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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">geology</journal-id><journal-title-group><journal-title xml:lang="ru">Известия высших учебных заведений. Геология и разведка</journal-title><trans-title-group xml:lang="en"><trans-title>Proceedings of higher educational establishments. Geology and Exploration</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">0016-7762</issn><issn pub-type="epub">2618-8708</issn><publisher><publisher-name>Sergo Ordzhonikidze Russian State University for Geological Prospecting</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.32454/0016-7762-2018-6-18-40</article-id><article-id custom-type="elpub" pub-id-type="custom">geology-339</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>МИНЕРАЛОГИЯ, ПЕТРОГРАФИЯ, ЛИТОЛОГИЯ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>MINERALOGY, PETROGRAPHY, LITHOLOGY</subject></subj-group></article-categories><title-group><article-title>Минеральный состав и геммологические характеистики окаменелого дерева Ульяновской области</article-title><trans-title-group xml:lang="en"><trans-title>Mineral composition and gemological characteristics of the petrified wood of the Ulyanovsk region</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>Петроченков</surname><given-names>Д. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Petrochenkov</surname><given-names>D. A.</given-names></name></name-alternatives><email xlink:type="simple">p-d-a@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>ФГБОУ ВО «Российский государственный геологоразведочный университет имени С. Орджоникидзе»</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Russian State Geological Prospecting University</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2018</year></pub-date><pub-date pub-type="epub"><day>01</day><month>01</month><year>2019</year></pub-date><volume>0</volume><issue>6</issue><fpage>18</fpage><lpage>40</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Петроченков Д.А., 2019</copyright-statement><copyright-year>2019</copyright-year><copyright-holder xml:lang="ru">Петроченков Д.А.</copyright-holder><copyright-holder xml:lang="en">Petrochenkov D.A.</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.geology-mgri.ru/jour/article/view/339">https://www.geology-mgri.ru/jour/article/view/339</self-uri><abstract><p>Впервые изучены минеральный состав и геммологические характеристики окаменелого дерева Ульяновской области ювелирно-поделочного качества. Окаменелое дерево связано с нижнемеловыми отложениями и состоит преимущественно из кальцита (до 73 мае. %), присутствуют пирит, апатит, гипс; фиксируются доломит, ангидрит, гематит, пиролюзит, органическое вещество, рентгеноаморфное вещество. По технологическим и декоративным характеристикам окаменелое дерево Ульяновской области является качественным ювелирно-поделочным материалом флорогенной группы.</p></abstract><trans-abstract xml:lang="en"><p>For the first time, the mineral composition and gemological characteristics of the petrified wood from the Ulyanovsk region, of jewelry and ornamental quality, have been studied. The petrified wood is associated with the Lower Cretaceous deposits and consists mainly of calcite (up to 73 mass. %); pyrite, apatite, gypsum are present; dolomite, anhydrite, hematite, pyrolusite, organic matter and X-ray amorphous substance have been fixed. According to the technological and decorative characteristics, the petrified wood of the Ulyanovsk region is a quality jewelry and ornamental material of the florogenic group.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>ювелирно-поделочное сырьё</kwd><kwd>окаменелое дерево</kwd><kwd>кальцит</kwd><kwd>нижнемеловые отложения</kwd><kwd>Ульяновская область</kwd></kwd-group><kwd-group xml:lang="en"><kwd>jewelry and ornamental raw materials</kwd><kwd>petrified wood</kwd><kwd>calcite</kwd><kwd>Lower Cretaceous deposits</kwd><kwd>Ulyanovsk region</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">Барабошкин Е.Ю. Палеогеография Восточно-Европейской платформы и ее южного обрамления в раннем мелу // Серия аналитических обзоров «Очерки по региональной геологии России». Вып. 1. М: Изд. Геокарг. ГЕОС, 2005. 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