INTRODUCTION TO THE PROCEEDINGS VOLUME OF THE SECOND RUSSIA–CHINA INTERNATIONAL MEETING ON THE CENTRAL ASIAN OROGENIC BELT

Second Russia-China International Meeting on the Central Asian Orogenic Belt (September 6–8th, 2017, Irkutsk, Russia) with post-conference excursion (September 9–12th, 2017, Baikal area, Siberia, Russia) continues tradition of the Russian-Chinese conferences begun in 2015.Second Russia-China International Meeting on the Central Asian Orogenic Belt (September 6–8th, 2017, Irkutsk, Russia) with post-conference excursion (September 9–12th, 2017, Baikal area, Siberia, Russia) continues tradition of the Russian-Chinese conferences begun in 2015

LATE MESOZOIC GRANITOIDS OF THE WESTERN TRANSBAIKALIA (RUSSIA) AND THEIR RELATION TO FORMATION OF METAMORPHIC CORE COMPLEXES

Early Cretaceous metamorphic core complexes (MCCs) are widespread in North-East Asia and indicate a large-scale crustal extension in this area [Wang et al., 2011, 2012]. Traditionally one of the formation mechanisms of MCCs is related to various magmatic activities including granitoid magmatism [Anderson et al., 1988, Hill et al., 1995; Lister, Baldwin, 1993]. Wang et al. [2012] have subdivided the intrusion associated with MCCs in NE Asia into pre-kinematic (~170–140 Ma), syn-kinematic (~150–125 Ma) and post-kinematic (~125–110 Ma). 40Ar/39Ar biotite and hornblende ages of 140–110 Ma are overlapping for all MCCs of NE Asia and represent the time of the final stage of the MCCs formation [Wang et al., 2012]. Here, we present overview of geochronological and geochemical data for Late Mesozoic granitoids of the Western Transbaikalia and our view on their role in formation of Transbaikalian MCCs.Early Cretaceous metamorphic core complexes (MCCs) are widespread in North-East Asia and indicate a large-scale crustal extension in this area [Wang et al., 2011, 2012]. Traditionally one of the formation mechanisms of MCCs is related to various magmatic activities including granitoid magmatism [Anderson et al., 1988, Hill et al., 1995; Lister, Baldwin, 1993]. Wang et al. [2012] have subdivided the intrusion associated with MCCs in NE Asia into pre-kinematic (~170–140 Ma), syn-kinematic (~150–125 Ma) and post-kinematic (~125–110 Ma). 40Ar/39Ar biotite and hornblende ages of 140–110 Ma are overlapping for all MCCs of NE Asia and represent the time of the final stage of the MCCs formation [Wang et al., 2012]. Here, we present overview of geochronological and geochemical data for Late Mesozoic granitoids of the Western Transbaikalia and our view on their role in formation of Transbaikalian MCCs

Paleomagnetism of Cryogenian Kitoi mafic dykes in South Siberia: Implications for Neoproterozoic paleogeography

We present a new paleomagnetic pole of 1.1°N, 22.4°E, A95 = 7.4° from the 760 Ma gabbro-dolerite Kitoi dykes located in the southern part of the Siberian Craton. The pole is supported by contact tests and suggests closer position of Siberia relative to Laurentia at 760 Ma than in Mesoproterozoic. We propose that this closer configuration was achieved by dextral transpressive motion of Siberia relative to Laurentia between 780 and 760 Ma. This motion was probably initiated at the first stage of the Rodinia breakup and is coeval with the 780 Ma Gunbarrel magmatic event of the western Canadian shield

EARLY STAGE OF THE CENTRAL ASIAN OROGENIC BELT BUILDING: EVIDENCES FROM THE SOUTHERN SIBERIAN CRATON

The origin of the Central-Asian Orogenic Belt (CAOB), especially of its northern segment nearby the southern margin of the Siberian craton (SC) is directly related to development and closure of the Paleo-Asian Ocean (PAO). Signatures of early stages of the PAO evolution are recorded in the Late Precambrian sedimentary successions of the Sayan-Baikal-Patom Belt (SBPB) on the southern edge of SC. These successions are spread over 2000 km and can be traced along this edge from north-west (Sayan area) to south-east (Baikal area) and further to north-east (Patom area). Here we present the synthesis of all available and reliable LA-ICP-MS U-Pb geochronological studies of detrital zircons from these sedimentary successions.The origin of the Central-Asian Orogenic Belt (CAOB), especially of its northern segment nearby the southern margin of the Siberian craton (SC) is directly related to development and closure of the Paleo-Asian Ocean (PAO). Signatures of early stages of the PAO evolution are recorded in the Late Precambrian sedimentary successions of the Sayan-Baikal-Patom Belt (SBPB) on the southern edge of SC. These successions are spread over 2000 km and can be traced along this edge from north-west (Sayan area) to south-east (Baikal area) and further to north-east (Patom area). Here we present the synthesis of all available and reliable LA-ICP-MS U-Pb geochronological studies of detrital zircons from these sedimentary successions

Временные рубежи крупных изверженных провинций России: предварительный обзор

This is an initial step toward a full-scale review paper and map of Large Igneous Provinces (LIPs) for Russia

OUTLINE OF GRANITOIDS OF THE CENTRAL ASIA OROGENIC BELT: FOCUSED ON THE SOUTHERN PART

the Siberian craton to the north and the TarimNorth China cratons to the south, is a complex collage of microcontinental blocks, island arcs, oceanic crustal remnants and continental marginal facies rocks. It is one of the largest and most complex accretionary orogenic belts and the most important site of Phanerozoic continental growth on the Earth [Jahn et al., 2000, 2004; Kovalenko et al., 2004] The widespread occurrence of large volumes of granitoids, mostly with juvenile sources, is a typical characteristic of the CAOB. These granitoids have been intensely studied (e.g. [Jahn et al., 2000, 2004; Kovalenko et al., 2004; Sorokin et al., 2004; Vladimirov et al., 2001; Han et al., 2010; Wang et al., 2006, 2015; Wu et al., 2011; Li et al., 2013; Yarmolyuk et al., 2002]). However, these studies mainly focused on some certain countries or regions.The Central Asian Orogenic Belt (CAOB), bounded by the Siberian craton to the north and the TarimNorth China cratons to the south, is a complex collage of microcontinental blocks, island arcs, oceanic crustal remnants and continental marginal facies rocks. It is one of the largest and most complex accretionary orogenic belts and the most important site of Phanerozoic continental growth on the Earth [Jahn et al., 2000, 2004; Kovalenko et al., 2004] The widespread occurrence of large volumes of granitoids, mostly with juvenile sources, is a typical characteristic of the CAOB. These granitoids have been intensely studied (e.g. [Jahn et al., 2000, 2004; Kovalenko et al., 2004; Sorokin et al., 2004; Vladimirov et al., 2001; Han et al., 2010; Wang et al., 2006, 2015; Wu et al., 2011; Li et al., 2013; Yarmolyuk et al., 2002]). However, these studies mainly focused on some certain countries or regions

К 60-ЛЕТНЕМУ ЮБИЛЕЮ ЧЛЕНА-КОРРЕСПОНДЕНТА РАН ЕВГЕНИЯ ВИКТОРОВИЧА СКЛЯРОВА

The article is devoted to the 60th Jubilee of Evgeny V. Sklyarov, a recognized expert in a wide variety of igneous and metamorphic processes and geodynamics. He is a Corresponding Member of the Russian Academy of Sciences, Professor, Doctor of Geology and Mineralogy, Chief Researcher of Laboratory of Paleogeodynamics in IEC SB RAS, and Chief Editor of Geodynamics and Tectonophysics.Статья посвящена 60-летию авторитетного специалиста в широкой области магматических и метаморфических процессов и геодинамики, члена-корреспондента РАН, доктора геолого-минералогических наук, главного научного сотрудника лаборатории палеогеодинамики ИЗК СО РАН, главного редактора журнала «Геодинамика и тектонофизика», профессора Евгения Викторовича Склярова

ИНСТИТУТУ ЗЕМНОЙ КОРЫ СИБИРСКОГО ОТДЕЛЕНИЯ РАН 65 ЛЕТ: СОВРЕМЕННОЕ СОСТОЯНИЕ И ВЗГЛЯД В БУДУЩЕЕ

 In February 2014, the Institute of the Earth’s Crust of Siberian Branch of the Russian Academy of Sciences celebrated its 65th anniversary. As of 01 January 2014, there are 300 employees in its staff, including one Full Member of RAS, one Corresponding Member of RAS, 27 Doctors and 74 Candidates of Sciences. Postgraduate courses are taken by 33 young researchers. The Institute has 13 laboratories and the Analytical Centre to research recent endo- and exogeodynamics, geological environment and seismicity, mineral resources, underground water dynamics and geoecology, internal structure, paleogeodynamics, endogenic processes and fluid dynamics of the continental lithosphere. From 2009 to 2013, the Institute has published 775 scientific papers in Russia and abroad, implemented 145 projects supported by grants from the Russian Foundation for Basic Research, 21 projects under the Fundamental Research Program of the RAS Presidium and the Earth Sciences Section of RAS, 27 integration projects of SB RAS, and 22 programs of fundamental studies of RAS. The Institute fulfilled more than 50 scientific research contracts with industrial companies in Siberia and several state contracts with governments of the RF regions. Educational research, science organization and international activities are successfully implemented. Renovation and retrofit replacement of equipment, instruments and tools is ensured. A fitting testimony to scientific achievements of IEC SB RAS is that it ranks among leading research institutes in the Earth sciences in Russia and abroad, as confirmed by all the RAS performance indicators.   В феврале 2014 г. Институту земной коры Сибирского отделения Российской академии наук исполнилось 65 лет. На начало 2014 г. в институте трудится около 300 сотрудников, среди которых 1 действительный член РАН, 1 член-корреспондент РАН, 27 докторов и 74 кандидата наук. Обучение в аспирантуре проходят 33 будущих молодых ученых. В структуре института функционирует 13 лабораторий и Аналитический центр, сотрудники которых выполняют исследования по следующим основным научным направлениям: современная эндо- и экзогеодинамика, геологическая среда и сейсмический процесс, ресурсы, динамика подземных вод и геоэкология, внутреннее строение, палеогеодинамика, эндогенные процессы и флюидодинамика континентальной литосферы. За период с 2009 по 2013 г. в институте опубликовано 775 статей в российских и зарубежных научных журналах, выполнено 145 грантов РФФИ, 21 проект по программам фундаментальных исследований Президиума РАН и Отделения наук о Земле РАН, 27 интеграционных проектов СО РАН, 22 программы фундаментальных исследований РАН, заключено и успешно исполнено более 50 договоров НИОКР с крупными промышленными организациями Сибири, а также ряд государственных контрактов с правительствами субъектов РФ. В институте активно развивается научно-педагогическая, научно-организационная и международная деятельность, обновляется и модернизируется материально-техническая и приборно-аналитическая база. По всем показателям, обозначенным в ходе реформы РАН в качестве основных критериев оценки результативности научных организаций, ИЗК СО РАН занимает достойное место среди институтов-лидеров страны и мира, выполняющих исследования в области наук о Земле.

ГЛУБИННОЕ СТРОЕНИЕ И ПАЛЕОГЕОДИНАМИКА СИБИРИ И ЦЕНТРАЛЬНОЙ АЗИИ В РАБОТАХ ИНСТИТУТА ЗЕМНОЙ КОРЫ СО РАН (2009–2013 ГГ.)

The deep structure and paleogeodynamics of the Siberian craton and the Central Asian folded belt are studied by two specialized laboratories of the Institute of the Earth’s Crust, SB RAS – the Laboratory of Complex Geophysics and the Laboratory of Paleogeodynamics. A variety of modern geophysical methods is applied. Surface wave tomography is focused on determination of 3D velocity structure of the upper mantle. Seismic, gravimetric and electrical surveys are aimed at stu­dies of structures of the crust and the upper mantle. Geothermic parameters of the lithosphere in Central Asia are measured. In search for mineral resources, new geophysical prospecting technologies are developed. Quality paleogeodynamics reconstructions require a proper understanding of the structural evolution of the Siberian craton and the Central Asian folded belt. Researches in this scientific field are conducted by the Laboratory of Paleogeodynamics. Besides, the Laboratory studies new minerals and conditions of their formation. Some of the scientific research projects are jointly implemented by the two laboratories, and research results are regularly published in Russia and abroad.   Изучением глубинного строения и палеогеодинамики Сибирского кратона и Центрально-Азиатского складчатого пояса занимаются две специализированные лаборатории ИЗК СО РАН: лаборатория комплексной геофизики и лаборатория палеогеодинамики. Использование геофизических методов в рамках данной тематики ориентировано на определение трехмерной скоростной структуры верхней мантии методом поверхностно-волновой томографии, изучение строения земной коры и верхней мантии сейсмическими, гравиметрическими и электроразведочными методами, измерение геотермических параметров литосферы Центральной Азии и разработку новых технологий поиска месторождений полезных ископаемых. Выполнение качественных палеогеодинамических реконструкций требует расшифровки сценария становления структуры Сибирского кратона и Центрально-Азиатского складчатого пояса. Исследованием этой проблемы занимаются сотрудники лаборатории палеогеодинамики. Отдельным направлением в данной лаборатории является изучение новых минералов и выяснение условий их образования. Сотрудники лабораторий ведут скоординированные научные исследования, результаты которых активно публикуются в ведущих российских и зарубежных научных изданиях.