1994

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Alphabetical by the first author's surname 

BAKUN-CZUBAROW, NONNA
Institute of Geological Sciences of the Polish Academy of Sciences, al. Żwirki i Wigury 93, 02-089 Warszawa, Poland
ECLOGITE AND GRANULITE SERIES IN WEST SUDETES 
Archiwum Mineralogiczne, v. L no 2, p. 141-142, 1994
[Short note in Polish]
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BISHADY, AHMED M.; ATTIA, MOHAMED S.; HATHOUT, MOHAMED H.; OMAR, MOHAMED I. B.

Department of Geology, Faculty of Science, Menoufia University, Shabin El-kom, Egypt

PETROGRAPHY AND GEOCHEMISTRY OF THE OPHIOLITIC MELANGE IN THE AREA OF WADI LAWI AND WADI LAWAWI, SOUTH OF EASTERN DESERT, EGYPT
Archiwum Mineralogiczne, v. L no 2, p. 69-96, 1994

Wadi Lawi and Wadi Lawawi melange represent a member of an ophiolitic sequence, located to the south of the Eastern Desert of Egypt. The melange matrix consists mainly of quartz-tremolite-actinolite schists, talc-chlorite-tremolite-actinolite schists, tremolite-actinolite-chlorite schists and talc rock. The graphite-bearing schists are commonly associated with the melange schists and vary to quartz-plagioclase-actinolite-graphite schist, and tremolite-actinolite-talc-chlorite-graphite schist. The rock fragments included in the schistose matrix are represented mainly by argillites and greywackes, volcanic rocks (quartz-andesites) and monzodiorites. The major and trace elements compositions in the Wadi Lawi and Wadi Lawawi rocks, through the correlation with average chemical composition of igneous and sedimentary rocks, and due to an important role played by carbon, suggest that:

1. The schists represent metamorphosed ultrabasic igneous rocks, rich in magnesium, related to abyssal tholeiites, and formed in an oceanic island arc environment (OIA).

2. The rock fragments are mostly related to basic tholeiitic rocks, formed in a continental island arc environment (CIA).

3. Wadi Lawi and Wadi Lawawi ophiolites belong to the class II ophiolites of Miyashiro (1975).

Key words: ophiolitic melange, metamorphic schists, tholeiitic rocks. Eastern Desert, Egypt.
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BORKOWSKA, MARIA
Institute of Geological Sciences of the Polish Academy of Sciences, al. Żwirki i Wigury 93, 02-089 Warszawa, Poland
GNEISSES FROM THE METAMORPHIC COMPLEX OF ŚNIEŻNIK IN SUDETES, AS CHARACTERISED BY MINERALOGICAL AND GEOCHEMICAL STUDIES 
Archiwum Mineralogiczne, v. L no 2, p. 14-145, 1994
[Short note in Polish]
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BYLINA, PAWEŁ
Institute of Geological Sciences of the Polish Academy of Sciences, al. Żwirki i Wigury 93, 02-089 Warszawa, Poland
INFRARED ABSORPTION SPECTRA OF MICAS AND VERMICULITES FROM WIRY, LOWER SILESIA
Archiwum Mineralogiczne, v. L no 1, p. 141, 1994
[Short note in Polish]
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DUBIŃSKA, ELŻBIETA
Institute of Geochemistry, Mineralogy and Petrography of the Warsaw University, al. Żwirki i Wigury 93, 02-089 Warszawa, Poland
GEOCHEMISTRY OF TRACE ELEMENTS IN CALC-SILICATE ROCKS FROM SERPENTINITES BORDERING SOWIE MTS BLOCK
Archiwum Mineralogiczne, v. L no 2, p. 147, 1994
[Short note in Polish]
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GAWĘDA, ALEKSANDRA
Department of Earth Sciences, University of Silesia, ul. Będzińska 60, 41-200 Sosnowiec, Poland
GRAPHIC GRANITES FROM THE UPPER KOŚCIELISKA VALLEY IN WESTERN TATRA MTS (S POLAND)
Archiwum Mineralogiczne, v. L no 1, p. 33-47, 1994

In the Western Tatra Mts graphic granites are represented by graphic zones in the pegmatites, as quartz intergrowths in aplitic zones and as independent segregations in crystalline rocks. There are distinguished four morphological types of graphic texture. The differences in the shape of ichthyoglypts are connected with different conditions of crystallisation (planar or cellular growth). Undercooling and slow diffusion of chemical components caused oscillation in quartz saturation at the melt-solid interface. As far as graphic zones in pegmatites are part of the evolution of these rocks, the independent ''bubbles" of graphic granites could be interpreted as squeezed, dispersed portions of granitic melt, crystallised in situ. Their small size inhibited the fractionation process. Undercooling, caused by local geologic conditions (e.g. strain field) created favourable conditions for crystallisation of the graphic texture.
Key words: graphic intergrowths, nonequilibrium growth, undercooling, cellular growth.  
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HOLCER, ZYGMUNT*; PAWLIKOWSKI, MACIEJ**
*Collector of mineralised wood, ul. Matejki 1/4, 31-157 Kraków, Poland; **Institute of Mineralogy, Raw Materials and Geochemistry of Environment, University of Mining and Metallurgy, Al. Mickiewicza 30, 30-059 Kraków, Poland
MINERALOGICAL INVESTIGATIONS OF SILICIFIED WOOD AND THE KWACZAŁA ARCOSE (S POLAND)
Archiwum Mineralogiczne, v. L no 1, p. 69-88, 1994

Mineralogical investigations have been executed of the silicified wood of Dadoxylon from the Kwaczała arcose of Upper Carboniferous age. Mineralised zones have been encountered around the silicified wood. The studies have revealed that the decaying tree trunk reacted with the surrounding rock causing decay of feldspars and biotite around the trunk. This process was associated with the origin of secondary kaolinite, Fe-Mn oxides and drawing potassium off the tree trunk surrounding. Interpretation of these processes in the Carboniferous conditions suggests considerable influence of organic substances onto both the rocks concurring with the coal seams and the rocks that surround the Upper Silesian Coal Basin.
Key words: Carboniferous, mineralisation of wood.
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ILNICKI, SŁAWOMIR
Institute of Geochemistry, Mineralogy and Petrography, Warsaw University, al. Zwirki i Wigury 93, 02-089 Warszawa, Poland
PRIMARY AND SECONDARY PLAGIOCLASES FROM APLITE NEAR PASZOWICE (STRZEGOM-SOBÓTKA MASSIF, SW POLAND)
Archiwum Mineralogiczne, v. L no 2, p. 55-68, 1994

The investigated rock contains two generations of plagioclase: 0-6% An and 11-24% An (for the zoned ones: 12-20% to 5-11% An). On the basis of the (Si, Al)-ordering and position of the pericline composition plane (PCP) expressed by the angle s_pcp it was stated that pure and almost pure albites are actually pseudomorphs after oligoclase 13-26% An. Some of pseudomorphs after their original composition reconstruction yielded primary zoning (core: 11-20% An and more acidic rim: 4-11% An). It corresponds with anorthite content observed at the other generation of plagioclase considered to be the primary one.
Key words: aplite, pericline twinning, rhombic section, albitisation, primary composition of secondary albite.
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KÜHNEL, RADKO
International Institute for Aerospace Survey and Earth Sciences, ITC, Kanaalweg 3, 2628 EB Delft, the Netherlands
CLAY MINERALS FORMATION AT DIFFERENT STAGES OF ALTERATION OF VOLCANIC ROCKS 
Archiwum Mineralogiczne, v. L no 2, p. 146, 1994
[Short note in English]
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MAJEROWICZ, ALFRED
Institute of Geological Sciences, University of Wroclaw, ul. Cybulskiego 30, 50-205 Wroclaw, Poland
TEXTURAL FEATURES AND SYMPTOMS OF OCEAN FLOOR METAMORPHISM IN THE TOP PART OF THE ŚLĘŻA OPHIOLITE (SW POLAND)
Archiwum Mineralogiczne, v. L no 2, p. 97-139, 1994

In the present paper the results of studies conducted in the eastern part of the Ślęża ophiolite have been presented. The following rocks are exposed in the area of research: metabasalts, metadiabases and metagabbros. The rocks occur in form of either lava covers with fragments of dykes or top parts of the multiphase intrusions and, possibly, top parts of magma chambers as well as deeper parts of the gabbro member with rooted dykes. The multiphase ascension of the tholeiitic magma and possible assimilation of earlier cooled magma parts at different depths resulted in the textural differentiation of the rocks. Among the aphanitic fine-grained textures there occur those blastoporphyric or blastoglomeroporphyric ones, while ophitic, sub-ophitic, diabasic and interstitial ones are present among medium or coarse grained textures. Those features correspond in total to the "roof assemblage" (Pedersen 1986) described in detail in the Norwegian ophiolites. Mineral assemblages were analysed petrographically by means of optical methods. Chemical composition of the rocks discussed was analysed with a use of the microprobe. The results of the analyses have proved that the rocks of the ophiolite zone were altered due to the hydrothermal ocean floor metamorphism, which is common in the upper ophiolite parts and described by many authors. During spreading of the rock masses the marine waters penetrated the cooling and loosening their compactness complexes to limited depths, what resulted in metamorphic transformation together with the temperature decrease. Different hornblende modifications were formed from pyroxenes in the temperature interval of 750-550°C, being further changed into the actinolite hornblende and into the amphiboles from the actinolite group below 450°C. Cooling below about 300°C resulted in chlorite and minerals from the epidote group formation. Primary basic plagioclases changed their composition into more acid ones, even reaching albite. The alterations discussed occurred in the range of greenstone facies and the lower part of the amphibolite facies. The mineral assemblages formed in different intervals are present in the rocks partly as a mosaic, partly as a chaotic disorder and point to a lack of the facies equilibrium, the fact observed both in small samples and standard thin sections.
Key words: ocean floor spreading, rift, sheeted dykes, rooted dykes, roof assemblage, mush xenoliths, ocean floor metamorphism, mineral disequilibrium.  
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MAKAŁA, AGNIESZKA
Institute of Geochemistry, Mineralogy and Petrography, Warsaw University, al. Zwirki i Wigury 93, 02-089 Warszawa, Poland
GARNET-LAYER SILICATES PARAGENESES OF METAPELITES FROM STARA KAMIENICA CHAIN, WESTERN SUDETES
Archiwum Mineralogiczne, v. L no 2, p. 31-54, 1994

The paper presents the results of the geochemical and mineralogical research performed on the metapelite of the Stara Kamienica Chain, Izera Hills. The garnet-layer silicates parageneses was also considered to be appropriate for attempts of the metamorphism temperature determination for the schists formation from garnet/biotite thermometer by Ferry & Spear (1978). A detailed microprobe analysis of the chemical composition allowed identification and description of margarite, a brittle calcium mica occurring in this rock.
Key words: Stara Kamienica, Izera Hills, metapelite, garnet, margarite., geothermometer  

Typical mode of occurrence of margarite in the Stara Kamienica schists; transmitted light, crossed polars.

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MIRONOV, VASILIY; ANTONYUK, BORIS
Institute "Yakutniproalmaz", Lenin St. 39, 678170 Mirnyi, Yakutia, Russia
DISTRIBUTION OF THE LUMINESCENT CENTRES IN YAKUTIAN DIAMONDS
Archiwum Mineralogiczne, v. L no 2, p. 3-12, 1994

The authors present the laser-luminescence tomography method (LLT) of the revealing of the crystal zoning with use of a diamond selection collected in the Malobotuobinskoe field. This non-destructive method yields the distribution of the luminescent centres in the crystal volume, usually arranged in zones formed during a sequence of the crystal growth stages. "Phantoms" inside crystals, i.e. luminescent outlines of the growth zones, even from the earliest growth stages onwards, may suggest interesting information on diamond crystallisation conditions changes in the parent rock matrix. The method has been developed for the purposes of the diamond classification for both primary kimberlite and secondary placer deposits in the Mirnyi region.
Key words: diamond internal structure, laser-luminescence tomography.
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NEJBERT, KRZYSZTOF*; WISZNIEWSKA, JANINA**
*Warsaw University, Institute of Geology, al. Żwirki i Wigury 93, 02-089 Warszawa, Poland; **Polish Geological Institute, ul. Rakowiecka 4, 00-975 Warszawa, Poland
THE ORE MINERALIZATION IN THE JEZIORO OKRĄGŁE REGION, SUWAŁKI ANORTHOSITE MASSIF (NE POLAND)
Archiwum Mineralogiczne, v. L no 1, p. 13-32, 1994

The paper presents results of the mineralogical and chemical examinations of the ores occurring in the border zone of the anorthosite Suwałki intrusion at the Jezioro Okrągłe region. The ores are of the injective type, similar to the youngest type of ores found within the adjacent deposits of Krzemianka, Udryń and Jeleniewo. The ores in the Jezioro Okrągłe region intruded as the ore rnelt, following the complete crystallisation of anorthosite. The residual ore melt contained dispersed droplets of exsoluted sulphide melt. The exsoluted drops of the sulphide rnelt formed sulphide aggregates built of pyrrhotite, pentlandite, chalcopyrite and cubanite. The ore melt was rich in titanium, vanadium, chromium, magnesium and aluminium, which were trapped within the structure of titanomagnetite due to spontaneous crystallisation. The textural and composition differences of products of the titanomagnetite disintegration in the thick ore zones and in the small bodies within anorthosites have occurred due to different oxygen fugacity (fO₂) during the crystallisation of the ore melt, and transformations of the crystallised ores at the deuteric stage.
Key words: Suwalki massif, anorthosite, Fe-Ti-V ores, titanomagnetites, genesis.
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PARAFINIUK, JAN
Institute of Geochemistry, Mineralogy and Petrography of the Warsaw University, al. Żwirki i Wigury 93, 02-089 Warszawa, Poland
SULPHATE MONERALS FROM THE WEATHERING ZONE OF THE PYRITE-BEARING SCHISTS AT WIEŚCISZOWICE (RUDAWY JANOWICKIE MTS)
Archiwum Mineralogiczne, v. L no 1, p. 140, 1994
[Short note in Polish]
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PUZIEWICZ, JACEK
Institute of Geological Sciences, University of Wroclaw, ul. Cybulskiego 30, 50-205 Wroclaw, Poland
TITANIUM CONTENT IN BIOTITE FROM GRANITIC ROCKS AS AN INDICATOR OF MAGMA CRYSTALLISATION CONDITIONS : The study of biotite from metaluminous granitoids of the Strzegom-Sobotka massif (Poland)
Archiwum Mineralogiczne, v. L no 1, p. 89-136, 1994

Biotite occurring in metaluminous granitoids of the Strzegom-Sobotka massif (Sudetes, SW Poland) exhibits zoning in titanium that decreases from centres towards margins. The zoning is due to temperature and oxygen fugacity decrease during crystallization, and is resistent to post-magmatic alteration. Thus, biotite is potentially a useful geothermometer and oxygen geobarometer for granitic rocks.
Key words: biotite, titanium, granite, conditions of magma crystallisation.
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STĘPISIEWICZ, MAREK
Institute of Geochemistry, Mineralogy and Petrography of the Warsaw University, al. Żwirki i Wigury 93, 02-089 Warszawa, Poland
GEOCHEMICAL AND MINERALOGICAL PROBLEMS OF THE ROCKS ASSOCIATED WITH BROWN COAL IN THE DEPOSITS "TURÓW" AND "BEŁCHATÓW" 
Archiwum Mineralogiczne, v. L no 2, p. 143, 1994
[Short note in Polish]
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SZPILA, KAZIMIERZ; STĘPISIEWICZ, MAREK; BARCZUK,ANDRZEJ
Institute of Geochemistry, Mineralogy and Petrography of the Warsaw University, al. Żwirki i Wigury 93, 02-089 Warszawa, Poland
THE BLEACHED BASALTOID WEATHERING WASTE FROM THE ZITTAU BASIN (SW POLAND)
Archiwum Mineralogiczne, v. L no 1, p. 49-67, 1994

The Zittau basin is filled up with the Miocene sediments containing brown coal, and its basement is built of strongly weathered crystalline rocks. The basaltoid weathering waste has a kaolinite-montmorillonite composition with gibbsite inserts at its top. Locally this weathering waste has completely been stripped of iron and other elements characteristic of the parent basic rocks. The bleaching process of the weathering waste mainly composed of kaolinite, had place at low pH and Eh, caused by the presence of considerable amounts of organic matter. Favourable climate and proper drainage caused, that in Miocene, at the Zittau basin weathering was very intense and full hydrolysis of silicates, i.e. lateritisation of basaltoids took place.
Key words: Zittau basin, weathering o f basaltoids, kaolinite, leaching of iron.
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SZPILA, KAZIMIERZ
Institute of Geochemistry, Mineralogy and Petrography of the Warsaw University, al. Żwirki i Wigury 93, 02-089 Warszawa, Poland
THE PROBLEMS OF BASALTOID WEATHERING
Archiwum Mineralogiczne, v. L no 1, p. 139, 1994
[Short note in Polish]
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SZYMANSKI, ANDRZEJ
Chemical Faculty, Warsaw University of Technology, ul. Koszykowa 75, 00-622 Warszawa & A. Szymanski & Co., Ltd. -- Technical Diamonds Manufacture. ul. Skrzetuskiego 15, 05-092 Lomianki, Poland
GEOCHEMICAL CONDITIONS OF DIAMOND CRYSTALLIZATION IN HYDROTHERMAL PROCESSES
Archiwum Mineralogiczne, v. L no 2, p. 13-30, 1994

Based on the data presented in fragments earlier, own experience and petrological knowledge, the pneumatolytic-hydrothermal environment as potential source of a diamond growing in the Earth's crust is discussed.
Key words: diamond hydrogenesis, diamond hydrosynthesis, diamond overgrowth on crystal nucleus, embryocrystallites and seed crystals.
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SZYMANSKI, ANDRZEJ
Warsaw University of Technology, Faculty of Chemistry, ul. Koszykowa 75, 00-622 Warszawa, Poland
STORY ON THE "CROSS OF ASIA" FANCY YELLOW RADIANT CUT DIAMOND [Short note in English]
Archiwum Mineralogiczne, v. L no 1, p. 137-138, 1994

The stone examined by me on October 12, 1993, is the fifteenth diamond stone on the Gems and Gemmology (GIA) list of clearly yellow coloured diamonds. Its colour is called "fancy yellow". The play of colours on the top stone table create outline of a Maltese cross - that is a source of its name "Cross of Asia". The stone was found in Jagerfountain mine (South Africa) in 1902. Raw weight of the stone was 280 ct (56 g). At first diamond was cut to 142 ct, and next the cut was three times changed to 112 ct, 109.28 ct and finally 79.12 ct for elimination of all faults. Really that is now a fancy Radiant Cut (rectangular shape and cut corners) flawless (IF) brilliant, with fancy yellow natural colour, very good polish and symmetry, with weight of 79.12 carats and size of 28.67 x 22.21 x 15.77 mm. The brilliant fluorescence was determined as faint yellow natural diamond by GIA (Santa Monica, USA) - Grading Report No. 1 233 950.

Cut diamond "Cross of Asia".

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