List of top Geology Questions on Economic Geology asked in IIT JAM GG

\ε\(_{Nd}\) is the deviation of \(^{143}\)Nd/\(^{144}\)Nd of a sample relative to CHUR in parts per 10\(^4\). For a pyroxenite with measured \(^{143}\)Nd/\(^{144}\)Nd = 0.512838 and \(^{147}\)Sm/\(^{144}\)Nd = 0.21, the initial \ε\(_{Nd}\) at 1 Ga is ............ (Round off only the final answer to one decimal place)
Which of the following ore types form(s) by magmatic differentiation?
Match the metal associations in Column 1 to corresponding hosts in Column 2.

The area of a triangular block of a massive orebody is $1500 m^2$. If the thickness of the orebody is 5 m, 6 m and 7 m at the three corners of the triangular block, and the ore density is $2.5 tons/m^3$, the estimated ore reserve of the block is ______ tons. (In integer)
Nickel ores are NOT associated with
Which of the following is the precursor of petroleum?
Hollandite is an ore mineral of which one of the following elements?
Match the ore deposits in Column I with their corresponding ores in Column II.
Column IColumn II
P.Malanjkhand1.Uranium ore
Q.Tummalapalle2.Gold ore
R.Bhukia3.Tin ore
S.Tosham4.Copper ore
Which one of the following statements is CORRECT?
Which one of the following mineral deposits is NOT related to the mining for energy production?
At which of the following locations do lignite deposits occur in India?
A cylindrical copper ore body has a vertical thickness of 45 m and a diameter of 14 m with a density of 2.9 g/cm3. The reserve of the copper ore body is _________ tons. (In integer)
An ore body defined by a 300m x 300m area is shown in the figure in which the drill hole locations on equally spaced square grid are marked (numbers 1-16). The average thickness of the ore body at the 4 interior points is 10.8m, at the 4 corners is 11.0m and at the remaining 8 boundary locations is 10.5m, respectively. The corresponding average grades are 1.5, 1.9 and 1.8wt%, respectively. Calculate the average grade (in wt%) of the full ore body using the Included Area Method. (Round off to two decimal places).
An ore body defined by a 300m x 300m area is shown in the figure
Match the mineral deposit types in Group I with the water types in Group II considered dominantly responsible for their origin.
Group IGroup II
PPorphyry copper deposits1Meteoric water
QMississippi Valley Type deposits2Groundwater
RRoll-front uranium deposits3Magmatic water
SEpithermal gold deposits4Connate water
The cut-off grade of copper is 0.45 wt%. A mine has 1 million tonne of waste with a grade of 0.25 wt%. The mine also has stock of high grade ore with a grade of 1.8 wt%. How much of this high grade ore (in million tonne) must be blended with the waste to sell the blended ore at a grade of 0.5 wt%? (Round off to three decimal places)
A drill run of 3 m was carried out in a coalfield site, where rock core samples were recovered only for a cumulative length of 255 cm. The core loss in percentage is equal to ________. (Answer in integer.)

Match the items in Group I with the corresponding items in Group II. 

Group I                       Group II 
P. Chalcocite                1. Supergene enrichment 
Q. Bauxite                     2. Mechanical accumulation 
R. Monazite placers      3. Magmatic crystallization 
S. Chromite                   4. Residual processes 
 

Match the economic deposits (Group I) with their places of occurrence (Group II). 
Group I             Group II 
P. Iron ore         1. Bhatan 
Q. Base metal    2. Sukinda 
R. Chromite       3. Rampura–Agucha 
S. Uranium        4. Bellary 
 

Which of the following statement(s) regarding hydrocarbon occurrence is/are CORRECT?
Among the following, the tungsten-bearing mineral is
The host rock of Pb-Zn deposit at Zawar is

Match the mineral/metal deposit in Group I with the corresponding Indian occurrence in Group II. 
\[\begin{array}{|l|l|} \hline \textbf{Group I} & \textbf{Group II} \\ \hline \text{P. Diamond} & \text{1. Malanjkhand} \\ \hline \text{Q. Iron} & \text{2. Wajarkaru} \\ \hline \text{R. Fluorite} & \text{3. Dalli Rajhara} \\ \hline \text{S. Copper} & \text{4. Ambadongar} \\ \hline \end{array}\]

Choose the correct statement(s):
A spherical ore body (diameter = 40m) has 7% metal content and density of 3300 kg/m³. The reserve (in tonne) of the ore body is .............
The correct pair of metal and the ore mineral is