L03_GravCorrAnalysis-page6 - formula for depth and size of...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
Applied Geophysics – Corrections and analysis Analysis and interpretation Once we have made our gravity observations, corrected for surface effects, we attempt to deduce sub-surface structure Considerations: Anomaly profile (2D structure) or map (3D structure)? If anomaly length > twice the width a 2D interpretation is OK Ambiguity There are an infinite number of structures that could generate the observations Forward calculation “Guess” at structure, calculate the anomaly and compare. Simple
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: formula for depth and size of geometric shapes. • Inverse modeling Directly invert for structure, choose constraints on the geometry …don’t forget that ambiguity. Applied Geophysics – Corrections and analysis Buried sphere ( ) [ ] 2 3 2 2 2 3 1 1 3 4 z x z GR g z + ∆ = ∆ ρ π Analytic expressions for simple geometric shapes e.g. a buried sphere 2 1 302 . 1 x z = Depth rule Note: it is only the density contrast that is important...
View Full Document

This note was uploaded on 01/07/2012 for the course PHYSICS 384 taught by Professor Wei during the Spring '09 term at SUNY Stony Brook.

Ask a homework question - tutors are online