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<article article-type="research-article" dtd-version="1.3" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">litosphere</journal-id><journal-title-group><journal-title xml:lang="ru">Литосфера</journal-title><trans-title-group xml:lang="en"><trans-title>LITHOSPHERE (Russia)</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1681-9004</issn><issn pub-type="epub">2500-302X</issn><publisher><publisher-name>A.N. Zavaritsky Institute of Geology and Geochemistry</publisher-name></publisher></journal-meta><article-meta><article-id custom-type="elpub" pub-id-type="custom">litosphere-906</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>Статьи</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>Articles</subject></subj-group></article-categories><title-group><article-title>Химическое электронно-зондовое датирование минералов-концентраторов радиоактивных элементов: методические аспекты</article-title><trans-title-group xml:lang="en"><trans-title></trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Вотяков</surname><given-names>Сергей Леонидович</given-names></name></name-alternatives><email xlink:type="simple">votyakov@igg.uran.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Хиллер</surname><given-names>Вера Витальевна</given-names></name></name-alternatives><email xlink:type="simple">noemail@neicon.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Щапова</surname><given-names>Юлия Владимировна</given-names></name></name-alternatives><email xlink:type="simple">noemail@neicon.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Поротников</surname><given-names>Алексей Владимирович</given-names></name></name-alternatives><email xlink:type="simple">noemail@neicon.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff xml:lang="ru" id="aff-1"><institution>Институт геологи и геохимии УрО РАН</institution><country>Russian Federation</country></aff><pub-date pub-type="collection"><year>2010</year></pub-date><pub-date pub-type="epub"><day>15</day><month>02</month><year>2019</year></pub-date><volume>0</volume><issue>4</issue><fpage>94</fpage><lpage>115</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Вотяков С.Л., Хиллер В.В., Щапова Ю.В., Поротников А.В., 2019</copyright-statement><copyright-year>2019</copyright-year><copyright-holder xml:lang="ru">Вотяков С.Л., Хиллер В.В., Щапова Ю.В., Поротников А.В.</copyright-holder><copyright-holder xml:lang="en">Вотяков С.Л., Хиллер В.В., Щапова Ю.В., Поротников А.В.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://www.lithosphere.ru/jour/article/view/906">https://www.lithosphere.ru/jour/article/view/906</self-uri><abstract><p>Работа посвящена развитию и совершенствованию методики химического микрозондового датирования минералов-концентраторов радиоактивных элементов - широко известной за рубежом методики CHIME (chemical Th-U-total Pb isochron method). Реализован комплексный подход, включающий решение ряда методических аналитических, математических и кристаллохимических задач. С целью повышения воспроизводимости данных и снижения погрешности определения состава минералов-геохронометров (монацита, уранинита, торита и торианита) рассмотрены методические вопросы проведения их микрозондового анализа (оптимизация времени набора импульсов на аналитических пиках U, Th и Pb, учет поправок на влияние матрицы и др.). На основе вычислительного эксперимента по моделированию поведения временной эволюции модельной статистической U-Th-Pb-системы при варьировании всех ее основных характеристик (начального содержания и соотношения U и Th, их среднеквадратичных отклонений, наличия нерадиогенного и потерь радиогенного Pb - степени конкордантности-дискордантности системы, количества ее статистических реализаций и др.) детально исследована процедура датировки в рамках четырех альтернативных подходов; проанализированы проблемы повышения объективности анализа с возможностью отбраковки недостоверных результатов, сформулированы условия, при которых могут быть получены корректные возрастные определения. Показано, что для корректной датировки необходим комплексный подход, включающий использование нескольких различных методов обсчета, и сравнение получаемых возрастов. Развитые математические подходы для получения, обработки и анализа химических данных использованы при изучении ряда Th-U-минералов (монацитов, уранинитов, торитов и торианитов) из различных геологических объектов Урала и прилегающих территорий: выполнено их элементное картирование, изучен химический состав в выделенных точках, проведены расчеты возрастов. С целью повышения объективности методики изохронного химического датирования и возможности отбраковки недостоверных результатов исследованы кристаллохимические особенности минерала-геохронометра монацита (на примере пробы из гранитных пегматитов Адуйского массива, Средний Урал): выполнен детальный анализ зональности в распределении элементов, рассмотрены схемы гетеровалентного изоморфизма катионов Th и U (чералитовый и хаттонитовый), а также вопросы замкнутости Th-U-Pb-системы минерала.</p></abstract><kwd-group xml:lang="ru"><kwd>монацит</kwd><kwd>уранинит</kwd><kwd>химическое микрозондовое датирование</kwd><kwd>элементное картирование</kwd><kwd>кристаллохимия</kwd><kwd>изоморфизм</kwd><kwd>вычислительный эксперимент</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Корнилов А.Н., Романенко И.М., Филиппов М.Н., Петров Д.Б. 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