Yamano, Makoto; Uyeda, Seiya (1990): Heat-flow studies in the Peru Trench subduction zone [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.753853, Supplement to: Yamano, M; Uyeda, S (1990): Heat-flow studies in the Peru trench subduction zone. In: Suess, E; von Huene, R; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 112, 653-661, https://doi.org/10.2973/odp.proc.sr.112.171.1990
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Abstract:
New heat-flow values were obtained in the central Peru Trench area during site surveys and drilling of Ocean Drilling Program (ODP) Leg 112 by measuring temperatures with ordinary surface heat-flow probes and in the drill holes and by estimating from bottom-simulating reflectors resulting from gas hydrates. The values determined by these methods are consistent with each other within the limits of error. When combined with existing data, heat-flow distribution from the trench to the coast was delineated. Heat flow is lower than 40 mW/m**2 at the bottom of the trench and 40 to 50 mW/m**2 on the landward slope. The low heat flow at the trench bottom can be explained partly by a high sedimentation rate. Heat flow is variable about where the Mendana Fracture Zone meets the trench. This low heat flow might result from hydrothermal circulation in the fracture zone, which some scientists believe is a new propagating rift. On the landward slope, no significant difference in heat flow is recognized between the northern side and the southern side of the fracture zone, in spite of differences in the age of the subducting plate and the tectonic history. Heat flow on the landward slope may be slightly higher than that in most other subduction zones.
Project(s):
Ocean Drilling Program (ODP)
Coverage:
Median Latitude: -10.642246 * Median Longitude: -79.223095 * South-bound Latitude: -13.480160 * West-bound Longitude: -80.743300 * North-bound Latitude: -8.991500 * East-bound Longitude: -76.891500
Date/Time Start: 1985-04-04T00:00:00 * Date/Time End: 1986-12-07T02:30:00
Event(s):
112-679E * Latitude: -11.063000 * Longitude: -78.272330 * Date/Time Start: 1986-11-02T13:15:00 * Date/Time End: 1986-11-05T03:15:00 * Elevation: -462.0 m * Penetration: 359.3 m * Recovery: 36.3 m * Location: South Pacific Ocean * Campaign: Leg112 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 13 cores; 114 m cored; 0 m drilled; 31.8 % recovery
112-680 * Latitude: -11.065000 * Longitude: -78.077833 * Date/Time Start: 1986-11-05T00:00:00 * Date/Time End: 1986-11-06T00:00:00 * Elevation: -272.3 m * Penetration: 323.6 m * Recovery: 214.7 m * Location: South Pacific Ocean * Campaign: Leg112 * Basis: Joides Resolution * Method/Device: Composite Core (COMPCORE) * Comment: 36 cores; 323.6 m cored; 0 m drilled; 66.3% recovery
112-683A * Latitude: -9.028170 * Longitude: -80.406670 * Date/Time Start: 1986-11-15T07:22:00 * Date/Time End: 1986-11-18T16:30:00 * Elevation: -3087.0 m * Penetration: 419.2 m * Recovery: 217.67 m * Location: South Pacific Ocean * Campaign: Leg112 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 45 cores; 419.2 m cored; 0 m drilled; 51.9 % recovery
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
3 datasets
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Datasets listed in this publication series
- Yamano, M; Uyeda, S (1990): (Table 3) Heat-flow obtainmed from temperture measurements in ODP Leg 112 holes. https://doi.org/10.1594/PANGAEA.753852
- Yamano, M; Uyeda, S (1990): (Table 1) Heat flow measurements during the MW8506 cruise. https://doi.org/10.1594/PANGAEA.753846
- Yamano, M; Uyeda, S (1990): (Table 2) Thermal-conductivity measurements during the MW8506 cruise. https://doi.org/10.1594/PANGAEA.753847