RUSSIAN JOURNAL OF EARTH SCIENCES VOL. 4, NO. 3, PAGES 225–231, doi:10.2205/2002ES000091, 2002
Gamma ray spectrometry of rocks from a volcanic sequence penetrated by the SG-1 borehole and the radiogenic contribution to the total heat flowCh. S. Aliev, T. A. Zolotovitskaya, and T. A. Ismailzade Institute of Geology, National Academy of Sciences of Azerbaijan,, Azerbaijan
 Results derived from gamma-ray spectrometry studies of volcanic rocks in a depth interval of 3540-8150 m 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 410-4 % and 610-4 %, 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.
Received 11 June 2002; published 25 June 2002.
Keywords: Gamma ray, spectrometry of rocks, total heat flow.
Citation: Aliev, Ch. S., T. A. Zolotovitskaya, and T. A. Ismailzade (2002), Gamma ray spectrometry of rocks from a volcanic sequence penetrated by the SG-1 borehole and the radiogenic contribution to the total heat flow, Russ. J. Earth Sci., 4, No.3, 225-231, doi:10.2205/2002ES000091.
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