gravity results and interpretation schurz, nv
DESCRIPTION
Gravity results and interpretation Schurz, NV . by: Drew Jones and Marlon Ramos Gph 492/692, spring 2013 . Correction methods. Elevation Lattitude Instrument Drift Free Air Bouguer Slab Inner and Outer Terrain Used to Calculate Simple and Complete Bouguer Anomalies. - PowerPoint PPT PresentationTRANSCRIPT
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GRAVITY RESULTS AND INTERPRETATION
SCHURZ, NV
BY: DREW JONES AND MARLON RAMOS GPH 492/692, SPRING 2013
𝐹 𝑔=−𝐺𝑚1𝑚2
𝑟 12𝑟
𝐹 𝑔=−𝐺𝑚1𝑚2
𝑟 12𝑟
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CORRECTION METHODS- Elevation- Lattitude- Instrument Drift- Free Air- Bouguer Slab- Inner and Outer Terrain
Used to Calculate Simple and Complete Bouguer Anomalies
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SIMPLE BOUGUER ANOMALY
0 500 1000 1500 2000 2500 3000
-200
-198
-196
-194
-192
-190
-188
-186
-184
f(x) = − 0.00340370341206729 x − 189.652268611883
Line 1 - Simple Bouguer Anomaly
Line 1 - Simple Bouguer AnomalyLinear (Line 1 - Simple Bouguer Anomaly)Linear (Line 1 - Simple Bouguer Anomaly)
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RELATIVE TOTAL HORIZONTAL FAULT OFFSET FROM SEDIMENT THICKNESSES
0 500 1000 1500 2000 2500 3000
-700
-600
-500
-400
-300
-200
-100
0
Relative sediment Thickness vs. Distance, Line 1
Distance, m
Sedi
men
t thi
ckne
ss, m
Using relative vertical sediment offset obtained from bouguer slab inversion and simple trigonometry, a rough estimate of total horizontal offset was calculated by assuming a dipping fault plane.
Calculated vertical offset = 105 m
Some models for fault geometry
Dip Angle Horizontal Offset, m
45 105
70 38
80 18.5
89 1.5
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POSSIBLE MODELS FOR BASIN THICKNESS
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POSSIBLE MODELS FOR BASIN THICKNESS
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COMPLETE BOUGUER ANOMALY
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WHAT WE THINK IS HAPPENING: A SIMPLE MODEL OF RIGHT-LATERAL FAULT TO EXPLAIN OBSERVED GRAVITY ANOMALY
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COMMENTS, QUESTIONS, CRITICISMS, AND PROVERBIAL REMARKS ARE WELCOME