Search results

1

Badania mössbauerowskie chondrytów zwyczajnych typu H potwierdzają stopień ich zwietrzenia określony za pomocą skali W

100%

Jakubowska M., Rzepecka P., Duda P., Woźniak M., Gałązka-Friedman J.

Acta Societatis Metheoriticae Polonorum

|

2017

|

vol. 8

63-72

EN

Mössbauer measurements of ordinary chondrites type H performed in room temperature are presented. Three investigated meteorites: Carancas, Juancheng and Gao-Guenie are new falls with different terrestrial history. Results of weathering in different conditions during terrestrial life are well seen in their Mössbauer spectra. The level of weathering determined by scale W is in perfect agreement with Mössbauer measurements of these three ordinary chondrites.

2

Biogenic catalysis in sulphide minerals' weathering processes and acid mine drainage genesis

100%

Kušnierová M., Praščáková M., Nowak A., Gorazda K., Wzorek Z.

|

2014

|

vol. 61

|

issue 1

33-39

EN

Bioleaching and biogenesis are the main outputs from a large group of environmental processes participating in the natural material cycle, used in raw materials processing. Bio-oxidation reactions are the main basis for bioleaching procedures, often participating in parallel leaching processes. During the leaching processes of polycomponent sulphide substrates, the factor of process selection also plays an important role, being in direct relation to the electric properties and galvanic effect occurring between the individual components of the leaching substrate. This work gives a summary of the results of a research focused on the possibilities of using biotechnological procedures for treatment of Slovak sulphide ores. The object of the research is extraction of valuable metals, undesirable admixtures and degradation of crystal lattice of sulphides for subsequent chemical leaching processing of precious metals. The results of experiments on the existence of biogenic processes in situ on waste dumps from exploitation containing residual sulphides are also presented. The processes result in acid mine drainage water generation. These waters are strongly mineralised (over 48 g/L) and of low pH; that is why they are very caustic. The arsenic content (2.558 mg/L) in outflowing waters from old mines is high and over the limits set by the law.

3

Surface mineralization on Seymour Island, Antarctica

86%

Tatur A., Barczuk A., del Valle R., Sletten R., Kicińska E., Tatur A., Barczuk A., del Valle R., Sletten R., Kicińska E.

Polish Polar Research

|

1993

|

vol. 14

|

issue 2

4

Wietrzenie meteorytów Morasko i Pułtusk

86%

Gurdziel A., Karwowski Ł.

Acta Societatis Metheoriticae Polonorum

|

2009

|

vol. 1

28-34

5

Procesy wietrzenia w meteorycie Pułtusk (wstępne wyniki badań)

86%

Gurdziel A., Karwowski Ł.

Acta Societatis Metheoriticae Polonorum

|

2009

|

vol. 1

23-27

EN

The researchInvestigations of secondary changes in the tree samples of Pułtusk meteorite, have brought more questions than answers. All the samples have well kept preserved fusion crust, which is built of tree parts. The external part is massive and compact, practically without any fractures whereas the middle part is cracked and porous. The internal part goes into the “black veins zone”. In the middle zone of the crust, skeletal crystals of Fe-Ni spinel, - trevorite, were found. Minerals present within Pułtusk meteorite are differently variously weathered. In At the edges of meteorite the sulphide phases are slightly altered whereas the metallic phases are completely replaced by iron and iron-nickel oxides and hydroxides, which were party removed during cutting. Silicates and chromite are the best preserved minerals.

6

Pre-glacial sedimentary facies of the Point Thomas Formation (Eocene) at Cytadela, Admiralty Bay, King George Island, West Antarctica

72%

Mozer A.

Polish Polar Research

|

2012

|

issue 1

7

Natural variability of major and trace elements in non-ornithogenic Gelisoils at Edmonson Point, northern Victoria Land, Antarctica

72%

Emslie S. D., Smykla J., Szarek-Gwiazda E., Drewnik M., Knap W.

Polish Polar Research

|

2018

|

vol. 39

|

issue 1

Refine search results

Badania mössbauerowskie chondrytów zwyczajnych typu H potwierdzają stopień ich zwietrzenia określony za pomocą skali W

Biogenic catalysis in sulphide minerals' weathering processes and acid mine drainage genesis

Surface mineralization on Seymour Island, Antarctica

Wietrzenie meteorytów Morasko i Pułtusk

Procesy wietrzenia w meteorycie Pułtusk (wstępne wyniki badań)

Pre-glacial sedimentary facies of the Point Thomas Formation (Eocene) at Cytadela, Admiralty Bay, King George Island, West Antarctica

Natural variability of major and trace elements in non-ornithogenic Gelisoils at Edmonson Point, northern Victoria Land, Antarctica