gtcrustГеодинамика и тектонофизикаGeodynamics & Tectonophysics2078-502XInstitute of the Earth's crust of the Russian Academy of Sciences, Siberian Branch10.5800/GT-2025-16-5-0852falzbcgtcrust-2113Research ArticleПАЛЕОГЕОДИНАМИКАPALEOGEODYNAMICSВОЗРАСТ И СОСТАВ ЭОЦЕНОВЫХ ПЕСЧАНИКОВ ЗАПАДНОЙ КАМЧАТКИ: РЕКОНСТРУКЦИЯ ИСТОЧНИКОВ СНОСА ДЛЯ НЕФТЕГАЗОНОСНЫХ КОЛЛЕКТОРОВ ОХОТСКОГО МОРЯAGE AND COMPOSITION OF EOCENE SANDSTONES IN WESTERN KAMCHATKA: APPLICATION TO THE STUDY OF PROVENANCE FOR PETROLEUM RESERVOIRS OF THE SEA OF OKHOTSKСоловьевА. В.SolovievA. V.

105118, Москва, ш. Энтузиастов, 36; 119017, Москва, Пыжевский пер., 7, стр. 1

Alexey V. Soloviev

36 Rte Entuziastov, Moscow 105118; , 7-1 Pyzhevsky Ln, Moscow 119017

soloviev@vnigni.ruХисамутдиноваА. И.KhisamutdinovaA. I.

119017, Москва, Пыжевский пер., 7, стр. 1

7-1 Pyzhevsky Ln, Moscow 119017

ХоуриганДж. К.HouriganJ. K.

CA 95064, Санта Круз, Хай Стрит, 1156

1156 High St, CA 95064, Santa Cruz

АкининВ. В.AkininV. V.

685000, Магадан, ул. Портовая, 16

16 Portovaya St, Magadan 685000

ЛевочскаяД. В.LevochskayaD. V.

680000, Хабаровск, ул. Муравьева-Амурского, 18

18 Muravyova-Amursky St, Khabarovsk 680000

Всероссийский научно-исследовательский геологический нефтяной институт; Геологический институт РАНРоссияAll-Russian Scientific Research Geological Oil Institute; Geological Institute, Russian Academy of SciencesRussian FederationГеологический институт РАНРоссияGeological Institute, Russian Academy of SciencesRussian FederationУниверситет Калифорнии Санта КрузСоединённые Штаты АмерикиUniversity of California-Santa CruzUnited StatesСеверо-Восточный комплексный научно-исследовательский институт им. Н.А. Шило ДВО РАНРоссияShilo North East Interdisciplinary Scientific Research Institute, Far Eastern Branch of the Russian Academy of SciencesRussian FederationАО «Полиметалл», Хабаровский филиалРоссияJSC “Polymetal”, Khabarovsk BranchRussian Federation202517102025165852852Copyright © Соловьев А.В., Хисамутдинова А.И., Хоуриган Д.К., Акинин В.В., Левочская Д.В., 20252025Соловьев А.В., Хисамутдинова А.И., Хоуриган Д.К., Акинин В.В., Левочская Д.В.Soloviev A.V., Khisamutdinova A.I., Hourigan J.K., Akinin V.V., Levochskaya D.V.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/2113

Литология, состав, U-Pb LA-ICP-MS возраст зерен обломочного циркона из осадочных пород Западно-Камчатского бассейна (Дальний Восток России) дают важную информацию о палеогеографии и тектонической обстановке в Охотском море в эоцене. Исследование основано на картировании, структурных наблюдениях, описании разрезов и литологии, составе песчаников, U-Pb LA-ICP-MS датировании и морфологическом анализе обломочного циркона из эоценовых песчаников Западно-Камчатского бассейна. Основным источником сноса песчаника был рециклированный ороген с влиянием магматической дуги. Анализ тяжелых минералов указывает на смесь материала из базитовых и сиалических источников. Террейны основного состава Азиатской окраины с запада и/или Олюторско-Камчатская энсиматическая островная дуга с востока поставляли основной материал в Западно-Камчатский бассейн в эоцене. Источниками сноса сиалических обломков были континентальные блоки на окраине Азии и Охотско-Чукотский вулканический пояс.

Новые данные доказывают, что эрозия Охотско-Чукотского пояса оказала существенное влияние на осадконакопление на севере Охотского моря в эоцене. Можно предположить, что речная система Палео-Пенжины уже существовала в эоцене. Наличие сиалических источников в эоцене позволяет предположить возможность обнаружения качественных коллекторов в эоценовых отложениях Западно-Камчатского бассейна и севера Охотского моря.

The lithology, composition, U-Pb LA-ICP-MS ages of detrital zircons from sediments of the Western Kamchatka Basin (Russian Far East) provide important insight into paleogeography and tectonic setting of the Sea of Okhotsk in the Eocene. Our study is based on mapping, structural observations, descriptions of the sections and lithology, composition of the sandstones, and U-Pb LA-ICP-MS dating and morphology analysis of detrital zircons from the Eocene sandstones of the Western Kamchatka Basin. The provenance for the sandstones is mainly associated with orogen recycling in magmatic arcs. The analysis of heavy minerals indicates mafic to sialic sources. The mafic terranes of the Asian margin on the west or/and Olyutorka-Kamchatka ensimatic island arc affected the mechanism transferring the basic material to the Western Kamchatka Basin in the Eocene. The sialic clasts originated from continental blocks of the Asian margin and the Okhotsk-Chukotka volcanic belt.

New data allow us to prove that the erosion of the Okhotsk-Chukotka belt had a significant influence on the sedimentation system in the north of the Sea of Okhotsk in the Eocene. We can assume that the Paleo-Penzhina River system already existed in the Eocene. The existence of the sialic sources in Eocene allows us to assume the possibility of finding the good quality collectors in the Eocene deposits of the Western Kamchatka Basin and the north of the Sea of Okhotsk.

обломочный цирконморфологияU-Pb LA-ICP-MS датированиеисточники сносаэоценЗападно-Камчатский бассейнОхотское мореdetrital zirconsmorphologyU-Pb LA-ICP-MS datingprovenanceEoceneWestern Kamchatka BasinSea of OkhotskПолевые работы финансировались компанией PetroKamchatka PLC. Исследования проведены при поддержке РФФИ (гранты № 13-05-00485_а, № 12-05-31299 мол_а) в рамках госзадания Геологического института РАН (проект № ФММГ-2023-0009). U-Pb датирование детритовых цирконов проводилось в Arizona LaserChron Center по гранту NSF-EAR 0732436.The field work was financed by PetroKamchatka PLC. The study was supported by the Russian Foundation for Basic Research (grants No. 13-05-00485_a and No. 12-05-31299 mol_a) on the state assignment of the Geological Institute RAS (project No. FMMG-2023-0009). The detrital zircon U-Pb dating was performed in Arizona LaserChron Center under grant NSF-EAR 0732436.ReferencesAkinin V.V., Miller E.L., 2011. 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The authors declare that there are no conflicts of interest present.