Temperature measurements at IODP 337 expedition, off Shimokita, NE Japan

Author(s): Yamada, Y.; Sanada, Y.; Moe, K.; Kubo, Y.; Inagaki, F.
Author Affiliation(s): Primary:
Kyoto University, Kyoto, Japan
Other:
Japan Agency for Marine-Earth Science and Technology, Japan
Volume Title: AGU 2014 fall meeting
Source: American Geophysical Union Fall Meeting, Vol.2014; American Geophysical Union 2014 fall meeting, San Francisco, CA, Dec. 15-19, 2014. Publisher: American Geophysical Union, Washington, DC, United States
Note: In English
Summary: Precise estimation of underground temperature is a challenging issue, since direct measurements require drill holes that disturb the original underground environment. During IODP 337 expedition, we have obtained in-situ temperature datasets for several times by using geophysical logging tools. A common procedure to estimate the undisturbed maximum underground temperature is by approximating that the 'build-up' pattern of measured values in the borehole should reach to the equilibrium temperature. At the Shimokita site, this was 63.7°C at a depth of 2466 m. We have much more measurement dataset and all of these were used to analyze detailed in-site temperatures at various depths. The result shows a non-linear temperature profile to the depth and this may be reflected by the thermal properties of the surrounding rocks.
Year of Publication: 2014
Research Program: IODP Integrated Ocean Drilling Program
Key Words: 07 Marine Geology and Oceanography; Aomori Japan; Asia; Expedition 337; Far East; Honshu; Integrated Ocean Drilling Program; Japan; North Pacific; Northwest Pacific; Pacific Ocean; Shimokita Peninsula; Temperature; West Pacific
Coordinates: N411035 N411036 E1421202 E1421201
Record ID: 2015106211
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