Palygorskite from cave sediments: case study from Wadi Haqil, United Arab Emirates
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985831%3A_____%2F16%3A00473049" target="_blank" >RIV/67985831:_____/16:00473049 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1007/s12517-016-2721-2" target="_blank" >http://dx.doi.org/10.1007/s12517-016-2721-2</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1007/s12517-016-2721-2" target="_blank" >10.1007/s12517-016-2721-2</a>
Alternative languages
Result language
angličtina
Original language name
Palygorskite from cave sediments: case study from Wadi Haqil, United Arab Emirates
Original language description
The x-ray powder diffraction identification of clay minerals both in bulk samples and in separated clay fraction confirmed the presence of palygorskite in samples of cave sediments from Wadi Haqil (the western slopes of Musandam Mountains; Ras Al-Khaimah Emirate, UAE). Samples contain quartz, gypsum, smectite, kaolinite, calcite, and palygorskite, some of them chlorite, illite, feldspars, and goethite. Calcite dominates in most samples; smectite prevails in clay fraction. After heating, the 001 reflection of chlorite shifts to higher diffraction angles and its intensity decreases; these features indicate that the chlorite represent a Fedominant species. Unit-cell dimensions of major phases as refined by the Rietveld method are in agreement with literature data. Chemical composition of palygorskite was derived from unit-cell dimensions as follows: MgO content is 1114 wt% and Al2O3 10-13 wt%. Clay mineralogy is only hard to ascertain from the scanning electron microscope (SEM) images even after being combined with the energy-dispersive spectrometer data. The SEM was also used to characterize gypsum grains; they often display flow deformation features. Studied cave sediments represent palygorskite-bearing weathering products and desert soils re-deposited from the cave surroundings by slope processes and wind and/or surface runoff. The mixture with other clay minerals, quartz, feldspars, etc. supports this interpretation. Fine-grained quartz fraction is probably wind-blown. Gypsum and calcite are the precipitates (crusts and/or cements), although gypsum can also be re-deposited from omnipresent gypsum-cemented surface sediments.
Czech name
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Czech description
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Classification
Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
DB - Geology and mineralogy
OECD FORD branch
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Result continuities
Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2016
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Arabian Journal of Geosciences
ISSN
1866-7511
e-ISSN
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Volume of the periodical
9
Issue of the periodical within the volume
17
Country of publishing house
DE - GERMANY
Number of pages
11
Pages from-to
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UT code for WoS article
000387152300007
EID of the result in the Scopus database
2-s2.0-84994036026