Transactions of KarRC RAS :: Scientific publications

А.И. Слабунов, А.В. Кервинен, Н.С. Нестерова, А.В. Егоров, О.А. Максимов, П.В. Медведев.

Полихронная история формирования неоархейских полосчатых железистых кварцитов главной рудной толщи Костомукшского зеленокаменного пояса: возраст цирконов и акцессорные минералы

// Труды КарНЦ РАН. No 5. Сер. Геология Докембрия. 2022. C. 139-143

А.I. Slabunov, А.V. Kervinen, N.S. Nesterova, А.V. Egorov, О.А. Maksimov, P.V. Medvedev. Polychronous evolution of neoarchean banded iron formation in the main ore sequence of the Kostomuksha greenstone belt: the age of zircons and accessory minerals // Transactions of Karelian Research Centre of Russian Academy of Science. No 5. Precambrian Geology Series. 2022. Pp. 139-143

Keywords: banded iron formation; zircon; barite; apatite; monazite; Kostomuksha greenstone belt; Karelian Craton

The banded iron formation (BIF) of the Neoarchean (2.76-2.74 Ga) Kostomuksha Formation of the Kostomuksha greenstone belt of the Karelian Craton was shown to contain the following accessory minerals: zircon, apatite, monazite and barite. Zircons from BIF have 2.9-2.8 Ga magmatic cores indicating the presence of Mesoarchean rocks in source areas. Metamorphic zircons were dated at 2.73, 2.64 and 1.86 Ga. They mark the polymetamorphic evolution.

URL: http://journals.krc.karelia.ru/index.php/precambrian/article/view/1666

DOI: 10.17076/geo1666