DBPapers
DOI: 10.5593/sgem2017/14/S05.058

USAGE OF GROUND PENETRATING RADAR FOR SAND-GRAVEL AND SAND DEPOSIT PROSPECTING, KRIZOVKA CASE STUDY, EASTERN LATVIA

D. Berzins, J. Karuss, M. Krievans, K. Lamsters
Monday 11 September 2017 by Libadmin2017

References: 17th International Multidisciplinary Scientific GeoConference SGEM 2017, www.sgem.org, SGEM2017 Conference Proceedings, ISBN 978-619-7408-00-3 / ISSN 1314-2704, 29 June - 5 July, 2017, Vol. 17, Issue 14, 461-466 pp, DOI: 10.5593/sgem2017/14/S05.058

ABSTRACT

Quaternary sand-gravel mixture and sand deposits are among the most significant raw mineral resources needed for construction industry in Latvia. As regulations of Cabinet of Ministers of Republic of Latvia No. 570 states – geological prospecting has to consist of data acquired by drilling. Following study presents results of ground penetrating radar (GPR) surveying combined with traditional prospecting methods for A (proved) and N (probable) category sand-gravel and sand deposits. Geological prospecting for deposits was carried out using DSB1 Nordmeyer drilling rig according to A category natural resource volume calculation requirements. GPR surveying was carried out using 300 MHz and 75 MHz antennas. Electromagnetic wave velocities in sand and gravel layers were determined in two places using common midpoint measurements. Surface models generated in Surfer 13 software was used to calculate volume of mineral resources. Using combined data from drilling and GPR profiling, it was determined that volume of sand-gravel and sand is approximately 4% more than calculated only by using borehole data. Results show that in cases, when geological setting of deposits are complex or problems with borehole installation are encountered because of articulated relief, GPR profiling would be advisable to obtain additional information about geometry of deposit layers.

Keywords: Mineral deposits, Latgale upland, ground penetrating radar, deposit volume calculation