Literature Review
The Global Heat Flow Database (GHFDB) is committed to maintaining the highest standards of data quality. To achieve this, we have implemented a rigorous literature review process that ensures all datasets are thoroughly vetted before being made publicly available. To learn more about the review process and how you can contribute, please click the button below.
Heat-flow density across the Central Andean subduction zone
New and revised heat-flow density determinations for the Central Andes in Chile and Bolivia between 60 degrees and 75 degrees W and between 15 degrees and 30 degrees S are presented. Heat flow was determined from temperature logs obtained from fourteen boreholes in northern Chile and from a large Bottom-Hole Temperature (BHT) data set in Bolivia. Thermal data were corrected for perturbations resulting from drilling, topography, and fluid circulation, and effects of porosity and temperature were considered in adjusting thermal conductivity for in-situ conditions. Thus, the 74 reliable heat-how values available were used to interpret heat flow in the context …
Heat flow, heat production, and lithospheric thermal regime in the Iberian Peninsula
The first heat-flow and heat-production maps of the Iberian Peninsula and its margins using previously acquired data are presented. The surface heat-flow map includes 553 determinations carried out on water and mining exploration wells, oil exploration wells and on the seafloor. The surface heat flow varies noticeably from the Iberian mainland (65 ± 10 mW m−2) to the Atlantic and the Mediterranean margins, where the heat flow reaches values of about 40–50 mW m−2 and 80–100 mW m−2, respectively. The heat-production map consists of 664 determinations carried out on rock samples from the Variscan Iberian Massif and the Betics. The …
Heat flow and geothermal model of the Black Sea depression
The Black Sea basin is a deep depression within the Alpine folded belt. The total thickness of Cretaceous-Quaternary sediments in the central part reaches 14–18 km. The Earth's crust thickness is reduced to 22–28 km. The depression is featured by low heat flow. Minimal (< 30 mW/m2) heat flow values are marked in the central part of the basin within the maximal sediments thickness. The effect of crustal structure, sedimentation, heat generation and near-floor temperature variation has been estimated based on numerical modelling of heat transfer conditions. The crust and upper mantle heat flow density and temperature have been …
Geothermal characteristics of the Vorotilovo deep borehole drilled into the Puchezh-Katunk impact structure
The Vorotilovo borehole, 5374 m in depth, was drilled in 1989-1992 in the central part of the large Puchezh-Katunk impact structure, which is located in the East European Platform (lat. 57.1 degrees N, long. 43.6 degrees E). The geothermal studies of the borehole section were based on the temperature logging of the entire borehole (1992-1995), on the thermal conductivity measurements for more than 3700 air-dry and fluid-saturated core samples under normal P-T conditions and for 473 samples at a temperature up to 100 degrees C; the rock anisotropy was taken into account in these measurements. Significant local vertical variations (+/-20-30% …
Geotermicheskij razrez litosfery Urala vdol' shirotnyh profilej GSZ (Geothermal section of the Ural’s lithosphere along the latitudinal profiles of the DSS )
Quantitative method of thermal history analysis and case study
Gas hydrates along the north-eastern Atlantic Margin: possible hydrate bound margin instabilities and possible release of methane
Present heat flow and paleo-geothermal regime in the Canadian Arctic margin: analysis of industrial thermal data and coalification gradients
Calculations of the present geothermal gradient and terrestrial heat flow were made on 156 deep wells of the Canadian Arctic Archipelago. Corrected bottom hole temperature (BHT) data and drill stem test (DST) temperatures were used to determine the thermal gradients for sites for which the quality of data was sufficient. Thermal gradients evaluated for depths below the base of permafrost for the onshore wells and below sea bottom for the offshore wells were combined with the estimates of effective thermal conductivity to approximate heat flow for these sites. The present geothermal gradient is in the 15-50 mK/m range (mean = …
Heat flow and thermal history of the Anadarko Basin, Oklahoma
New heat-flow values for seven sites in the Anadarko basin, Oklahoma, were determined using high-precision temperature logs and thermal conductivity measurements from nearly 300 core plugs, Three of the sites are on the not-them shelf, three sites are in the deep basin, and one site is in the frontal fault zone of the northern Wichita Mountains. The heat flow decreased from 55 to 64 mW/m(2) in the north, and from 39 to 54 mW/m(2) in the south, due to a decrease in heat generation in the underlying basement rock toward the south, Lateral lithologic changes in the basin, combined with …
Heat flow and deep temperatures in the Chaves geothermal system, Northern Portugal
The geological, geoelectrical, geochemical and temperature data related to the Chaves geothermal system have been integrated to obtain a better understanding of the Chaves basin. Geoelectrical surveys carried out in the basin reveal a low-resistivity zone (10 ohm m), associated with a shallow geothermal reservoir, in the central part of the graben, bounded by higher-resistivity rocks. The top of this zone varies between 400 and 200 m and its maximum thickness (1600 m) is located at the centre of the basin. Thermal models for the Chaves basin and for the region are presented using the structure obtained by geoelectrical methods …
Paleotemperature gradient and thermal history of Tulufan-Hami Basin,Xinjiang
Teplovoj potok Sahalina i Juzhnyh Kuril'skih ostrovov (Heat flow of the Sakhalin and the South Kuril islands )
THE FIRST LITHUANIAN GEOTHERMAL BOREHOLE VIDMANTAI-1
Heat Flow Map of East and Southeast Asia
Thermal regime of the San Andreas fault near Parkfield, California
Knowledge of the temperature Variation with depth near the San Andreas fault is Vital to understanding the physical processes that occur within the fault zone during earthquakes and creep events. Parkfield is near the southern end of the Coast Ranges segment of the San Andreas fault. This segment has higher mean heat flow than the Cape Mendocino segment to the northwest or the Mojave segment to the southeast. Boreholes were drilled specifically for the U.S. Geological Survey's Parkfield earthquake prediction experiment or converted from other uses at 25 sites within a few kilometers of the fault near Parkfield. These holes, …
Hydrothermal regime and constraints on reservoir depth of the Jade site in the Mid-Okinawa Trough inferred from heat flow measurements
Detailed heat flow measurements revealed an enormous heat flow variation (10(2) to 10(5) mW m(-2)) in the Jade hydrothermal field (27 degrees 16'N, 127 degrees 05'E and water depth 1350 m) located on the slope of the Izena Hole in the Mid-Okinawa Trough. Within the Jade site, heat flow is higher than 1000 mW m(-2) and decreases to similar to 100 mW m(-2) with a 1 km horizontal scale. Near the Jade black smoker, heat flow varies from >30,000 mW m(-2) at a hydrothermally altered area to 1700 mW m(-2) less than 100 m from it. A large-scale heat flow …
Heat flow over Reunion hot spot track: Additional evidence for thermal rejuvenation of oceanic lithosphere
We present 99 new heat flow determinations obtained with a regular sampling (2-3 km) along two seismic profiles across the Mascarene Ridge, Indian Ocean. This aseismic ridge is volcanic relief due to the activity of a hot spot, now responsible of the active volcanism of Reunion Island. Our sampling technique allows us to identify short-wavelength processes such as slope-driven water flows that affect heat flow on the ridge. With the exception of these perturbed sites, heat flow appears to be very uniform across the ridge and significantly higher (6-8 mW m(-2)) than the reference heat how predicted for the seafloor …
Conductive heat loss in recent eruptions at mid-ocean ridges
A new technique for measuring conductive heat flow from unsedimented volcanic rocks on the sea floor has been tested on two new eruption sites in the NE Pacific. This technique consists of isolating the surficial rocks from sea water using water-saturated urethane foam as an insulating thermal blanket. The thermal gradient transferred from the outcrop to the thermal blanket is a quantitative measurement of the conductive heat flow that takes place in unsedimented volcanic areas. We deployed two thermal blankets at 13 sites on the 1993 and 1996 Juan de Fuca/Gorda Ridge flaws and found (1) a fact-or of 10 …