Verlag Berlin Heidelberg, 1996 Key words Vesicle layering nationallicence Liesegang ring nationallicence Igneous layering nationallicence Bubble nucleation nationallicence Diffusion nationallicence Toramaru Atsushi Department of Earth Sciences, Kanazawa University, Kanazawa, 920-11, Ishikawa, Japan. Fax: Japan-762-64-5746, JP aut Ishiwatari Akira Department of Earth Sciences, Kanazawa University, Kanazawa, 920-11, Ishikawa, Japan. Fax: Japan-762-64-5746, JP aut Matsuzawa Maki Department of Earth Sciences, Kanazawa University, Kanazawa, 920-11, Ishikawa, Japan. Fax: Japan-762-64-5746, JP aut Nakamura Masaru Department of Earth Sciences, Kanazawa University, Kanazawa, 920-11, Ishikawa, Japan. Fax: Japan-762-64-5746, JP aut Arai Shoji Department of Earth Sciences, Kanazawa University, Kanazawa, 920-11, Ishikawa, Japan. Fax: Japan-762-64-5746, JP aut https://doi.org/10.1007/s004450050147 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s004450050147 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Toramaru Atsushi Department of Earth Sciences, Kanazawa University, Kanazawa, 920-11, Ishikawa, Japan. Fax: Japan-762-64-5746, JP aut NATIONALLICENCE 700 1- Ishiwatari Akira Department of Earth Sciences, Kanazawa University, Kanazawa, 920-11, Ishikawa, Japan. Fax: Japan-762-64-5746, JP aut NATIONALLICENCE 700 1- Matsuzawa Maki Department of Earth Sciences, Kanazawa University, Kanazawa, 920-11, Ishikawa, Japan. Fax: Japan-762-64-5746, JP aut NATIONALLICENCE 700 1- Nakamura Masaru Department of Earth Sciences, Kanazawa University, Kanazawa, 920-11, Ishikawa, Japan. Fax: Japan-762-64-5746, JP aut NATIONALLICENCE 700 1- Arai Shoji Department of Earth Sciences, Kanazawa University, Kanazawa, 920-11, Ishikawa, Japan. Fax: Japan-762-64-5746, JP aut Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer