MINERAL AND CHEMICAL COMPOSITION OF MANGANESE HARDGROUNDS IN JURASSIC LIMESTONES OF THE WESTERN CARPATHIANS
Published: Oct 2003
Pages: 317 - 328
Authors: IGOR ROJKOVIC, ROMAN AUBRECHT, MILAN MISIK
Abstract: Manganese crusts and nodules in Jurassic limestones correspond to those formed on recent submarine pelagic or hemipelagic non-deposition surfaces and hardgrounds. The ore mineralization is represented by pyrolusite, romancchite, manganite, and iron hydroxides. The structure of the manganese minerals, Mn/Fe and Si/Al ratio and Co, Cu, Ni and REE distribution in the ores indicate hydrogenetic and diagenetic accumulation of manganese minerals. Later, Cretaceous supergene accumulation filled fissures and cavities in the limestones.
Keywords: Tethys, Jurassic, manganese minerals, hardgrounds, chemical composition
Download PDF document
Volume 54 no. 5 / October 2003
JOHN A. WINCHESTER, FRANTISEK PATOCKA, VACLAV KACHLIK, MATTYLD MELZER, CLAIRE NAWAKOWSKI, QUENTIN G. CROWLEY, PETER A. FLOYD
GEOCHEMICAL DISCRIMINATION OF METASEDIMENTARY SEQUENCES IN THE KRKONOSE-JIZERA TERRANE (WEST SUDETES, BOHEMIAN MASSIF): PALEOTECTONIC AND STRATIGRAPHIC CONSTRAINTS
JINDRICH HLADIL, FRANTISEK PATOCKA, VACLAV KACHLIK, ROSTISLAV MELICHAR, MARTIN HUBACIK
METAMORPHOSED CARBONATES OF KRKONOSE MOUNTAINS AND PALEOZOIC EVOLUTION OF SUDETIC TERRANES (NE BOHEMIA, CZECH REPUBLIC)
GYONGYI LELKES-FELVARI, WOLFGANG FRANK, RALF SCHUSTER
GEOCHRONOLOGICAL CONSTRAINTS OF THE VARISCAN, PERMIAN-TRIASSIC AND EO-ALPINE (CRETACEOUS) EVOLUTION OF THE GREAT HUNGARIAN PLAIN BASEMENT
IGOR ROJKOVIC, ROMAN AUBRECHT, MILAN MISIK
MINERAL AND CHEMICAL COMPOSITION OF MANGANESE HARDGROUNDS IN JURASSIC LIMESTONES OF THE WESTERN CARPATHIANS
HASSAN MOHAMED BAIOUMY, ISMAEL SAYED ISMAEL, IBRAHIM HASHEM ZIDAN
CLAY MINERALOGY OF THE NUBIA FORMATION, WESTERN DESERT (EGYPT)
EDYTA JUREWICZ
MULTISTAGE EVOLUTION OF THE SHEAR ZONE AT THE BASE OF THE GIEWONT UNIT, TATRA MOUNTAINS (POLAND)