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Earth Science Institute of the Slovak Academy of Sciences

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Polish Geological Institute Institute of Geology - Academy of Sciences of the Czech Republic

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Veda, Publishing House of the Slovak Academy of Sciences

A HEAVY MINERAL ASSOCIATION AND ITS PALEOGEOGRAPHICAL IMPLICATIONS IN THE EOCENE BRKINI FLYSCH BASIN (SLOVENIA)

• Geologica Carpathica
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• Volume 52 No.4 / August 2001

Published: Aug 2001

Pages: 239 - 245

Authors: DAVIDE LENAZ, ANTONIO ALBERTI, GIORGIO TUNIS, FRANCESCO PRINCIVALLE

Abstract: The heavy mineral assemblages of the Brkini Flysch Basin (Western Slovenia) have been studied in some detail, and new minerals, hitherto not mentioned in the literature have been found. Among these, Cr-spinels, ilmenites and one orthopyroxene were recognized. All of them were chemically characterized. Chemical analyses on garnets have been carried out in order to discriminate between different end-members and they turned out to be similar to those found in both the Julian (Slovenian) and Istrian basins located to the NW and SE of Brkini, respectively. The chemistry of Cr-spinels suggests that both peridotitic (type-II and minor type-I peridotites Cr-spinels) and volcanic spinels are present. This fact suggests that the Outer Dinarides of former Yugoslavia, where type-I peridotites are present, began to be eroded by Middle Eocene. Moreover, similarities between the minerals of Brkini and those of the Julian and Istrian basins show that supplies from both the NW and the SE areas are present.

Keywords: Brkini, flysch, chemistry of heavy minerals, Cr-spinel

Volume 52 no. 4 / August 2001

• SLAVOMIR NEHYBA, JAROMIR LEICHMANN, JIRI KALVODA

  DEPOSITIONAL ENVIRONMENT OF THE "OLD RED" SEDIMENTS IN THE BRNO AREA (SOUTH-EASTERN PART OF THE RHENOHERCYNIAN ZONE, BOHEMIAN MASSIF)

• JIRI KALVODA

  UPPER DEVONIAN–LOWER CARBONIFEROUS FORAMINIFERAL PALEOBIOGEOGRAPHY AND PERIGONDWANA TERRANES AT THE BALTICA-GONDWANA INTERFACE

• BARBARA OLSZEWSKA, JOZEF WIECZOREK

  JURASSIC SEDIMENTS AND MICROFOSSILS OF THE ANDRYCHOW KLIPPES (OUTER WESTERN CARPATHIANS)

• OVIDIU DRAGASTAN, MILAN MISIK

  NON-MARINE LOWER CRETACEOUS ALGAE AND CYANOBACTERIA FROM THE CZORSZTYN UNIT, WESTERN CARPATHIANS

• DAVIDE LENAZ, ANTONIO ALBERTI, GIORGIO TUNIS, FRANCESCO PRINCIVALLE

  A HEAVY MINERAL ASSOCIATION AND ITS PALEOGEOGRAPHICAL IMPLICATIONS IN THE EOCENE BRKINI FLYSCH BASIN (SLOVENIA)

• CEMAL TUNOGLU, CUNEYT BILEN

  BURDIGALIAN–LANGHIAN (MIOCENE) OSTRACOD BIOSTRATIGRAPHY AND CHRONO-STRATIGRAPHY OF THE KASABA BASIN (KAS/ANTALYA), SW TURKEY