Doru-Toader JURAVLE¹, Carmen Mariana CHIRA², Silvia MARE¹, Viorel IONESI¹, Dumitru BULGARIU¹, Iuliana Gabriela BREABĂN¹ & Angelica JURAVLE^3
1“Alexandru Ioan Cuza” University, Faculty of Geography and Geology, 20 A, Carol I Street, RO-700505, Iaşi, Romania, jdorut@yahoo.com;
²Babes-Bolyai University, Faculty of Biology and Geology, Department of Geology, 1 Kogălniceanu Street, RO-400084, Cluj-Napoca, Romania,
³Independent geologist, 9 B, Dimitrie Cantemir Street, RO-700233, Iasi, Romania

EVENTS IN THE NORTHERN PALEOGENE FORELAND BASIN OF THE EASTERN CARPATHIANS (ROMANIA, BUCOVINA), AT THE YPRESIAN-LUTETIAN TRANSITION

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Global post-Cretaceous events have triggered changes in both terrestrial and marine environments, which have left biostratigraphic, sedimentological and chemostratigraphic traces in all sedimentary basins. The present study focuses on the outcome of such events, as recorded in the sedimentary sequence of the Ypresian (Yp)-Lutetian (Lu) boundary in the northern part of the Moldavidic Basin of the Eastern Carpathians (Bucovina). With this purpose, a section from the eastern portion of the Moldavidic Paleogene foreland basin (the Tarcău Nappe), where the deposits crop out in a sedimentary continuum at the Yp/Lu boundary, was selected, and correlated with profiles exposed across an east-west direction by the Suceava River. The Yp/Lu transition was established based on biostratigraphic data (calcareous nannoplankton and agglutinated foraminifera), and the collection of samples for chemostratigraphic determinations and analyses was carried out following the succession of depositional events (one sedimentological sequence at a time). The chemostratigraphic response of the climatic evolution from the Paleocene-Eocene Thermal Maximum (PETM), followed by the evolution toward the Early Eocene Climatic Optimum (EECO), was recorded in the variation curves of CaCO₃, total carbon (TC), total organic carbon (TOC), total inorganic carbon (TIC), and the ⁸⁸Sr/⁸⁵Rb ratio.