Informacja

Drogi użytkowniku, aplikacja do prawidłowego działania wymaga obsługi JavaScript. Proszę włącz obsługę JavaScript w Twojej przeglądarce.

Wyszukujesz frazę "minerals" wg kryterium: Temat


Tytuł:
Nowa metodyka wyznaczania surowców kluczowych, strategicznych i krytycznych dla polskiej gospodarki
New methodology for designation of key, strategic and critical minerals for the Polish economy
Autorzy:
Galos, Krzysztof
Lewicka, Ewa
Burkowicz, Anna
Guzik, Katarzyna
Kamyk, Jarosław
Kot-Niewiadomska, Alicja
Szlugaj, Jarosław
Powiązania:
https://bibliotekanauki.pl/articles/2076123.pdf
Data publikacji:
2021
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
surowce kluczowe
surowce strategiczne
minerały krytyczne
bezpieczeństwo surowcowe
polityka surowcowa
key minerals
strategic minerals
critical minerals
mineral security
mineral policy
Opis:
The paper presents a proposal for methodology of designation of the key, strategic and critical minerals, important for the mineral security of Poland. The authors proposed a comprehensive methodology for analysis of 148 individual minerals. When determining the key minerals, a criterion of average value of their annual consumption in Poland in the last decade (2009-2018) was adopted. This approach also regards to the general tendency of consumption of a given mineral and the net import reliance index. To determine strategic minerals, a two-stage analysis was performed, i.e. the identification of potentially strategic minerals that are indispensable for the sectors defined as crucial for the country’s economic security (based on an expert assessment), and – from among them – establishment of the list of strategic minerals on the basis of criteria of the average consumption value in recent years and the net imports reliance. For the identification of critical minerals, the methodology developed for the European Union with some significant modifications was adopted: all the minerals previously classified as key and/or strategic were granted the status of high economic importance in Poland, with disregarding of EU’s evaluation of the value of economic importance (EI) indicator. The second EU index – the supply risk index (SR) – for the determination of the critical minerals for Poland – was slightly reduced from 1.0 to 0.9. Based on the analysis conducted, three lists comprising 42 key, 24 strategic and 17 critical minerals indispensable for the Polish economy development were proposed. Identification of these minerals is of fundamental importance for further works on the Mineral Policy of Poland.
Źródło:
Przegląd Geologiczny; 2021, 69, 10; 654--665
0033-2151
Pojawia się w:
Przegląd Geologiczny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Cyclops Mountains Massif (New Guinea, Indonesia) as the provenance area for metal-bearing shelf sediments from the Carolinian Sea
Autorzy:
Zglinicki, Karol
Szamałek, Krzysztof
Powiązania:
https://bibliotekanauki.pl/articles/2059672.pdf
Data publikacji:
2020
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
continental shelf sediments
Cyclops Mountains
New Guinea
heavy minerals
geological prospection
marine minerals
Opis:
In 2009, on the initiative of PT Halmahera Perkasa the “Jayapura” exploration project was carried out in Indonesia. As part of this project, exploration of the sea bottom in the northern coast of New Guinea was carried out over a distance of ~45 km. The suction dredge collected 59 samples of loose sediments from the shelf bottom surface of the Carolinian Sea (to a depth of 60 m below the sea-floor). The extracted samples are usually poorly and moderately sorted sands (5 samples), medium-grained sands (21 samples), and fine-grained sands (33 samples). The sand composition shows, among others, a wide spectrum of heavy minerals of ultra-mafic (Cr-garnet, chromium spinel, Mg-olivine) and metamorphic (epidote, clinochlore, amphibole, titanite) origin. The content of heavy minerals in the sediments is up to 54.77 wt.%. It was found that the source of heavy fraction in the eastern and western parts of the coast is the rock of the ophiolite series building the Cyclops Mountains Massif. The mineral composition of sediments from the central coastal zone corresponds to the types of rocks building the metamorphic core of the Cyclops Mountains (amphibolite, gneisses, andesite). Three mineral-geochemical subprovinces were determined on the basis of analyses of heavy mineral decomposition and chemical analyses of sediments. Shelf sediment from the eastern part of the coast is characterized by an increased content of strategic metals (Ni up to 3560, W up to 3130 and Co up to 142 ppm). In the central zone, the V content increases up to 244 ppm and the Ag content up to 5 ppm. In the shelf sediments there is a strong depletion in the REE.
Źródło:
Geological Quarterly; 2020, 64, 2; 480--491
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mineralogia hałd wietrzeniowych złoża Miedzianka (Góry Świętokrzyskie)
Mineralogy of weathering heaps in the Miedzianka deposits (Holy Cross Mountains)
Autorzy:
Swęd, M.
Urbanek, P.
Krechowicz, I.
Dworczak, P.
Wiecka, P.
Mleczak, M.
Tobys, P.
Powiązania:
https://bibliotekanauki.pl/articles/2075336.pdf
Data publikacji:
2015
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
minerały
wietrzenie
Miedzianka
minerals
weathering
Opis:
The paper presents new data on the weathering zone in Miedzianka, Holy Cross Mountains (Poland), including macroscopic, microscopic and chemical investigation, using scanning electron microscope (SEM) with energy dispersive spectrum (EDS). The deposit contains sulphide mineralization (e.g. chalcopiryte, chalcocite), and carbonates with hydroxyl (malachite and azurite) in the weathering zone. Additionally, arsenic – bearing sulphosalts of the tennantite – tetrahedrite group and Ba-sulphate were found. Moreover, cracks are observed on a macro- and micro-scale, filled with new minerals that formed during the weathering.
Źródło:
Przegląd Geologiczny; 2015, 63, 6; 363--370
0033-2151
Pojawia się w:
Przegląd Geologiczny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Heavy minerals in the key Late Pleistocene loess-palaeosol section at Kolodiiv (East Carpathian Foreland, Ukraine)
Autorzy:
Racinowski, R.
Powiązania:
https://bibliotekanauki.pl/articles/2059497.pdf
Data publikacji:
2007
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Ukraine
Late Pleistocene
loess
palaeosols
heavy minerals
Opis:
Successions of loess and other deposits in the Kolodiiv profile, formed during the Eemian Inter glacial and Vistulian Glacial (OIS 5-2), are characterized using the results of heavy mineral analysis. Weathered local carbonate rocks and fluvial deposits (Wartanian Glacial, OIS 6) are used for comparison. It was found that the content of minerals derived from weathered and redeposited Carpathian Flysch increases from bottom to top of the profile. The entire loess succession accumulated under similar lithodynamic conditions and the palaeosols are of similar character.
Źródło:
Geological Quarterly; 2007, 51, 2; 185-188
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mineralogy of the Baszkówka chondrite (L5 S1): new data on silicates, opaques and minor minerals
Autorzy:
Borucki, J.
Stępniewski, M.
Powiązania:
https://bibliotekanauki.pl/articles/2059302.pdf
Data publikacji:
2001
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Baszkówka
meteorites
ordinary chondrites
minerals
spinel
picotite
Opis:
The mineral composition of the Baszkówka meteorite comprises: olivine, pyroxenes, plagioclase, Fe,Ni metal, troilite and chromite with minor chlorapatite, whitlockite, magnetite, haematite, spinel, idaite, calcite and native Cu. A rare variety of spinel (picotite), probably the oldest among the minerals of Baszkówka, was identified in the only two chondrules named: panda and chevron. The composition of the olivine (Fa 26.2š1.8 wt.%) and the high degree of chondrite homogenisation, a result of thermal metamorphism, are consistent with earlier results and indicate the L5 group. No distinct shock effects were observed in Baszkówka, classified as S1. Troilite-Fe,Ni and Fe,Ni metal lumps are defined and interpreted as molten planetesimals impact splashes.
Źródło:
Geological Quarterly; 2001, 45, 3; 229-256
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Colourful speleothems in the Wieliczka Salt Mine
Autorzy:
Sawłowicz, Z.
Przybyło, J.
Boroń, K.
Powiązania:
https://bibliotekanauki.pl/articles/2060052.pdf
Data publikacji:
2014
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
halite
speleothem
Wieliczka mine
iron minerals
colours
Opis:
Secondary halite deposits in the Wieliczka Salt Mine are represented by various forms of speleothems. Some of them, e.g. stalactites, cauliflowers or crusts, reveal various hues, yellow to red to brown. These hues are related to iron compounds, but the forms, occurrence and composition of these compounds has not previously been studied. To explain the origin of their colours a detailed study of samples collected in the mine, including brines and water soluble extracts and produced experimentally in the laboratory, has been undertaken using SEM, XRD and AAS. The colourful speleothems are compared, using SEM-EDS, with the forms and composition of rusting metal artefacts, where several iron oxide minerals have been identified. We suggest that coloured halite is generally pure halite of which the surface was covered by a ferric minerals suspension in the brine. Colours of the speleothems stem from the various colours of iron minerals whereas their intensity is related probably to the type of fluid that coated the crystals, a continuous film or finely dispersed micron-size mineral aggregates.
Źródło:
Geological Quarterly; 2014, 58, 3; 449--458
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wybrane zagadnienia biomineralogii
Selected issues of biomineralogy
Autorzy:
Pawlikowski, Maciej
Powiązania:
https://bibliotekanauki.pl/articles/20198314.pdf
Data publikacji:
2022
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
tkanka
krystalizacja
rozpuszczenie
równowaga chemiczna
minerały pierwotne
minerały wtórne
minerały obecne w tkankach organizmów
tissue
crystallization
dissolution
chemical balance
primary minerals
secondary minerals
minerals present in tissue of organisms
Opis:
Biomineralogy is the science between mineralogy, biology, medicine and biochemistry. It is focused on problems concerning mineralization of tissue and organs of human, animals and flora. It concerns interaction between mineral and biological tissue, as well as between biochemical components of living organism. These processes are important for good functioning of organs and human life.
Źródło:
Przegląd Geologiczny; 2022, 70, 11; 834-839
0033-2151
Pojawia się w:
Przegląd Geologiczny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Secondary arsenic minerals from the Złoty Stok As-Au abandoned mine (SW Poland)
Autorzy:
Siuda, R.
Macioch, A.
Powiązania:
https://bibliotekanauki.pl/articles/2060083.pdf
Data publikacji:
2018
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
erythrite-hörnesite-annabergite series
picropharmacolite
secondary arsenic minerals
Opis:
Secondary arsenic minerals (SAM) formed recently in abandoned adits of the former Au-As mine at Złoty Stok (SW Poland) constitute two assemblages. The first consists of two types of scorodite, pitticite, kaňkite, hörnesite, picropharmacolite and minor amounts of jarosite and gypsum. Formation of the Fe arsenates took place under acidic conditions (pH ~3-4) as a result of löllingite, arsenopyrite and pyrite oxidation. Hörnesite and picropharmacolite crystallized as products of interactions between acidic arsenic-rich pore solutions with Mg-Ca carbonates from rocks that surround the ore mineralisation. The interaction of carbonates with acid pore solutions caused a rapid increase in pH that reached neutral or weakly alkaline values. The chemical compositions of hörnesite and picropharmacolite correspond well to their ideal compositions: (Mg3.17Ca0.07)Ʃ3.24(AsO4)1.90 8H2O and Ca4.31Mg0.92(HasO4)1.91[(AsO4)1.99(SO4)0.01]Ʃ2.00 11H2O, respectively. The second assemblage of SAM comprises exclusively the Mg-enriched erythrite [(Co1.66Mg1.03Ni0.28Ca0.05Zn0.02)Σ3.03(AsO4)1.99× 8H2O)] – annabergite [(Ni1.48Mg0.94Co0.66Ca0.12Fe0.01Zn0.01)S3.20AsO4)1.92× 8H2O] series. These minerals crystallized from slightly acidic (pH ~5–6) to neutral media. Dissolution of SAM and other secondary phases (e.g., schwertmannite) causes the release of arsenate and sulphate ions into mine waters. These ions can be reduced under anaerobic conditions by different strains of bacteria. The product of this proces is orpiment.
Źródło:
Geological Quarterly; 2018, 62, 4; 925--940
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Latest Triassic climate humidification and kaolinite formation (Western Carpathians, Tatric Unit of the Tatra Mts.)
Autorzy:
Lintnerová, O.
Michalik, J.
Uhlík, P.
Soták, J.
Weissová, Z.
Powiązania:
https://bibliotekanauki.pl/articles/2060305.pdf
Data publikacji:
2013
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
sedimentology
foraminifers
clay minerals
carbon isotopes
REE
palaeogeography
Opis:
The Tomanová Formation, of Rhaetian age, overlying the Norian Carpathian Keuper in the Tatra Mts. is built of cyclic parasequences of mudstones and sandstones. Quartz (15 to 70 wt.%), kaolinite (13 to 46 wt.%) and 2:1 Al dioctahedral phyllosilicates (dioct 2:1: muscovite, illite, illite/smectite: 5 to 39 wt.%) represent the major mineral phase. The kaolinite/dioct 2:1 ratio decreases upwards in the section (from 4.3 to 0.5) and signals variability in weathering/erosion intensity and changing water salinity. Major and trace elements (LILE, HSFS, REE) indicate a uniform source – felsic rocks located probably in the Vindelician Highlands. The sedimentation rate (83 mm/ky) was controlled by climate. Alternation of dry and humid periods is refered by sedimentary textures and by maturity of quartz (aeolian vs. fluvial grains), and organic matter content and composition (Corg and d13Corg). Authigenic siderite or bethierine documents wet and reduced conditions in the upper part of the Tomanová Formation. The sedimention rate of the marine Dudzinec Formation attained 25 mm/ka and the character of cycles preserved in the sequence is similar as that of the Tomanová Formation (fining upwards parasequences). However, the different clay mineralogy, the recycled character of the silicates, the different d13Corg and elevated imput of carbonate detritus with specific C and O isotopic patterns document a discontinuity in the section. The transgressive character of the Dudzinec Fm. was deduced from the stratigraphic distribution and environmental characteristics of the benthic foraminifera present. Involutinids and spirillinids dominate in the lower part, endothyrinids govern the middle part, and in the upper part nodosariids and Ammodiscus-type microfauna occur. These age-diagnostic microfossils indicate a late Rhaetian age. Sea level rise in the Tatric Zone triggered by thermal expansion of the Central Atlantic Rift was gradual, being affected by input of terrestrial clastic sediment both by freshwater and by wind. The Tatric Triassic sequence in the Western Carpathians helps understanding of the development of sedimentation, palaeoclimate (kaolinite weathering), and palaeogeography of the northernmost Tethyan Domain.
Źródło:
Geological Quarterly; 2013, 57, 4; 701--728
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
New data on heavy minerals from the Upper Cretaceous-Paleogene flysch of the Beskid Śląski Mts. (Polish Carpathians)
Autorzy:
Grzebyk, J.
Leszczyński, S.
Powiązania:
https://bibliotekanauki.pl/articles/2058926.pdf
Data publikacji:
2006
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Polska
Carpathians
Paleogene
Upper Cretaceous
heavy minerals
provenance
Opis:
The types, abundance and origin of non-opaque heavy minerals from17 samples of sandstones and granule conglomerates of the Godula Beds, Upper Istebna Sandstone, Ciężkowice and Cergowa Sandstone (Upper Cretaceous–Paleogene) of the Beskid Śląski Mts. are described in this study. The descriptions are based on standard optical petrographic investigations and on scanning electronmicroscope (including electron microprobe) analysis. Garnet, rutile, zircon and tourmaline are the most common types of heavyminerals. Monazite and apatite occur subordinately, whereas epidote and spinel are sporadic. The heavy minerals from the Middle and Upper Godula Beds and the Upper Istebna Sandstone indicate original derivation mainly from metamorphic rocks of granulite and partly eclogite facies. Metasediments were significant constituents, with subordinate granitoids and hornfelses. Granitoids and corresponding pegmatites and aplites, as well as metapelites and metapsammites, appear to be the primary crystalline parent rocks of the Lower Godula Beds and the Ciężkowice Sandstone. Garnet-mica schists with subordinate granitoids and their pegmatites are interpreted as the main crystalline parent rocks of the Cergowa Sandstone. Sporadic chromian spinels and chromian pyrope indicate derivation from mafic and ultramafic rocks. Co-occurrence of rounded and fresh unabraded grains (sometimes euhedral) suggests a mixed provenance for the clastic material, both from crystalline and older sedimentary rocks.
Źródło:
Geological Quarterly; 2006, 50, 2; 265-280
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Temperature and isotopic relations in carbonate minerals in the Middle Jurassic sideritic rocks of central and southern Poland
Autorzy:
Jarmołowicz-Szulc, K.
Kozłowska, A.
Powiązania:
https://bibliotekanauki.pl/articles/2060537.pdf
Data publikacji:
2016
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
fluid inclusions
isotopes
carbonate minerals
sideritic rocks
Middle Jurassic
Opis:
The present study assesses the physico-chemical character of the fluids responsible for the genesis of carbonate minerals in the Middle Jurassic sideritic rocks at the northeastern margin of the Holy Cross Mts. and in the Częstochowa region. These rocks occur at present at depths between 30 and 600 m. Fluid inclusion and isotopic analyses have been performed in the carbonate minerals from sideritic sandstones, clayey siderites and sideritic coquinas. Siderite is the main carbonate mineral of the sideritic rocks. Calcite and ankerite are also present. The siderite is represented by two varieties, Mg-rich siderite (sideroplesite, less commonly – pistomesite) and siderite. Two generations of siderite have been distinguished – an early and a late one. The early siderite was formed at temperatures of about 20°C in the zone of microbiological methanogenesis from marine waters with some influence of meteoric waters (δ18O from –7.84 to –1.92‰ VSMOW). The late siderite crystallized at temperatures of about 62–110°C from pore waters enriched in 18O (δ18O >0‰ VSMOW) as compared with the isotopic composition of the waters responsible for the early siderite generation. The conducted fluid inclusion analyses point to formation of the cements from complex fluids of brine and carbon dioxide character, with densities slightly exceeding 1 g/cm3 and salinities varying from 10.5 to 16.9 wt.% NaCl eq. and from 6.4 to 14.0 wt.% NaCl eq. in the Holy Cross Mts. and in the Częstochowa region, respectively. The homogenization temperatures lie in the intervals of 62–110°C and 60–97°C, respectively and represent elevated values compared with data from the Polish Lowlands. Apart from burial, other heat sources must have been important for the lithogenesis of the Middle Jurassic deposits.
Źródło:
Geological Quarterly; 2016, 60, 4; 881-892
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Texture and petrography of glacial deposits in the northern foothill of the Hruby Jesenik and Rychlebske Mts., Czechia
Autorzy:
Sikorova, J.
Višek, J.
Nyvlt, D.
Powiązania:
https://bibliotekanauki.pl/articles/2059228.pdf
Data publikacji:
2006
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
northern Moravia
clast shape
provenance
glaciofluvial sediment
heavy minerals
Opis:
The petrographic and mineralogical characteristics of glacial deposits from the localities in the northern foothills of the Hruby Jesenik and Rychlebske Mts. have been studied. Grain-size, petrographic composition, heavy minerals, clast shape and roundness have been investigated. The data obtained have been used to create a probability model to differentiate the stratigraphy of particular accumulations and for partial reconstruction of the advance direction of the ice sheet in the area. The main advance direction of the ice sheet was presumed to be from the NW to SE in this region. The erratic material was probably predominantly transported in the basal ice layers according to the clast shape and roundness. An Elsterian age of the sedimentary bodies investigated is suggested by correlation with analogous deposits in adjacent parts of Poland. This model contradicts previous correlations. However, further constraints on the stratigraphic position of these deposits would require the application of dating techniques.
Źródło:
Geological Quarterly; 2006, 50, 3; 345-352
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Epithermal Cu mineralization in the Stary Lesieniec rhyodacite quarry, Lower Silesia : primary and secondary mineral paragenesis
Autorzy:
Mederski, Sławomir
Kruszewski, Łukasz
Pršek, Jaroslav
Powiązania:
https://bibliotekanauki.pl/articles/2060102.pdf
Data publikacji:
2021
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Stary Lesieniec
copper sulphides
epithermal ore deposit
secondary minerals
Opis:
Primary epithermal and secondary Cu mineralization in the Stary Lesieniec rhyodacite quarry, located within the Intra-Sudetic Depression, was studied using reflected light microscopy, powder X-ray diffraction, and electron microprobe. Samples containing copper sulphides, baryte, and secondary weathering minerals were collected from mineralized veinlets in the Upper Carboniferous rhyodacite. Copper sulphides (chalcocite Cu2S, djurleite Cu31S16, anilite Cu7S4 / digenite Cu9S5, and covellite CuS) are the major ore minerals and are associated with quartz, hematite, and very minor uraninite. The samples studied indicate phase transformation from chalcocite to anilite, which indicates that Cu sulphides began to crystallize at ~100°C. Then, during the epithermal stage of precipitation, the temperature of the solutions dropped <72°C, based on the Cu-S ternary diagram and anilite stability. Admixtures of Ag, Fe, Bi, and Se in the sulphides are very minor. Supergene paragenesis is represented by chrysocolla with minor brochantite and very scarce malachite. These only bear trace impurities at the anionic sites. The supergene oxidation process began with the formation of abundant chrysocolla, at a relatively neutral pH. After dropping of the pH to ~4–6, brochantite was deposited.
Źródło:
Geological Quarterly; 2021, 65, 3; 65: 43
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Heavy minerals from Oligocene sandstones of the Menilite Formation of the Skole Nappe, SE Poland : a tool for provenance specification
Autorzy:
Salata, D.
Uchman, A.
Powiązania:
https://bibliotekanauki.pl/articles/2060508.pdf
Data publikacji:
2012
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
heavy minerals
provenance
Lower Oligocene
Menilite Formation
Skole Nappe
Opis:
Heavy minerals from sandstones belonging mostly to the Boryslav Sandstone and Kliva Sandstone members of the lower part of the Menilite Formation (Oligocene) in the northern part of the Skole Nappe, Polish Carpathians are characterized. In the study area, the sediments were deposited in the Rzeszów and Łańcut channel zones running from the northern margin of the basin. The most frequent heavy minerals in the sandstones examined include zircon, tourmaline, rutile, staurolite, kyanite and garnet. Single grains of andalusite, sillimanite, apatite, epidote, brookite and chrome spinel occur in some samples. The very small content of apatite is related to long, continental weathering in the source area, which is referred to the Paleozoic sedimentary cover of the Małopolska Block and the easternmost part of the Upper Silesian Block. Different preservation states, morphology, degree of roundness and colour varieties suggest that the heavy minerals studied derive from various petrographic types including metamorphic, igneous and sedimentary rocks. However, the Carboniferous and Permian conglomerates and sandstones seem to be the most probable source rocks.
Źródło:
Geological Quarterly; 2012, 56, 4; 803--820
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Paleocene and Eocene deposits on the eastern margin of the Gulf of Gdańsk (Yantarny P-1 borehole, Kaliningrad region, Russia)
Autorzy:
Kasiński, Jacek Robert
Kramarska, Regina
Słodkowska, Barbara
Sivkov, Vadim
Piwocki, Marcin
Powiązania:
https://bibliotekanauki.pl/articles/2058549.pdf
Data publikacji:
2020
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Paleogene
depositional structures
heavy minerals
palynology
Sambian Peninsula
Russia
Opis:
Lithological and palynological studies of Paleogene siliciclastic deposits from the Yantarny P-1 borehole located on the western coast of the Sambian Peninsula (Kaliningrad region, Russia) show that the succession is characterized by numerous sedimentary discontinuities related to lithification horizons and erosional surfaces. Sedimentary gaps are emphasised by hardgrounds. Palynological data suggest the Selandian-Priabonian age of the succession and indicate a number of significant stratigraphic gaps. An important change in heavy mineral composition is recognized between the Paleocene and Eocene deposits in the area studied. A significant number of reworked Cretaceous microfossils is observed in the Selandian part of the succession studied.
Źródło:
Geological Quarterly; 2020, 64, 1; 29--53
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł

Ta witryna wykorzystuje pliki cookies do przechowywania informacji na Twoim komputerze. Pliki cookies stosujemy w celu świadczenia usług na najwyższym poziomie, w tym w sposób dostosowany do indywidualnych potrzeb. Korzystanie z witryny bez zmiany ustawień dotyczących cookies oznacza, że będą one zamieszczane w Twoim komputerze. W każdym momencie możesz dokonać zmiany ustawień dotyczących cookies