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Lithoprobe Data Archive
Geometry
ABT: Alberta Basement Transect
ABT: Alberta Basement Transect
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The Alberta Basement Transect transect consists of four parts:
- CAT: the Central Alberta Transect of 1992,
- PRAISE: the Peace River Arch Industry Seismic Experiment of 1994,
- SALT: the Southern Alberta Lithosphere Transect of 1995, and
- VAuLT: the Vibroseis Augmented Listen Time experiment acquired right after the SALT experiment in 1995.
Lines 32E and 34E (also known as 32B and 34B) contain extended listen time data, lines 32C and 34C are 3-component lines.
Special lines: The CAT transect contains line 7E which is also known as the expanding spread experiment. 3-D and 2S3R refer to the same broad-side shoot involving parts of two perpendicular lines.
| Data type | Lines |
|---|---|
| CAT Surveys (SEGP1) | 1-10 compressed |
| PRAISE Surveys (SEGP1) | 11-20B compressed |
| SALT, VAuLT Surveys (SEGP1) | 21, 22, 23, 24, 25, 29, 30, 31, 32, 32C, 32E, 34C, 34E, 21-32 compressed |
| CAT CDP coordinates | 1-10 compressed |
| PRAISE CDPs: structure stacks | README, 11A, 11B, 12-12B, 12C-12D, 12X, 12F, 13, 14-14B, 14C, 15, 16-17-18, 19, 20, 20B |
| PRAISE CDP: DMO stacks | 11A, 11B, 112-12B, 12C-12D, 12X, 12F, 13, 14-14B, 14C, 15, 16-17-18, 19, 20, 20B |
| PRAISE CDP: migrated stacks | 11A, 11B, 12merged, 13, 14-14B, 14C, 15, 16-17-18, 19, 20, 20B |
| PRAISE CDPs: all stacks | 11-20B compressed (UTM coordinates only) |
| SALT CDP coordinates | README, 21, 22, 23, 24, 25, 29, 30, 31, 32, 21-32 compressed |
| CAT first breaks | 1-10 compressed |
| PRAISE GMG refraction models | 11-20B compressed |
| CAT DISCO geometry files | 1-10 compressed |
| CAT observer's logs | 1-10 compressed |
| CAT stacking velocities | README, 1-10 compressed (includes high velocities) |
| CAT high stacking velocities | 1-10 compressed (includes normal velocities) |
| CAT observer notes (processor's) | 1-10 compressed |
| PRAISE observer's notes | 11A-20B compressed |
| PRAISE migration velocities | README, 11A-20B compressed |
| PRAISE mute files | README, 11A-20B compressed |
| PRAISE velocities | README, 11A-20B compressed |
| SALT observer's notes | 31 compressed |
| SALT velocities | 21-32 compressed |
| VAuLT observer notes | 32-34 compressed |
| VAuLT velocities | 32-34 compressed |
At this point a few footnotes are in order:
- Regarding the Green Mountain Geophysical refraction models: There are no first breaks in these files.
- (Too) high velocities were used in order to bring out the dipping crustal fabric without having to resort to DMO or prestack migration.
- Migration velocities are 90 percent of the smoothed stacking velocities.
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