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Tytuł:
Study of the Variations in the Vertical and Horizontal Distribution of Heavy Sand Minerals in the Hilla River Sediments
Autorzy:
Hameed, Iman A.
Rahman, Haleema Abdul Jabbar Abdul
Anmar, Alsaadi
Powiązania:
https://bibliotekanauki.pl/articles/27323812.pdf
Data publikacji:
2023
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
sediment
heavy minerals
specific gravity
Opis:
This study was conducted to investigate the effect of the Hilla River sediments on the heterogeneity of the distribution of heavy sand minerals for the fine and very fine sand classes as well as for the surface and subsurface layers. The results showed that the heavy sand minerals that were determined according to the specific gravity of each mineral and the specific gravity of the particles of minerals identified in the soils under study ranged between (2.5–4.5) and were divided into four groups in terms of the specific gravity. The first group included each of the minerals (Mica and Chlorite) of low specific gravity, while the second group contains (Pyroxene, Amphibole, Epidote Group). The third group includes minerals (Tourmaline and Garnet, Staurolite and Kyanite) and the two groups are classified as minerals of medium-specific gravity; in turn, the fourth group contains minerals of high specific gravity, namely (Zircon, Rutile and Opaques). As a result, the most important factors affecting the sedimentation, sorting and sedimentation processes are the conveyor’s speed, load capacity, the size of the separation particles and their specific gravity. The complete mismatch of the horizontal distribution of the minerals of one group is due to the varying ranges of the specific gravity of the minerals within the general range of specific gravity.
Źródło:
Journal of Ecological Engineering; 2023, 24, 7; 318--330
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Depositional conditions of the Upper Younger Loess during the Last Glacial Maximum in central and eastern Europe
Autorzy:
Dzierżek, Jan
Lindner, Leszek
Chlebowski, Roman
Szymanek, Marcin
Bogucki, Andriy
Tomeniuk, Olena
Powiązania:
https://bibliotekanauki.pl/articles/24024703.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
North European Loess Belt
Vistulian glaciation
aeolian processes
palaeowind circulation
heavy minerals
północnoeuropejski pas lessowy
zlodowacenie Wisły
procesy eoliczne
minerały ciężkie
Opis:
This paper is a summary of the results of research on the accumulation conditions of the Upper Younger Loess (LMg) in Poland and Bug loess (bg) in Ukraine from the maximum stage (MIS 2) of the Vistulian (Weichselian) Glaciation in central and eastern Europe. These studies included an analysis of the morphological (topographic) situation of the loess cover, its grain size and heavy mineral composition, the preserved structures of loess sedimentation as well as mollusc and pollen analyses of this loess. They revealed that the accumulation of Upper Younger Loess (UYL) might have been more dependent on the prevailing moisture conditions than previously thought. These conditions could have been caused by cold air masses from an ice sheet and warm air masses from the Mediterranean Sea and Atlantic coming together in the Carpathians and the Holy Cross Mountains and favouring the formation of dust storms and precipitation. In this process, a loading of loess dust (formed from local rocks weathering in periglacial conditions) by atmospheric moisture particles was especially significant. The moist substrate not only favoured the periodic development of vegetation and molluscs but also enabled the interception of dust and the accumulation of an increasingly thick loess cover. Westerly and south-westerly winds predominated in the UYL as indicated by the topographic position of loess patches and the mineral composition of the studied loess. Periodically an increased air circulation from the east and northeast occurred.
Źródło:
Acta Geologica Polonica; 2022, 72, 4; 369--389
0001-5709
Pojawia się w:
Acta Geologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Origin of fine-grained clastic sediments in caves of the Hoher Göll massif (the Northern Calcareous Alps, Austria)
Autorzy:
Kicińska, Ditta
Powiązania:
https://bibliotekanauki.pl/articles/2055866.pdf
Data publikacji:
2021
Wydawca:
Polskie Towarzystwo Geologiczne
Tematy:
cave sediments
heavy minerals
Augenstein Formation
Northern Calcareous Alps
Opis:
The Hoher Göll Massif is situated 20 km south of Salzburg and belongs to the Northern Calcareous Alps (Austria). It is a ridge ca. 11 km long and 3 km wide with the highest summit Hoher Göll (2522 m a.s.l.), encircled by deeply incised valleys with bottoms ca. 2,000 m below it. Cave clastic deposits were studied in the Hochschartehöhlensystem, Dämchenhöhle and Hintere caves. The caves belong to the Giant Cave Level, with the exception of part of the Hochschartehöhlensystem, that is Der Sprechender Steine Cave, the highest parts of which belong to the Ruin Cave Level. The sources of the cave sediments have been identified from the composition of the heavy fractions. Preliminary studies of the Hoher Göll caves reveal that the cave fills were derived from the Oligocene to earliest Miocene Augenstein Formation, the deposits of the Palaeo-Inn River and the siliciclastic basal strata of the Northern Calcareous Alps. The clastic material deposited as the Augenstein Formation was transported from southern parts of the Eastern Alps and by the Palaeo-Inn river from their western part. According to heavy minerals, the sources of the clastic material were on the Palaeozoic terrains, the post-Palaeozoic sequence, and the Middle Austroalpine Unit. Later, during or after the mountain uplift, weathered materials from the Augenstein and Palaeo-Inn deposits were eroded and transported from the surface into caves by allogenic streams. Some of the sediments were likely to have been transported later to the Giant Cave Level from the southern part of the Northern Calcareous Alps.
Źródło:
Annales Societatis Geologorum Poloniae; 2021, 91, 4; 363--373
0208-9068
Pojawia się w:
Annales Societatis Geologorum Poloniae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Determination of nutritional and chemical composition of some edible wild plants used in herby cheese
Autorzy:
Eryigit, T.
Tuncturk, M.
Tuncturk, R.
Powiązania:
https://bibliotekanauki.pl/articles/1192472.pdf
Data publikacji:
2020
Wydawca:
Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
Tematy:
Liliaceae
herby cheese
heavy metals
nutritional minerals
Opis:
Same as in many parts of the world, many edible weeds belonging to different families that have not been cultured in Turkey are traditionally used in the making of many foods. In this study, minerals and nutrients of six edible wild plant species belonging to the Liliaceae family, which are currently used in the production of herby cheese in the Eastern Anatolia region of Turkey, were determined. The determination of these macro- and micro-minerals was performed on ICP-AES and UV Visible spectrophotometers. As a result of the study, major differences were discovered between these plant species in terms of the mineral content (Na, Mg, K, s, Ca, P, Fr, Mn, Cu, Zn, Cr, and Co) and nutrient properties (total ash, crude fibre, pH, N, and crude protein). Except for the Allium schoenoprasum species, all plant samples were found to be rich in many important minerals, such as Fe, Cu, Ca, K, Mn, and Zn, which are known to be vital for human health. The concentrations of these minerals and a few heavy metals in plant samples were found in the following ranges: 17.25 - 25.47 mg kg-1 for copper, 18.45 - 34.14 mg kg-1 for zinc, 33.42 - 98.42 mg kg-1 for manganese, 0.12 - 0.54 mg kg-1 for chromium, 0.31 - 1.61 mg kg-1 cobalt. Many significant correlations were found among the parameters analysed. The study presents essential results on the availability of some vital minerals that could be useful or harmful to consumers, in order to provide dietary information for designing value-added foods.
Źródło:
Journal of Elementology; 2020, 25, 3; 1127-1139
1644-2296
Pojawia się w:
Journal of Elementology
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
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:
Badanie wpływu zawartości minerałów ciężkich na naturalną promieniotwórczość skał miocenu zapadliska przedkarpackiego
Study on the impact of heavy minerals to natural radioactivity of the Miocene rocks in the Carpathian Foredeep
Autorzy:
Zagórska, Urszula
Sikora, Aleksandra
Łykowska, Grażyna
Powiązania:
https://bibliotekanauki.pl/articles/1834988.pdf
Data publikacji:
2019
Wydawca:
Instytut Nafty i Gazu - Państwowy Instytut Badawczy
Tematy:
minerały ciężkie
spektrometria gamma
promieniotwórczość naturalna
separacja frakcji ciężkiej
mułowce
skały miocenu
zapadliska przedkarpackie
heavy minerals
gamma spectrometry
natural radioactivity
heavy fraction separation
mudstones
Miocene rocks
Carpathian Foredeep
Opis:
W skałach miocenu zapadliska przedkarpackiego zauważono zjawisko zawyżania pomiarów promieniotwórczości naturalnej rejestrowanych w otworze wiertniczym dla mułowców. To zjawisko powoduje problemy w rozróżnianiu na podstawie profilowania naturalnej promieniotwórczości tych skał od iłowców, które charakteryzują się gorszymi parametrami petrofizycznymi. W niniejszej pracy badano kolejne możliwe źródło podwyższonej radioaktywności skał mułowcowych, to jest zawartość minerałów ciężkich, które wykazują tendencję do gromadzenia pierwiastków promieniotwórczych – uranu i toru. Minerały ciężkie, należące do grupy minerałów akcesorycznych, takie jak cyrkon, apatyt, monacyt, rutyl, granat i tytanit, charakteryzują się podwyższoną promieniotwórczością ze względu na podstawienia w sieci krystalicznej U i Th. Na testowych próbkach wykonano pomiar naturalnej promieniotwórczości metodą spektrometrii gamma, przy wykorzystaniu aparatu RT-50 firmy Georadis. Następnie z próbek skał wydzielono minerały ciężkie, przy użyciu cieczy ciężkiej, uprzednio rozdzielając próbki na frakcje ziarnowe, w celu ułatwienia separacji frakcji ciężkiej. Poszczególne frakcje ziarnowe pozbawione minerałów ciężkich złączono z powrotem i wykonano ponowny pomiar zawartości uranu, toru i potasu. Wykonano także obserwacje mikroskopowe w celu jakościowej analizy składu mineralogicznego wydzielonej frakcji ciężkiej. W badanych próbkach zidentyfikowano między innymi ziarna cyrkonu, turmalinu, granatu, rutylu, apatytu, chlorytu czy tytanitu. Przeprowadzone wyniki pomiarów naturalnej promieniotwórczości, przed i po wydzieleniu minerałów ciężkich, nie dają jednoznacznej odpowiedzi na postawiony problem zawyżonych wskazań sondy gamma. Konieczne jest zwiększenie ilości analizowanych próbek. Zaobserwowano trend spadku ilości U i Th w próbkach, z których wydzielono frakcję ciężką. Jednak zmiany promieniotwórczości są na tyle niewielkie, że nie pozwalają na wyciągnięcie ostatecznych wniosków. Dodatkowe analizy są potrzebne, aby ocenić wpływ pozostałych źródeł uranu i toru w badanych skałach, takie jak zawartość materii organicznej czy udział toru we frakcji ilastej.
In the Miocene rocks of the Carpathian Foredeep, the occurrence of overestimating the measurements of natural radioactivity logs for mudstones was noticed. This phenomenon causes problems with recognition on the basis of natural radioactivity profiling of these rocks from claystones, characterized by inferior petrophysical parameters. In this study, another possible source of increased radioactivity of mudstone rocks, i.e. the content of heavy minerals that tend to accumulate radioactive elements - uranium and thorium - was investigated. Heavy minerals, belonging to the accessory minerals, such as zircon, apatite, monazite, rutile, garnet and titanite, are characterized by increased radioactivity due to substitutions of U and Th in the crystal lattice. Natural radioactivity of the test samples was measured using the gamma spectrometry method with the RT-50 device from the Georadis company. The heavy minerals were then removed from the rock samples using a heavy liquid, previously separating the samples into grain fractions to facilitate the separation of the heavy fraction. The individual grain fractions deprived of heavy minerals were put back together and the uranium, thorium (and potassium) content was remeasured. Microscopic observations were also made to qualitatively analyze the mineralogical structure of the separated heavy fraction. In the tested samples, among others: zircon, tourmaline, garnet, rutile, apatite, chlorite or titanite grains were identified. The results of the measurements of natural radioactivity, before and after the separation of heavy minerals, do not give a clear answer to the problem of excessive indications of the gamma logs. It is necessary to increase the number of analyzed samples. The trend of decreasing amounts of U and Th in the samples from which the heavy fraction was isolated was observed. However, changes in radioactivity are so small that they do not allow to draw final conclusions. Additional analyzes are needed to assess the impact of other sources of uranium and thorium in analyzed rocks, such as the content of organic matter or Th content in clays.
Źródło:
Nafta-Gaz; 2019, 75, 2; 77-82
0867-8871
Pojawia się w:
Nafta-Gaz
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Hazardous radioactivity levels and heavy mineral concentrations in beach sediments of Lake Peipsi, northeastern Estonia
Autorzy:
Järvelill, J.-I.
Koch, R.
Raukas, A.
Vaasma, T.
Powiązania:
https://bibliotekanauki.pl/articles/94516.pdf
Data publikacji:
2018
Wydawca:
Uniwersytet im. Adama Mickiewicza w Poznaniu
Tematy:
elevated radioactivity
risk management
beach sediments
heavy minerals
Baltic States
podwyższona radioaktywność
zarządzanie ryzykiem
osady plażowe
minerały ciężkie
kraje nadbałtyckie
Opis:
The present study discusses results of heavy mineral analyses and radioactivity of beach sediments of Lake Peipsi. Such analyses are commonly done globally, but had not yet been conducted for the fourth largest lake in Europe. The average heavy mineral content in Lake Peipsi beach sediments along the northern and western coast is higher than usual for Estonian coastal and Quaternary sediments. Concomitantly, elevated radioactivity levels have been measured in several places, with the highest concentrations observed at Alajõe (1885.5 Bq/kg), which is over five times more than the recommended limit. The aim of the present study is to find sites with higher radioactivity levels, because the northern coast of Lake Peipsi is a well-known recreational area.
Źródło:
Geologos; 2018, 24, 1; 1-12
1426-8981
2080-6574
Pojawia się w:
Geologos
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evolution of Early Pleistocene fluvial systems in central Poland prior to the first ice sheet advance – a case study from the Bełchatów lignite mine
Autorzy:
Goździk, J.
Zieliński, T.
Powiązania:
https://bibliotekanauki.pl/articles/94398.pdf
Data publikacji:
2017
Wydawca:
Uniwersytet im. Adama Mickiewicza w Poznaniu
Tematy:
Quaternary
preglacial
fluvial-aeolian interaction
heavy minerals
quartz grain morphology
sedimentology
palaeoclimate
Czwartorzęd
preglacjał
minerały ciężkie
morfologia ziarna kwarcu
sedymentologia
paleoklimat
Opis:
Deposits formed between the Neogene/Pleistocene transition and into the Early Pleistocene have been studied, mainly on the basis of drillings and at rare, small outcrops in the lowland part of Polish territory. At the Bełchatów lignite mine (Kleszczów Graben, central Poland), one of the largest opencast pits in Europe, strata of this age have long been exposed in extensive outcrops. The present paper is based on our field studies and laboratory analyses, as well as on research data presented by other authors. For that reason, it can be seen as an overview of current knowledge of lowermost Pleistocene deposits at Bełchatów, where exploitation of the Quaternary overburden has just been completed. The results of cartographic work, sedimentological, mineralogical and palynological analyses as well as assessment of sand grain morphology have been considered. All of these studies have allowed the distinction of three Lower Pleistocene series, i.e., the Łękińsko, Faustynów and Krzaki series. These were laid down in fluvial environments between the end of the Pliocene up to the advance of the first Scandinavian ice sheet on central Poland. The following environmental features have been interpreted: phases of river incision and aggradation, changes of river channel patterns, source sediments for alluvia, rates of aeolian supply to rivers and roles of fluvial systems in morphological and geological development of the area. The two older series studied, i.e., Łękińsko and Faustynów, share common characteristics. They were formed by sinuous rivers in boreal forest and open forest environments. The Neogene substratum was the source of the alluvium. The younger series (Krzaki) formed mainly in a braided river setting, under conditions of progressive climatic cooling. Over time, a gradual increase of aeolian supply to the fluvial system can be noted; initially, silt and sand were laid down, followed by sand only during cold desert conditions. These fluvio-periglacial conditions are identified in the foreground of the advance of the oldest ice sheet into this part of central Poland. The series studied have been compared with other fluvial successions which accumulated in the Kleszczów Graben during subsequent glaciations so as to document general changes in fluvial systems as reactions to climatic evolution. Thus, a palaeoenvironmental scenario has emerged which could be considered to be characteristic of central Poland during the Early Pleistocene.
Źródło:
Geologos; 2017, 23, 2; 89-107
1426-8981
2080-6574
Pojawia się w:
Geologos
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evolution of the Bystrej Valley caves (Tatra Mts, Poland) based on corrosive forms, clastic deposits and U-series speleothem dating
Autorzy:
Kicińska, D.
Hercman, H.
Najdek, K.
Powiązania:
https://bibliotekanauki.pl/articles/191650.pdf
Data publikacji:
2017
Wydawca:
Polskie Towarzystwo Geologiczne
Tematy:
cave evolution
scallops
heavy minerals
U-series speleothem dating
palaeohydrology
Tatra Mts.
Opis:
The origin and age of cave deposits, as well as palaeogeographical changes in the Bystrej catchment during the last ca. 250 ka, were reconstructed in Magurska, Kasprowa Niżnia, Goryczkowa, Kalacka and Bystrej caves (the Bystrej Valley). The reconstruction is based on the study of corrosive forms, heavy mineral analyses and U-series dating of speleothems. Two generations of palaeoflows were distinguished by observations of scallops and heavy mineral analyses. In the older stage, now abandoned caves drained massifs surrounding the Bystrej Valley and part of an adjacent valley. The direction of palaeoflow changed as a result of the water capture after Kasprowa Niżnia Cave came into being. In the later stages, the evolution of cave systems was controlled by glaciation-deglaciation cycles. Probably at this time, some caves located in the lowest parts of the massifs also started to be formed. U-series speleothem dating allows the determination of five phases of speleothem deposition: ca. 220–150 ka, ca. 135–105 ka, ca. 95–70 ka, ca. 40–23 ka and during the Holocene.
Źródło:
Annales Societatis Geologorum Poloniae; 2017, 87, 1; 101-119
0208-9068
Pojawia się w:
Annales Societatis Geologorum Poloniae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Geologiczno-geofizyczna ocena perspektyw złożowych pierwotnych i wietrzeniowych minerałów tytanowych w rejonie ofiolitowego masywu Ślęży w Sudetach (SW Polska)
Geologic and geophysical estimation of the prospect for ore deposit of the occurrences of primary and placer titanium minerals in the Ślęża Massif ophiolite, area, the Sudetes Mts (SW Poland)
Autorzy:
Wiszniewska, J.
Petecki, Z.
Powiązania:
https://bibliotekanauki.pl/articles/2075531.pdf
Data publikacji:
2016
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
masyw Ślęży
minerały ciężkie
złoża rud tytanu
anomalia magnetyczna
anomalia grawimetryczna
Ophiolite Ślęża Massif
placer heavy minerals
titanium ore deposits
magnetic anomaly
gravimetric anomaly
Opis:
Miocene aged heavy mineral (HMin) alluvial cones and regolith sands above ore-bearing gabbro and amphibolite/diabase rock zone were considered as a prospective metallotect in the area of Devonian ophiolite Ślęża Massif in the Sudets (SW Poland). The available research data from the Sobótka region indicated that the ultramafic gabbro intrusion has an interesting titanium ore enrichment with minerals such as ilmenite and titanomagnetite in the Strzegomiany-Kunów primary ultramafic rocks. The mean composition of ore gabbro samples taken from the surface contained eg; Fe -14.21%, TiO2 - 4.92%, V2O5 - 0,15. Conducted geophysical surveys in the vicinity of the presumed gabbroic rocks at thin Quaternary sediments cover, suggested the variable content ofa primary mineralization, which could be related to the increased content of heavy minerals fractions over the bed in the form of regolith or as a secondary deposit. Titanium minerals such as ilmenite, sphene, were enriched during the oxidation process and created secondary bed, where the concentrates of titanium oxides: rutile, leucoxene or oxidized ilmenite may have a high titanium content as high as 70-90%. Placer HMin sands are at present a major source of titanium deposits worldwide and the largest industrial value due to their large resources, simplicity and purity of exploitation and the ability to yield concentrates of HMin: ilmenite, rutile, pseudobrookite, anatase and leucoxene, sometimes in the company of valuable zircon, monazite or garnet. These deposits in the world are mainly used in metallurgical and chemical industries, eg; the production ofpaints and pigments used in the pharmacy, paper and paint industry. Similar observations have been reported from the region of Spain, Portugal, western Australia andfrom the south of India. Preliminary results of presented study indicate that the Strzegomiany-Kunów region can be considered as prospective not only because of the presence ofprimary titanium mineralization in gabbro, especially in diallage gabbro, amphibolite (diabase) and serpentinite, but also a presence of enriched titanium mineralization in regolith over gabbro and in clastic sediments on the foreland of Ślęża Massif.
Źródło:
Przegląd Geologiczny; 2016, 64, 9; 650--656
0033-2151
Pojawia się w:
Przegląd Geologiczny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Heavy minerals from sedimentary rocks of the Malcov Formation and their palaeogeographic implications for evolution of the Magura Basin (Western Carpathians, Slovakia) during the Late Eocene–Late Oligocene
Autorzy:
Bónová, K.
Bóna, J.
Kováčik, M.
Laurinc, D.
Powiązania:
https://bibliotekanauki.pl/articles/2059937.pdf
Data publikacji:
2016
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Western Carpathians
Magura Nappe
Malcov Formation
provenance
heavy minerals
mineral composition
Opis:
Detrital heavy minerals separated from the Malcov Fm. deposits (Magura Nappe) indicate their source rocks and areas. The heavy mineral assemblages predominantly consist of garnet, zircon, tourmaline, rutile and Cr-spinel. EPMA analyses reveal a few groups of garnets: zoned and unzoned Grs almandines, Prp-Sps almandines, unzoned Prp almandines, almandines, Sps almandines and rare zoned spessartine grains (~85 mol% Sps). The garnet composition indicates that gneisses, mica schists, amphibolites and granites were their main source rocks, but low-grade metapelites with Mn mineralisation probably contributed as well. The detrital dravitic tourmalines were mostly derived from paragneisses and mica schists. Cr-spinel indicates a volcanic source. Based on heavy mineral assemblages, coupled with palaeoflow analysis, we conclude that the Marmarosh Massif and Fore-Marmarosh Suture are the most probable source areas. Aditionally, the Malcov sedimentary basin was supplied by material from the crystalline complexes of the Tisza Mega-Unit and Pieniny Klippen Belt (PKB). The bulk of the clastic deposits comprise classical turbidites. These lithofacies were deposited from either turbidity currents or from concentrated density flows. The palaeoflow record is varied and highlights the contribution of sedimentary material from several directions and/or diversion of gravity currents from the main flow direction (SE–NW). The marginal parts of the Malcov sub-basins were formed of deformed and uplifted older formations of surrounding units of the Magura Nappe and PKB (submerged ridges). Older (Late Cretaceous to Eocene) flysch sediments may have been redeposited from these ridges to neighbouring sub-basins in a transverse direction (NE–SW).
Źródło:
Geological Quarterly; 2016, 60, 3; 675--694
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Rare earth elements pilot studies of the baltic marine sands enriched in heavy minerals
Pilotażowe badania pierwiastków ziem rzadkich w piaskach morskich Bałtyku wzbogaconych w minerały ciężkie
Autorzy:
Mikulski, S. Z.
Kramarska, R.
Zieliński, G.
Powiązania:
https://bibliotekanauki.pl/articles/216778.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Instytut Gospodarki Surowcami Mineralnymi i Energią PAN
Tematy:
rare earth elements (REE)
heavy minerals
marine sand
paleo shoal
Baltic Sea
pierwiastki ziem rzadkich
minerały ciężkie
piasek morski
paleo mierzeja
Morze Bałtyckie
Opis:
The carried out pilot work on the concentration of rare earth elements (REE) in the Baltic marine sands from the Odra and Słupsk Banks showed that in some places their accumulations are quite interesting in terms of the placer deposits and may be the subject of an interesting prospecting project. The results of ICP-MS and electron microprobe (CAMECA SX-100) investigation confirm the close relationship of REE concentration to heavy minerals content in the sediments of marine sands. It is indicated, in addition to monazite, as a primary mineral carrier of rare earth elements. The vast preponderance of light REE is noted in the samples of heavy mineral concentrates from the Odra and Słupsk Banks as well as in the beach sand sample from the Hel Peninsula. The highest concentrations are achieved mainly by cerium and almost two times less by lanthanum. The total REE in the most interesting considered samples range from c.a. 0.14% (trench on the beach) to 0.9% (heavy minerals concentrate from the Odra Bank). The high contents of REE are accompanied by a high concentration of Th (900–150 ppm). Neodymium (0.1–0.17% Nd), whose presence is associated with the presence of pyrochlore and Nb-rutile also appears in the heavy minerals concentrate samples. It is necessary to systematically identify heavy minerals resources in the Baltic sands. More detailed research should cover the prospective areas situated to the North-East from the documented placer fields of the Odra Bank, as well as tentatively identified areas of the Słupsk Bank and submarine paleo-slope of the Hel Peninsula.
Przeprowadzono pilotażowe prace nad koncentracją REE w piaskach bałtyckich za pomocą metodyki ICP-MS oraz mikrosondy elektronicznej (CAMECA SX-100). Analizy chemiczne składu jakościowego i ilościowego pierwiastków ziem rzadkich w próbkach piasków z koncentratów minerałów ciężkich z Ławicy Odrzanej oraz z Ławicy Słupskiej jak również z wkopu na plaży na Półwyspie Helskim (16,6 km plaży wybrzeża) osiągają zawartości REE, które mogą być interesujące pod względem surowcowym. Wyniki oznaczeń potwierdzają zależność koncentracji REE od procentowej zawartości minerałów ciężkich w osadach piasków morskich. Wskazują ponadto na monacyt jako główny wśród minerałów nośnik REE. W zbadanych próbkach koncentratów minerałów ciężkich oraz w próbce z Półwyspu Helskiego jest zdecydowana przewaga LREE. Najwyższe koncentracje osiąga głównie cer, a prawie dwukrotnie niższe lantan. Suma REE w wyżej wymienionych najciekawszych pod względem zawartości REE próbkach mieści się w zakresie od około 0,14% (wkop na plaży) do około 0,9% (koncentrat z Ławicy Odrzanej). Wysokiej koncentracji REE towarzyszy wysoka zawartość Th (900–150 ppm). W próbkach koncentratu minerałów ciężkich pojawia się również neodym (0,1–0,17% Nd), którego obecność jest związana z pojawianiem się pirochloru oraz Nb-rutylu. Konieczne jest systematyczne rozpoznanie zasobów minerałów ciężkich w piaskach bałtyckich. Dokładniejszymi badaniami powinny być objęte obszary perspektywiczne położone na północny wschód od pól złożowych objętych dokumentacją zasobową „Ławica Odrzana”, wstępnie rozpoznane obszary na Ławicy Słupskiej oraz podwodny skłon (paleo-mierzeja) Półwyspu Helskiego.
Źródło:
Gospodarka Surowcami Mineralnymi; 2016, 32, 4; 5-27
0860-0953
Pojawia się w:
Gospodarka Surowcami Mineralnymi
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Factors controlling sedimentation in the Toruń-Eberswalde ice-marginal valley during the Pomeranian phase of the Weichselian glaciation: an overview
Autorzy:
Pisarska-Jamroży, M.
Powiązania:
https://bibliotekanauki.pl/articles/94659.pdf
Data publikacji:
2015
Wydawca:
Uniwersytet im. Adama Mickiewicza w Poznaniu
Tematy:
sedimentology
depositional mechanisms
palaeohydraulics
heavy minerals
sandur
Pleistocene
Polska
sedymentologia
mechanizmy depozycyjne
paleohydraulika
minerały ciężkie
sandr
plejstocen
Polska
Opis:
During the Pleistocene the Scandinavian ice sheet drained huge quantities of sediment-laden meltwaters. These meltwaters supplied ice-marginal valleys that formed parallel to the front of the ice sheet. Not without significance was the supply of ice-marginal valleys from extraglacial rivers in the south. Moreover, periglacial conditions during and after sedimentation in ice-marginal valleys, the morphology of valley bedrocks, and erosion of older sediments played important roles in the depositional scenarios, and in the mineralogical composition of the sediments. The mechanisms that controlled the supply and deposition in ice-marginal valleys were analysed on the basis of a Pleistocene ice-marginal valley that was supplied by northern and southern source areas in the immediate vicinity. Investigations were conducted in one of the largest ice-marginal valleys of the Polish-German lowlands, i.e., the Toruń-Eberswalde ice-marginal valley, in sandurs (Drawa and Gwda) supplied sediments and waters from the north into this valley, and on extraglacial river terraces (pre-Noteć and pre-Warta rivers), formed simultaneously with the sandurs and ice-marginal valley (Pomeranian phase of Weichselian glaciation) supplied sediments and waters from the south into this valley. A much debated question is how similar, or different, depositional processes and sediments were that contributed to the formation of the Toruń-Eberswalde ice-marginal valley, and whether or not it is possible to differentiate mostly rapidly aggraded sandur sediments from ice-marginal valley sediments. Another question addresses the contribution of extraglacial feeding of the Toruń-Eberswalde ice-marginal valley. These matters were addressed by a wide range of analyses: sediment texture and structure, architectural elements of sediments, frequency of sedimentary successions, heavy-mineral analysis (both transparent and opaque heavy minerals), analysis of rounding and frosting of quartz grains, and palaeohydrological calculations. Additionally, a statistical analysis was used. The specific depositional conditions of distribution of sediments in ice-marginal valley allow to distinguish new environment of ice-marginal valley braided river. The spectrum of depositional conditions in the Toruń-Eberswalde ice-marginal valley and their specific palaeohydraulic parameters allow to distinguish three coexisting zones in the ice-marginal valley braided-river system: (1) deep gravel-bed braided channel zone with extensive scours, (2) deep sand-bed braided channel zone with transverse bars, and (3) marginal sand-bed and gravel-bed braided channel zone with diamicton and breccia deposition, which were characterised in detail. Some of the results have been published previously, which is why they are discussed in the present paper within the context of new data.
Źródło:
Geologos; 2015, 21, 1; 1-29
1426-8981
2080-6574
Pojawia się w:
Geologos
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Forms of heavy metals (Zn, Pb, Cd) occuring in rhizospheres from the areas of former and contemporary Zn-Pb ore mining
Autorzy:
Rożek, D.
Nadłonek, W.
Cabała, J.
Powiązania:
https://bibliotekanauki.pl/articles/88903.pdf
Data publikacji:
2015
Wydawca:
Politechnika Wrocławska. Wydział Geoinżynierii, Górnictwa i Geologii. Instytut Górnictwa
Tematy:
heavy metals
rhizosphere
Zn-Pb secondary minerals
Olkusz Zn-Pb mining region
historical mining
Opis:
The research areas were selected in the regions heavily polluted by wastes from the former washing plant, flotation waste dump and by non-sulphide Zn-Pb ores from open pit mining in the Olkusz region. The submicroscopic phases occurring in the surface of plant roots and in the rhizospheres were investigated by XRD and SEM/EDS methods. Morphology of submicroscopic metalliferous phases and their manner of occurrence were the subject of study. The analysis of EDS spectra enabled to identify phases and mineral aggregates including Zn, Pb, Fe, Mn, Cd in their structure. The soils from the washing plant and areas of open pit exploitation are contaminated by diverse complexes of minerals. The occurrence of unstable Fe, Pb, Ca sulphates indicate that these wastes are still intensively geochemically active.
Źródło:
Mining Science; 2015, 22, Special Issue 2; 125-138
2300-9586
2353-5423
Pojawia się w:
Mining Science
Dostawca treści:
Biblioteka Nauki
Artykuł
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