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.
Preliminary 3-D structural model from the Chicxulub impact crater and its implications in the actual geothermal regime
Variations régionales du flux géothermique au Maroc, applications
Gas hydrates along the north-eastern Atlantic Margin: possible hydrate bound margin instabilities and possible release of methane
Determination of heat flow in well qincan 1 in Qinshui basin, Shanxi province
Located in Shanxi massif, Qinshui basin lies between Taihang uplift and Luliang uplift and has important structural position. It was determined by means of measurements of stratigraphic temperature and thermal conductivity that heat flow in well Qincan 1 in Qinshui basin is 44.54mW/m 2. It seems far lower than the average heat flow (76.2mW/m 2) in Shanxi graben systems.
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 …
Pattern of mantle thinning from subsidence and heat flow measurements in the Gulf of Suez: Evidence for the rotation of Sinai and along-strike flow from the Red Sea
We have undertaken a combined analysis of tectonic subsidence, heat flow and uplift data for the Gulf of Suez. Results show significant differences along the length of the rift. The heat flow and subsidence in the northern Gulf of Suez can be fitted by close to uniform extension in the early Miocene with minimal extension since the middle Miocene. In contrast, the southern Gulf of Suez requires that the early Miocene extension is followed by both continuous slow (∼1 mm/yr) extension and mantle thinning greatly in excess of the crustal thinning. The continued extension of the southern Gulf of Suez …
The geothermal field of the North Sulawesi accretionary wedge and a model on BSR migration in unstable depositional environments
Heat flow in the westernmost part of the Alpine Mediterranean system (the Rif, Morocco)
Heat flow density (HFD) and thermal gradient calculated on the basis of oil well data in the Rif vary from 50 to 90 mW/m2 and from 20 to 50°C/km, respectively. Short-term variations in the west can be attributed to water circulation and lateral heat conductivities contrast along the Pre-Rif thrusting front and at the limits between the main structural units (the Gharb basin, the South Rifian ridges and the Pre-Rif nappe). High HFD and thermal gradient values are determined in the southwest of the study area. This zone extends the central Moroccan massif which is well known by its high …
Thermal structure of the Shikoku Basin and southwest Japan subduction zone
Heat flows off southwest Taiwan:Measurements over mud diapirs and estimated from Bottom Simulating Reflectors
The area offshore from southwest Taiwan is where the Taiwan mountain belt first encroaches on the Chinese continental margin. The northwestward convergence of the Luzon Are towards the Chinese continental margin has resulted in stacking of thick sediments in terms of folds and thrusts off southwest Taiwan. Mud diapirs and bottom simulating reflectors (BSRs) are commonly observed in this region. During the field experiment, the heat probe developed by the Institute of Oceanography, National Taiwan University is found to be efficient and durable. Using the newly designed heat probe, we have conducted fourteen in situ heat flow measurements off southwest …
Quantitative method of thermal history analysis and case study
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 = …
Past temperatures directly from the greenland ice sheet
A Monte Carlo inverse method has been used on the temperature profiles measured down through the Greenland Ice Core Project (GRIP) borehole, at the summit of the Greenland Ice Sheet, and the Dye 3 borehole 865 kilometers farther south. The result is a 50, 000-year-long temperature history at GRIP and a 7000-year history at Dye 3. The Last Glacial Maximum, the Climatic Optimum, the Medieval Warmth, the Little Ice Age, and a warm period at 1930 A.D. are resolved from the GRIP reconstruction with the amplitudes -23 kelvin, +2.5 kelvin, +1 kelvin, -1 kelvin, and +0.5 kelvin, respectively. The Dye …
Geotermicheskij razrez litosfery Urala vdol' shirotnyh profilej GSZ (Geothermal section of the Ural’s lithosphere along the latitudinal profiles of the DSS )
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% …
Heat flow in Oklahoma and the south central United States
We report 23 new heat flow values in the state of Oklahoma and combine these with previously reported values to create heat flow maps of Oklahoma and the central United States. In general, thermal gradients increase from southwestern Oklahoma(minimum, 14 degrees C km(-1)) to northeastern Oklahoma (maximum, 42 degrees C km(-1)); the mean thermal gradient in central Oklahoma is 31 degrees C km(-1). We made 1498 thermal-conductivity measurements on drill cuttings from oil and gas wells. Heat flow in Oklahoma varies between 22 and 86 mW m(-2); the average is about 50 mW m-2. Heat flow is relatively low (30-40 …
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 …
Temperature and heat flow in the Celtic Sea basins
Hydrocarbon exploration wells provide sufficient information to analyse the present-day thermal regime in the Celtic Sea basins. This information consists of bottom hole temperatures (BHTs), geophysical well logs, composite logs and rock cuttings from the major formations. The BHTs provide numerous but low-quality data which require extensive processing before they provide reliable estimates of formation temperature. Standard corrections (Horner plots) to multiple BHTs can be modified to correct single EHT measurements. A least-squares inversion based on a thermal resistance (Bullard) model for conductive heat flow can map many noisy Horner-corrected BHTs into a set of formation temperature estimates with relatively …
New heat flow density data from southern Portugal: a geothermal anomaly revisited
Previous geothermal work has indicated that a geothermal anomaly with heat flow density values in excess of 200 mW/m2 exists in southern Portugal. Other geological and geophysical data from the area show no evidence of such an anomaly. To determine whether or not a geothermal anomaly occurs there, the published geothermal data and some new temperature data obtained from newly available wells, as well as from some of the previously used wells were reprocessed. The reprocessing of the published data took into consideration thermal and hydrodynamic equilibrium criteria, and so some of the wells that were previously used to draw …
Surface heat flow density at the phlegrean fields caldera (SOUTHERN ITALY)
The Phlegrean Fields area is a Holocene caldera located west of Naples, southern Italy. The recent post-caldera activity is characterized by several eruptive centers inside the collapsed area. In order to investigate the still active volcanic processes, surface heat flow measurements were carried out in 1995 in 30 sites of the Phlegrean Fields, and a heat flow map compiled. Filtering of the map reveals some well-defined anomalies superimposed on a general southward-increasing trend. Local anomalies are related to small magma bodies, whereas the observed general trend has been attributed to the effect of groundwater flow. This effect was calculated and …