Abstract
This study examined the thermal history of the Kumano forearc basin, as well as slope basin sediments and the accretionary prism, in the Nankai Trough, offshore Japan, using vitrinite reflectance measurements of sediments collected from Integrated Ocean Drilling Program Sites C0004, C0007, and C0009. We detected a paleothermal anomaly in the Kumano forearc basin at Site C0009 that has a 200-m-wide peak with a maximum temperature of 79 °C, ranging from 1000 to 1200 m below seafloor (mbsf). We concluded that thermal fluid is passing through the peak zone based on a curvilinear paleotemperature structure with a wide peak zone. Estimation of reflectance increase through vitrinite reaction promotion suggests that 80-100 °C thermal fluid had passed within at least 100 k.y., thus causing the anomaly. The thermal fluid upwelling could relate to thrusts and ancient splay fault activity near Site C0009.
| Original language | English |
|---|---|
| Title of host publication | Special Paper of the Geological Society of America |
| Publisher | Geological Society of America |
| Pages | 141-154 |
| Number of pages | 14 |
| ISBN (Electronic) | 9780813795348 |
| DOIs | |
| Publication status | Published - Aug 15 2018 |
Publication series
| Name | Special Paper of the Geological Society of America |
|---|---|
| Volume | 534 |
| ISSN (Print) | 0072-1077 |
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All Science Journal Classification (ASJC) codes
- Geology
Cite this
Thermal fluid migration in the Kumano forearc basin, Nankai Trough, estimated via vitrinite reflectance measurement. / Kawabata, Kuniyo; Sakguchi, Arito; Hamada, Yohei; Tsuji, Takeshi; Kitamura, Yujin; Saito, Saneatsu.
Special Paper of the Geological Society of America. Geological Society of America, 2018. p. 141-154 (Special Paper of the Geological Society of America; Vol. 534).Research output: Chapter in Book/Report/Conference proceeding › Chapter
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TY - CHAP
T1 - Thermal fluid migration in the Kumano forearc basin, Nankai Trough, estimated via vitrinite reflectance measurement
AU - Kawabata, Kuniyo
AU - Sakguchi, Arito
AU - Hamada, Yohei
AU - Tsuji, Takeshi
AU - Kitamura, Yujin
AU - Saito, Saneatsu
PY - 2018/8/15
Y1 - 2018/8/15
N2 - This study examined the thermal history of the Kumano forearc basin, as well as slope basin sediments and the accretionary prism, in the Nankai Trough, offshore Japan, using vitrinite reflectance measurements of sediments collected from Integrated Ocean Drilling Program Sites C0004, C0007, and C0009. We detected a paleothermal anomaly in the Kumano forearc basin at Site C0009 that has a 200-m-wide peak with a maximum temperature of 79 °C, ranging from 1000 to 1200 m below seafloor (mbsf). We concluded that thermal fluid is passing through the peak zone based on a curvilinear paleotemperature structure with a wide peak zone. Estimation of reflectance increase through vitrinite reaction promotion suggests that 80-100 °C thermal fluid had passed within at least 100 k.y., thus causing the anomaly. The thermal fluid upwelling could relate to thrusts and ancient splay fault activity near Site C0009.
AB - This study examined the thermal history of the Kumano forearc basin, as well as slope basin sediments and the accretionary prism, in the Nankai Trough, offshore Japan, using vitrinite reflectance measurements of sediments collected from Integrated Ocean Drilling Program Sites C0004, C0007, and C0009. We detected a paleothermal anomaly in the Kumano forearc basin at Site C0009 that has a 200-m-wide peak with a maximum temperature of 79 °C, ranging from 1000 to 1200 m below seafloor (mbsf). We concluded that thermal fluid is passing through the peak zone based on a curvilinear paleotemperature structure with a wide peak zone. Estimation of reflectance increase through vitrinite reaction promotion suggests that 80-100 °C thermal fluid had passed within at least 100 k.y., thus causing the anomaly. The thermal fluid upwelling could relate to thrusts and ancient splay fault activity near Site C0009.
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U2 - 10.1130/2018.2534(09)
DO - 10.1130/2018.2534(09)
M3 - Chapter
T3 - Special Paper of the Geological Society of America
SP - 141
EP - 154
BT - Special Paper of the Geological Society of America
PB - Geological Society of America
ER -