Nagao, Toshiyasu (1990): Heat flow measurements in the Weddell Sea [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.726376, Supplement to: Nagao, T (1990): Heat flow measurements in the Weddell Sea, Antarctica: ODP Leg 113. In: Barker, PF; Kennett, JP; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 113, https://doi.org/10.2973/odp.proc.sr.113.183.1990
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Abstract:
From January to March 1987, heat flow measurements were tried at four sites (Sites 689, 690, 695, and 696) during ODP Leg 113, in the Weddell Sea, Antarctica. At Site 690 (Maud Rise), a convex upward shaped temperature vs. depth profile was observed. This profile cannot be explained by steady-state conduction through solid materials only. We conclude that the minimum heat flow value at Site 690 is 45 mW/m2. A prominent bottom simulating reflector (BSR) was observed at 600 mbsf at Site 695. However, the observed temperature is too high to explain the BSR as a gas hydrate. The origin of the BSR remains unknown, although it is probably of biogenic origin as observed in the Bering Sea during DSDP Leg 19. After correcting for the effects of sedimentation, heat flow values at Sites 695 and 696 are 69 and 63 mW/m2, respectively. Furthermore, we compiled heat flow data south of 50°S. In the Weddell Sea region, the eastern part shows relatively low heat flow in comparison with the western part, with the boundary between them at about 15°W longitude.
Project(s):
Ocean Drilling Program (ODP)
Coverage:
Median Latitude: -63.479500 * Median Longitude: -20.519975 * South-bound Latitude: -65.161000 * West-bound Longitude: -43.451600 * North-bound Latitude: -61.849000 * East-bound Longitude: 3.099900
Date/Time Start: 1987-01-16T08:00:00 * Date/Time End: 1987-02-24T16:30:00
Event(s):
113-689B * Latitude: -64.517000 * Longitude: 3.099900 * Date/Time Start: 1987-01-16T08:00:00 * Date/Time End: 1987-01-18T06:45:00 * Elevation: -2091.0 m * Penetration: 297.3 m * Recovery: 229.45 m * Location: South Atlantic Ocean * Campaign: Leg113 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 33 cores; 297.3 m cored; 0 m drilled; 77.2 % recovery
113-690B * Latitude: -65.161000 * Longitude: 1.204900 * Date/Time Start: 1987-01-20T03:15:00 * Date/Time End: 1987-01-21T07:00:00 * Elevation: -2925.0 m * Penetration: 213.4 m * Recovery: 214.75 m * Location: South Atlantic Ocean * Campaign: Leg113 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 25 cores; 213.4 m cored; 0 m drilled; 100.6 % recovery
113-695A * Latitude: -62.391000 * Longitude: -43.451600 * Date/Time Start: 1987-02-20T09:30:00 * Date/Time End: 1987-02-23T10:00:00 * Elevation: -1311.0 m * Penetration: 345.1 m * Recovery: 254.39 m * Location: Weddell Sea * Campaign: Leg113 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 37 cores; 348.6 m cored; 0 m drilled; 73 % recovery
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
4 datasets
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Datasets listed in this publication series
- Nagao, T (1990): (Table 1) Thermal conductivity, porosity, wet weight water content, bulk and grain density, and sonic velocity of ODP Hole 113-689B. https://doi.org/10.1594/PANGAEA.726371
- Nagao, T (1990): (Table 1) Thermal conductivity, porosity, wet weight water content, bulk and grain density, and sonic velocity of ODP Hole 113-690B. https://doi.org/10.1594/PANGAEA.726372
- Nagao, T (1990): (Table 1) Thermal conductivity, porosity, wet weight water content, bulk and grain density, and sonic velocity of ODP Hole 113-695A. https://doi.org/10.1594/PANGAEA.726373
- Nagao, T (1990): (Table 1) Thermal conductivity, porosity, wet weight water content, bulk and grain density, and sonic velocity of ODP Hole 113-696A. https://doi.org/10.1594/PANGAEA.726374