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 in the Vøring Basin, Mid-Norwegian Shelf
In situ temperature and heat flow were determined in 1994 at 159 sites, grouped into 66 clusters between latitude 65° N and 67°30’ N at water depths from 669 m to 1464 m. The mean of all cluster heat-flow measurements conducted in this survey was 58.5 mW m−2, with a standard error of ±4.40 mW m−2. The mean heat flow from IKU well data for the Trøndelag Platform is 56.2±6.65 mW m−2. Shorter wavelength heat-flow variations appear to be controlled structurally and can be explained by sedimentation and thermal refraction effects. High heat flow associated with faulted structural highs such …
Gas hydrate stability and the assessment of heat flow through continental margins
A prominent feature across some continental margins is a bottom-simulating reflector (BSR). This seismic reflection generally coincides with the depth predicted for the base of the gas hydrate stability field. Because the occurrence of gas hydrates is controlled by temperature and pressure conditions, it has been suggested that BSRs mark an isotherm and they have therefore been used to estimate the heat flow through continental margins: crucial parameters are the temperature at BSR depth and at the seafloor and the thermal conductivity structure between the BSR and the seabed. However, very often the required parameters are not available and therefore …
Thermal regime and petroleum systems in Junggar basin, northwest China
The conversion of organic matter into oil and gas depends upon temperature and time, and the study of thermal maturation of oil-source rocks in a petroleum system is of importance for formation of a petroleum system. Based on the temperature data from 196 wells and thermal conductivity measurements of 90 core samples, altogether 35 heat flow data are obtained in the Junggar basin. The results show that the Junggar basin is a relatively "cold" basin at present, with a mean temperature gradient and heat flow of 21 degreesC/km and 42mW/m(2), respectively. Thermal history reconstructed from vitrinite reflectance data indicates that …
The GLobal Heat Flow Compilation: https://igppweb.ucsd.edu/ gabi/rem.html
Evidence of climatic warming in the southern Urals region derived from borehole temperatures and meteorological data
Thirty borehole temperature-depth profiles in the central and southern Urals, Russia were scrutinized for evidence of ground surface temperature histories. We explored two inversion schemes: a simple ramp inversion in which solutions are parameterized in terms of an onset time and magnitude of change and a more sophisticated functional space inverse algorithm in which the functional form of the solution is left unspecified. To enhance and potentially identify latitudinal differences in the ground surface temperature signal, we subdivided the data into three groups based on geographic proximity and simultaneously inverted the borehole temperature-depth logs. The simultaneous inversions highlighted 13 temperature-depth …
Submersible study of an oceanic megamullion in the central North Atlantic
Recently discovered megamullions on the seafloor have been interpreted to be the exhumed footwalls of long-lived detachment faults operating near the ends of spreading segments in slow spreading crust. We conducted five submersible dives on one of these features just east of the rift valley in the Mid-Atlantic Ridge at 26 degrees 35'N and obtained visual, rock sample, gravity, and heat flow data along a transect from the breakaway zone (where the fault is interpreted to have first nucleated in similar to2.0-2.2 Ma crust) westward to near the termination (similar to0.7 Ma). Our observations are consistent with the detachment fault …
Estimates of geothermal gradients and heat flow from BSRs along the western continental margin of India
Geothermal gradients and heat flow were estimated from the position of Bottom Simulating Reflectors (BSRs) identified on seismic reflection sections from the Western Continental Margin of India (WCMI). The estimated geothermal gradients along the WCMI range between 35 to 65 degreesC/km and heat flow varies from 50 to 130 mW/m(2). The geothermal gradient structure of WCMI inferred from the BSRs, shows a landward decrease in heat flow coupled with a high heat flow zone in the north and relatively low heat flow zone at the southern end. A decrease of sediment thickness proximal to the ocean/continent boundary could explain these …
Régimen Térmico en la Peninsula Ibérica. Estructura Litosférica a través del Macizo Ibérico y el Margen Surportugués
Heat flow of Copahue geothermal field, and its relation with tectonic scheme
Norwegian-Greenland Sea thermal field
Heat flow and deep thermal structure near the southeastern edge of the Canadian Shield
Heat flow measurements in 4 deep drillholes near Voisey Bay, Labrador, have yielded the lowest value ever reported in the Canadian Shield, 22 mW m(-2). This very reliable-estimate is also one of the lowest continental heat flow values world wide. It requires the crust to be very poor in radioelements in this part of the Archean Nain Province. It also strongly supports the view that mantle heat flow is low (< 15 mW m(-2)) throughout the Canadian Shield, with no trend of increasing mantle heat flaw near the edges of the continent. It also raises questions about the controlling …
Thermal data collection and heat flow recalculations for Ocean Drilling Program Legs 101–180
Analysis of Downhole Logging Data from CRP-2/2A, Victoria Land Basin, Antarctica: a Multivariate Statistical Approach
Heat flow in the continental area of China: a new data set
A new compilation of heat flow data for the continental area of China has been constructed using both published data (up to 1999) as well as previously unpublished data. The data set is composed of 862 observations from different sites. Within the continental area of China, heat flow values range from 23 to 319 mW/m(2), with a mean of 63 +/- 24.2 mW/m2. If non-conductive values related to local hydrothermal systems are excluded, the representative average heat flow is 61 +/- 15.5 mW/m(2) (n = 823), with an associated range of 30-140 mW/m(2). Heat flow analysis for each specific subtectonic …
Heat flow, deep temperature and thermal structure across the orogenic belts in Southeast China
The pattern of heat flow density in Southeast China is presented in the form of heat flow map based on 150 values of heat flow measured in recent years. A two-dimensional numerical solution of the heat conduction equation was used to calculate the temperature held to a depth of 60 km along two geotraverses: the 360 km long Wenzhou-Tunxi (WT) and the 1000 km long eastern segment of the Quanzhou-Heishui (QH), They cross all the major tectonic elements of orogenic belts in Southeast China. The steady-state model was solved using the finite element method. The distribution of heat production was …
Thermal history recovery and comparative research on Jiuquan basin group
Jiuquan basin group is formed by the stacking of two-stage basins with different property and different generation. It was rift basin in Late Jurassic-Early Creaceous and squeezed sag basin since Cenozoic. The present geothermal gradient between 2.5 degrees C/100m and 3.00 degrees C/100m and heat flow between 50mW/m(2) and 57mW/m(2) is low in Jiuquan basin group. Jiuquan basin group is rift basin and its palaeothermal gradient is higher in late Mesozoic, which reached 3.75-4.50 degrees C/100m. The thermal gradient has decreased since Cenozoic. Huahai basin and Shibei depression of Jiuxi basin have subsided at a small increase since Cenozoic, the …
Site 1150
Site 1151
Leg 186 Summary
Heat flow variations from bottom simulating reflectors on the Cascadia margin
A bottom simulating reflector (BSR), representing the base of the gas hydrate stability field, was observed over a closely spaced grid of seismic lines on the continental slope of the northern Cascadia margin. A simple conductive model was used to calculate heat Row from the depth of the BSR. A regional trend was observed, in which heat flow decreased landward across the margin from an average of similar to 80 mW/m(2) at a distance of 15 km from the deformation front to similar to 65 mW/m(2) at a distance of 40 km. This trend reflects the processes of tectonic thickening …