Temat: petrography - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Relation between the petrographic and chemical properties of weakly reduced and reduced coals of donets basin
Autorzy:: Butuzova, L.
Marinov, S.
Matsenko, G.
Skirtochenko, S.
Turchanina, O.
Isajeva, L.
Krzton, A.
Powiązania:: https://bibliotekanauki.pl/articles/1204910.pdf
Data publikacji:: 2002
Wydawca:: Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:: coal
vitrinite
petrography
Donets Basin
Opis:: Low-rank coals of the same rank level but of different genetic types and different tendency to self-ignition have been studied by means of coal chemistry. It has been shown that oxygen- and sulphur-containing functional groups, especially bridge-bonds, are responsible for the structure and properties of pyrolysis products.
Źródło:: Polish Geological Institute Special Papers; 2002, 7; 45-50
1507-9791
Pojawia się w:: Polish Geological Institute Special Papers
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Provenance of the Malužiná Formation sandstones (Western Carpathians, Slovakia): constraints from standard petrography, cathodoluminescence imaging, and mineral chemistry of feldspars
Autorzy:: Vdacny, M.
Powiązania:: https://bibliotekanauki.pl/articles/2060008.pdf
Data publikacji:: 2013
Wydawca:: Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:: Sandstone Petrography
Cathodoluminescence
Mineral Chemistry
provenance
Opis:: Petrographic, cathodoluminescence, and phase chemistry studies of detrital grains were carried out on sandstones from the Permian Malužiná Formation in the Malé Karpaty Mts. (Hronic Unit, Western Carpathians, Slovakia) to determine their provenance and tectonic setting during the Permian. The results of the present study suggest derivation of the Malužiná Formation sandstones from multiple source areas. Major source lithologies were acid (felsic) plutonic rocks and low- to high-grade metamorphic rocks (probably metamorphosed igneous rocks and metasedimentary rocks), but notable amounts of detritus were also derived from felsic and mafic volcanic rocks. There was only a minor contribution from sedimentary rocks. Detritus was stripped rapidly from broken, high-relief source areas before weathering processes could destroy unstable framework constituents, as documented by the relatively high content of unstable rock fragments and the high feldspar content in the sandstones investigated. The provenance characteristics indicate that deposition of the sandstones of the Malužiná Formation occurred in a rifted continental margin environment supplied from an uplifted area on a thick continental crust composed of rocks of older fold belts.
Źródło:: Geological Quarterly; 2013, 57, 1; 61--72
1641-7291
Pojawia się w:: Geological Quarterly
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Stratigraphic position and sedimentary environment of Late Pleistocene deposits along the cliffed coast of the middle part of the Polish Baltic coast
Autorzy:: Krzyszkowski, D.
Koszka-Maroń, D.
Powiązania:: https://bibliotekanauki.pl/articles/2059371.pdf
Data publikacji:: 2018
Wydawca:: Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:: cliff
geological structure
stratigraphy
petrography
Baltic coast
Opis:: The study was carried out in the wall of a cliff that formed as a result of erosional cutting in the western foreland of a moraine landform from the Pomeranian and Gardno phases (Upper Plenivistulian, Rowy-Ustka clifs; northern Poland). Individual lithostratigraphic units have been documented: glaciofluvial delta deposlts, Poddąbie Till, lacustrine-glacial Wytowno Formation (consisting of three facies: deltaic, lower diamicton, and upper diamicton), lacustrine deposits of the Orzechowo Formation with a thick peat layer, and aeolian series at the cliff crest. The Wytowno Formation deposits include the following lithologies: medium-grained sands, fine-grained sands, muddy sands, muds, silty clays, clays, varved clays, fine-grained multi-fraction deposits, and tills (Dębina Till). Very high inclination of the strata is the result of glaciodynamic deformation. The deposits were accumulated in a proglacial lake. They are characterized by mud and clay as well as sand and sand-muddy lithofacies. The vastness of the water body is evidenced by a considerable size of the delta, and by massive structures of the clay layers.
Źródło:: Geological Quarterly; 2018, 62, 1; 48--68
1641-7291
Pojawia się w:: Geological Quarterly
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Petrographic and geochemical study of the Maastrichtian Ajali Sandstone, North Central Nigeria
Autorzy:: Ogala, J. E.
Olobaniyi, S. B.
Omo-Irabor, O. O.
Adaikpoh, E. O.
Powiązania:: https://bibliotekanauki.pl/articles/2059843.pdf
Data publikacji:: 2015
Wydawca:: Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:: petrography
geochemistry
Ajali Sandstone
provenance
tectonic setting
Opis:: he Upper Cretaceous Ajali Sandstone is an extensive stratigraphic unit of the Anambra Basin in southern Nigeria. It consists of friable, white cross-bedded sandstones exhibiting a fining upward sequence. Structures such as bioturbation, planar and herringbone cross beds indicate variability in depositional environment ranging from fluviatile to deltaic. Petrographic and geochemical compositions (major and trace elements) of these sandstones have been investigated to determine their provenance, tectonic setting and weathering conditions. Fifteen sandstone samples examined are rich in quartz but poor in feldspar and lithic fragments. Texturally, the framework grains of the sandstones are fine- to medium-grained, sub-angular to sub-rounded, moderately sorted to poorly sorted, positively skewed and leptokurtic. The sandstones are texturally immature as depicted by their sub-angular edges of grains, but mineralogically mature in terms of high percentage of quartz. The high chemical index of alteration (CIA) values (71.0–99.2%) for these sandstones suggests that they were derived from highly weathered rocks in the source area. The composition of the major oxides in the sandstones revealed that SiO2 (49.1–99.7%), Al2O3 (0.2–30.3%), Fe2O3 (0.4–1.8%) and TiO2 (0.06–3.2%) were the most abundant elements in all sandstone samples indicating a high detrital quartz and clay mineral content. The Al2O3/TiO2 ratios (1.47 to 12.48), Ti/Zr (6.48–18.63) and Zr/Cr (2.24–22.36) suggest that the sandstones were derived from variable basement complex rocks, including some contribution from mafic or ultramafic components. Inferences from the plots of K2O/Na2O versus SiO2 indicated a passive margin tectonic setting for the sandstones. The high loading of CaO and Na2O in more than 50% of the samples is indicative of terrigenous input, mainly in the form of carbonates and silicates. These results are generally consistent with a derivation of the sandstones from adjacent igneous and metamorphic basement complexes (Cameroon–Adamawa highlands and Oban Massif) while the extensive and blanket-like geometry of the Ajali Sandstone is indicative of an excellent reservoir for groundwater in the Anambra Basin.
Źródło:: Geological Quarterly; 2015, 59, 1; 79--90
1641-7291
Pojawia się w:: Geological Quarterly
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: The diversity of ceramic raw materials used in the production of Neolithic vessels in the upper Vistula basin near Krakow
Autorzy:: Rauba - Bukowska, Anna
Powiązania:: https://bibliotekanauki.pl/articles/498086.pdf
Data publikacji:: 2019
Wydawca:: Uniwersytet Rzeszowski. Instytut Archeologii Uniwersytetu Rzeszowskiego. Muzeum Okręgowe w Rzeszowie
Tematy:: early Neolithic
raw materials
ceramics
petrography
Małopolska
Opis:: Specialist analysis of ceramics helps to identify the raw material used for their production and to determine whether the material was chosen deliberately for its specific parameters. The present study of Neolithic vessels and of sampled raw materials has shown that Linear Pottery population tended to use plastic Miocene clay, but silty alluvial loam was equally popular. A comparison between the types of vessels and ceramic bodies has proven that thin-walled vessels were more often made of material with a high content of grains of silty fraction, while thick-walled vessels were usually shaped from heavy clay. This suggests that there were certain rules to be observed when preparing the paste, despite the local diversity of raw materials
Źródło:: Analecta Archaeologica Ressoviensia; 2019, 14; 7-16
2084-4409
Pojawia się w:: Analecta Archaeologica Ressoviensia
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Mineralogical study and enhanced gravity separation of gold-bearing mineral, South Eastern Desert, Egypt
Autorzy:: El-Sayed, Samah
Abdel-Khalek, N. A.
El-Shatoury, E. H.
Abdel-Motelib, A.
Hassan, M. S.
Abdel-Khalek, M.A.
Powiązania:: https://bibliotekanauki.pl/articles/1845207.pdf
Data publikacji:: 2020
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:: gold
mineralogy
petrography
gravity separation
Falcon concentrator
Opis:: El-Hudi gold deposit, located in the South Eastern Desert of Egypt, represent large vein- type gold occurrence. The representative sample revealed the abundance of quartz as main constituent with minor amounts of mineral impurities. Gold was detectable (12 g/t) as determined using atomic absorption. The petrographic study revealed that the gold grains ranged from 10-40 μm. The grain boundaries of quartz are highly stained with iron minerals as hematite and limonite. Sericite mineral is common in discrete gold-bearing veins. Eroded pyrite was detected with high alteration leaving only cubic-shaped cavities behind. Different techniques for gravity separation were used to separate gold from the quartz mineral. After crushing and grinding of the sample, shaking table was used to upgrade the coarser fractions while Falcon concentrator was employed to upgrade the fine fraction. The best concentrate was obtained through grinding the whole sample to less than 0.2 mm, followed by cleaning steps. The gold content is increased from 12 to 145 g/t with total recovery of 78%.
Źródło:: Physicochemical Problems of Mineral Processing; 2020, 56, 5; 839-848
1643-1049
2084-4735
Pojawia się w:: Physicochemical Problems of Mineral Processing
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Lithologic-petrographic characterization of Silurian rocks in the Niestachów profile (Holy Cross Mountains)
Autorzy:: Malec, J.
Kuleta, M.
Migaszewski, Z. M.
Powiązania:: https://bibliotekanauki.pl/articles/191848.pdf
Data publikacji:: 2016
Wydawca:: Polskie Towarzystwo Geologiczne
Tematy:: Holy Cross Mountains
Silurian
lithology
petrography
greywackes
Opis:: The Niestachów profile is located in the southwestern part of the Holy Cross Mountains and exposes lower Ludlovian greywacke sediments of the Niewachlów Beds that occur above graptolitic claystones of the Prągowiec Beds. Within the sequence of lithologically diversified Niewachlów Beds, more than 400 m thick, 11 characteristic lithologic complexes were identified. The lower and upper parts of the Niewachlów Beds comprise fine- and medium-grained greywacke sandstones with mudstone interbeds, whereas the middle part contains coarse-grained greywacke sandstones and conglomerates. The sediments were transported by “turbiditic currents” from the southwest. Petrographic examination of the upper part of the Prągowiec Beds and the Niewachlów Beds indicates that the greywacke conglomerates and sandstones of the Niewachlów Beds are composed primarily of volcanic and sedimentary lithoclasts, with subordinate metamorphic and scarce plutonic lithoclasts. The sandstones and conglomerates were derived from an orogen containing sandstones and mudstones as well as from the magmatic rocks of a continental volcanic arc, characterized by acidic-intermediate volcanism.
Źródło:: Annales Societatis Geologorum Poloniae; 2016, 86, 1; 85-110
0208-9068
Pojawia się w:: Annales Societatis Geologorum Poloniae
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Petrography of glacial tills in the szczerców out crop, central poland – problems of stratigraphic interpretation
Autorzy:: Krzyszkowski, Dariusz
Wachecka-Kotkowska, Lucyna
Wieczorek, Dariusz
Stoiński, Andrzej
Powiązania:: https://bibliotekanauki.pl/articles/2025804.pdf
Data publikacji:: 2015
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: tills
petrography
lithostratigraphy
Pleistocene
central Poland
Kleszczów Graben
Opis:: The pa per pres ents re sults of petrographic anal y ses of gla cial tills in the west ern part of the Kleszczów Graben and the at tempt of their strati graphic in ter pre ta tion. Petrographic co ef fi cients have al lowed the iden ti fi ca tion of five till lithotypes: T1, T2A, T2 and T2B – as signed to the South Pol ish Com plex (Elsterian) and T4 cor re lated with the Mid dle Pol ish Com plex (Saalian). The well-ex pressed tills that rep re sent the South Pol ish Com plex, oc cur at the bot tom of the sec tion. A new till lithotype, T2B, has been dis tin guished, cor re spond ing to the Kuców For ma tion. It sup ple ments the Pleis to cene lithostratigraphic sec tion of cen tral Po land and cor re sponds to the Sanian 2 Gla ci ation. Among the younger tills, the T4 one (Odranian Gla ci ation) is well de vel oped. The up per most tills of the Wartanian cold stage have been re duced by glaciofluvial and flu vial ero sion. It is, to some ex tent a con se quence of the ex is tence of a de pres sion in this area, called the Szczerców Ba sin. The pa per high lights the in ter pre ta tional dif fi cul ties con cern ing the rank and the num ber of ice sheet ad vances dur ing the Pol ish and Mid dle Pol ish Com plexes in cen tral Poland.
Źródło:: Studia Quaternaria; 2015, 32; 99-108
1641-5558
2300-0384
Pojawia się w:: Studia Quaternaria
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Mikrolitotypowy profil pokładu węgla kamiennego 116/2 (warstwy libiąskie) oraz jego interpretacja facjalna - ZG 'Janina' (GZW)
Microlithotype profile of the coal seam no. 116/2 (Libiąż Beds) with facial interpretation - ZG 'Janina' (USCB)
Autorzy:: Misiak, J.
Powiązania:: https://bibliotekanauki.pl/articles/216564.pdf
Data publikacji:: 2011
Wydawca:: Polska Akademia Nauk. Instytut Gospodarki Surowcami Mineralnymi i Energią PAN
Tematy:: karbon
węgiel
petrografia
mikrolitotypy
Carboniferous
coal
petrography
microlithotypes
Opis:: Obecnie, ze względu na niestabilną sytuację na rynku paliw, jak również z dbałości o środowisko naturalne, obserwuje się wzrost zainteresowania nowymi technologiami (również znanymi, ale niestosowanymi z różnych względów na szerszą skalę) opartymi na wykorzystaniu węgla. Ich stosowanie wymaga szczegółowego rozpoznania budowy pokładów węgla. Taką możliwość, jak się wydaje, stwarza opis pokładów węgla, przy użyciu zmodyfikowanej metodyki standardowo stosowanej analizy mikrolitotypowej. Metoda ta jest również przydatna w badaniach facjalnych pokładów węgla kamiennego. Modyfikacja tej metody badawczej, w celu umożliwienia opisu zmienności mikrolitotypowej w profilu pokładu węgla, polega na 10-krotnym zwiększeniu wymiarów pola siatki 20-punktowej - do wymiarów 500 x 500 [...]. Identyfikowane w trakcie obserwacji mikroskopowych mikrolitotypy umieszczane są w komputerowej bazie danych zgodnie z ich lokalizacją w profilu. Pozwala to na późniejszą interpretację graficzną - wykreślenie profilu mikrolitotypowego.W opisie wyodrębniono 13 asocjacji, w większości zgodnych z powszechnie stosowanymi mikrolitotypami. Zastosowano jednak kilka zmian: w obrębie witrytu wydzielono telo-witryt - zbudowany z telinitu lub kolotelinitu, w profilu makroskopowo widoczny jako warstewki witrynu i detro-żelo-witryt - zbudowany z kolodetrynitu, witrodetrynitu, korpożelinitu i żelinitu, w profilu makroskopowo identyfikowany jako duryn; w obrębie mikrolitotypów bimaceralnych wydzielono witrynertyt (W), witrynertyt (I), klaryt (W), klaryt (I), duryt (L), duryt (I) na podstawie dominującego składnika podanego w nawiasie. Przyjęta metodyka badań umożliwia szczegółową charakterystykę zmienności petrograficznej w profilu pokładu węgla. Pozwala ona w szczególności opisać zmienność w obrębie węgla matowego (durynu), którego odcinki występujące w pokładzie, mimo to, że makroskopowo wyglądają bardo podobnie lub niemal identycznie, mogą mieć bardzo zróżnicowany skład petrograficzny. Największy udział w budowie pokładu ma duroklaryt - 23,8%, nastepnie witryt 18,7% i klaroduryt 17,6%; kilkuprocentowy udział mają witrynertyt (I), witrynertyt (W), inertyt, klaryt (W), witrynertoliptyt, duryt (I), duryt (L); poniżej jednego procenta jest liptytu i klarytu (L). Sekwencja występujących po sobie mikrolitotypów ilustruje również zmienność facjalną, co pozwala na interpretację środowisk depozycji torfu w paleotorfowisku pokładu 116/2. Dominujący udział procentowy w profilu ma facja Forest Moor - 33,5%, a najmniejszy facja Forest Terrestial Moor - 12,5%.
Applying new technologies basing on coal utilization demands precise identification of coal-bed composition. It is suggested, that such possibility is enabled by coal-bed logging with use of - adjusted to this aim - microlithotype analysis. Modification of this research method relies on ten-fold augmentation of 20 point grid size dimensions - up to 500 x 500 [...]. Maceral associations - as identified duringmicroscope observations - are placed in computer database according to their localization in logging. This allows for later graphic interpretation - microlithotype profile drawing. 13 associations has been educed in description, in majority being consistent with commonly used microlithotypes. However, a few changes has been introduced: in description of vitrite, telovitrite, macroscopically recognized in logging as vitrine layers, has been distinguished, as well as detro-gelo-vitrite, macroscopically recognized in logging as durain, while within bimaceralic microlithotypes there has been distinguished: vitrinertite (W), vitrinertite (I), clarite (W), clarite (I), durite (L), durite (I), all on the basis of dominant ingredient named in parenthesis. Accepted research methodology enables precise characteristics of petrographic variation within coal-bed logging. This allows especially to describe variation within dull coal (durain). Basing on research results, it is suggested that the biggest share in seam composition belongs to duroclarite - 23.8%, then vitrite - 18.7% and clarodurite - 17.6%, lower share of few percent belongs to: vitrinertite (I), vitrinertite (W), inertite, clarite (W), vitrinertoliptite, durite (I), durite (L), while both liptite and clarite (L) are less than one percent . Sequence of following microlithotypes also illustrate facies variation, what allows interpretation of environments of peat deposition in paleo-peat bog 116/2. Dominating percentage in log belongs to Forest Moor facies - 33.5%, while the lowest is Forest Terrestial Moor - 12.5%.
Źródło:: Gospodarka Surowcami Mineralnymi; 2011, 27, 2; 5-15
0860-0953
Pojawia się w:: Gospodarka Surowcami Mineralnymi
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Petrography of the Baszkówka chondrite
Autorzy:: Siemiątkowski, J.
Powiązania:: https://bibliotekanauki.pl/articles/2059299.pdf
Data publikacji:: 2001
Wydawca:: Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:: Baszkówka
ordinary chondrites
chondrules
structure
petrography
classification
origin
Opis:: The Baszkówka chondrite comprises chondrules, individual crystals of olivine, xenomorphic concentrations of kamacite and troilite, matrix and pores up to 3.0 mm in diameter; porosity reaches 20% by volume. Measurements of 697 chondrules in an area of 250 m2 enabled distinction of three populations. The chondrules and olivine crystals have been sintered at high temperatures. Six structural types showing transitions between porphyritic and granular structures have been discriminated. Rims showing a similar diversity surround about 10% of chondrules. The composition and structure of the chondrules suggest a source from the nebular dust disk around the Sun. The abudance of voids and their relatively large size and a lack of fissures, indicate a small size of the host body, which must have been derived from an early phase of protoplanet formation.
Źródło:: Geological Quarterly; 2001, 45, 3; 263-280
1641-7291
Pojawia się w:: Geological Quarterly
Dostawca treści:: Biblioteka Nauki

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