scholarly journals Analysis and Mapping of an Updated Terrestrial Heat Flow Data Set

2019 ◽  
Vol 20 (8) ◽  
pp. 4001-4024 ◽  
Author(s):  
F. Lucazeau
Keyword(s):  
Heat Flow ◽  
Flow Data ◽  
Data Set ◽  
Terrestrial Heat Flow

scholarly journals A new database structure for the IHFC Global Heat Flow Database

2021 ◽  
Vol 4 (1) ◽  
pp. 1-14
Author(s):  
Sven Fuchs ◽  
Graeme Beardsmore ◽  
Paolo Chiozzi ◽  
Orlando Miguel Espinoza-Ojeda ◽  
Gianluca Gola ◽  
...  
Keyword(s):  
Heat Flow ◽  
International Association ◽  
Open Data ◽  
Flow Data ◽  
Ocean Drilling Program ◽  
Data Set ◽  
Data Services ◽  
External Data ◽  
Database Structure ◽  
Starting Point

Periodic revisions of the Global Heat Flow Database (GHFD) take place under the auspices of the International Heat Flow Commission (IHFC) of the International Association of Seismology and Physics of the Earth's Interior (IASPEI). A growing number of heat-flow values, advances in scientific methods, digitization, and improvements in database technologies all warrant a revision of the structure of the GHFD that was last amended in 1976. We present a new structure for the GHFD, which will provide a basis for a reassessment and revision of the existing global heat-flow data set. The database fields within the new structure are described in detail to ensure a common understanding of the respective database entries. The new structure of the database takes advantage of today's possibilities for data management. It supports FAIR and open data principles, including interoperability with external data services, and links to DOI and IGSN numbers and other data resources (e.g., world geological map, world stratigraphic system, and International Ocean Drilling Program data). Aligned with this publication, a restructured version of the existing database is published, which provides a starting point for the upcoming collaborative process of data screening, quality control and revision. In parallel, the IHFC will work on criteria for a new quality scheme that will allow future users of the database to evaluate the quality of the collated heat-flow data based on specific criteria.

scholarly journals Adjoint inversion of the thermal structure of Southeastern Australia

2019 ◽  
Vol 219 (3) ◽  
pp. 1648-1659 ◽  
Author(s):  
B Mather ◽  
L Moresi ◽  
P Rayner
Keyword(s):  
Thermal Properties ◽  
Heat Flow ◽  
Heat Production ◽  
Thermal Structure ◽  
Surface Heat ◽  
Flow Data ◽  
Data Set ◽  
Surface Heat Flow ◽  
Southeastern Australia ◽  
Curie Depth

SUMMARY The variation of temperature in the crust is difficult to quantify due to the sparsity of surface heat flow observations and lack of measurements on the thermal properties of rocks at depth. We examine the degree to which the thermal structure of the crust can be constrained from the Curie depth and surface heat flow data in Southeastern Australia. We cast the inverse problem of heat conduction within a Bayesian framework and derive its adjoint so that we can efficiently find the optimal model that best reproduces the data and prior information on the thermal properties of the crust. Efficiency gains obtained from the adjoint method facilitate a detailed exploration of thermal structure in SE Australia, where we predict high temperatures within Precambrian rocks of 650 °C due to relatively high rates of heat production (0.9–1.4 μW m−3). In contrast, temperatures within dominantly Phanerozoic crust reach only 520 °C at the Moho due to the low rates of heat production in Cambrian mafic volcanics. A combination of the Curie depth and heat flow data is required to constrain the uncertainty of lower crustal temperatures to ±73 °C. We also show that parts of the crust are unconstrained if either data set is omitted from the inversion.

Terrestrial heat flow at Eldorado, Saskatchewan

1969 ◽  
Vol 6 (5) ◽  
pp. 1191-1197 ◽  
Author(s):  
Trevor Lewis
Keyword(s):  
Heat Flow ◽  
Climatic Changes ◽  
Two Dimensional ◽  
Conductivity Model ◽  
Terrestrial Heat Flow

A heat flow of 1.2 ±.1 μcal cm−2s−1 has been measured in a mine at Eldorado, Saskatchewan. The uncertainties in the correction to this value for climatic changes caused by the most recent glaciation are a minimum at the depth at which this measurement was made. A terrestrial heat flow value, representative of the area, was obtained by using a two-dimensional conductivity model of the mine; this value is 1.3 ±.1 μcal cm−2s−1.

Terrestrial heat flow in Canada

1984 ◽  
Vol 103 (1-4) ◽  
pp. 239-261 ◽  
Author(s):  
A.M. Jessop ◽  
T.J. Lewis ◽  
A.S. Judge ◽  
A.E. Taylor ◽  
M.J. Drury
Keyword(s):  
Heat Flow ◽  
Terrestrial Heat Flow
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