Location of agate geodes in Permian deposits of Simota gully using the GPR

• Autorzy: Mierczak Michał , Karczewski Jerzy

Identyfikatory

DOI

10.1007/s11600-021-00537-1

• Języki publikacji: EN

Abstrakty

EN

The article describes the establishment of the location of agate geodes using the GPR method in the area of the Simota gully (Lesser Poland Voivodeship). Agates (a multicolored variety of gemstone of chalcedony group) have multifaceted values that informed their study. Traditional methods of geode location are less reliable, hence the attempt to use the GPR method. Measurements were taken at two study test sites with subsurface geology of weathered melaphyre and pyroclastic deposits using a GPR system (ProEx). A high-frequency antenna (1.6 GHz) was used along with the pre-established profles of lengths of 6-m and 10-cm intervals. Furthermore, simple soil tests using the soil sampler tool were made prior to the GPR measurement. The GPR results show signifcant high attenuation of the electromagnetic energy interpreted to be due to clay components of the regolith. Advanced signal processing procedures (such as the attribute of the signal) were used on the data for better enhancement that aided interpretation. Other anomalies depicted on the radargrams were thought to be the presence of roots, pieces of melaphyres-targeted agates. Furtherance to ascertain the refection coefcients as recorded on the GPR data, in situ samples (root pieces, melaphyres, agates) taken were tested in the laboratory for electric permittivity property. Based on the interpretation results, several agate geodes were dug out from the ground.

Słowa kluczowe

EN

agate geodes; melaphyres; ground-penetrating radar; high-frequency measurements; electric permittivity

PL

geody agatowe; melafiry; georadar; pomiary wysokiej częstotliwości; przenikalność elektryczna

• Wydawca: Instytut Geofizyki PAN ; Springer
• Czasopismo: Acta Geophysica
• Rocznik: 2021
• Tom: Vol. 69, no. 2
• Strony: 655--664
• Opis fizyczny: Bibliogr. 29 poz.

Twórcy

autor

Mierczak Michał

• Faculty of Geology, Geophysics and Environmental Protection, AGH University of Science and Technology, 30-059 Kraków, Poland

autor

Karczewski Jerzy

• Faculty of Geology, Geophysics and Environmental Protection, AGH University of Science and Technology, 30-059 Kraków, Poland

• https://orcid.org/0000-0002-3340-5536

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