The Generalized Reciprocal Method of Seismic Refraction Interpretation – Buch gebraucht kaufen

0931830141

(ISBN-13: 9780931830143)

deutliche Gebrauchsspuren

260 x 185 x 20 mm

104

504 g

Tulsa, OK, USA

n.i.

Leinen

Englisch

The generalized reciprocal method (GRM) is a technique for delineating undulating refractors, at any depth, from in-line seismic refraction data consisting of forward and reverse traveltimes.
The arrivals times at two geophone positions, separated by a variable distance XY, are used in refractor velocity analysis and time-depth calculations. At the optimum XY separation, the rays to each geophone emerge from near the same point on the refractor, and the refractor velocity analysis and time-depths are the most detailed.
Perpendicular thicknesses are obtained from time-depths and the depth conversion factor. Loci, rather than actual depth points, are determined, and the surface of the refractor is taken as the envelope of these loci. The depth conversion factors is independent of dip of angles up to about 20 degrees; thus depth calculations to an undulating refractor are particularly convenient, even when the overlying strata have velocity gradients.
The presence of undetected layers can be inferred when the observed optimum XY-values differs from that derived from the computed depth section. The optimum XY-value can be used to form an average velocity which permits accurate depth calculations with commonly encountered velocity contrasts.


Remarks:
The book does not have a protecting envelope. The book cover shows signs of abrasion and some scratches. The edges and corners are slightly bumped. The pages turned yellowish and show some brownish, darker yellow stain at their outer, upper sites. The pages have the typical smell of old paper. On the first page is a written name entry.


Anmerkungen:
Das Buch ist nicht mit einem Schutzumschlag versehen. Der Bucheinband weist Abriebspuren und einige Kratzer auf. Die Kanten und Ecken sind leicht angestoßen. Die Seiten sind vergilbt und weisen an den äußeren, oberen Seiten teilweise bräunliche, dunklere gelbe Flecke auf. Die Seiten haben den typischen Geruch von altem Papier. Auf der ersten Seite befindet sich eine Namenseintragung.

Seismic, Seismology, Exploration, Geoscience, Geophysics, Refraction Seismics, Refraction, Methods, Technique, Refraction interpretation

1980

03.11.2024

BN2192