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Title: 九州中部および北西部に分布する火山岩の比重および吸水量
Other Titles: Specific Gravity and Absorption of Volcanic Rocks distributed in Middle and Northwestern Parts of Kyushu, Japan
Authors: 鎌田, 泰彦
Authors (alternative): Kamada, Yasuhiko
Issue Date: 29-Feb-1976
Publisher: 長崎大学教育学部
Citation: 長崎大学教育学部自然科学研究報告. vol.27, p.95-105; 1976
Abstract: The specific gravity and absorption of water of 70 volcanic rock samples which were collected from the middle and northwestern parts of Kyushu were measured. The volcanic rocks in this surveyed area were classified into three volcanic rock series, namely, San-in, Hohi and Continental, depend upon the geologic stages of their volcame activities and lithologic characters. The San-in volcanic rock series (late Pleistocene to Recent) which is composed chiefly hornblende andesite has light specific gravity and high percentage of absorption. On the other hand, the Continental volcanic rock series (late Miocene to Pliocene/ or Plistocene) which is composed basalt has heavy specific gravity and small quantity of absorption. The Hohi volcanic rock series (early Pleistocene) is characterized by the cosisting of pyroclastic rocks and the pyroxene andesite lava flows. The Hohi volcanic rock (so-called Chikushi lava) has intermediate values of specific gravity and absorption between those of the San-in and the Continental. The increase of specific gravity according to the volcanic rock series from acidic to basic have a close relationship with the decrease of absorption of water.
URI: http://hdl.handle.net/10069/32836
ISSN: 0386443X
Type: Departmental Bulletin Paper
Text Version: publisher
Appears in Collections:No. 27

Citable URI : http://hdl.handle.net/10069/32836

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