placer deposit उदाहरण वाक्य

उदाहरण वाक्य

1. The miners maintained that it was a natural placer deposit that belonged to the discoverers under Spanish law.
2. Besides placer deposits of gold, and gold bearing quartz in weathered rock, gold also occurs in quartz veins.
3. Native nickel-iron alloys with Ni 3 Fe to Ni 2 Fe occur as placer deposits derived from ultramafic rocks.
4. They were also extensively used in hydraulic mining and working placer deposits for gold, tin and other heavy minerals.
5. Initially, discoveries centred on placer deposits, which did not uncover the enormous primary deposits in the form of kimberlite pipes.
6. After the placer deposits were exhausted, mining turned to the lode deposits that were the source of the placer gold.
7. Panning for gold can be used to locate the parent gold veins which are the source of most placer deposits.
8. The location of most Yogo sapphires within igneous rock rather than from alluvial placer deposits requires difficult hard rock mining.
9. Over 3.6 million ounces of gold have been recovered from the Nome district, almost all of it from placer deposits.
10. They are formed by accumulation of such heavy minerals within beach systems, and are a type of " placer deposits ".