Nanostruktury spoiwa fosforanowego i formy bakteriopodobne w zlepieńcu fosforytowym Gór Pieprzowych
Abstract
NANOSTRUCTURES OF PHOSPHORATE CEMENT AND BACTERIA-LIKE FEATURES IN PHOSPHORITE CONGLOMERATE OF THE PIEPRZOWE MTS
Summary
Phosphorite conglomerates from the Pieprzowe Mts near Sandomierz (eastern part of the Holy Cross Mts) accompany the siltstone-sandy sediments that form interbeds in clayey and alum shales of the stage Paradoxides paradoxissimus of the Middle Cambrian. Sandstane pebbles with filmy phosphate cement are the main components of this conglomerates; there is also secondary content of phosphorite material, coming from clayey shales (Fig. 2). The sandstone matrix of the conglomerate as well as pebbles contain valves of hinge-less brachiopods Lingulella vistulae (Gurich).
Filmy cements that envelopes quartz grains and noted in the optical microscope, is of laminated colophan mass type. Only the images from electron microscope indicate nanostructures of apatite of columnar type and characteristic spherolitic structures (Figs. 3 -7). Intergranular enclaves contain spheric and discoidal forms of 0,3-2,0 μm in diameter that can be considered for the ones of bacterium origin. They form colonies and aggregates, 3-4 and more individuals each (Figs 9 -12). Similar bacterium features have been already noted in phosphorite deposits of the Neogene from Florida, Paleogene from northern Africa, Cenomanien from the Russia~ Platform and Cambrian from Karatau deposits.
The origin of the conglomerate from the Pieprzowe Mts is connected with perilittoral areas 'of the Middle Cambrian basin, subjected to occasional shallowing. Precipitation of phosphates probably occurred in the environment of intergranular waters in poorly diagenetic sediment and with active action of bacteria.
Summary
Phosphorite conglomerates from the Pieprzowe Mts near Sandomierz (eastern part of the Holy Cross Mts) accompany the siltstone-sandy sediments that form interbeds in clayey and alum shales of the stage Paradoxides paradoxissimus of the Middle Cambrian. Sandstane pebbles with filmy phosphate cement are the main components of this conglomerates; there is also secondary content of phosphorite material, coming from clayey shales (Fig. 2). The sandstone matrix of the conglomerate as well as pebbles contain valves of hinge-less brachiopods Lingulella vistulae (Gurich).
Filmy cements that envelopes quartz grains and noted in the optical microscope, is of laminated colophan mass type. Only the images from electron microscope indicate nanostructures of apatite of columnar type and characteristic spherolitic structures (Figs. 3 -7). Intergranular enclaves contain spheric and discoidal forms of 0,3-2,0 μm in diameter that can be considered for the ones of bacterium origin. They form colonies and aggregates, 3-4 and more individuals each (Figs 9 -12). Similar bacterium features have been already noted in phosphorite deposits of the Neogene from Florida, Paleogene from northern Africa, Cenomanien from the Russia~ Platform and Cambrian from Karatau deposits.
The origin of the conglomerate from the Pieprzowe Mts is connected with perilittoral areas 'of the Middle Cambrian basin, subjected to occasional shallowing. Precipitation of phosphates probably occurred in the environment of intergranular waters in poorly diagenetic sediment and with active action of bacteria.