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.
unpublished data
Geothermal Map of North America
Component parts of the World Heat Flow Data Collection
Present-day heat flow, thermal history and tectonic subsidence of the East China Sea Basin
The East China Sea Basin is located in the convergence area between the Eurasian plate, the Pacific plate and the Philippine Sea plate, and consists of two depressions. the Taibei Depression in the west and the Xihu Depression in the east. Heat flow measurements show that the East China Sea Basin is characterized by present-day heat flow around 70.6 mW/m(2), varying between 55 and 88 mW/m(2). No significant difference in heat flow is observed between the Xihu and the Taibei Depressions. Thermal history reconstruction using vitrinite reflectance suggests that the thermal history was, however, different in the Taibei and the …
High-resolution heat flow density in the lower Congo basin
Heat flow density (HFD) has been derived in the lower Congo basin from 293 conventional probe measurements, 424 oil exploration data, and about 1,000,000 Bottom Simulating Reflector (BSR) values. Each set of data provides independent estimates of temperature gradients associated with specific uncertainties and geographic distributions, but a statistical comparison in overlapping domains shows a relatively good consistency. In situ conductivity has been measured in conventional surveys and estimated from rock composition and porosity in oil exploration boreholes: in the deep offshore, measurements and estimates are consistently low and increase significantly toward the shelf domain. Thermal conductivity does not change …
personal communication
Absence of a regional surface thermal high in the Baikal rift - new insights from detailed contouring of heat flow anomalies
Heat flow in active tectonic zones as the Baikal rift is a crucial parameter for evaluating deep anomalous structures and lithosphere evolution. Based on the interpretation of the existing datasets, the Baikal rift has been characterized in the past by either high heat flow, or moderately elevated heat flow, or even lacking a surface heat flow anomaly. We made an attempt to better constrain the geothermal picture by a detailed offshore contouring survey of known anomalies, and to estimate the importance of observed heat flow anomalies within the regional surface heat output. A total of about 200 new and close-spaced …
Subsurface heat flow in an urban environment
The subsurface temperature field beneath Winnipeg, Canada, is significantly different from that of the surrounding rural areas. Downward heat flow to depths as great as 130 m has been noted in some areas beneath the city and groundwater temperatures in a regional aquifer have risen by as much as 5degreesC in some areas. Numerical simulation of heat transport supports the conjecture that these temperature changes can be largely attributed to heat loss from buildings and the temperature at any given point is sensitive to the distance from and the age of any buildings. The effect is most noticable when buildings …
Dynamics of gas hydrate: case of the Congo continental slope
A numerical model is developed to study the temperature effect on stability and phase transformation of gas-hydrate. The model uses a mathematical formulation based on the enthalpy form of the conservation law of energy. The use of the enthalpy form instead of the temperature form as often done in the literature has made the problem numerically simpler. The model is then applied to describe the effect of sea bottom temperature variations on the stability of gas hydrate occurrences and on the seafloor reflectivity in sediments of the Congo continental slope. Indeed, a migrating seafloor reflectivity front is observed on 3D …
Heat flow in the Nipigon arm of the Keweenawan rift, northwestern Ontario, Canada
In the Archean Superior Province, the Nipigon Embayment, in the area of Lake Nipigon north of Lake Superior, is covered by MidProterozoic sediments intruded by Keweenawan diabase sills. It has been interpreted as a failed arm of the ca. 1100 Ma Keweenawan rift. Six new heat flow values in this area show that the region of low heat flow associated with the Keweenawan rift in Lake Superior extends northwards along the western margin of the Nipigon Embayment. The average heat flow in the Nipigon area (39 +/- 5 mWm(-2)) is only slightly lower than that of the adjacent western Superior …
Geotermichesky atlas Ukrainy (Geothermal Atlas of Ukraine )
personal communication, In: CD Rom: Geothermal Gradient and Heat Flow Data in and, around Japan. Geological Survey of Japan, AIST, 2004
Re-evaluation of heat flow data near Parkfield, CA: Evidence for a weak San Andreas Fault
Improved interpretations of the strength of the San Andreas Fault near Parkfield, CA based on thermal data require quantification of processes causing significant scatter and uncertainty in existing heat flow data. These effects include topographic refraction, heat advection by topographically-driven groundwater flow, and uncertainty in thermal conductivity. Here, we re-evaluate the heat flow data in this area by correcting for full 3-D terrain effects. We then investigate the potential role of groundwater flow in redistributing fault-generated heat, using numerical models of coupled heat and fluid flow for a wide range of hydrologic scenarios. We find that a large degree of …
Results of the 42nd cruise of R/V "Dmitryi Mendeleev" in 1988 (personal communication)
High resolution temperature measurements in the borehole Yaxcopoil-1, Mexico
Within the frame of the International Continental Deep Drilling Program (ICDP) and as a part of the Chicxulub Scientific Drilling Project (CSDP), high resolution temperature measurements were performed in the borehole Yaxcopoil-1 (Yax-1). The temperature was logged to the depth of 858 in seven times between March 6-19, 2002, starting 10 days after the hole was shut in and mud circulation ceased. Successive logs revealed only small temperature variations in time and space, indicating a fast temperature recovery to almost undisturbed conditions prior to the first log. From these logs, a mean temperature gradient of similar to37 mK/m was determined …
Characteristic of geotherm-geopressure system in Erlian Basin
Conductive heat flow variations from bottom-simulating reflectors on the Hikurangi margin, New Zealand
(1) Bottom simulating reflectors (BSRs) represent the base of a gas hydrate zone underlain by widespread free gas. The extent of BSRs (> 40,000 km(2)) has been mapped on the continental slope of the Hikurangi margin using industry and research seismic data. A conductive model was used to calculate heat flow from the depth of the BSR to the surface. A regional trend is observed, in which heat flow, uncorrected for sedimentation effects, decreases from an average of similar to 50 mW m(-2) at the toe of the accretionary prism to similar to35 mW m(-2) at a distance 100 km …
Geothermal regime in the Qaidam basin, northeast Qinghai–Tibet Plateau
The thermal properties of rocks in the upper crust of the Qaidam basin are given based on measurements of 98 thermal conductivities and 50 heat production values. Nineteen new measured heat flow data were obtained from thermal conductivity data and systematic steady-state temperature data. This paper contributes 28 calculated heat flow values for the basin for the first time. Examination of 47 heat flow values, ranging from 31.3 to 70.4 mW/m(2) with an average value of 52.6 +/- 9.6 mW/m(2), gives the heat flow distribution character of the basin: high heat flows over 60 mW/m(2) are distributed in the western …
New heat flow data from the immediate vicinity of the Kola superdeep borehole
Atypical heat-flow near gas hydrate irregularities and cold seeps in the Baikal Rift Zone
In this paper, we address the irregular behaviour and geometry of the gas hydrate stability zone (HSZ) inferred from reflection seismic data in relation to heat-flow measurements. The study area lies in the hanging wall of the Posolsky fault in the Southern Baikal Basin (SBB). Side-scan sonar imagery already revealed an undulating antithetic active fault structure and several isolated active vent structures. Remarkably, these fluid discharge structures occur only where the base of the hydrate stability zone (BHSZ), as inferred from seismic reflection profiles, is fluctuating and discontinuous, independent of lake floor morphology. The correlation between the interpreted BHSZ and …