References
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Measurements of terrestrial heat flow in Hokkaido (Part 1)
Measurement of in Situ Sediment Conductivity by means of a Bullard-type Probe
The heated-probe method of measuring sediment conductivity has been successfully adapted to making a multipoint determination in situ over the full gradient interval of a heat-flow measurement. A probe 2.3 m long and 1 cm in diameter can complete both the gradient and conductivity measurements in 30 min on the ocean floor. The first two stations show that agreement between the theory of the method and the experimental data is good, and that in situ sediment conductivity at 2.1 × 10−3 cal °C−1 cm−1 s−1 is consistent with representative values obtained by steady state laboratory methods.
Heat flow in the Philippine Sea
The distribution of heat flow in the Philippine Sea is very complicated. Unlike other marginal seas behind island arcs and the Pacific Basin proper in front of arcs, the Philippine Sea has neither uniformly high nor low heat flow but shows numerous adjacent areas of high and low heat flow. Contouring is difficult but the pattern of heat flow distribution is fairly well established in the northwestern Philippine Sea, i. e. the area of the western Shikoku Basin and the Ryukyu Trench and Island Arc. The basin and trench southeast of the Ryukyu (Nansei-Shoto) Arc are characterized by low heat …
Heat flow west of the Juan de Fuca Ridge
Terrestrial heat flow and tectonics of the Cambay Basin, Gujarat State (India)
Heat flow values are presented for four sites in the Cenozoic Cambay Basin, Gujarat State, India, based on temperature measurements to a depth of 1,200 m in seven water filled wells, drilled for oil exploration. Values obtained from oilfields of Kathana, (22° 17'N 72° 48'E) Nawagam (22°50'N 72° 30'E) and Kalol (23° 16'N 72° 30'E), which are situated in different tectonic blocks along the northern part of the basin are varying and high (1.8 – 2.2 μcal / cm2 ·sec). These heat flow measurements support the previously determined high heat flow (2.3) at Cambay gas field (22° 23'N 72° 35'E). …
Bericht über geothermische Messungen in der Bohrung Heuchelberg 1
Geothermal heat flow in the North Island of New Zealand
Zemnoy teplovoy potok dlya SSSR i yego svyaz' s drugimi geoyavleniyami (Terrestrial heat flow for the USSR and its connection with other geophenomena)
Heat flow measurements on the southeast coast of Australia
Distribution of thorium, uranium, and potassium in igneous rocks of the Boulder batholith region, Montana, and its bearing on radiogenic heat production and heat flow
Izmereniye teplovogo potoka cherez dno Severnogo Ledovitogo okeana v rayone sredinnogo khrebta Khakel' (Measurement of heat flow across the Arctic Ocean floor in the vicinity of the median Hackel Ridge)
Terrestrial heat flow in various parts of India
Results of heat flow studies made in different parts of India including Kolar Gold Field, Cuddapah basin, Singhbhum thrust zone, Aravalli mountain system of Precambrian age, Godavary valley of Mesozoic age and Cambay basin of Cenozoic age are discussed. Heat flow has been found to be low in the southern part of the Preambrian shield. Relatively higher values have been obtained along the northeastern (Singhbhum) and the northwestern parts of the shield (Aravallies). High heat flow has been found along the southeastern part of the Godavary valley and the Cambay basin. The correlation of heat flow with geology and tectonic …
Heat flow in the Arctic
Mid-Atlantic Ridge near 43°N latitude
The results of a reconnaissance bathymetric and magnetic survey of the mid-Atlantic ridge between 42° and 45°N latitude show a symmetrical north-south magnetic pattern parallel to the axis over the two southernmost of six profiles across the ridge. The southern profiles are also characterized by a well developed central rift valley. The four northern profiles do not contain obvious magnetic symmetry elements and are over a portion of the ridge characterized by rugged topography without a central rift. A detailed survey made over the ridge crest between 42°30? and 43°30?N spanned the region of apparent change. Here a narrow zone …
The Red Sea — A Geophysical Background
The history and evolution of the Red Sea are considered in the light of the continental movement of Africa and Arabia. The relevant palaeomagnetic data pertaining to the latter are summarized. The Red Sea developed in phases, and it is likely that these correspond in time to phases of continental drift. The geophysical data for the Red Sea are summarized in a general résumé and in more detail by considering the Red Sea in three parts, viz. the northern Red Sea (north of 25°N), the central Red Sea (17° to 25°N) and southern Red Sea (south of 17°N). Structural differences …
The Floor of the Mediterranean Sea
Heat-flow determinations in the northwestern United States
Eleven new heat‐flow determinations in the northwestern United States, based on data from twenty‐one drill holes and two mine shafts, together with previously available data, suggest a heat‐flow pattern similar to that observed in the southwestern United States. In particular the high heat flow found in the Basin and Range province, about 2.0 μcal/cm2 sec, is characteristic of the Northern Rocky Mountains province and possibly the Columbia Plateaus as well. This region of high heat flow is referred to in this paper as the Cordilleran thermal anomaly zone. Most of central Wyoming, central Montana, and western Washington may have normal …