In geophysics .. magnetic and gravity methods are done together .. why ? what is the aim of this ?
2006-10-07 08:01:21 · 3 answers · asked by Geo06 5 in Science & Mathematics ➔ Earth Sciences & Geology
They are not always done together, usually when searching for metal ore bodies. It is because one can be unreliable without the other... for example, a large metal body can have higher gravity because of it's density, but the mag survey will confirm its presenace. Or, a Iron-sandstone may create a false positive without the gravity to show extent. The mag will get initial preseance, and the gravity will help with size, depth, and type of ore.
2006-10-07 16:57:03 · answer #1 · answered by QFL 24-7 6 · 3⤊ 0⤋
They are both simple experiments to run, but setting up a grid takes the longest time. Once the grid has been set up it is a simple process to walk along with the instruments and take two sets of measurements, one for magnetics and the other for gravity.
2006-10-08 12:55:28 · answer #2 · answered by Amphibolite 7 · 1⤊ 0⤋
Geophysics, the study of the earth by quantitative physical methods, especially by seismic, electromagnetic, and radioactivity methods.
2006-10-07 15:04:09 · answer #3 · answered by DanE 7 · 0⤊ 3⤋