2000

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Alphabetical by the first author's surname 

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KOVALISHIN,  ZENON; KALYUZHNYI, VOLODIMIR; NAUMKO, IGOR
Institute of Geology and Geochemistry of Mineral Fuels of the Ukrainian Academy of Sciences, Naukova str. 3a. Lviv, Ukraine
PHYSICO-CHEMICAL STATE OF MINERAL-FORMING FLUIDS DURING CRYSTALLIZATION OF THE VOLHYN CHAMBER PEGMATITES, UKRAINE
Archiwum Mineralogiczne v. 53, nos. 1-2, p. 133-136, 2000

Eleven generations of fluid inclusions were distinguished in pegmatitic quartz, for which the physico-chemical characteristics were documented. The results of the homogenization temperature measurements of inclusions in quartz indicated that temperature of the mineral-forming fluid decreased from ca. 600°C to 150-140°C. The performed studies revealed two periods of the temperature increase: from 360 to 500°C and afterwards from 230 to 290°C. Condensation of the pneumatolytic solutions into hydrothermal ones was recognized for the temperatures of 400 to 385°C. This condensation was accompanied by periodical heterogeneity of the mineral-forming fluid i.e. its vapour and liquid equilibrium state. The pressure varied from 80-70 MPa to 25—20 MPa, as inferred from fluid inclusions. The determinations of pH of liquid in individual inclusions evidenced five alternating acid and alkaline stages, which were called the first acid, the first alkaline, the second acid, the second alkaline and the third acid stage. Certain populations of the inclusions in minerals bear liquid carbon dioxide. 
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ŁYDKA,  KAZIMIERZ*; MORYC, WŁADYSŁAW**
*Institute of Geochemistry, Mineralogy and Petrography of the Warsaw University, al. Żwirki i Wigury 93, 02-089 Warszawa, Poland
**Geological Bureau "Geonafta" Warsaw-Cracow, 31-503 Kraków, ul. Lubicz 24, Poland
TRANSFORMATION OF DEEP-BURIED SEDIMENTARY ROCKS FROM KUZMINA AND CZUDEC (SE POLAND)
Archiwum Mineralogiczne v. 53, nos. 1-2, p. 25-60, 2000

Petrological investigations were carried out on rocks from the Skole Unit of the Carpathian flysch, as well as on Miocene, probably older Tertiary, Lower Carboniferous and Precambrian basement rocks. Samples were taken from deep boreholes Kuzmina-1 and Czudec-1 (Fig. 1). The Kuzmina-1 borehole is, to date, the deepest in Poland (7541 m). The Czudec-1 borehole reaches 4793 m; it penetrates through the Carpathian flysch to a substantially different geological profile below (Fig. 2). The deepest horizons penetrated by the borehole Kuzmina-1 are Precambrian rocks that have undergone multiphase changes. The earliest changes are marked by the existence of thin quartz veins associated to brittle fracture. Next, there occurred the blastesis of chlorites. The chlorite crystaloblasts penetrate the quartz veins and — in some places — fill the entire vein making its walls indistinct in relation to the surrounding rock mass. The blastesis of chlorites took place at about 350°C. The Precambrian rocks show later ductile deformations represented by flexure-like foldings combined with transversal reorientation and crenulation of flaky minerals. The chlorite crystaloblastesis has been exposed in places to higher temperatures recorded by the appearance of phengite intergrowths within larger chlorite crystaloblasts. The Carboniferous rocks in the deepest part of the Czudec-1 borehole show a high degree of diagenesis but without traces of anchimetamorphism.
   The autochthonous Miocene sediments, overlying the Precambrian rocks in the Kuzmina-1 borehole, are rich in mixed-layer minerals illite-smectite. The abundance of these minerals shows that the sediments were transformed under conditions of weak diagenesis. It should be pointed out here that these rocks are buried over 7300 m, without traces of distinct secondary transformations.
The flysch rocks representing the oldest deposits of the Skole Unit (Upper Cretaceous) are marly rocks with a variable proportion of carbonate minerals and clayey-arenaceous components. Mixed-layer minerals dominate among the clayey components; this suggests a low degree of diagenesis, which supports the potential of the studied rocks as oil- and gas-bearing horizons. 
Key words: flysch, flysch basement, Carboniferous, Precambrian, post-deposit transformations.
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MAJEROWICZ,  ALFRED
Institute of Geological Sciences, University of Wrocław ul. Cybulskiego 30, 50-205 Wrocław, Poland
SOME REMARKS ON THE ILMENITE CONCENTRATION IN THE SLEZA OPHIOLITE IN THE LIGHT OF PETROLOGICAL STUDIES
Archiwum Mineralogiczne v. 53, nos. 1-2, p. 61-83, 2000

Ilmenite concentrations in basic members of the eastern part of the Sleza ophiolite are discussed on the basis of the hitherto conducted petrological studies and of a comparison with the Solund-Stavfjord ophiolites studied by the Norwegian authors (Furnes et al. 1992). These members comprise comagmatic metagabbros, metadolerites and metabasalts. Apart from the detailed field analysis as well as interpretation of the chemical data, a behaviour of such elements as: Ti, Zr, Cr and Ni has been followed. Similarly to P, Y, Nb and HREE, these elements are least mobile in low- or partly medium-grade metamorphism of the sea floor, which affected the basic members of the Sleza massif. The tholeiitic magmas melted in about 20 % could migrate upwards to a bigger magma chamber in the open system. The harzburgite dominating in the ultramafic member of the Sleza ophiolite represents the residuum after the tholeiitic magmas. On their way upwards, the magmas could be modified in the smaller chambers resulting in the Fe and Ti-poor magma as well as a fraction rich in these elements. That last one gave the origin of ilmenite accumulations in the basic Sleza rocks, both in the plutonic gabbro and in volcanic basalts as well as in hypabyssal dolerites.
Key words: ophiolite, ocean environment, MORB, ilmenite mineralization, magma chambers, magmas poor and rich in Ti.
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RAABE, JERZY*; SAŁACIŃSKI, RYSZARD**
*Warsaw Polytechnical University, Warszawa, Poland
**Institute of Geology of the Warsaw University, al. Żwirki i Wigury 93, 02-089 Warszawa, Poland
ANDRZEJ MARIA SZYMAŃSKI 1934-2000
Archiwum Mineralogiczne v. 53, nos. 1-2, p. 3-24, 2000

An obituary.

WIERZCHOŁOWSKI, BOGUMIŁ
Institute of Geochemistry, Mineralogy and Petrography of the Warsaw University, al. Żwirki i Wigury 93, 02-089 Warszawa, Poland
LAMPROPHYRES FROM LĄDEK ZDRÓJ
Archiwum Mineralogiczne v. 53, nos. 1-2, p. 85-108, 2000

Lamprophyres which occur as fine veins in metamorphic rocks north of Ladek Zdroj were petrologically studied. Apart from the short petrological characteristics, chemical features of the rocks (main and trace elements) and of the minerals (main elements) have been presented. Amphiboles from the lamprophyres have a composition of pargasite and magnesio-hastingsite;
in clinopyroxenes, the ferrosalite member (% Fe) constitutes about 10 %, wollastonite is predominant over clinoenstatite. The lamprophyres from Ladek Zdroj were compared with those calc-alkaline ones of Rock (1991) as well as with the lamprophyres from southern Scotland and Ireland. It has been stated that the lamprophyres of Ladek Zdroj are spessartites. Their high magnesium number (mg) and relatively high content of Cr and Ni point to the formation from primary melts of the mantle origin.
Key words: lamprophyres: spessartites, vogesites, appinites.
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WŁODYKA, ROMAN; KARWOWSKI, ŁUKASZ
Faculty of Earth Sciences, Silesian University, Będzińska 60, 41-200 Sosnowiec, Poland
PEROVSKITE FROM THE MIĘDZYRZECZE SILL NEAR BIELSKO-BIALA IN THE POLISH CARPATHIANS (THE TYPE AREA OF THE TESCHENITE ASSOCIATION)
Archiwum Mineralogiczne v. 53, nos. 1-2, p. 109-131, 2000

For the first time perovskite has been observed in the western part of the Polish Flysch Carpathians, in the olivine glimmerite sill of the Bielsko-Biala vicinity. Perovskite and titaniferous magnetite belong to the latest minerals, filling the interstices between diopside and phlogopite. Detailed investigations: chemical and thermal analysis, X-ray diffraction as well as infrared and gamma spectroscopy, indicated that the studied perovskite is almost pure CaTiO3 (perovskite sensu stricto) containing only 2.60 to 4.20 wt. % REE2O3, 2.40 to 3.60 wt. % Nb2O5, 0.40 to 1.20 wt. % Fe2O3 and 0.80 to 1.10 wt. % Na2O. The unit cell parameters and tilt angle of the (Ti,Nb,Fe)O6 octahedra are very similar to those typical of the perovskite specimens from other alkaline ultrabasic complexes. Total homogenization of several melt inclusions was achieved at about 1000°C; trapped phases (probably pyrrhotite or chalcopyrite) did not dissolve in the melt inclusion filling. The observed formation of titanite or titaniferous garnets replacing perovskite was controlled by a low leach rate of calcium from perovskite structure and a high activity of SiO2 in hydrothermal fluids. The leaching of Nb and LREE elements, stimulated by perovskite fracturing, was caused by CO2-bearing fluids.
Key-words: perovskite, rare earth elements, melt inclusions, glimmerite, teschenite province, Carpathians, Poland.

Fig. 4. Primary melt inclusions in euhedral growth zone of perovskite from the Miedzyrzecze sill.	Fig. 5. The twin system [101] in perovskite from the Miedzyrzecze sill.

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