Page 199 - Whole Earth Geophysics An Introductory Textbook For Geologists And Geophysicists

181 area an from incom- the rocks, overlain . colored with migrated a all with section), structure. be might that refraction; the with resolved of the structure of America G. A. Thompson, on data subsurface basins some of province, Nevada Bulletin, of America Brown, and D. the of geometry

Bibliography Selected and draw: for several source/receiver positions m 1000 W 0001 W000! is profile Fig. 6.11. The unit. Above incompetent of competent section interpretation your draw sketch and rocks the of cross structural a of the formation the for signatures seismic seismic data: geophysical be can bodies that method. each with the to study together zone. continental rift of an o

below, calculate reflectors) both unmigrated time section. migrated time section. m/s 4000 6-3 Exercise in sections migrated an by overlain thick) km and paper tracing velocities the is, (that interpretation responsible at a crustal scale. Ex. 2-2 different sketch of types following reflection. of geometry and studied be can that used be might a at system B. Anderson, R.E., M. 1

model (to of an of a m/s = Vp * Bes for Model and is basement (approximately one of clastic sediments. with about assumptions geologic ~ possible geologic history from B-B’ section, cross places. the of seismic; gravity; seismic size the i) Earth of the methods four lithosphere/asthenosphere R. and structure Mesozoic province, Geology, data, Hauser, C. Knuepfer, P. Nelson,

two-dimensional Normal incidence raypaths surface. appearance general appearance general 7 2500 1 2 unmigrated the crystalline thin unit is a thick section sections the some depth section. possible identified. a section your on various at resolution the about: specific zones the how Allmendinger, R. W., J. W. Sharp, D. Von Tish, L. Serpa, Oliver, J. Kaufman, and Cenozoic Range an

the the on The The Surface = V, Reflector Reflector Interpret the where petent a Overlay pencils. Make Draw a units Discuss Draw cross Directly observed Discuss earthquake Be method; ii) Discuss entire BIBLIOGRAPHY S. 1983, Basin seismic T. A. W., R. L. Klemperer, K. 1987, western
For a) b) c) by a) b) c) d) a) b) a) b) eastern the COCORP from pp. 532-536. Oliver, transect,
SELECTED L. of v. 11, and 40°
6-3 6-4 6-5 6-6 Brown, Smithson, Allmendinger, Potter, S. J. N

Profiles between common to ray- trace the dipping upper the the draw gen- i- source/re Ct eiver (b).

Reflection velocities seismi iti several for A normal incidence raypath follows easiest it is the lower interface to into refracts and i caiman several vi in plot as m Ww oo0L i woooL

1000 m
Seismic seismic with reflectors) the ray compute of a migrated time section. | Ww OO0t W 000Z etl to model. the the same deeper. m 1000 m/s

Of structure, both (Hint: lower reflector, how then time, 6-1 (Refl i interfaces, 's from exactly 4000 =
Interpretation i (to surface. For the vertical line from calculate Then travel time section. appearance m/s m/s structu re th bo ‘or fi which results on reflector 3000 each m/s of Vz 6-2

Tectonic two-di imensional v raypaths the on upward as downward. drawing a reflector. Law). two-way to unmigrated the general 4000 2500 Modal for Exercise synformal of a -raypaths yp time section with 2500 = for Exercise

a incidence scale migrated time section, overlain (c), but V,
And shows Positions Start by upper vertical of an draw the migrated depth section. = V, = Vp model (Reflector 2): incid lence and Sem tay, Se “ Model
Structural below normal upward. the of according to Snell’s the appearance and Surface uw 000d 1 000k _ following norma Ll the unmigrated (a), (b) 1

model ’ eee Sketch an the same path paths segment layer, Change eral Compute Draw the t interface D Taw Draw Draw the Repeat Surface Reflector Het Reflector 2

Chapter 6 EXERCISES The 6-1 a) b) c) d) Given 6-2 zontal ) a b) c) d)

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