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Heat flow in the upper-silesian coal basin: Re-evaluation of data with special attention to the lithology

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Рaŭон Верхне-Сuлезuŭского угольного бaссеŭнa хaрaкmерuзуеmся nовыщеннымu велuчuнaмu mеnлового nоmокa (оm 60 ¶rt;о 120 мВm.м−2 nрu сре¶rt;нем 82±16 мВm. м−2), коmорым не было ¶rt;aно ¶rtолжного объясненuя. В эmоŭ связu былu nересмоmрены все рaнее оnублuковaнные ¶rt;aнные mеnлового nоmокa (n=37) ¶rt;ля ¶rt;aнного регuонa. Особое внuмa≉е у¶rt;елено ¶rt;еmaльному aнaлuзу лumологuu рaзрезa u ролu mеnлоnро⇑о¶rt;носmu in situ ¶rt;ля кaж¶rt;ого muna nоро¶rt;ы. Ъылa оцененa mеnлоnрово¶rt;носmь угольных mолЪ, a maкж, a maкже uссле¶rt;овaлaсь ее связь с рaсnре¶rt;еленuем mемnерamуры nоглубuе. Исnользовaнuе nолученных резулыmamов ¶rt;ля оnuсaнuя mеnлоnрово¶rt;носmu всеŭ вскрыmоŭ буренuем чaсmu рaзрезa nозволuно зaмеmно снuзumь сре¶rt;нuŭ mеnловоŭ nоmок ¶rt;о 70±8 мВm.м−2. Полученнaя велuчuнa вnолне оmвечaеm mекmонuческому режuму северноŭ чaсmu Кaрnamского крaевого nрогuбa. Некоmорое увелuченuегеоmермuческоŭ aкmuвносmu nо срaвненuю с mеnловым nолем nрuлaгaющеоŭ чaсmu Чещского мaссuвa сооmвеmсmвуеmглубuнноŭгеобuнaмuческоŭ aкmuвuзaцuu nрu формuровaнuu сuсmемы Зana¶rdt;ных Кaрnam.

Summary

The area of the Upper Silesian Coal Basin was characterized by generally high heat flow ranging from 60 to 120 mWm−2, mean 82±16 mWm−2, which has been difficult to explain. Therefore all published data on the heat flow in this region (n=37) were summarized and re-evaluated. Special attention was paid to the detailed assessment of the lithological structure and the contribution of the individual rock types to the characteristic in-situ thermal conductivity. Also the thermal conductivity of the coal bearing layers was estimated and its effect on the temperature-depth distribution was investigated. The application of the data obtained for the representative thermal conductivity profiles of the whole drilled section considerably reduced the mean heat flow to 70±8 mWm−2. The latter value is fully compatible with the tectonic structure of the northern part of the Carpathian Frontal Foredeep. Slightly increased geothermal activity compared with the heat flow field of the adjacent part of the Bohemian Massif corresponds to certain deep geological rejuvenation during the creation of the Western Carpathians.

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Authors and Affiliations

  1. Geophysical Institute, Czechosl. Acad. Sci., Prague

    Jaroslav Kubík & Vladimír Čermák

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  1. Jaroslav Kubík
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  2. Vladimír Čermák
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Kubík, J., Čermák, V. Heat flow in the upper-silesian coal basin: Re-evaluation of data with special attention to the lithology. Stud Geophys Geod 30, 376–393 (1986). https://doi.org/10.1007/BF01646381

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