How to Calculate and Solve for Bouguer Anomaly | Gravity

The image above represents bourger anomaly. To calculate bourger anomaly, three essential parameters are needed and these parameters are Free Air Correction (g_F), Bouguer Correction (δg_B) and Terrain Correction (δg_T).

The formula for calculating bourger anomaly:

g_B = g_F – δg_B + δg_T

Where:

g_B = Bouguer Anomaly
g_F = Free Air Correction
δg_B = Bouguer Correction
And, δg_T = Terrain Correction

Let’s solve an example;
Find the bourger anomaly when the free air correction is 14, the bourger anomaly is 18 and the terrian correction is 20.

This implies that;

g_F = Free Air Correction = 14
δg_B = Bouguer Correction = 18
And, δg_T = Terrain Correction = 20

g_B = g_F – δg_B + δg_T
That is, g_B = 14 – 18 + 20
g_B = 14 – 38
g_B = -24

Therefore, the bourger anomaly is -24 mGal.

Read more: How to Calculate and Solve for Bouguer Correction | Gravity

Calculating the Terrian Correction when the Bourger Anomaly, the Free Air Correction and the Bourger Correction are Given

δg_T = g_B – g_F + δg_B

Where;

δg_T = Terrain Correction
g_B = Bouguer Anomaly
g_F = Free Air Correction
δg_B = Bouguer Correction

Let’s solve an example;
Find the terrian correction when the bourger anomaly is 48, the free air correction is 22 and the bourger correction is 14.

This implies that;

g_B = Bouguer Anomaly = 48
g_F = Free Air Correction = 22
δg_B = Bouguer Correction = 14

That is, δg_T = g_B – g_F + δg_B
δg_T = 48 – 22 + 14
That is, δg_T = 26 + 14
δg_T = 40

Therefore, the terrian correction is 40.

How to Calculate Bouguer Anomaly | Gravity in Nickzom Calculator

Nickzom Calculator – The Calculator Encyclopedia is capable of calculating the bourger anomaly.

To get the answer and workings of the bourger anomaly using the Nickzom Calculator – The Calculator Encyclopedia. First, you need to obtain the app.

You can get this app via any of these means:

Web – https://www.nickzom.org/calculator-plus

To get access to the professional version via web, you need to register and subscribe for NGN 2,000 per annum to have utter access to all functionalities.
You can also try the demo version via https://www.nickzom.org/calculator

Android (Paid) – https://play.google.com/store/apps/details?id=org.nickzom.nickzomcalculator
Android (Free) – https://play.google.com/store/apps/details?id=com.nickzom.nickzomcalculator
Apple (Paid) – https://itunes.apple.com/us/app/nickzom-calculator/id1331162702?mt=8
Once, you have obtained the calculator encyclopedia app, proceed to the Calculator Map, then click on Geology under Add-on.

Now, Click on Gravity under Geology

Now, Click on Bourger Anomaly under Gravity

The screenshot below displays the page or activity to enter your values, to get the answer for the bourger anomaly according to the respective parameters which are the Free Air Correction (g_F), Bouguer Correction (δg_B) and Terrain Correction (δg_T).

Now, enter the values appropriately and accordingly for the parameters as required by the Free Air Correction (g_F) is 14, Bouguer Correction (δg_B) is 18 and Terrain Correction (δg_T) is 20.

Finally, Click on Calculate

As you can see from the screenshot above, Nickzom Calculator– The Calculator Encyclopedia solves for the bourger anomaly and presents the formula, workings and steps too.