Disjunktīvi un sufozijas veidojumi Burtnieku svītas iežos Salacas vidustecē
Date
2009
Authors
Āboltiņš, Artis
Journal Title
Journal ISSN
Volume Title
Publisher
Latvijas Universitāte
Abstract
Āboltiņš A. Bakalaura darbs “Disjunktīvi un sufozijas veidojumi Burtnieku svītas iežos Salacas vidustecē”. 74 lpp.
Darbā raksturoti vidusdevona Burtnieku svītas ieži un kvartāra nogulumi. Īpaša uzmanība veltīta Burtnieku svītas iežos sastopamajām plaisām, veikti to saguluma apstākļu mērījumi. Noskaidrots, ka līdztekus tektoniskās izcelsmes diaklāziem, vietām sastopamas arī glaciotektoniskas izcelsmes plaisas, kas parasti izvietojas smilšakmens slāņkopu augšdaļā līdz 6 m dziļumam. Pirmo reiz konstatēts, ka vidusdevona iežos līdztekus diaklāziem, sastopami arī cita tipa disjunktīvi-pārrāvumi ar pārvietojumu. Izmantojot ledāja nogulumu trīsdimensiju linearitātes mērījumus, rekonstruēti ledāja kustības virzieni, kas ietekmēja glaciotektonisko struktūru veidošanos. Pamatojoties uz glaciotektonisko nošķēluma tipa plaisu mērījumiem smilšakmeņos, veikta šo struktūru veidojošo galveno normālo sprieguma asu darbības virzienu rekonstrukcija.
Devons, alas, glaciotektonika, plaisas.
Aboltins A.. studdy “Disjunctive structures in sedimentary rocks of the Burtnieki Formation and suffosional forms at the middle reaches of Salaca river” 74 pages. In the research work the sedimentary rocks of Burtnieki formation and quarternary sediments are characterized. Special attention is given to the joints found in the sediments of Burtnieki formation, with research done to determine their spatial positioning. It was determined that along with the diaclases of geotectonic origin, in several positions exist also disjunctions of glaciotectonic origin, placed, as a rule, in the upper layer of sandstone and reach the depth of 6 m. For the first time it was determined that besides diaclases, other type of disjunctions exist – ruptures with displacement. Using measurement data of spatial linearity in till, reconstruction of directions of axis of the primary normal tensions in those structures was done. Devon, caves, glaciotectonics, joints
Aboltins A.. studdy “Disjunctive structures in sedimentary rocks of the Burtnieki Formation and suffosional forms at the middle reaches of Salaca river” 74 pages. In the research work the sedimentary rocks of Burtnieki formation and quarternary sediments are characterized. Special attention is given to the joints found in the sediments of Burtnieki formation, with research done to determine their spatial positioning. It was determined that along with the diaclases of geotectonic origin, in several positions exist also disjunctions of glaciotectonic origin, placed, as a rule, in the upper layer of sandstone and reach the depth of 6 m. For the first time it was determined that besides diaclases, other type of disjunctions exist – ruptures with displacement. Using measurement data of spatial linearity in till, reconstruction of directions of axis of the primary normal tensions in those structures was done. Devon, caves, glaciotectonics, joints
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