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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 custom-type="pmi" pub-id-type="custom">pmi-11168</article-id>
      <article-id pub-id-type="uri">https://pmi.spmi.ru/pmi/article/view/11168</article-id>
      <article-categories>
        <subj-group subj-group-type="section-heading" xml:lang="ru">
          <subject>Без раздела</subject>
        </subj-group>
        <subj-group subj-group-type="section-heading" xml:lang="en">
          <subject>Without section</subject>
        </subj-group>
      </article-categories>
      <title-group>
        <article-title xml:lang="en">Determination of average contents of chemical elements in rocks and ores</article-title>
        <trans-title-group xml:lang="ru">
          <trans-title>К определению средних содержаний химических элементов в горных породах и рудах</trans-title>
        </trans-title-group>
      </title-group>
      <contrib-group>
        <contrib contrib-type="author" corresp="yes">
          <name name-style="eastern">
            <surname>Kvyatkovsky</surname>
            <given-names>E. M.</given-names>
          </name>
          <name-alternatives>
            <name name-style="eastern" xml:lang="ru">
              <surname>Квятковский</surname>
              <given-names>Е. М.</given-names>
            </name>
            <name name-style="western" xml:lang="en">
              <surname>Kvyatkovsky</surname>
              <given-names>E. M.</given-names>
            </name>
          </name-alternatives>
          <email>pmi@spmi.ru</email>
          <xref ref-type="aff" rid="aff1"/>
        </contrib>
        <aff-alternatives id="aff1">
          <aff>
            <institution xml:lang="ru"> (Россия)</institution>
          </aff>
          <aff>
            <institution xml:lang="en"> (Russia)</institution>
          </aff>
        </aff-alternatives>
      </contrib-group>
      <pub-date pub-type="epub" iso-8601-date="1978-03-01">
        <day>01</day>
        <month>03</month>
        <year>1978</year>
      </pub-date>
      <pub-date date-type="collection">
        <year>1978</year>
      </pub-date>
      <volume>76</volume>
      <fpage>82</fpage>
      <lpage>85</lpage>
      <history>
        <date date-type="received" iso-8601-date="1977-09-05">
          <day>05</day>
          <month>09</month>
          <year>1977</year>
        </date>
        <date date-type="accepted" iso-8601-date="1977-11-30">
          <day>30</day>
          <month>11</month>
          <year>1977</year>
        </date>
        <date date-type="rev-recd" iso-8601-date="1978-03-01">
          <day>01</day>
          <month>03</month>
          <year>1978</year>
        </date>
      </history>
      <permissions>
        <copyright-statement xml:lang="ru">© 1978 Е. М. Квятковский</copyright-statement>
        <copyright-statement xml:lang="en">© 1978 E. M. Kvyatkovsky</copyright-statement>
        <copyright-year>1978</copyright-year>
        <copyright-holder xml:lang="ru">Е. М. Квятковский</copyright-holder>
        <copyright-holder xml:lang="en">E. M. Kvyatkovsky</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/11168">https://pmi.spmi.ru/pmi/article/view/11168</self-uri>
      <abstract xml:lang="ru">
        <p>При геохимических исследованиях для характеристики горных пород и руд используют два основных параметра - среднее содержание и дисперсию. Легко показать, что независимо от характера пространственного распределения со­держаний элемента в изучаемом объекте при достаточно густой и равномерной сети опробования среднее содержание элемента равно среднему арифметиче­скому ...</p>
      </abstract>
      <abstract xml:lang="en">
        <p>In geochemical studies, two basic parameters, mean grade and variance, are used to characterize rocks and ores. It is easy to show that regardless of the nature of the spatial distribution of element content in the studied object at a sufficiently dense and uniform sampling network, the average content of the element is equal to the arithmetic mean ...</p>
      </abstract>
    </article-meta>
  </front>
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