References
This section lists all references that have been added to this portal. You can search and filter references by type, author, title, and other metadata. Each reference may include a DOI, publication date, and other relevant information to help you find and cite the literature effectively.
Heat Flow Evidence for Hydrothermal Circulation in Oceanic Crust Offshore Grays Harbor, Washington
We report 30 new conductive heat flow measurements collected on the Juan de Fuca plate, offshore of Grays Harbor, Washington, just seaward of the deformation front. The data were collected along Cascadia Open-Access Seismic Transect Lines 4 and 5. A prominent basement high associated with a rift propagation pseudofault is imaged near the western end of Line 4. Lithospheric conductive cooling models, for 9 Ma oceanic crust, predict that heat flow should be similar to 175 mW m(-2). Just seaward of the deformation front heat flow values corrected for the impact of sedimentation are similar to 200 mW m(-2) and …
Heat Flow and Seismicity in Bulgaria
Estimation of Geothermal Gradient, Geothermal Heat Flux and Thermal Conductivity of Rocks in Western Niger Delta Using Well Log Data
Analysis of the relation between bottom hole temperature data and Curie temperature depth to calculate geothermal gradient and heat flow in Coahuila, Mexico
Estimations of the Curie temperature depth using aeromagnetic data are commonly employed to study the thermal structure of the crust. In this research, we estimated the Curie temperature-depth with the “de-fractal” method and calculated the geothermal gradient and the heat flow of 24 blocks uniformly distributed in the Mexican state of Coahuila. The reliability of the “de-fractal” method was evaluated by comparing the geothermal gradient results with the Bottom Hole Temperature data available from petroleum boreholes. The maps show that the regional faulting is associated with recent volcanism characterized by shallow Curie temperature-depth ( 17 km); furthermore, changes of the …
Temperature-depth curves and heat flow in central part of Anatolia, Turkey
The objective of this study is to determine the crustal thermal regime of Central Anatolia Province and its relationship with regional tectonics. Investigations include new temperature-depth measurements in wells, calculations of geothermal gradients from new and previously measured temperature logs, and determinations of heat flow with terrain corrections if necessary. The results provide us with a better understanding of the regional distribution of subsurface temperatures and heat flow within the study area. Although Central Anatolia Province is bordered with tectonically active areas, moderate heat flow values (64 +/- 16 mW m(-2)) are generally observed within the region in accordance with …
Elevated geothermal surface heat flow in the Amundsen Sea Embayment, West Antarctica
The thermal state of polar continental crust plays a crucial role for understanding the stability and thickness of large ice sheets, the visco-elastic response of the solid Earth due to unloading when large ice caps melt and, in turn, the accuracy of future sea-level rise prediction. Various studies demonstrate the need for precise measurements and estimation of geothermal heat flow (GHF) in Antarctica for better constrained boundary conditions to enhance the ice sheet model performance. This study provides ground-truth for regional indirect GHF estimates in the Amundsen Sea Embayment, which is part of the West Antarctic Rift System, by presenting …
Heat flow and thermal evolution of a passive continental margin from shelf to slope – A case study on the Pearl River Mouth Basin, northern South China Sea
The Pearl River Mouth Basin (PRMB), the largest basin in the northern continental margin of the South China Sea (SCS), has been one of the key areas to characterize geothermal field and thermal evolution of a passive continental margin. The thermal history of the Pearl River Mouth Basin is related to the seafloor spreading of the SCS in the late Early Oligocene. Heat flow measurements show that the PRMB is characterized by a high background heat flow with average heat flow of 71.8 ± 13.6 mW/m2. The present-day heat flow of the northern SCS increases from the northern shelf with …
Geothermal field and geology of the Caspian Sea region
The Caspian Sea and adjacent areas form the vast oil and gas-bearing megabasin. It consists of North Caspian, Middle Caspian, and South Caspian sedimentary basins. The granite-metamorphic basement of the basins becomes from north to south younger in the direction from Early Precambrian to Early Cimmerian age. It represents a transitional zone from the southern edge of the East European Craton to Alpine folding. Geothermal investigations have been carried out both in hundreds of deep boreholes and within the Caspian Sea and a few preliminary heat flow maps were published for the Caspian Sea region. All they excluded from consideration …
Heat Flow in the Western Arctic Ocean (Amerasian Basin)
Abstract From 1963 to 1973 the U.S. Geological Survey measured heat flow at 356 sites in the Amerasian Basin (Western Arctic Ocean) from a drifting ice island (T-3). The resulting measurements, which are unevenly distributed on Alpha-Mendeleev Ridge and in Canada and Nautilus Basins, greatly expand available heat flow data for the Arctic Ocean. Average T-3 heat flow is 54.7 ± 11.3 mW/m2, and Nautilus Basin is the only well-surveyed area ( 13% of data) with significantly higher average heat flow (63.8 mW/m2). Heat flow and bathymetry are not correlated at a large scale, and turbiditic surficial sediments (Canada and …
Heat Flow in Southern Australia and Connections With East Antarctica
Viscosity and melt generation at the base of ice sheets are critically dependent upon heat flow. Yet subglacial heat flow is poorly constrained due to the logistical challenges of obtaining boreholes that intersect the bedrock beneath thick ice cover. Currently, continental estimates of Antarctic heat flow are derived from geophysical methods that provide ambiguous constraints of crustal heat sources, despite their demonstrated importance for accurate predictions of future ice sheet behavior. This study pursues an alternative approach by using heat flow measurements from rock units in the Coompana Province of southern Australia, which represent the geological counterparts of those beneath …
Present Terrestrial Heat Flow Measurements of the Geothermal Fields in the Chagan Sag of the Yingen-Ejinaqi Basin, Inner Mongolia, China
Owing to the lack of terrestrial heat flow data, studying lithospheric thermal structure and geodynamics of the Yingen-Ejinaqi Basin in Inner Mongolia is limited. In this paper, the terrestrial heat flow of the Chagan sag in the Yingen-Ejinaqi Basin were calculated by 193 system steady-state temperature measurements of 4 wells, and newly measuring 62 rock thermal conductivity and 20 heat production rate data on basis of the original 107 rock thermal conductivity and 70 heat production data. The results show that the average thermal conductivity and heat production rate are 2.11±0.28 W/(m·K) and 2.42±0.25 μW/m3 in the Lower Cretaceous of …
Teplovoj potok i neftegazonosnost' (poluostrov Jamal, Tomskaja oblast') (Heat flow and presence of oil and gas (the Yamal peninsula, Tomsk region) )
Thermal regime of the lithosphere and geothermal potential in Xiong'an New Area
Investigation into the thermal regime of lithosphere is an essential part of geothermal research. The thermal state of lithosphere can be expressed as the vertical distribution of temperature. It has been found that the thermal regime of lithosphere can control the heat flow distribution and the geothermal mechanism of local geothermal fields. In this work, equilibrium temperature logs were obtained from 27 wells, and thermal conductivity and heat generation data were collected from 148 rock samples from different wells. Besides, 55 high-quality terrestrial heat flow values were extracted. Based on these data, the distribution of heat flow across Xiong'an New …
Revisiting the data reduction of seafloor heat-flow measurement: The example of mapping hydrothermal venting site around Yonaguni Knoll IV in the South Okinawa Trough
Yonaguni Knoll IV is an active hydrothermal venting site located on the southern tip of a cross back-arc volcanic trail in the South Okinawa trough. We have compiled 22 heat-flow measurements on the seafloor around the Yonaguni Knoll IV site that reveal drastic heat-flow spatial variation. To obtain the appropriate heat-flow measurements from our recently rebuilt Lister-type marine heat probe, we have updated the processing algorithm in this study to avoid utilizing the sometimes-unstable temperature evolving data from the frictional heating stage. We have carefully calibrated and processed the observed data to yield robust estimates of the seafloor heat-flow emphasizing …
Evolution of heat flow, hydrothermal circulation and permeability on the young southern flank of the Costa Rica Rift
Heat flow, heat production, thermal structure and its tectonic implication of the southern Tan-Lu Fault Zone, East–Central China
We present new heat flow and heat production data to constrain the lithospheric thermal structure along the southern Tan-Lu Fault Zone (STLFZ), a continuous active deep crustal fault zone in East Asia, and use these thermal data to infer how the thermal structure of the STLFZ influences regional focal depths. We report five new high-quality heat flow measurements derived from temperature–depth profiles at five well sites and detailed thermal conductivity measurements of 13 outcrop samples and 115 dry core samples from five wells along the STLFZ. We analyze these new data in combination with published data to derive a thermal …
Present-day geothermal regime of the Uliastai Depression, Erlian Basin, North China
Terrestrial heat flow of continental China: Updated dataset and tectonic implications
Terrestrial heat flow is a crucial parameter to indicate the thermal state within the Earth, containing integrated information of the ground temperature, thermal conductivity, and crustal/mantle heat flow. We present an updated heat flow dataset and map in continental China. The data increases from 862 to 1230 observations since the year 1999 and the sites cover the major tectonic units, although their spatial distribution remains uneven. Excluding the local anomalies related to hydrothermal activities, the background heat flow values display a range from 30 to 140 mW m(-2) with a mean of 60.4 +/- 12.3 mW m(-2). The updated heat …
OB ASIMMETRII TEPLOVOGO POTOKA V MANTIJNYH PLJuMAH (Heat Flow Asymmetry in Mantle Plumes )
Mapping the Gawler Craton–Musgrave Province interface using integrated heat flow and magnetotellurics
The approximate position of a terrane boundary between the Archean-Mesoproterozoic Gawler Craton and the Meso-Neoproterozoic Musgrave Province, central Australia, is currently inferred from magnetic and gravity anomalies. However, its precise location, structural architecture and tectonic attributes are poorly understood. Thick overlying sediments of the Neoproterozoic Officer Basin restrict outcropping basement, and the number of basement-intersecting drill holes across the proposed boundary is limited. The Gawler Craton-Musgrave Province interface is critical to interpreting the tectonic relationship between these adjacent terranes, providing insights into the mechanism of Australian Proterozoic assembly. To assist its geophysical identification, we present 14 new heat flow estimates …