GEO-ARTICLES

El-Nino – Southern Oscillation

The name ‘ENSO’ is the close interaction between the atmosphere and ocean. It is an irregularly periodic variation in winds and sea-surface temperatures over the tropical eastern pacific ocean, affecting the climate of much of the tropics and subtropics. The warming phase of the sea temperature is known as El-Nino and the cooling phase is […]

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MIS/OIS Marine Isotopic Stages

Marine isotope stages (MIS), marine oxygen-isotope stages, or oxygen isotope stages (OIS) are alternating warm and cool periods in the Earth’s paleoclimate, deducted from oxygen isotope data derived from deep sea core samples. Working backwards from the present, MIS 1 in the scale, stages with even numbers have high levels of O18 and represents cold

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Geophysical Methods (Summery)

Method Measured parameter Used physical property Suitable deposits type Seismic Travel time of reflected & refracted waves Density and Elastic modeVelocity and Acoustic Coal, Oil, Gas, Groundwater, Layered sedimentary basin, Ni- Cu- PGE in volcanic basal flows Gravity Gravity(Variation in earth’s gravitational field) Density contrast between the surrounding and host rock Massive sulfides, Chromite, Ni-Cu-

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Pathfinder elements of ore deposits (Geochemistry)

Type of deposits Pathfinder element Gold- Silver vein type, Gold- Silver- Cobalt- Copper- Zinc and complex sulfide ores As W- Be- Zn- Mo- Cu- Pb- Skarns,Sn- Ba veins B Cu- Pb- Zn- Silver & Complex sulfide deposits Hg, Zn Ba- Ag vein deposit, Porphyry Cu Mn Wolframite- Tin contact metamorphic deposits Mo Porphyry Cu, Barium-

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