Using thermal remanent magnetisation (TRM) to distinguish block and ash flow and debris flow deposits, and to estimate their emplacement temperature: 1991–1995 lava dome eruption at Mt. Unzen Volcano, Japan

2015 ◽  
Vol 303 ◽  
pp. 92-111 ◽  
Author(s):  
D. Uehara ◽  
R.A.F. Cas ◽  
C. Folkes ◽  
S. Takarada ◽  
H. Oda ◽  
...  
Keyword(s):  
Debris Flow ◽  
Lava Dome ◽  
Emplacement Temperature ◽  
Unzen Volcano ◽  
Remanent Magnetisation

Growth and potential collapse of the lava dome in Unzen volcano and the estimation on block-and-ash flows

2018 ◽  
Vol 22 (2) ◽  
pp. 273-286
Author(s):  
Xiao Shi ◽  
Yujing Jiang ◽  
Yasuyuki Hirakawa
Keyword(s):  
Lava Dome ◽  
Unzen Volcano

scholarly journals Effect of rainfall on dacitic lava dome collapse at Unzen volcano, Japan.

1998 ◽  
Vol 48 (3) ◽  
pp. 73-78 ◽  
Author(s):  
Hitoshi Yamasato ◽  
Sadayuki Kitagawa ◽  
Manabu Komiya
Keyword(s):  
Lava Dome ◽  
Unzen Volcano ◽  
Dacitic Lava ◽  
Dome Collapse ◽  
Lava Dome Collapse

scholarly journals Scientific Results of Conduit Drilling in the Unzen Scientific Drilling Project (USDP)

2005 ◽  
Vol 1 ◽  
pp. 18-22 ◽  
Author(s):  
S. Nakada ◽  
K. Uto ◽  
S. Sakuma ◽  
J. C. Eichelberger ◽  
H. Shimizu
Keyword(s):  
Lava Dome ◽  
Hydrothermal Fluids ◽  
Seismic Signals ◽  
Directional Drilling ◽  
Geological Investigation ◽  
Unzen Volcano ◽  
Scientific Drilling ◽  
Core Samples ◽  
Scientific Results ◽  
Drilling Project

Directional drilling at Unzen Volcano in Japan during mid of 2004 penetrated the magma conduit and successfully recovered samples of the lava dike that is believed to have fed the 1991–1995 eruption. The dike was sampled about 1.3 km below the volcano’s summit vent and is intruded into a broader conduit zone that is 0.5 km wide. This zone consists of multiple older lava dikes and pyroclastic veins and has cooled to less than 200 ˚C. The lava dike sample was unexpectedly altered, suggesting that circulation of hydrothermal fluids rapidly cools the conduit region of even very active volcanoes. It is likely that seismic signals monitored prior to emergence of the lava dome reflected fracturing of the country rocks, caused by veining as volatiles escaped predominantly upward, not outward, from the rising magma. Geophysical and geological investigation of cuttings and core samples from the conduit and of bore-hole logging data continues. <br><br> doi:<a href="http://dx.doi.org/10.2204/iodp.sd.3.01.2006" target="_blank">10.2204/iodp.sd.3.01.2006</a>

Origin of volcanic gases discharging from a cooling lava dome of Unzen volcano, Japan

2008 ◽  
Vol 175 (1-2) ◽  
pp. 133-140 ◽  
Author(s):  
Hiroshi Shinohara ◽  
Takeshi Ohba ◽  
Kohei Kazahaya ◽  
Hiroshi Takahashi
Keyword(s):  
Lava Dome ◽  
Volcanic Gases ◽  
Unzen Volcano

Juvenile volcanic glass erupted before the appearance of the 1991 lava dome, Unzen volcano, Kyushu, Japan

1999 ◽  
Vol 89 (1-4) ◽  
pp. 113-121 ◽  
Author(s):  
Koichiro Watanabe ◽  
Tohru Danhara ◽  
Kazunori Watanabe ◽  
Kunihisa Terai ◽  
Tohru Yamashita
Keyword(s):  
Lava Dome ◽  
Volcanic Glass ◽  
Unzen Volcano
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