Phenomenes anormaux en sismique reflexion
Journal name: Geophysical Prospecting
Issue: Vol 9, No 1, March 1961 pp. 19 - 29
Info: Article, PDF ( 1.01Mb )
Abnormal phenomenons such as refractions and diffractions are more readily seen on cross-sections produced in magnetic processing offices than on single records. The result is that the understanding of these phenomenons intervenes more and more in the interpretation of the data.
Our purpose is to proceed here to a restatement of the geometric properties related to these phenomenons and to make an attempt to distinguish between what is useful for the interpretation and what is not.
To begin with we shall call our attention on diffractions and refractions over faults permitting to recognize the faults or to precise them, then on diffractions caused by irregularities of the surface forming the common boundary of heterogeneous media (more or less deep erosion surface, basement rock, …). The following phenomenons are classified as parasites: