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  <front>
    <journal-meta>
      <journal-id journal-id-type="issn">2411-3336</journal-id>
      <journal-id journal-id-type="eissn">2541-9404</journal-id>
      <journal-title-group>
        <journal-title xml:lang="ru">Записки Горного института</journal-title>
        <journal-title xml:lang="en">Journal of Mining Institute</journal-title>
      </journal-title-group>
      <publisher>
        <publisher-name xml:lang="ru">Санкт-Петербургский горный университет императрицы Екатерины ΙΙ</publisher-name>
        <publisher-name xml:lang="en">Empress Catherine II Saint Petersburg Mining University</publisher-name>
      </publisher>
    </journal-meta>
    <article-meta>
      <article-id pub-id-type="doi">10.31897/pmi.2018.4.347</article-id>
      <article-id custom-type="pmi" pub-id-type="custom">pmi-12316</article-id>
      <article-id pub-id-type="uri">https://pmi.spmi.ru/pmi/article/view/12316</article-id>
      <article-categories>
        <subj-group subj-group-type="section-heading" xml:lang="ru">
          <subject>Геология</subject>
        </subj-group>
        <subj-group subj-group-type="section-heading" xml:lang="en">
          <subject>Geology</subject>
        </subj-group>
      </article-categories>
      <title-group>
        <article-title xml:lang="en">Problem of the international chronostratigraphic chart of lower devonian and stratigraphic boundaries of lower devonian stages in Southern Tian Shan</article-title>
        <trans-title-group xml:lang="ru">
          <trans-title>Проблемы международной стратиграфической шкалы нижнего девона и границы нижнедевонских ярусов в Южном Тянь-Шане</trans-title>
        </trans-title-group>
      </title-group>
      <contrib-group>
        <contrib contrib-type="author" corresp="yes">
          <name name-style="eastern">
            <surname>Mikhailova</surname>
            <given-names>E. D.</given-names>
          </name>
          <name-alternatives>
            <name name-style="eastern" xml:lang="ru">
              <surname>Михайлова</surname>
              <given-names>Е. Д.</given-names>
            </name>
            <name name-style="western" xml:lang="en">
              <surname>Mikhailova</surname>
              <given-names>E. D.</given-names>
            </name>
          </name-alternatives>
          <email>edmich@spmi.ru</email>
          <xref ref-type="aff" rid="aff1"/>
        </contrib>
        <aff-alternatives id="aff1">
          <aff>
            <institution xml:lang="ru">Санкт-Петербургский горный университет (Санкт-Петербург, Россия)</institution>
          </aff>
          <aff>
            <institution xml:lang="en">Saint-Petersburg Mining University (Saint-Petersburg, Russia)</institution>
          </aff>
        </aff-alternatives>
        <contrib contrib-type="author">
          <name name-style="eastern">
            <surname>Kim</surname>
            <given-names>A. I.</given-names>
          </name>
          <name-alternatives>
            <name name-style="eastern" xml:lang="ru">
              <surname>Ким</surname>
              <given-names>А. И.</given-names>
            </name>
            <name name-style="western" xml:lang="en">
              <surname>Kim</surname>
              <given-names>A. I.</given-names>
            </name>
          </name-alternatives>
          <email>alekskim@ars.uz</email>
          <xref ref-type="aff" rid="aff2"/>
        </contrib>
        <aff-alternatives id="aff2">
          <aff>
            <institution xml:lang="ru">Восточно-Узбекская геолого-съемочная экспедиция (пос. Ишонгузар, Ташкентская обл., Узбекистан)</institution>
          </aff>
          <aff>
            <institution xml:lang="en">East Uzbekistan Geological Surveying and Search Expedition (Eshanguzar, Tashkent Region, Uzbekistan)</institution>
          </aff>
        </aff-alternatives>
      </contrib-group>
      <pub-date pub-type="epub" iso-8601-date="2018-08-24">
        <day>24</day>
        <month>08</month>
        <year>2018</year>
      </pub-date>
      <pub-date date-type="collection">
        <year>2018</year>
      </pub-date>
      <volume>232</volume>
      <fpage>347</fpage>
      <lpage>356</lpage>
      <history>
        <date date-type="received" iso-8601-date="2018-03-02">
          <day>02</day>
          <month>03</month>
          <year>2018</year>
        </date>
        <date date-type="accepted" iso-8601-date="2018-05-03">
          <day>03</day>
          <month>05</month>
          <year>2018</year>
        </date>
        <date date-type="rev-recd" iso-8601-date="2018-08-24">
          <day>24</day>
          <month>08</month>
          <year>2018</year>
        </date>
      </history>
      <permissions>
        <copyright-statement xml:lang="ru">© 2018 Е. Д. Михайлова, А. И. Ким</copyright-statement>
        <copyright-statement xml:lang="en">© 2018 E. D. Mikhailova, A. I. Kim</copyright-statement>
        <copyright-year>2018</copyright-year>
        <copyright-holder xml:lang="ru">Е. Д. Михайлова, А. И. Ким</copyright-holder>
        <copyright-holder xml:lang="en">E. D. Mikhailova, A. I. Kim</copyright-holder>
        <license license-type="open-access" xlink:href="http://creativecommons.org/licenses/by/4.0" xml:lang="ru">
          <license-p>Эта статья доступна по лицензии Creative Commons Attribution 4.0 International (CC BY 4.0)</license-p>
        </license>
        <license license-type="open-access" xlink:href="http://creativecommons.org/licenses/by/4.0" xml:lang="en">
          <license-p>This article is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0)</license-p>
        </license>
      </permissions>
      <self-uri xlink:type="simple" xlink:href="https://pmi.spmi.ru/pmi/article/view/12316">https://pmi.spmi.ru/pmi/article/view/12316</self-uri>
      <abstract xml:lang="ru">
        <p>Ярусные подразделения Международной стратиграфической шкалы (МСШ) связаны с естественно историческими этапами развития Земли, а их границы обычно устанавливаются по узнаваемому в большинстве регионов мира палеогеографическому или палеобиологическому событию. Исследования по стандартизации объемов ярусов нижнего девона МСШ длятся уже более 70 лет. Первыми используемыми ярусами являлись жедин, зиген и эмс, но их объемы не были точно определены. В статье приведена история установления используемых в настоящее время лохковского, пражского и эмсского ярусов. При распознавании отложений нижнедевонских ярусов основным методом является биостратиграфический, основанный на использовании архистратиграфических пелагических фоссилий – выявлении в изучаемых толщах зональной последовательности по остаткам конодонтов, дакриоконарид и гониатитов и сравнения их со стандартной последовательностью, принятой Международным геологическим конгрессом (МГК). Статья содержит анализ дискуссируемых проблем, связанных с определением положения глобальных стратотипов основания (GSSP) ярусов нижнего девона. Приведены сведения об использовании магнитостратиграфического метода при сопоставлении разрезов эмсского яруса в Баррандиене и Зеравшанском хребте. Охарактеризованы региональные стратоны нижнего девона Зеравшано-Гиссарской и Туркестано-Алайской горных областей Южного Тянь-Шаня. Показано, что присутствующие в этих областях зональные последовательности по конодонтам и дакриоконаридам почти полностью совпадают со стандартными последовательностями, принятыми для нижнего девона в Международной стратиграфической шкале. Приведена характеристика зон и объемов бурсыхирманского, сангитоварского, хукарского, кунжакского и китабского горизонтов.</p>
      </abstract>
      <abstract xml:lang="en">
        <p>The boundaries of the International Chronostratigraphic Chart (ICC) are associated with the natural historical stages of the Earth's development, and their boundaries are usually determined by the palaeogeographical or palaeobiological event that is recognized in most regions of the world. Studies on the standardization of the Lower Devonian ICC stages duration have lasted more than 70 years. The first stages were Gedinnian, Siegenian and Emsian, but their duration was not accurately determined. The article shows the history of the establishment of the currently used Lochkovian, Pragian and Emsian stages. The key study method of the Lower Devonian stages deposits is biostratigraphic one, based on the use of archistratigraphic pelagic fossils, i.e. revealing of the zonal sequence over the conodonts, dacrioconarids and goniatites fossils and comparing them with the standard sequence adopted by the International Geological Congress (IGC). The article contains an analysis of the discussed problems related to the determination of the position of the global boundary stratotype section and point (GSSP) of the Lower Devonian stages. The use of the magnetostratigraphic method in comparison of the sections of the Emsian stage in Barrandian and Zarafshan range is also discussed. The Lower Devonian regional strata of the Zarafshan-Gissar and Turkestan-Altay mountain regions of the Southern Tian Shan are characterized. It is shown that the zonal sequences on conodonts and dacrioconarids presented in these regions almost completely coincide with the standard Lower Devonian sequences in the International Chronostratigraphic Chart. The characteristics of zones and volume of Bursykhirmanian, Sangitovarian, Khukarian, Kunjak, and Kitab horizons are given.</p>
      </abstract>
      <kwd-group xml:lang="ru">
        <title>Ключевые слова</title>
        <kwd>лохковский</kwd>
        <kwd>пражский</kwd>
        <kwd>эмсский ярусы</kwd>
        <kwd>глобальный стратотипический разрез и точка</kwd>
        <kwd>сангитоварский</kwd>
        <kwd>хукарский</kwd>
        <kwd>кунжакский</kwd>
        <kwd>китабский горизонты</kwd>
      </kwd-group>
      <kwd-group xml:lang="en">
        <title>Keywords</title>
        <kwd>Lochkovian</kwd>
        <kwd>Pragian</kwd>
        <kwd>Emsian stages</kwd>
        <kwd>Global Boundary Stratotype Section and Point</kwd>
        <kwd>Sangitovarian</kwd>
        <kwd>Khukarian</kwd>
        <kwd>Kunjak</kwd>
        <kwd>Kitab horizons</kwd>
      </kwd-group>
      <funding-group>
        <funding-statement xml:lang="ru">The work was carried out within the framework of the International Project IGCP 591 – The Early to Middle Palaeozoic Revolution of the International Geological Correlation Program (IGCP), which is jointly controlled by UNESCO and the International Union of Geological Sciences (IUGS).</funding-statement>
        <funding-statement xml:lang="en">The work was carried out within the framework of the International Project IGCP 591 – The Early to Middle Palaeozoic Revolution of the International Geological Correlation Program (IGCP), which is jointly controlled by UNESCO and the International Union of Geological Sciences (IUGS).</funding-statement>
      </funding-group>
    </article-meta>
  </front>
  <body/>
  <back>
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