Volcano Live
volcanolive.com
Giggenbach Volcano | John Seach
Kermadec Islands, SW Pacific
30.036 S, 178.712 E
summit elevation -65 m
submarine volcano
Giggenbach Volcano is located in the Kermadec Islands, 800 km NNE of the North Island of New Zealand.
It is a shallow water silicic volcano. Giggenbach is bimodal in composition - basalt and dacite. A shallow water crest less than 200 m depth contains numerous explosion pits and craters. These pit crater structures are located around the inner caldera rim, and are typically 30-50 m in diameter, and are at least 15-20 m deep.
A submersible dive in 2005 found diffuse low temperature venting
along a NE/SW line bisecting the main cone. The most vigorous field
vented at 205°C. Large numbers of chimney structures were found, and
were primarily composed of siliceous material containing sulphide,
or possibly pyrite.
Further Reading
Jones, B., De Ronde, C.E.J. and Renaut, R.W., 2008. Mineralized microbes from Giggenbach submarine volcano. Journal of Geophysical Research: Solid Earth, 113(B8).
Giggenbach Volcano Eruptions
No recent eruptions.