gtcrustГеодинамика и тектонофизикаGeodynamics & Tectonophysics2078-502XInstitute of the Earth's crust of the Russian Academy of Sciences, Siberian Branch10.5800/GT-2018-9-4-0398gtcrust-684Research ArticleПАЛЕОГЕОДИНАМИКАPALEOGEODYNAMICSИСТОЧНИКИ И ОБЛАСТИ СНОСА ВЕРХНЕПАЛЕОЗОЙСКИХ МЕТАОСАДОЧНЫХ ПОРОД ДЖАГДИНСКОГО ТЕРРЕЙНА МОНГОЛО-ОХОТСКОГО СКЛАДЧАТОГО ПОЯСА: РЕЗУЛЬТАТЫ SM-ND ИЗОТОПНО-ГЕОХИМИЧЕСКИХ ИССЛЕДОВАНИЙSOURCES AND SOURCE AREAS OF THE UPPER PALEOZOIC METASEDIMENTARY ROCKS OF THE DZHAGDA TERRANE OF THE MONGOL-OKHOTSK FOLD BELT: THE RESULTS OF SM-ND ISOTOPE GEOCHEMICAL STUDIEShttps://orcid.org/0000-0003-2842-0608ЗаикаВ. А.ZaikaV. A.

Виктор Александрович Заика - аспирант, младший научный сотрудник.

675000, Благовещенск, пер. Рёлочный, 1

Viktor A. Zaika - Post-Graduate Student, Junior Researcher.

1 Relochniylane, Blagoveschensk 675000

zaikava@ignm.ruhttps://orcid.org/0000-0002-8879-5412СорокинА. А.SorokinA. A.

Андрей Анатольевич Сорокин - доктор геолого-минералогических наук, директор, заведующий лабораторией.

675000, Благовещенск, пер. Рёлочный, 1

Andrey A. Sorokin - Doctor of Geology and Mineralogy, Director, Head of laboratory.

1 Relochniylane, Blagoveschensk 675000

sorokin@ascnet.ruКовачВ. П.KovachV. P.

Виктор Петрович Ковач - кандидат геолого-миралогических наук, старший научный сотрудник.

199034, Санкт-Петербург, набережная Макарова, 2

Viktor P. Kovach - Candidate of Geology and Mineralogy, Senior Researcher.

2 Makarova emb., Saint Petersburg 199034

v.p.kovach@gmail.comИнститут геологии и природопользования ДВО РАНРоссияInstitute of Geology and Nature Management, Far East Branch of RARussian FederationИнститут геологии и геохронологии докембрия РАНРоссияInstitute of Precambrian Geology and Geochronology of RASRussian Federation2018091220189413311338Copyright © Заика В.А., Сорокин А.А., Ковач В.П., 20182018Заика В.А., Сорокин А.А., Ковач В.П.Zaika V.A., Sorokin A.A., Kovach V.P.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/684

В данном сообщении представлены результаты Sm-Nd изотопно-геохимических исследований верхнепалеозойских метаосадочных пород джескогонской, нектерской, бочагорской свит Джагдинского террейна. Установлено, что эти породы характеризуются слабоварьирующимися значениями Nd-модельного возраста tNd(DM)=1.5–1.0 млрд лет, свидетельствующими о том, что в качестве главных источников сноса протолитов выступали породы, которые имеют в среднем мезопротерозойские оценки Nd-модельного возраста. Показано, что тождественный с Nd-модельным возраст имеют метатерригенные породы теплоключевской, гармаканской и алгаинской свит Тукурингрского террейна Монголо-Охотского пояса. Полученные результаты дают основание полагать, что осадочные породы Джагдинского и Тукурингрского террейнов сформировались за счет материала, поступавшего преимущественно со стороны Амурского супертеррейна (с юга в современных координатах). Подпитка материалом со стороны южной окраины Северо-Азиатского кратона (с севера в современных координатах) либо отсутствовала, либо была минимальной.

The article presents the results of Sm-Nd isotope geochemical studies of the Upper Paleozoic metasedimentary rocks of the Dzheskogon, Nektera and Bochagor suites of the Dzhagda terrane. These rocks are characterized by slightly varying values of the Nd model age tNd(DM)=1.5–1.0 Gyr, which gives evidence that the main sources of protoliths were the rocks of the Mesoproterozoic Nd model age (in average). This Nd model age is similar to the ages of the metaterrigenous rocks of the Teply Klyuch, Garmakan and Alga suites of the Tukuringra terrane of the Mongol-Okhotsk Belt. The results obtained in our studies suggest that the sedimentary rocks of the Dzhagda and Tukuringra terranes developed from the material that was mainly sourced from the Amur superterrane (from the south in modern coordinates). A supply of the material from the southern margin of the North Asian craton (from the north in modern coordinates) was either absent or minimal.

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