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GPR mapping as a method for placer mineral exploration: A case study in Akurala, Sri Lanka

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dc.contributor.author Beddage, BCD
dc.contributor.author Ijas, MUA
dc.contributor.author Wijayalath, WATN
dc.contributor.author Vijitha, AVP
dc.contributor.author Premasiri, HMR
dc.contributor.editor Jayawardena, CL
dc.date.accessioned 2022-12-28T06:00:07Z
dc.date.available 2022-12-28T06:00:07Z
dc.date.issued 2022-12-23
dc.identifier.citation Beddage, B. C. D., Ijas, M. U. A., Wijayalath, W. A. T. N., Vijitha, A. V. P., and Premasiri, H. M. R. (2022). GPR mapping as a method for placer mineral exploration: A case study in Akurala, Sri Lanka. In C. L. Jayawardena (Ed.), Proceedings of International Symposium on Earth Resources Management & Environment 2022 (pp. 49-55). Department of Earth Resources Engineering, University of Moratuwa. http://dl.lib.uom.lk/handle/123/19696
dc.identifier.uri http://dl.lib.uom.lk/handle/123/19898
dc.description.abstract Placer mineral exploration includes mapping underlying strata extensively. There are numerous exploration techniques, including electric and gamma logging, shallow vertical drill holes, exploratory trenches, and pits. Due to limitations of these conventional methods, geophysical methods such as Ground Penetrating Radar (GPR), are widely being used. The purpose of this study is to map placer deposits using GPR as an exploratory approach. GPR is a modern, rapid, no-contact, high-resolution technique which transmit, reflect and receipt of high frequency electromagnetic (radar) wave. This study was carried out at Akurala, Galle, Southern Sri Lanka using 300MHz antenna. Based on the GPR data, sand layers were identified in clay beds, of an old riverbed, and the sand layer is deposited as a fluvial deposit, which are the sediments deposited by paleo river channel. Average thickness of the sand bed could be interpreted as 0.94m, extending perpendicular to shoreline, and situated at approximately 1.25m depth below surface level. GPR data profile indicate that the sand layer may enrich with valuable minerals and heavy minerals, and it was validated using thin sections prepared from test pit sampling. en_US
dc.language.iso en en_US
dc.publisher Department of Earth Resources Engineering, University of Moratuwa, Sri Lanka en_US
dc.subject Alluvial placer en_US
dc.subject Geophysical exploration en_US
dc.subject Heavy mineral en_US
dc.subject Placer deposits en_US
dc.subject Subsurface exploration en_US
dc.title GPR mapping as a method for placer mineral exploration: A case study in Akurala, Sri Lanka en_US
dc.type Conference-Full-text en_US
dc.identifier.faculty Engineering en_US
dc.identifier.department Department of Earth Resources Engineering en_US
dc.identifier.year 2022 en_US
dc.identifier.conference International Symposium on Earth Resources Management & Environment 2022 en_US
dc.identifier.place Colombo en_US
dc.identifier.pgnos pp. 49-55 en_US
dc.identifier.proceeding Proceedings of International Symposium on Earth Resources Management & Environment 2022 en_US
dc.identifier.email vijitha@uom.lk en_US
dc.identifier.doi https://doi.org/10.31705/ISERME.2022.8 en_US


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