References
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Teplovoe pole territorii Ukrainy (Thermal field of the territory of Ukraine )
Hydrothermal heat flux through aged oceanic crust: where does the heat escape?
Recent publications suggest that most of the fluid flow in the upper oceanic crust is channelized through small volumes of rock and vented into the ocean. This implies that at flanks of generally thinly sedimented mid-ocean ridges, focused discharge at the seafloor should be concentrated most likely at outcrops, high-angle normal faults or seamounts. These vents should be associated with a significant heat flow signature. However, only few observations worldwide support this assumption up to now. On our quest for focused fluid exchange between young oceanic crust and the ocean we surveyed a 720 km long and 40–90 km wide …
Subsurface temperatures in the southern Denver Basin, Colorado
Equilibrium temperature logs and thermal conductivity values were measured in the Kiowa Cored Well to calculate a heat flow value of 56.4 ± 1.0 mW/m2 for the site. The temperatures in the Kiowa Cored Well are higher than those for a similar interval in the Castle Pines well, a research well located west of the Kiowa Cored Well. This difference in temperature is to be expected because the synorogenic sediments penetrated by the Kiowa Cored Well are finer-grained and more coal-rich than those in the Castle Pines well, resulting in a lower overall thermal conductivity in the Kiowa Cored Well. …
Geotermicheskie Is-Sledovanija V Kaliningradskoj Oblasti I Litovskoj Ssr (Geothermal exploration in the Kaliningrad region and the Lithuanian SSR )
Shallow stratigraphic drilling applied in hydrocarbon exploration of the Nordkapp Basin, Barents Sea
The Nordkapp Basin is a Late Palaeozoic rift basin characterised by numerous salt diapirs. The salt was deposited in the Late Carboniferous-Early Permian and has been remobilised several times. Upper Palaeozoic and Mesozoic sediments filled in the basin and were uplifted by salt diapirism in the Early/Middle Triassic, Late Jurassic, Late Cretaceous and Tertiary. Regional uplift and erosion in the Early Tertiary and extensive glacial erosion in the Late Pliocene/Pleistocene removed up to 1200 in of the Mesozoic and Cenozoic strata and left them heavily tilted and truncated around the salt diapirs, only covered by a thin sheet of glacial …
Temperature at the base of the seismogenic zone and its relationship to the focal depth of the western Nagano Prefecture area, Zisin
Détermination et validation du flux thermique en marge de la Norvége
New heat flow data from the Chilean coast between 36° and 40°
A heat flow map of the Dampier sub-basin
The Global Heat Flow Database of the International Heat Flow Commission. www.und/edu/org/ihfc/index2.html
Heat flow and thermal maturity modelling in the Northern Carnarvon Basin, North West Shelf, Australia
The Northern Carnarvon Basin is located at the southern end of the North West Shelf of Australia. It was developed by rifting during the Jurassic–earliest Cretaceous. Heat flow and thermal maturity in seven wells, from three sub-basins, Rankin Platform and Exmouth Plateau of the Northern Carnarvon Basin, were modelled using BasinMod 1D program. Multiple thermal maturity parameters were used to constrain the influence of anomalously low vitrinite reflectance. Those Tmax data with reliable quality can be applied to correlate with vitrinite reflectance, establish thermal maturity and calibrate the modelled results. The modelled results indicated that the measured maturity data in …
Geothermal state and fluid flow within ODP Hole 843B: results from wireline logging
Borehole fluid temperatures were measured with a wireline re-entry system in Ocean Drilling Program Hole 843B, the site of the Ocean Seismic Network Pilot Experiment. These temperature data, recorded more than 7 years after drilling, are compared to temperature data logged during Leg 136, approximately I day after drilling had ceased. Qualitative interpretations of the temperature data suggest that fluid flowed slowly downward in the borehole immediately following drilling, and flowed slowly upward 7 years after drilling. Quantitative analysis suggests that the upward fluid flow rate in the borehole is approximately 1 m/h. Slow fluid flow interpreted from temperature data …
Heat flow and thermal modeling of the Yinggehai Basin, South China Sea
Geothermal gradients are estimated to vary from 31 to 43 degreesC/km in the Yinggehai Basin based on 99 temperature data sets compiled from oil well data. Thirty-seven thermal conductivity measurements on core samples were made and the effects of porosity and water saturation were corrected. Thermal conductivities of mudstone and sandstone range from 1.2 to 2.7 W/m K, with a mean of 2.0 +/- 0.5 W/m K after approximate correction. Heat flow at six sites in the Yinggehai Basin range from 69 to 86 mW/m(2), with a mean value of 79 +/- 7 mW/m(2). Thick sediments and high sedimentation rates …
Surface heat flow, crustal temperatures and mantle heat flow in the Proterozoic Trans-Hudson Orogen, Canadian Shield
(1) The Paleo-Proterozoic (1.8 Ga) Trans-Hudson Orogen (THO), of intermediate age between the Superior (2.7 Ga) and Grenville (1.0 Ga) provinces, is located near the center of the Canadian Shield. We report on new measurements of heat flow and radiogenic heat production in 30 boreholes at 17 locations in this province. With these data, reliable values of heat flow and heat production are available at 45 sites in the THO. The mean and standard deviation of heat flow values are 42 +/- 9 mW m(-2). In this province, distinctive geological domains are associated with specific heat flow distributions. The heat …
Atlas of geothermal resources in Europe
Teplovoj potok v zonah aktivnyh razlomov na juge Vostochnoj Sibiri (Heat flow in active fault zones in the south of Eastern Siberia )
Heat flow measurements around the Antarctica - Contribution of R/V Hakurei
Various kinds of geophysical data are steadily increasing around the Antarctic Continent. However, increase rate is not so high due to severe environmental conditions such as bad sea state. Especially, heat flow data are one of the most lacking geophysical parameters. Concerning heat flow measurements in the southern ocean, contribution of Japanese R/V Hakurei is substantial. During the past two decades, R/V Hakurei has made circum Antarctic research cruises. In this paper, we summarize R/V Hakurei's heat flow data and the general feature of heat flow distribution around the Antarctica.
Distribution features of terrestrial heat flow densities in the Bohai Basin, east China
Temperature logging curves at 8 boreholes and well-testing temperature data at 142 boreholes are used to determine geotemperature gradients in the Bohai Basin. The thermal conductivities of 86 rock samples are measured at laboratory and the effects of porosity and temperature are corrected to obtain conductivities in situ. Terrestrial heat flow densities at 76 wells are determined based on these data. The distribution of the heat flow indicates that the terrestrial heat flow in the Bohai Basin is relatively high with an average value of 65.8 mW/m2. This characteristic is caused by the tectonic evolution of the basin. During Cenozoic, …
Terrestrial heat flow in Utah
Inversion of marine heat flow measurements by expansion of the temperature decay function
Marine heat flow data, obtained with a Lister-type probe, consists of two temperature decay curves, frictional and heat pulse decay. Both follow the same physical model of a cooling cylinder. The mathematical model describing the decays is non-linear as to the thermal sediment parameters thus a direct inversion is not possible. To overcome this difficulty, the model equations are expanded using a first-order Taylor series. The linearised model equations are used in an iterative scheme to invert the temperature decay for undisturbed temperature and thermal conductivity of the sediment. The inversion scheme is tested first for its theoretical limitations using …