Heat flow and near-surface radioactivity in the Australian continental crust

1976 ◽  
Author(s):  
J.H. Sass ◽  
J.C. Jaeger ◽  
Robert J. Munroe
Keyword(s):  
Heat Flow ◽  
Continental Crust ◽  
Near Surface

scholarly journals Estimation of Curie-point depths, geothermal gradients and near-surface heat flow from spectral analysis of aeromagnetic data in the Loum – Minta area (Centre-East Cameroon)

2018 ◽  
Vol 27 (4) ◽  
pp. 1291-1299
Author(s):  
Jean Aimé Mono ◽  
Théophile Ndougsa-Mbarga ◽  
Yara Tarek ◽  
Jean Daniel Ngoh ◽  
Olivier Ulrich Igor Owono Amougou
Keyword(s):  
Spectral Analysis ◽  
Heat Flow ◽  
Curie Point ◽  
Surface Heat ◽  
Aeromagnetic Data ◽  
Near Surface ◽  
Geothermal Gradients ◽  
Surface Heat Flow

Vertical variation of heat flow density in the continental crust

Terra Nova ◽  
1993 ◽  
Vol 5 (4) ◽  
pp. 389-398 ◽  
Author(s):  
I.T. Kukkonen ◽  
V. Čermák ◽  
E. Hurtig
Keyword(s):  
Heat Flow ◽  
Continental Crust ◽  
Flow Density ◽  
Heat Flow Density ◽  
Vertical Variation

scholarly journals Borehole temperatures at the Colle Gnifetti core-drilling site (Monte Rosa, Swiss Alps)

1991 ◽  
Vol 37 (125) ◽  
pp. 37-46 ◽  
Author(s):  
Wilfried Haeberli ◽  
Martin Funk
Keyword(s):  
Heat Flow ◽  
20Th Century ◽  
Swiss Alps ◽  
Model Calculations ◽  
Near Surface ◽  
Core Drilling ◽  
Air Temperatures ◽  
Dependent Model ◽  
Drilling Site ◽  
Monte Rosa

Abstract Measured englacial temperatures at the Colle Gnifetti core-drilling site are presented and compared with model calculations concerning possible effects of 20th century warming. The firn/ice saddle at the 124 m deep saddle borehole is cold throughout with a mean annual surface temperature near –14°C and a basal temperature slightly below –12°C. Influence of refreezing meltwater is weak and limited to near-surface formation of ice layers (recrystallization-infiltration). Temperature gradients in the saddle borehole are positive and increase from 0.015° to 0.019°C m−1 between 30 m depth and bedrock, corresponding to a mean vertical heat flow of around 50mWm−2. The observed temperature profile is close to steady-state conditions. It can well be reproduced with time-dependent model calculations using mean annual air temperatures from the nearby weather station of Grand St. Bernard within the main chain of the Swiss Alps, but it significantly deviates from similar calculations based on Säntis data, reflecting developments of air temperatures on the northern slope of the Alps. 20th century warming of cold Alpine firn seems to be much less pronounced than in polar areas, where strong heat-flow anomalies are commonly observed.

HEAT FLOW DETERMINATIONS IN THE CANADIAN ARCTIC ARCHIPELAGO

1965 ◽  
Vol 2 (2) ◽  
pp. 59-71 ◽  
Author(s):  
L. K. Law ◽  
W. S. B. Paterson ◽  
K. Whitham
Keyword(s):  
Heat Flow ◽  
Late Quaternary ◽  
Canadian Arctic ◽  
The Arctic ◽  
Northwestern Part ◽  
Thermal Probe ◽  
Portable Equipment ◽  
Weighted Mean ◽  
Near Surface ◽  
Made In

Three heat flow determinations a were made in M'Clure Strait between Prince Patrick and Banks Islands in the northwestern part of the Arctic Archipelago of Canada. The three stations lie within 55 km of a point some 130 km SSW. of Mould Bay, Prince Patrick Island, and yield a weighted mean heat flow of 0.84 ± 0.09 μcal cm−2 s−1, or 57% only of the worldwide continental average. The measurements were made from sea ice in water depths of some 430 m using a thermal probe and portable equipment carried in a fixed-wing aircraft.Instrumental limitations and errors are discussed, together with environmental factors. The uncertainties in interpreting this result as a truly subnormal equilibrium heat flow are outlined but it is concluded that the calculated systematic errors are unlikely to exceed 25%. Consequently in the absence of any known major perturbing effect, it must be concluded that the structure responsible for the suppression of vertical magnetic held variations at Mould Bay observatory does not extend 130 km to the south, is not produced by an anomalously high near-surface temperature, or is of late-Quaternary origin.

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