References
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Catalogue of Heat Flow Density Data: Switzerland
Subsurface temperatures in the northern Great Plains
Geothermal resources within the Great Plains occur as strata-bound waters in regional aquifers. Generally, all aquifers in the Great Plains including and underlying the Inyan Kara and Newcastle Formations of the Dakota Group (Cretaceous) contain waters warm enough for development as geothermal resources (Table 1). Many of these aquifers occur throughout the Great Plains, but the formation names may differ across the province. The Dakota aquifers are the most extensive and the best mapped in the subsurface; thus, a contour map of temperatures on top of the Dakota Group provides a large-scale view of the minimum geothermal potential of the …
Stratabound geothermal resources in North Dakota and South Dakota
Catalogue of Heat Flow Density Data: Bulgaria
Rifting in the Northern Norwegian-Greenland Sea - Thermal Tests of Asymmetric Spreading
The analysis of heat flow, seismic, and topographic data collected in the northern Norwegian-Greenland Sea reveals an asymmetric evolution of the Eurasian and North American plates. These data are compared to predictions from three kinematic models of extension which produce asymmetry about the Knipovich Ridge: (1) uniform asymmetric pure shear, (2) lithospheric simple shear, and (3) rift/ridge jumping. The data are consistent with a range of deformation scenarios, from one ridge jump occurring at about 25 m.y. after the initiation of spreading to continuous asymmetric extension. The simple shear model can match the data only when a detachment fault dips …
A NEW GLOBAL HEAT FLOW COMPILATION
Catalogue of Heat Flow Density Data: Turkey
Terrestrial heat flow in Canada
The first heat-flow data in Canada were published in 1951 (Misener and others). This was twelve years after the earliest publication of completely measured heat flow (Bullard, 1939; Benfield, 1939), a period that included the Second World War. Canada was the third country, after the United Kingdom and the United States, to produce heat-flow data, and was followed by Australia, Poland, South Africa, and Iceland.At present, heat-flow values have been published or submitted for publication from 298 sites in Canada, including the continental shelves. A list of these data is to be found in Jessop (1989). A “site” may include …
Report on DELP 1988 cruises in the Okinawa Trough. Part 8: Heat flow measurements
Catalogue of Heat Flow Density Data: Federal Republic of Germany Eastern Federal States (former German Democratic Republic)
Terrestrial Heat Flow and Lithospheric Structure
TERRESTRIAL HEAT FLOW ON THE QING-ZANG PLATEAU AND THE MODELING OF THE TECTONO-THERMAL EVOLUTION OF TERRANES IN ITS SOUTHERN PART
An overview of heat flow in southwestern United States and northern Chihuahua, Mexico
Over the past two decades a great many heat-flow measurements and estimates have been made in the southwestern United States and neighboring areas of northern Chihuahua, Mexico. Although these data have enhanced our understanding of the geothermal regime in the southwestern United States, many questions have developed while analyzing the data. In this chapter we present some of the conclusions that can be made from the heat-flow data in the study areas. In addition, we discuss some of the important unanswered questions concerning the geothermal regime in various geologic provinces of the southwestern United States and northern Chihuahua, Mexico. We …
High Heat-Flow Anomaly around Hatsushima Biological Community in the Western Sagami Bay, Japan
Heat flow values have been determined at sites that are densely distributed around biological communities located along a topographic inflection line to the southeast of Hatsushima Island in the western Sagami Bay through four research cruises since 1988. Anomalously high heat flow values up to 2,000 mW/m2 were observed at the largest community, where a high methane content anomaly had been found indicating fluid venting activity. Within 1 km of the inflection line, which is presumed to be a surface expression of an active fault, heat flow values are high and variable (about 400 mW/m2), whereas they are low and …
Heat-flow patterns of the North American continent; A discussion of the Geothermal Map of North America
The objective in creating a Geothermal Map of North America (Blackwell and Steele, 1991) was to show as accurately and completely as possible the state of knowledge of the geothermal field of the continent in all its variations. As a consequence, the types of information shown are combined in a way that is different from existing maps. The only other continent-wide map representations of aspects of temperature, geothermal gradient, or heat-flow data are the AAPG/USGS Subsurface Temperature Map of North America (1976b) and the Geothermal Gradient Map of North America (1976a) both at a 1:5,000,000 scale.Geothermal gradient maps of the …
Catalogue of Heat Flow Density Data: Poland
Catalogue of Heat Flow Density Data: Italy
Are Granites Representative of Heat Flow Provinces?
The linear relationship between heat flow and heat production has been commonly interpreted in terms of distribution of radioelements with depth. The slope of the relationship (or thermal depth), which also has the dimension of length, needs to be considered in terms of other data constraining the distribution of heat-producing elements with depth. Measurements in deep oreholes or from sampling granitic plutons with respect to elevation fails to represent the assumed models of heat production distribution with depth. No clear trend can be surmised from these data. The enrichment in radioelements which is frequently observed in the uppermost part of …
Heatflow density distribution in the Red Sea
A new heatflow density (HFD) map of the Red Sea was compiled from 467 heatflow density values collected by various organisations during the last 20 years. The map shows that the complicated heatflow distribution can only be explained if we assume considerable convective transport of heat through water circulating in the sediments and crust, as well as convection in small volumes of mobilized magma associated with the deeps along the morphologic depression of the Red Sea. The HFD values are twice as high as the world mean at the flanks of the rift and reach values of 5 to 8 …