Question

Match the metal associations in Column 1 to corresponding hosts in Column 2.

• A. P-ii; Q-iv; R-i; S-iii
• B. P-iv; Q-ii; R-i; S-iii
• C. P-ii; Q-iv; R-iii; S-i
• D. P-ii; Q-i; R-iv; S-iii

Hint:

Geochemical associations help in understanding the origin of metals in different geological environments, such as MORBs, volcanic arcs, and pelagic sediments.

Answer 1

The Correct Option is B

Step 1: Tie each metal set to a host.
We match metal groups in Column 1 to their typical rock or sediment host in Column 2.

Step 2: Place the chromium.
Chromium (R) lives in ultramafic mantle rocks like dunite and harzburgite, so R takes host (i).

Step 3: Place the copper, molybdenum, lead.
Cu, Mo and Pb (S) go with I type granite in volcanic arcs, so S takes host (iii).

Step 4: Place the remaining two.
The Cu, Co, Zn group (P) ties to the seafloor host (iv), and the Mn, Co, Ni group (Q) ties to mid ocean ridge basalt (ii).

Step 5: Combine.
The full match reads P-iv, Q-ii, R-i, S-iii.
\[ \boxed{\text{P-iv; Q-ii; R-i; S-iii}} \]