GAMMA RAY SPECTROMETRY OF ROCKS FROM A VOLCANIC SEQUENCE PENETRATED BY THE SG-1 BOREHOLE AND THE RADIOGENIC CONTRIBUTION TO THE TOTAL HEAT FLOW
Abstract and keywords
Abstract (English):
Results derived from gamma-ray spectrometry studies of volcanic rocks in a depth interval of 3540-8150m are presented. The rocks are shown to have low concentrations of radioactive elements, which is consistent with the clarke of basic igneous rocks close to calc-alkalic series of present island-arc systems. Potassium is present in all rocks of the volcanic sequence, whereas uranium and thorium are absent in some of its beds. Maximum U and Th concentrations are 4 10-4 % and 6 10-4 %, respectively. The Mesozoic sequence was subdivided into seven groups in accordance with associations of radioactive elements. The distribution of radioactive elements and their associations along the SG-1 section can be accepted as criteria for the differentiation of the volcanic sequence. Estimates of the radiogenic heat generation calculated for rocks of the volcanic sequence point to a considerable contribution of the radiogenic heat to the total heat flow. No proportionality exists between the radiogenic heat generation in the crust and measured heat flow.

Keywords:
Gamma ray, spectrometry of rocks, total heat flow.
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References

1. Abdullaev, Izv. Akad. Nauk Azerb., Ser. Nauk o Zemle, no. 2, 1999.

2. Aliev, Geothermal fields of the South Caspian basin and their implications for oil-and-gas content, 1988.

3. Aliev, The Saatly Overdeep SG-1 Borehole, 2000.

4. Alizade, The Saatly Overdeep SG-1 Borehole, 2000.

5. Glagolev, The Saatly Overdeep SG-1 Borehole, 2000.

6. Nartikoev, ANKh, no. 3, 1985.

7. Smyslov, Uranium and Thorium in the Crust, 1974.

8. Smyslov, The Thermal Regime and Radioactivity of the Earth, 1979.

9. Vinogradov, Geokhimiya, no. 7, 1962.

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