References
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Heat flow study along the iv ggt china
Sedimentary processes, eustatism, subsidence and heat flow in the distal part of the Niger Delta
The Niger Delta, situated at the West African margin of the gulf of Guinea, is a large, arcuate delta of the destructive, wave-dominated type. Five lithostratigraphic units are defined from well-log interpretations corresponding to the Akata, Agbada and Benin Formations. The delta is composed of an overall coarsening and thickening-up regressive sequence. Deltaic sequences are regrouped into two mesosequences with a limit (about 11 My) which coincides with a lowstand wedge. Synsedimentary faults located on both the Eastern and Western Delta probably originate from the basement. Tectonic subsidence at the top of the Akata Formation is subjected to the effects …
Geothermal state of DSDP holes 333A, 395A and 534A: Results from the Dianaut program
Heat-Flow in the Valencia Trough - Geodynamic Implications
As part of the Valsis project, 110 heat-flow determinations were obtained in the axial, deep part of the Valencia trough during the Valsis 1 cruise of the R/V Le Suroit in 1988. The data gathered data provide a fairly comprehensive view of the regional heat-flow pattern. Regional heat flow increases from a value of 66 +/- 4 mW/m2 to the north of Menorca to 88 +/- 4 mW/m2 in the southern part of the rift between Valencia and Ibiza. A simple rifting model, assuming uniform stretching of the lithosphere during a single rifting event from 28 to 22 Ma ago, …
Heat flow measurements in Southeast China
Heat-Flow and Fluid-Flow Regime in the Western Nankai Accretionary Prism
The thermal structure of the western Nankai subduction zone has been studied through surface heat flow measurements with conventional geothermal probes and estimation of heat flow from depths of gas hydrate bottom simulating reflectors. Temperature and thermal conductivity measurements at ODP Site 808, located at the toe of the Nankai accretionary prism, added important information on any variation in heat flow with depth and thus on thermal effects of pore fluid flow in the prism. Surface heat flow is generally higher than 130 mW/m2 on the floor of the Nankai Trough. Such high heat flow cannot be explained simply by …
Heat flux measurements of boreholes in East Fujian Province
Report on the first batch of measured geothermal flow data in Jiangxi Province
Heat-flow data and shallow thermal regime on Mallorca and Menorca (western Mediterranean)
The first heat-flow density values acquired on the Balearic Islands are presented. A total of 39 thermal gradient determinations were carried out, 23 on Mallorca and 16 on Menorca. The sampling points consist of water exploration wells whose depths range between 100 m and 250 m. Most of the thermometric logs are strongly affected by water circulation through the formation and/or through the borehole. Heat-flow density measurements have been performed from 18 boreholes where conductive heat transport is inferred. Thermal conductivity values were obtained from 52 available well core samples covering the main lithologies present in the area. After topographic …
Heat-Flow Anomaly in Lesotho - Implications for the Southern Boundary of the Kaapvaal Craton
Heat flow studies in southern Africa reveal a pattern of low heat flow in Archean cratons compared with Proterozoic mobile belts that provides grounds for modelling in which cratons have lower mantle heat flux and greater lithospheric thickness. There is little detailed information regarding thermal transitions across craton boundaries but new data from Lesotho provide insights into the nature of the boundary between the Kaapvaal craton and the Natal belt. Measurements at nine localities in a 90-km-long north-south traverse show an increase of heat flow from typically cratonic values of about 45 MW m-2 in the north to about 80 …
Heat flow in the sediments of lake rotorua
A total of 48 heat flow measurements were made in the sediments at the bottom of Lake Rotorua during June 1990. High heat flows (greater than 0.25 W/m2) were measured in the south-eastern part of the lake, and the total natural heat output for this area is estimated to be 20 MW. Within this area there are two regions with heat flow greater than 2 W/m2; one immediately north of Rotorua, and the other located between Mokoia Island and Rotokawa. The former marks the northward extension of the Rotorua geothermal field beneath the lake. The latter probably represents a separate …
Influence of terrain on bedrock temperatures
Heat flow and temperature field in Zhejiang Province
Heat flow in the south of the Nova-Canton Trough, central equatorial Pacific (GH82-4 Area)
Geothermal measuremetns: thermal evolution of the Japan Sea basins and sediments
Heat flow, thermal structure and thermal evolution of the Paraná basin, Southern Brazil
Groundwater flow and heat flow in an area of mineral springs
As part of the project Géologic Profonde de la France, two boreholes have been drilled in the active hydrothermal area of Chassole, an area of metamorphic Variscan basement characterized by the occurrence of sodium-bicarbonate waters that have undergone high temperatures during their underground cycle. The underground water flow system, as revealed from various hydraulic and chemical observations, appears very complex: it is characterized by the simultaneous presence of meteoric water flowing downwards and mineralized water of deep origin flowing upwards. Geothermal measurements performed in the borehole are presented in detail and a semi-quantitative interpretation is given. A vertical profile of …
Thermal State of the Queen Charlotte Basin, British Columbia: Warm
Thermal regime and hydrodynamics in Tunisia and Algeria
The thermal regime of Algeria and Tunisia and its relation to hydrodynamics is studied by means of available geological and geothermal, and petroleum data. Heat flow densities in the area range from 60 mWm (super -2) to 141 mWm (super -2) . Several Paleozoic to Tertiary aquifers have been identified, together with potential recharge and discharge areas. The area is a transition zone between the African and European plates. The more tectonically active northern Alpine domain does not exhibit an obvious geothermal trend, and high heat flow anomalies that occur there may be related to structure rather than hydrodynamics. The …