gtcrustГеодинамика и тектонофизикаGeodynamics & Tectonophysics2078-502XInstitute of the Earth's crust of the Russian Academy of Sciences, Siberian Branch10.5800/GT-2019-10-1-0405gtcrust-770Research ArticleПАЛЕОГЕОДИНАМИКАPALEOGEODYNAMICSРАННЕПЕРМСКИЙ (300–270 МЛН ЛЕТ) МАГМАТИЗМ ВОСТОЧНОГО КАЗАХСТАНА КАК РЕЗУЛЬТАТ СОЧЕТАНИЯ ПЛЕЙТ- И ПЛЮМ-ТЕКТОНИЧЕСКИХ ФАКТОРОВA REVIEW OF EARLY PERMIAN (300–270 MA) MAGMATISM IN EASTERN KAZAKHSTAN AND IMPLICATIONS FOR PLATE TECTONICS AND PLUME INTERPLAYhttps://orcid.org/0000-0001-5951-0660ХромыхС. В.KhromykhS. V.

Сергей Владимирович Хромых - кандидат геолого-минералогических наук, старший научный сотрудник Институт геологии и минералогии им. В.С. Соболева СО РАН

630090, Новосибирск, просп. Академика Коптюга, 3, 630090, Новосибирск, ул. Пирогова, 2

Sergei V. Khromykh - Candidate of Geology and Mineralogy, Senior Researcher V.S. Sobolev Institute of Geology and Mineralogy, Siberian Branch of RAS

3 Academician Koptyug ave, Novosibirsk 630090, 

2 Pirogov street, Novosibirsk 630090

serkhrom@mail.ruhttps://orcid.org/0000-0002-9654-6889КотлерП. Д.KotlerP. D.

Павел Дмитриевич Котлер - кандидат геолого-минералогических наук, младший научный сотрудник Институт геологии и минералогии им. В.С. Соболева СО РАН

630090, Новосибирск, просп. Академика Коптюга, 3, 630090, Новосибирск, ул. Пирогова, 2

Pavel D. Kotler - Candidate of Geology and Mineralogy, Junior Researcher V.S. Sobolev Institute of Geology and Mineralogy, Siberian Branch of RAS

3 Academician Koptyug ave, Novosibirsk 630090, 

2 Pirogov street, Novosibirsk 630090

pkotler@yandex.ruИзохА. Э.IzokhA. E.

Андрей Эмильевич Изох - доктор геолого-минералогических наук, профессор, заведующий лабораторией Институт геологии и минералогии им. В.С. Соболева СО РАН

630090, Новосибирск, просп. Академика Коптюга, 3, 630090, Новосибирск, ул. Пирогова, 2

Andrey E. Izokh - Doctor of Geology and Mineralogy, Professor, Head of Laboratory V.S. Sobolev Institute of Geology and Mineralogy, Siberian Branch of RAS

3 Academician Koptyug ave, Novosibirsk 630090, 

2 Pirogov street, Novosibirsk 630090

izokh@igm.nsc.ruКрукН. Н.KrukN. N.

Николай Николаевич Крук - доктор геолого-минералогических наук, директор института

630090, Новосибирск, просп. Академика Коптюга, 3

Nikolai N. Kruk - Doctor of Geology and Mineralogy, Director of the Institute

3 Academician Koptyug ave, Novosibirsk 630090

kruk@igm.nsc.ruИнститут геологии и минералогии им. В.С. Соболева СО РАН; Новосибирский национальный исследовательский государственный университетРоссияV.S. Sobolev Institute of Geology and Mineralogy, Siberian Branch of RAS; Novosibirsk State UniversityRussian FederationИнститут геологии и минералогии им. В.С. Соболева СО РАНРоссияV.S. Sobolev Institute of Geology and Mineralogy, Siberian Branch of RASRussian Federation2019210320191017999Copyright © Хромых С.В., Котлер П.Д., Изох А.Э., Крук Н.Н., 20192019Хромых С.В., Котлер П.Д., Изох А.Э., Крук Н.Н.Khromykh S.V., Kotler P.D., Izokh A.E., Kruk N.N.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://www.gt-crust.ru/jour/article/view/770

В истории развития крупнейшего Центрально-Азиатского складчатого пояса (ЦАСП) выявлены несколько периодов крупномасштабной эндогенной активности, характеризующихся проявлениями значительных объемов вулканических и интрузивных (как базитовых, так и гранитоидных) пород на обширных территориях в сравнительно короткие временные интервалы (30–40 млн лет). Эти вспышки магматической активности обычно происходят после завершения аккреционно-коллизионных процессов в складчатых системах и рассматриваются как результат воздействия мантийных плюмов на литосферу – крупные изверженные провинции. Одним из ярких примеров является Тарим-Южномонгольская крупная изверженная провинция (300–270 млн лет назад), характеризующаяся широким развитием базитового и гранитоидного магматизма в западной части ЦАСП. Исследования последних лет показали, что в Восточном Казахстане, в пределах Алтайской коллизионной системы герцинид, широко распространены как базитовые, так и гранитоидные комплексы раннепермского возраста (300–270 млн лет). В приведенном кратком обзоре показано, что особенности состава и условия формирования этих магматических ассоциаций позволяют рассматривать их как результат северо-западного распространения влияния Таримской крупной изверженной провинции. Распространение этого термического возмущения в литосфере,по-видимому, стало возможным благодаря пост-орогеническому растяжению после коллизии Сибирского и Казахстанского континентов. Реологическое ослабление литосферы позволило глубинным расплавам проникать в литосферную мантию, образовав крупные очаги базитовых магм. Таким образом, современный геологический облик и металлогеническая специфика территории Восточного Казахстана является результатом плейт-тектонических процессов посторогенического растяжения на фоне повышенного термического градиента в мантии, вызванного активностью Таримского мантийного плюма.

The history of the Central Asian Orogenic Belt (CAOB) was marked by several major events of magmatism which produced large volumes of volcanic and intrusive (mafic-ultramafic and granitic) rocks within a relatively short time span (30–40 Ma) over a vast area. The magmatic activity postdated the orogenic stages of accretionary-collisional belts in Central Asia and likely resulted from the impact of mantle plumes that formed Large Igneous Provinces (LIPs). The formation of the Tarim–South Mongolia LIP at 300–270 Ma is the best known among the major Permian events of basaltic and granitic magmatism. Early Permian igneous rocks (volcanic, subvolcanic and intrusive suites that vary from ultramafic to felsic compositions) of the same age range (300 to 270 Ma) have been recently found also in Eastern Kazakhstan, within the late Paleozoic Altai collisional system. The compositions and ages of the rocks suggest that the Eastern Kazakhstan magmatism was the northward expansion of the Tarim LIP. The spread of the Tarim LIP was apparently facilitated by lithospheric extension after the Siberia-Kazakhstan collision. The extension led to rheological weakening of the lithosphere whereby deep mantle melts could penetrate to shallower depths. The early Permian history of Eastern Kazakhstan was controlled by the interplay of plate tectonic and plume processes: plate-tectonic accretion and collision formed the structural framework, and the Tarim mantle plume was a heat source maintaining voluminous magma generation.

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The authors declare that there are no conflicts of interest present.