1998

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Alphabetical by the first author's surname 

Note: the authors who wish to have here an English abstract of their short notes, are asked to submit the appropriate text of ca. 100 words (best via e-mail to akozl@geo.uw.edu.pl)

BAGIŃSKI, BOGUSŁAW
Institute of Geochemistry, Mineralogy and Petrography, Warsaw University al. Żwirki i Wigury 93, 02-089 Warszawa, Poland
CONTACT METAMORPHISM CONDITIONS IN THE ROCKS OF THE COVER OF THE KŁODZKO-ZŁOTY STOK INTRUSION
Archiwum Mineralogiczne v. LI, no. 1-2, p. 293-294, 1998
[Short note in Polish]
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BAKUN-CZUBAROW, NONNA 
Institute of Geological Sciences, Polish Academy of Sciences, ul. Twarda 51/55, 00-818 Warszawa, Poland
ILMENITE-BEARING ECLOGITES OF THE WEST SUDETES -- THEIR GEOCHEMISTRY AND MINERAL CHEMISTRY
Archiwum Mineralogiczne, v. LI no 1-2, p. 29-110, 1998

The paper presents new data on geochemistry and mineral chemistry of the ilmenite-bearing Sudetic eclogites which provide geochemical constraints on the geo-tectonic setting in which the igneous protoliths of these rocks were formed. Conditions and geodynamic regime of Variscan HP metamorphism the rocks underwent are also discussed. The ilmenite-bearing Sudetic eclogites outcrop on the slope of the Czemica Mountain within orthogneisses of Gierałtow unit in Orlica--Śnieżnik Dome (OSD) as well as within high-grade mica schists of Kamieniec Ząbkowicki in Fore-Sudetic Block (FSB). The igneous protoliths for the ilmenite-bearing Sudetic eclogites were tholeiites of ferrogabbroic chemical composition. The FSB eclogite magmatic protoliths may have been formed either at a slowly spreading oceanic ridge transected by a fracture zone or in a spreading centre of a marginal back-arc basin. The FSB eclogites display geochemical affinity to some volcanic and shallow level intrusive rocks of circum-Sowie Mountains ophiolites, particularly to the upper horizon rocks of the Slęża ophiolite, originated most likely in the environment of either narrow ocean or back-arc basin. Thus FSB eclogites represent most likely the HP upper part of a dismembered ophiolitic sequence. On the other hand, the OSD eclogites from the slope of the Czernica Mountain may have been originated at the expense of a camptonite-type lamprophyre within continental environment.
The ilmenite-bearing eclogites of the FSB display the following climax metamorphism mineral assemblage: Omp-Grt-Gln-Hbl-Qtz-Zo-Ilm-Rt-Pg-Phe-Ap-Zrn, whereas the appropriate assemblage for the OSD quartzless eclogite is mineral poorer: Omp-Grt-Hbl-Zo-Ilm-Rt-Ttn-Phe-Ap. The conditions of extreme metamorphism for the FSB eclogites are 570-610°C under P min = 13-15 kbar, whereas for the OSD eclogites they are higher: 730 +/-30°C under P min = 15-16 kbar. The FSB ilmenite-bearing ophiolitic eclogites are subduction related and display clockwise P--T trajectory of EBS-EC-EA-GS type. On the other hand, the OSD Czernica eclogites register continental type collisional event in eastern termination of the West Sudetes with EC-AM-EA-GS trajectory of the retrograde metamorphism.
Key words: ilmenite-bearing eclogites, glaucophane-bearing eclogites, Fe-Ti eclogites, mineral chemistry, P-T conditions of mineral equilibria, Sudetes, Bohemian Massif.
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BAKUN-CZUBAROW,  NONNA*; BRUECKNER, HANNES K.**; BLUSZTAJN, JERZY***
*Institute of Geological Sciences of the Polish Academy of Sciences, ul.Twarda 51/55, 00818 Warszawa, Poland; **Lamont-Doherty Earth Observatory of Columbia University, Palisades, NY 10964, USA; ***Woods Hole Oceanographic Institution, Woods Hole, MA 02543, USA
INTRAGRANULAR VARIABILITY OF GARNETS AND ITS GEODYNAMIC IMPLICATIONS: AN EXAMPLE OF THE GARNETS FROM PERIDOTITES OF SOWIE MTS AND NORWEGIAN CALEDONIDES
Archiwum Mineralogiczne v. LI, no. 1-2, p. 297-299, 1998
[Short note in Polish]
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JANECZEK, JANUSZ
Department of Geochemistry, Mineralogy and Petrography, Silesian University, ul. Będzińska 60, 41-200 Sosnowiec, Poland
SPHENE IN MONZODIORITE FROM KOŹMICE NEAR NIEMCZA, LOWER SILESIA
Archiwum Mineralogiczne v. LI, no. 1-2, p. 289-292, 1998
[Short note in Polish]
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JOZEFIAK, DARIUSZ 
Institute of Geological Sciences, University of Wroclaw, ul. Cybulskiego 30, 50-205 Wrocław, Poland
THE HISTORY OF METAMORPHISM OF THE KAMIENIEC ZĄBKOWICKI MICA SCHISTS (SUDETES, SW POLAND)
Archiwum Mineralogiczne, v. LI no 1-2, p. 213-244, 1998

Southern part of the Niemcza-Kamieniec Metamorphic Unit (Sudetes, SW Poland) is dominated by garnet-bearing mica schists, occurring as coarse- and fine-blastic varieties. Coarse-blastic schists are composed of quartz-muscovite lenses surrounded by muscovite-biotite layers. The fine-blastic schists are layered. They consist of quartz-muscovite and muscovite-biotite layers. The coarse-blastic schists contain more andalusite, plagioclase and chlorite than the fine-blastic ones. The later are richer in biotite and staurolite. The coarse-blastic schists contain fibrolite and relics of kyanite. Chloritoid inclusions occur in garnets from both the rocks. Muscovite and biotite form three morphological varieties in the coarse-grained schists (muscovite I, II, III and biotite I, II, III) and the two varieties in the fine blastic schists (muscovite I, II and biotite I, II).Chemical composition of minerals occurring in the coarse- and fine-blastic schists is different. Muscovite I and II from coarse-grained schists has more Si and R²⁺ and less Al^IV + Al^VI and Na than muscovite I and II from fine-blastic schists. Garnets from both the rocks show considerable differences in grossular and spessartine contents. Staurolite from the coarse-blastic schists contains less H⁺ and has higher sum of cations than that from the fine-blastic schists. Since the coarse- and fine-blastic schists have almost identical chemical composition, the differences in mineral chemistry suggest different metamorphic evolution of both the rocks. The peak of metamorphism in coarse-blastic schists was connected with crystallisation of garnet and fibrolite. They were formed during staurolite decomposition, which took place in temperatures 600-620°C under pressures 4-5 kbar (garnet-biotite-A₂SiO₅-quartz thermobarometer). During subsequent metamorphism garnet was decomposed and Muscovite III, biotite III, second generation of staurolite plus andalusite and plagioclase were formed. This took place in temperature lower than 585 +/- 30°C and under pressures 1-2 kbar (garnet-biotite-A₂SiO₅-quartz thermobarometer, samples with partly decomposed garnet). Chloritoid is the oldest mineral in the fine-blastic schists. Muscovite I, II and biotite I, II crystallised later, and were followed by garnet and, subsequently, by staurolite and andalusite. The maximum of metamorphism took place in temperatures 500-550°C under pressures 2-4 kbar (garnet-biotite-A₂SiO₅-quartz thermobarometer).
Key words: mica schists, metamorphic evolution. Lower Silesia, SW Poland.
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LORENC, MAREK W.
Department of Geology of the Sudetes, Institute of Geological Sciences, Polish Academy of Sciences, Podwale 75, 50-449 Wrocław, Poland
Rb-Sr ISOTOPIC STUDY OF THE INTRUSIVE ROCKS FROM THE NIEMCZA ZONE (LOWER SILESIA, POLAND)
Archiwum Mineralogiczne, v. LI no 1-2, p. 181-212, 1998

The Niemcza Zone intrusive rocks represent one cycle of Hercynian magmatic activity. They consist of two rock types. The fine-grained dioritic rocks lacking enclaves and any fabric are the most mafic member. The second type comprises deformed medium-grained porphyritic granitoids of variable mineral composition with numerous dark enclaves. Sharp contacts between both varieties occur in old quarries at Brodziszów and Koźmice. The mafic and the hybrid intermediate rocks from Przedborowa and Pilawa Górna, i.e. those with Rb/Sr values <0.18, probably derived from a contaminated tholeiitic magma. According to the graphic interpretation of the Rb-Sr isotopic data, they appear to have come from a source with a model initial ⁸⁷Sr/⁸⁶Sr ratio of about 0.7063. The calc-alkaline Koźmice granitoids are characterized by Rb/Sr values >0.18 and initial ⁸⁷Sr/⁸⁶Sr values of about 0.7075. The late-tectonic Kośmin granitoids, and their enclaves, probably derived from a crustal source with an initial ⁸⁷Sr/⁸⁶Sr ratio of about 0.7083. Isotopic data suggest that the rocks of the Niemcza Zone did clearly not derive from a single homogeneous source. Processes of igneous mixing and/or contamination may have operated at the source but it is also probable that this source was previously mixed.
Key words: Niemcza Zone, isotopic study, magma origin, hybrid rocks, granitoids.
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ŁYDKA, KAZIMIERZ*; MORYC, WŁADYSŁAW**
*Institute of Geochemistry, Mineralogy and Petrography, Warsaw University al. Żwirki i Wigury 93, 02-089 Warszawa, Poland; **Polish Geological Institute, 00-975 Warszawa, Rakowiecka 4, Poland
SEDIMENTARY ROCK TRANSFORMATIONS UNDER CONDITIONS OF DEEP BURIAL
Archiwum Mineralogiczne v. LI, no. 1-2, p. 295-296, 1998
[Short note in Polish]
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PUZIEWICZ, JACEK; RUDOLF, NATALIA
Institute of Geological Sciences, University of Wroclaw, ul. Cybulskiego 30, 50-205 Wroclaw, Poland
PETROGRAPHY AND ORIGIN OF THE LEUCOCRATIC TWO-MICA GNEISSES FROM THE DOBOSZOWICE METAMORPHIC UNIT (SUDETES, SW POLAND)
Archiwum Mineralogiczne, v. LI no 1-2, p. 153-164, 1998

Western and central parts of the Doboszowice Metamorphic Unit (Lower Silesia, NE Bohemian Massif) consist of leucocratic two-mica gneisses. The gneisses are structurally variable, but their chemical composition is constant. The content of normative quartz and feldspars exceeds 90%. Quartz, potassic feldspar and oligoclase are the main minerals of the gneisses, subordinate are micas, sparsely there occurs garnet. Apart of the grains exhibits magmatic features (normal zoning of plagioclase, biotite composition, content and zoning of titanium in muscovite, zoning of garnet). The composition and shape of the other grains were formed under post-magmatic conditions during deformation (deformational twinning ofplagioclase, deformational myrmekite and cross-hatched twinning of potassic feldspar, composition of a part of the micas). Leucocratic two-mica gneisses are a syntectonic granitic pluton emplaced at a depth of 11-18 km. The pluton crystallized and cooled during deformation. The latter process caused gneissification and metamorphism of the granite. Intense metamorphism ceased under the conditions typical of the low-temperature part of amphibolite facies,.but the traces of greenschist-facies metamorphism are also present in the rock. The accompanying deformation was due to "top to NNE" shearing.
Key words: syntectonic granite, pluton, deformation, gneiss.
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STĘPNIEWSKI, MARIAN*; SIEMIĄTKOWSKI, JACEK**; BORUCKI, JERZY***; RADLICZ, KRZYSZTOF****
*Polish Geological Institute, 00-975 Warszawa, Rakowiecka 4, Poland, **Polish Geological Institute, 53-122 Wrocław, Jaworowa 19, Poland, ***03-925 Warszawa, Peszteńska 3/24, Poland, ****00-850 Warszawa, Prosta 2/14, apt. 84, Poland
FALL, RECOVERY AND PRELIMINARY STUDY OF THE BASZKÓWKA METEORITE (POLAND)
Archiwum Mineralogiczne, v. LI no 1-2, p. 130-152, 1998

The meteorite fell on August 25, 1994, near the small village of Baszkówka, ca. 25 km south-west from the centre of Warszawa (Poland). The fall was observed by people living there, therefore the stone was found at once 25 cm under the surface of the soft cultivated soil. It was the not damaged, oriented stone of 15.5 kg, covered with a fusion crust decorated by numerous, radial regmaglypts. The meteorite is classified as L5 ordinary, unshocked (Sl) chondrite. The main silicate components of the meteorite are olivine (chrysolite; 20-25% Fa) and pyroxene (bronzite ca. 20% Fs). In addition to kamacite (alpha-Fe with ca. 5.5% Ni) and troilite, some rare grains of chromite and very rare native Cu grains were found.
Key words; meteorites, ordinary chondrites, mineral composition, Baszkówka.

Side view of the Baszkówka meteorite. The upper surface, covered with vitreous enamel (fusion crust) and deeply carved regmaglypts, was pointed in the flight direction. The molten material was floating on the surface from the vertex toward the edge of the stone and was dissipating in the atmosphere. One of few "frozen drops", remaining at the circumference of the stone, is visible at the lower right side of the meteorite. Lower surface is covered with dull-black fusion crust. Dimensions: horizontal  - 30 cm, vertical  - 18 cm.
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SZPILA, KAZIMIERZ*; BOJAKOWSKA, IZABELA**
*Institute of Geochemistry, Mineralogy and Petrography, Warsaw University al. Żwirki i Wigury 93, 02-089 Warszawa, Poland; **Polish Geological Institute, ul. Rakowiecka 4, 00-975 Warszawa, Poland
MERCURY IN BROWN COAL FROM THE TUROW COAL MINE (SOUTHWESTERN POLAND)
Archiwum Mineralogiczne v. LI, no. 1-2, p. 19-27, 1998

Euxinic environments rich in organic matter which lead to energetic raw materials concentration show favourable conditions for mercury enrichment. In brown coal deposits at Turów coal open mine the mercury content varies depending on type of coal and is 0.48 ppm in average. Many years of brown coal burning in electric plants in Turow region and adjacent parts of Bohemia and Germany may be a cause of increased mercury content in the environment. Because of toxic character of mercury its content near industrial plants burning natural combustibles should be systematically controlled.
Key words: Zittau basin, brown coal, mercury.
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WALENCZAK, ZYGMUNT; CIEŚLA, ANNA
Institute of Geochemistry, Mineralogy and Petrography of the Warsaw University, al. Żwirki i Wigury 93, 02-089 Warszawa, Poland
HYDROTHERMAL BLEACHING OF LIMESTONES FROM WOJCIESZOW (KACZAWA MTS, LOWER SILESIA)
Archiwum Mineralogiczne v. LI, no. 1-2, p. 149-159, 1998

Fine-dispersed admixtures of coal substance caused dark, at places even black colour of the Cambrian crystalline limestones from Wojcieszów. On the other hand, fissures in these limestones were filled by light-coloured carbonates and zones of bleached rock extended discordantly with respect to the primordial bedding of the limestones. Bleaching of the dark limestones were caused by reduction of the dispersed coal-type substance. The bleaching process developed incidentally due to an activity of the deep hydrothermal waters carrying very strong oxidisers that formed by radiolysis of water.
Key words: radiolytic decomposition of water, limestone bleaching, limestones from Wojcieszów, Kaczawa Mountains.
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WIEWIÓRA, ANDRZEJ
Institute of Geological Sciences, Polish Academy of Sciences, 00-818 Warszawa, ul. Twarda 51/55, Poland
Archiwum Mineralogiczne v. LI, no. 1-2, p. 300-301, 1998
FIRST DATA ON SUPERSTRUCTURE OF TALC AND PYROPHYLLITE
[Short note in Polish]
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WIEWIÓRA, ANDRZEJ; WILAMOWSKI, ANDRZEJ
Institute of Geological Sciences, Polish Academy of Sciences, 00-818 Warszawa, ul. Twarda 51/55, Poland
Archiwum Mineralogiczne v. LI, no. 1-2, p. 302-303, 1998
THE METHOD OF THE XRD EVALUATION OF THE CHEMICAL COMPOSITION OF CHLORITES
[Short note in English]
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WIEWIÓRA, ANDRZEJ*; TADATAKA HIDA**
*Institute of Geological Sciences, Polish Academy of Sciences, 00-818 Warszawa, ul. Twarda 51/55, Poland; **Shokozan Research Laboratory Co. Ltd., 4-588-1 Nishihon-machi, Shobara-shi Hiroshima, 727, Japan
PYROPHYLLITE SUPERSTRUCTURE DETERMINED BY XRD
Archiwum Mineralogiczne v. LI, no. 1-2, p. 111-130, 1998

SEM observation of the pyrophyllites from Nakamuraguchi and Takinotani mineral deposits showed typical particles morphology and sizes in the range of 0.1-1 micrometers in thickness and several micrometers in diameter. Chemical analyses conducted with WDS technique proved classical pyrophyllite composition, with minor admixture of Fe. By IR method, location of Fe³⁺ in octahedra has been confirmed. Structural analyses were performed by X-ray powder reflection diffractometry and transmission diffractometry with use of position sensitive detector PSD-120 on the powdered and non-powdered samples. Diffraction patterns recorded from powdered samples displayed all the sharp basal and subfamily diffractions and strongly blurred polytypic diffractions indicating a significant structural disorder. Diffraction patterns recorded from a non-powdered rod-like preparation displayed in addition basal reflections of a series d_00l . l = 18.4 . They are clearly due to the superstructure, where spacing d₀₀₁ equals double spacing of pyrophyllite. The experimental patterns were compared to the simulated ones from the structure data of the two-layer mono-clinic and one-layer triclinic polytypes, with unit cell parameters refined from the experimental pattern of the Nakamuraguchi pyrophyllite. The structural model incorporating alternation of pyrophyllite layers with slightly different electron densities was used to simulate diffraction pattern characteristic of the superstructure. The pattern displayed d_00l . l = 18.4 series of basal reflections with the correct relative intensities. It showed a reflection 111 at 4.16 of similar intensity to that one in the experimental pattern. The best match to the experimental diffractograms of the pyrophyllites from Nakamuraguchi and Takinotani deposits was obtained by a simulated diffractogram for a structure composed of superstructure (70%), monoclinic structure (25%) and triclinic structure (5%). Evidently, the studied pyrophyllites have a complex composition, in which triclinic one-layer per unit cell domains and layer pairing play important roles. In results, the domains with two layer arrangement may be created there where all layers have similar composition or every second layer has different electron density. In that latter case a superstructure is observed.
Key words: pyrophyllite, superstructure, experimental diffractograms, simulated diffractograms.
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WILAMOWSKI, ANDRZEJ
Institute of Geological Sciences, Polish Academy of Sciences, ul. Twarda 51/55, 00-818 Warszawa, Poland
GEOTECTONIC ENVIRONMENT OF THE KARKONOSZE AND TATRA GRANITE INTRUSIONS BASED ON GEOCHEMICAL DATA
Archiwum Mineralogiczne v. LI, no. 1-2, p. 261-271, 1998

Geochemical data of granite samples allow to ascribe Karkonosze and Tatra massifs to different tectonic environments. One may suppose, that the parent magma of the Karkonosze granite derived from the upper part of the crust, whereas the parent magma of the Tatra granite from the lower one. The Tatra granite was emplaced before collision of plates in the subduction regime and could be related to the volcanic arc granites. The intrusion of the Karkonosze granite was post-collisional, late-orogenic.
Key words: Karkonosze granite, Tatra granite, geochemistry, geotectonic environment, discrimination diagrams.
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WŁODYKA, ROMAN
Department of Geochemistry, Mineralogy and Petrography, Silesian University, ul. Będzińska 60, 41-200 Sosnowiec, Poland
THE MECHANISM OF THERMAL DECREPITATION OF FLUID INCLUSIONS IN CALCITE, BARITE AND ANALCITE
Archiwum Mineralogiczne v. LI, no. 1-2, p. 165-180, 1998

The process of the inclusion decrepitation was investigated in the specimens of calcite, barite and analcite by the use of graphic record of the acoustic emission appearing due to inclusion cracking on the mineral heating. Simultaneously, the acoustic emission was recorded on the magnetic tape and next analysed by means of the sound spectrum analyser FFT type 2034. All the investigated minerals yielded bimodal homogenization temperature (Th) histograms and unimodal decrepitometric curves. Temperatures of the beginning of the mass inclusion decrepitation (Td) were close to the upper range of the Th variation for primary inclusions and only these temperatures could be used for thermometric studies of the minerals. The obtained results were interpreted on the basis of the Griffith's theory of failure. The acoustic emission of the sample recorded versus sample temperature, that was the measure of the elastic energy excess of the stress fields around the inclusions, could be visualized as unimodal Gauss-type curves. These curves did not reflect inclusion populations present in the minerals, but they were dependent on the kinetics of the process of the thermic disintegration of the samples. As it was evidenced by acoustic emission studies, the inclusion decrepitation process developed with the changing thickness of the inclusion walls due to formation of new surfaces along the cleavage planes.
Key-words: fluid inclusions, decrepitation method, calcite, barite, analcite.
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WŁODYKA, ROMAN*; KAPUSTA, JOANNA**; GALUSKIN, EUGENIY*
*Department of Geochemistry, Mineralogy and Petrology, Silesian University, ul. Będzińska 60, 41-200 Sosnowiec, Poland; **Department of Solid State Physics, Institute of Physics, Silesian University, ul. Uniwersytecka 4, 40-007 Katowice, Poland
DATOLITE FROM THE ENVIRONS OF CIESZYN AND BIELSKO-BIAŁA IN THE POLISH CARPATHIANS (THE TYPE AREA OF THE TESCHENITE ASSOCIATION)
Archiwum Mineralogiczne v. LI, no. 1-2, p. 273-287, 1998

For the first time a datolite occurrence in the type area of the teschenite association in the Polish Outer Carpathians has been discovered. Datolite has been found in the lower contact zone of the teschenite sill at Puńców near Cieszyn and in the olivine glimmerite sill at Miedzyrzecze Górne near Bielsko-Biała. Detailed investigations of the datolite crystals from Miedzyrzecze made possible to distinguish their three morphological types: pseudobipyramidal, prismatic and pinacoidal. The characteristic feature of the datolite morphology is a "framed" habitus of planes of the simple crystallographic form {052}. Chemical composition of datolite is very close to its theoretical constitution, among trace elements barium and strontium predominate. Datolite has a monoclinic symmetry with the following lattice parameters: a = 4.8316(5) , b = 7.6054(2) , c = 9.6287(7) and (3 = 90.143(3)°. The crystal structure of datolite has been refined by the Rietveld profile method. Refinement to an Rp of 8.15%, as compared with the results of Pant and Cruickshank (1967), led to the maximum change due to boron atom. Datolite crystallised in labile conditions of the open system in temperature about 200°C from the hydrothermal solutions with low activity of H₂CO₃.
Key-words: datolite: crystal structure, morphology, composition.
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