geophysics 8 min read
Biochemical Sedimentary
Rocks The Earth System involves many interactions between living organisms and the physical planet. Numerous organisms have evolved the ability…
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Clastic Sedimentary Rocks Formation
Nine hundred years ago, a thriving community of Native Americans inhabited the high plateau of Mesa Verde, Colorado. In hollows…
geophysics 7 min read
Types of Caprocks in Petroleum System
Cap rock Caprock is a rock that prevents the flow of a given fluid at a certain temperature and pressure…
geophysics 10 min read
Induced Polarization
Introduction Conrad Schlumberger (Dobrin 1960) probably was first to report the induced polarization phenomenon, which he called “provoked polarization.” While…
geophysics 8 min read
Electrical Methods
Basic Concept Electrical geophysical prospecting methods detect the surface effects produced by electric current flow in the ground. Using electrical…
geophysics 3 min read
Seismic Wave Theory
Compressional Waves, which are also called P waves, are basically the same as sound (acoustic) waves, except that P waves…
geophysics 5 min read
Electric resistivity methods
rface. These methods utilize differences in electric potential to identify subsurface material. Fundamentals Resistivity is fundamentally related to Ohm’s Law…
geophysics 14 min read
Magnetic Methods
Basic Concepts The Earth possesses a magnetic field caused primarily by sources in the core. The form of the field…
geophysics 16 min read
Gravity Methods
Lateral density changes in the subsurface cause a change in the force of gravity at the surface. The intensity of…
geophysics 8 min read
Geophysical Methods
Geophysical techniques work through applying one of several types of force to the ground, to measure the resulting energy with…
geophysics 2 min read
Magnetic measurements for an archaeological prospection
The magnetic method started to be used in archaeological prospection with an invention of the proton precession magnetometer which enabled…
geophysics 2 min read
Magnetism of rocks and minerals
The overall magnetization of the rocks is a vector sum of induced magnetization (the magnetization present only if an external…