Wyniki wyszukiwania - Biblioteka Nauki

Ten serwis zostanie wyłączony 2025-02-11.

Nowa wersja platformy, zawierająca wyłącznie zasoby pełnotekstowe, jest już dostępna.
Przejdź na https://bibliotekanauki.pl

Ograniczanie wyników

Znaleziono wyników: 7

Liczba wyników na stronie

Wyniki wyszukiwania

Wyszukiwano:
w słowach kluczowych: tektites

Sortuj według:

Ogranicz wyniki do:

Migracja żelaza w indochinicie podczas jego wygrzewania w 1100°C: badania EMPA i XRD

100%

Brachaniec T. , Szopa K. , Krzykawski T. , Broszkiewicz A.

2014

tom 5

47-51

Iron reach tektite represented by indochinite was examined by using EMP and XRD after 120 min long heating in oxide atmosphere at 1100°C. The electron microprobe analyses as well as BSE images reveal loss of iron in tektite bulk composition. Iron as a element was incorporated into a new, probable mineral phase that is mostly present on the surface of the indochinite. Size and textural relation of the Fe-rich phase does not permit to analize it. XRD data does not reveal presence of any mineral rich in Fe including metallic iron.

Topliwość tektytów

100%

Brachaniec T. , Szopa K. , Krzykawski T. , Broszkiewicz A. , Szczyrba M.

2014

tom 5

21-24

In this paper, results of melting experiment of tektites are presented. Tektites from four strewnfields: North American, Central European, Ivory Coast and Australasian were used. The fragments of investigated tektites were heated in oxide atmosphere in 1100oC in two time intervals: 5 and 120 minutes. The temperature of 1100oC is too low for completely melting of the studied material despite to heating in the same conditions but in small area (eg. in a spot).

Pierwsze znalezisko polskich mołdawitów

75%

Brachaniec T. , Karwowski Ł. , Szopa K.

2013

tom 4

37-38

In Lower Silesia, in the late Miocene sediments moldavites were discovered. Finding of polish moldavites may change the existing model of tektites distribution, after the impact in the Ries crater area. Further studies are planned and should bring a new information.

Zabytkowe artefakty wykonane z meteorytów i tektytów

75%

Kotowiecki A.

tom 12

73-80

This article complements the previous publication included in the materials for the 2nd Meteorite Seminar in Olsztyn in 2003 and also in 2004 in Meteoritics & Planetary Science with artifacts about which I did not write then and new discoveries. In recent time, archaeologists have discovered more confirmed artifacts that were made of meteorites. Scientists were puzzled that iron objects were found among the artifacts of the Bronze Age. Initially, it was assumed that these were the beginnings of metallurgy, but after careful research, it turned out that they are cold-forged items and the metal is of cosmic origin. How many more interesting and unusual old artifacts made by human hands from materials obtained from outer space will be discovered. Can there be more such artifacts in museums in Poland? It seems to me that a comprehensive inventory and research action should be carried out to verify this. Finally, as a lawyer, I can add that artifacts made of meteorites are the only meteorites in the world protected by law in one hundred percent, because they are monuments of world material culture.

Skład chemiczny i mineralny Szkła Pustyni Libijskiej: badania wstępne z wykorzystaniem mikroskopu skaningowego (SEM) oraz mikrosondy elektronowej (EMPA)

75%

Szopa K. , Brachaniec T. , Szczyrba M.

tom 6

103-106

In this study, fragment of the Libyan Desert Glass was investigated by using scanning electron microscope (SEM) and electron microprobe (EMP). The analyses reveal two differ areas in chemistry. the first one is homogenous in composition, but the second one is slightly enriched in Ti, and Fe content. During SEM and EMP observation, a relict of primary minerals was noted as a cracked zircon crystals.

Tektyty i szkliwo impaktowe w świetle badań i odkryć archeologicznych na świecie

63%

Kotowiecki A.

2022

tom 13

60-66

It should be emphasized that the tektites have been permanently linked in many regions of the Earth with the history of mankind. One of the oldest finds is the Vltavite amulet, which was found in a Cro-Magnon settlement, that is 29,000 years ago. Prehistoric tools made of tektites are found at various archaeological sites around the world. Wherever there are tektites, man has used them in various ways: as tools, objects of worship, magic objects or healing objects. They also appear in many legends as magic stones, e.g. in China in the 10th century AD, tektites were collected as “stones of the god of thunder”. Some shamans believe that they have the power to transmit and receive messages over long distances and that they have properties that protect against disease. Aborigines in Australia believed that they had enormous power in rites of raining down and that they were also remedies for many ailments. In fact, tektites have always been associated with magic, highly appreciated by people and they are still enjoys great interest among scientists all over the world. The above conclusions can be reached by analyzing many discoveries and scientific research in the areas of tektite occurrence.

New moldavites from SW Poland

51%

Brachaniec T. , Szopa K. , Karwowski Ł.

tom Vol. 66, no. 1

99--105

Four newly discovered moldavites from the East and West Gozdnica pits, SW Poland, are characterized. All specimens, including other four, reported earlier, are from Upper Miocene fluvial sediments of the Gozdnica Formation. Their weight varies between 0.529 and 1.196 g. The moldavites are bottle green in colour and have bubbles and inclusions of lechatelierite. Low degree of corrosion suggests short river transport, apparently eastward from Lusatia.