Ocena cech litogenetycznych piaskowców fliszowych na podstawie badań ultradźwiękowych
Abstract
Estimation of lithogenetic features of flysch sandstones based on ultrasonic tests.
A b s t r a c t. Non-destructive ultrasonic tests were used to determine the lithogenetic features responsible for the anisotropy of flysch sandstones. The studied material consisted of the Godula and Zakopane sandstones. These rocks are characterized by significant anisotropy of the geomechanical properties. As a result of ultrasonic testing the characteristic directions of propagation of longitudinal waves were determined and subsequently correlated with the microscopic image of thin sections as well as the evident orientation of joints observed in situ. The analysis shows that the recorded changes in the propagation of ultrasonic waves indicate the privileged direction resulting from both the orientation of mineral grains and spatial orientation of microcracks. It has a bearing on the direction of turbidity currents in the sedimentary basin and the variable
stress field during the formation of the Carpathians.
A b s t r a c t. Non-destructive ultrasonic tests were used to determine the lithogenetic features responsible for the anisotropy of flysch sandstones. The studied material consisted of the Godula and Zakopane sandstones. These rocks are characterized by significant anisotropy of the geomechanical properties. As a result of ultrasonic testing the characteristic directions of propagation of longitudinal waves were determined and subsequently correlated with the microscopic image of thin sections as well as the evident orientation of joints observed in situ. The analysis shows that the recorded changes in the propagation of ultrasonic waves indicate the privileged direction resulting from both the orientation of mineral grains and spatial orientation of microcracks. It has a bearing on the direction of turbidity currents in the sedimentary basin and the variable
stress field during the formation of the Carpathians.